diff --git a/MAINTAINERS b/MAINTAINERS
index afb4cab..fc9e937 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -696,6 +696,13 @@ F: test/test/test_meter.c
 F: examples/qos_meter/
 F: doc/guides/sample_app_ug/qos_metering.rst
 
+MEMBERSHIP
+M: Yipeng Wang <yipeng1.wang@intel.com>
+M: Sameh Gobriel <sameh.gobriel@intel.com>
+F: lib/librte_membership/
+F: doc/guides/prog_guide/membership.rst
+F: test/test/test_membership*
+
 
 Other libraries
 ---------------
diff --git a/config/defconfig_x86_64-native-linuxapp-gcc b/config/defconfig_x86_64-native-linuxapp-gcc
index e69a37e..0a218d5 100644
--- a/config/defconfig_x86_64-native-linuxapp-gcc
+++ b/config/defconfig_x86_64-native-linuxapp-gcc
@@ -41,3 +41,6 @@ CONFIG_RTE_ARCH_64=y
 
 CONFIG_RTE_TOOLCHAIN="gcc"
 CONFIG_RTE_TOOLCHAIN_GCC=y
+
+
+CONFIG_RTE_LIBRTE_MEMBERSHIP=y
diff --git a/doc/guides/prog_guide/img/memship_i1.svg b/doc/guides/prog_guide/img/memship_i1.svg
new file mode 100644
index 0000000..6f011ae
--- /dev/null
+++ b/doc/guides/prog_guide/img/memship_i1.svg
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+				</g>
+				<g id="shape148-616" transform="translate(110.222,-64.9346)">
+					<title>Triangle</title>
+					<desc>Set Summary</desc>
+					<g id="shadow148-617" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+						<path d="M31.4 342.55 L14.67 324.26 L0 342.55 L31.4 342.55 Z" class="st7"/>
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+					<path d="M31.4 342.55 L14.67 324.26 L0 342.55 L31.4 342.55 Z" class="st8"/>
+					<text x="11.82" y="334.65" class="st16">Set <tspan x="4.11" dy="1.2em" class="st4">Summary</tspan></text>				</g>
+				<g id="shape149-623" transform="translate(292.639,20.8827) rotate(45)">
+					<title>Sheet.149</title>
+					<path d="M0 342.55 L14.71 342.55" class="st12"/>
+				</g>
+				<g id="shape150-628" transform="translate(43.2897,-54.1122)">
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+					<path d="M0 342.55 L10.07 342.55" class="st12"/>
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+				<g id="shape151-633" transform="translate(-112.261,8.34531) rotate(-28.1394)">
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+					<path d="M0 342.55 L18 342.55" class="st12"/>
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+				<g id="shape152-638">
+					<title>Sheet.152</title>
+					<desc>Clients</desc>
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+					<text x="21.5" y="339.53" class="st14">Clients</text>				</g>
+				<g id="shape153-641" transform="translate(83.578,-9.58078)">
+					<title>Sheet.153</title>
+					<desc>Distributed Cache</desc>
+					<rect x="0" y="331.723" width="84.1355" height="10.8224" class="st9"/>
+					<text x="13.1" y="339.53" class="st14">Distributed Cache</text>				</g>
+				<g id="shape154-644" transform="translate(181.983,-18.6146)">
+					<title>Sheet.154</title>
+					<desc>Web Servers</desc>
+					<rect x="0" y="331.723" width="64.9346" height="10.8224" class="st9"/>
+					<text x="11.93" y="339.53" class="st14">Web Servers</text>				</g>
+				<g id="shape155-647" transform="translate(96.6068,630.978) rotate(180)">
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+				<g id="shape156-652" transform="translate(173.159,625.567) rotate(180)">
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+				<g id="shadow160-673" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
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+			<g id="shape161-677" transform="translate(83.578,-151.241)">
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+				<rect x="0" y="325.066" width="108.709" height="17.4792" class="st8"/>
+				<text x="4" y="336.81" class="st55">(b) Detecting Routing Loops</text>			</g>
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+				<desc>(c) In-order Workload Scheduler</desc>
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+				<rect x="0" y="325.066" width="127.042" height="17.4792" class="st8"/>
+				<text x="4" y="336.81" class="st55">(c) In-order Workload Scheduler</text>			</g>
+			<g id="shape164-695" transform="translate(307.414,-3.35965)">
+				<title>Sheet.164</title>
+				<desc>(d) Database Semi-join Operations</desc>
+				<g id="shadow164-696" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+					<rect x="0" y="325.066" width="132.451" height="17.4792" class="st7"/>
+				</g>
+				<rect x="0" y="325.066" width="132.451" height="17.4792" class="st8"/>
+				<text x="4" y="336.81" class="st55">(d) Database Semi-join Operations</text>			</g>
+		</g>
+	</g>
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diff --git a/doc/guides/prog_guide/img/memship_i2.svg b/doc/guides/prog_guide/img/memship_i2.svg
new file mode 100644
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+		viewBox="0 0 315.5 90.5" xml:space="preserve" color-interpolation-filters="sRGB" class="st6">
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+			<desc>False Positive Probability = (1-(1-1/m)kn)k ≃ (1-ekn/m)k</desc>
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new file mode 100644
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+				<path d="M0 147.99 C3.18 156.39 7.57 155.78 11.25 152.49 C15.79 148.43 19.26 140.28 27 147.99" class="st10"/>
+			</g>
+			<g id="shape15-58" transform="translate(453.988,127.725) rotate(90)">
+				<title>Sheet.15</title>
+				<path d="M0 147.99 C3.18 156.39 7.57 155.78 11.25 152.49 C15.79 148.43 19.26 140.28 27 147.99" class="st10"/>
+			</g>
+		</g>
+		<g id="shape17-61" transform="translate(322.234,-34.6851) rotate(44.5185)">
+			<title>Sheet.17</title>
+			<path d="M-0 154.73 A35.1884 19.2595 167.75 0 1 42.43 151.77 L42.74 151.96" class="st11"/>
+		</g>
+		<g id="shape18-67" transform="translate(186.188,-18.9001)">
+			<title>Sheet.18</title>
+			<desc>A BF corresponding to each worker thread</desc>
+			<rect x="0" y="127.725" width="118.125" height="27" class="st4"/>
+			<text x="5.14" y="137.63" class="st13">A BF corresponding to <tspan x="11.19" dy="1.2em" class="st9">each worker thread</tspan></text>		</g>
+	</g>
+</svg>
diff --git a/doc/guides/prog_guide/img/memship_i6.svg b/doc/guides/prog_guide/img/memship_i6.svg
new file mode 100644
index 0000000..1d05ffc
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+++ b/doc/guides/prog_guide/img/memship_i6.svg
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+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Generated by Microsoft Visio, SVG Export memship_i6.svg Page-1 -->
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ev="http://www.w3.org/2001/xml-events"
+		width="8.56597in" height="3.47009in" viewBox="0 0 616.75 249.847" xml:space="preserve" color-interpolation-filters="sRGB"
+		class="st16">
+	<style type="text/css">
+	<![CDATA[
+		.st1 {visibility:visible}
+		.st2 {fill:#5b9bd5;fill-opacity:0.22;filter:url(#filter_2);stroke:#5b9bd5;stroke-opacity:0.22}
+		.st3 {fill:#5b9bd5;stroke:#c7c8c8;stroke-width:0.25}
+		.st4 {fill:#feffff;font-family:Calibri;font-size:1.00001em;font-weight:bold}
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+		.st6 {fill:#70ad47;fill-opacity:0.5;stroke:#00b050;stroke-width:1.5}
+		.st7 {fill:none;stroke:none;stroke-width:0.25}
+		.st8 {fill:#00b050;font-family:Calibri;font-size:1.00001em}
+		.st9 {fill:none;stroke:#ff0000;stroke-width:0.25}
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+
+	<defs id="Markers">
+		<g id="lend5">
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+		<marker id="mrkr5-33" class="st12" refX="-3.71" orient="auto" markerUnits="strokeWidth" overflow="visible">
+			<use xlink:href="#lend5" transform="scale(-2.12,-2.12) "/>
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+	</defs>
+	<defs id="Filters">
+		<filter id="filter_2">
+			<feGaussianBlur stdDeviation="2"/>
+		</filter>
+	</defs>
+	<g>
+		<title>Page-1</title>
+		<g id="group123-1" transform="translate(3.0294,-5.3478)">
+			<title>Sheet.123</title>
+			<g id="group121-2">
+				<title>Sheet.121</title>
+				<g id="shape49-3" transform="translate(449.422,-57.9401)">
+					<title>Rectangle.2</title>
+					<g id="shadow49-4" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+						<rect x="0" y="208.396" width="99.4817" height="41.4507" class="st2"/>
+					</g>
+					<rect x="0" y="208.396" width="99.4817" height="41.4507" class="st3"/>
+				</g>
+				<g id="shape50-8" transform="translate(295.177,-16.6936)">
+					<title>Rectangle.4</title>
+					<g id="shadow50-9" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+						<rect x="0" y="166.945" width="99.4817" height="82.9014" class="st2"/>
+					</g>
+					<rect x="0" y="166.945" width="99.4817" height="82.9014" class="st3"/>
+				</g>
+				<g id="shape52-13" transform="translate(6.07514E-013,-29.0155)">
+					<title>Rectangle.10</title>
+					<desc>Signatures for target 1</desc>
+					<g id="shadow52-14" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+						<rect x="0" y="179.38" width="99.4817" height="70.4662" class="st2"/>
+					</g>
+					<rect x="0" y="179.38" width="99.4817" height="70.4662" class="st3"/>
+					<text x="14.94" y="211.01" class="st4">Signatures for <tspan x="30.22" dy="1.2em" class="st5">target </tspan>1</text>				</g>
+				<g id="shape53-20" transform="translate(286.887,-24.9837)">
+					<title>Sheet.53</title>
+					<rect x="0" y="237.411" width="116.062" height="12.4352" class="st6"/>
+				</g>
+				<g id="shape54-22" transform="translate(227.102,-26.6257)">
+					<title>Sheet.54</title>
+					<desc>Match 1</desc>
+					<rect x="0" y="237.411" width="66.3211" height="12.4352" class="st7"/>
+					<text x="13.06" y="247.23" class="st8">Match 1</text>				</g>
+				<g id="shape55-25" transform="translate(215.225,-227.669)">
+					<title>Sheet.55</title>
+					<desc>Packet Payload</desc>
+					<rect x="0" y="233.266" width="99.4817" height="16.5803" class="st9"/>
+					<text x="19.04" y="244.56" class="st10">Packet Payload</text>				</g>
+				<g id="shape56-28" transform="translate(514.813,22.1781) rotate(90)">
+					<title>Sheet.56</title>
+					<path d="M0 249.85 L16.52 249.85" class="st11"/>
+				</g>
+				<g id="shape96-34" transform="translate(6.07514E-013,-101.124)">
+					<title>Sheet.96</title>
+					<desc>Attack Signature Length 1</desc>
+					<rect x="0" y="224.976" width="99.4817" height="24.8704" class="st7"/>
+					<text x="9.53" y="233.81" class="st13">Attack Signature <tspan x="28.7" dy="1.2em" class="st5">Length </tspan>1</text>				</g>
+				<g id="group114-38" transform="translate(227.979,-150.865)">
+					<title>Sheet.114</title>
+					<g id="group106-39" transform="translate(0,-24.8704)">
+						<title>Sheet.106</title>
+						<g id="shape100-40" transform="translate(3.65707E-013,-12.4352)">
+							<title>Rectangle.100</title>
+							<g id="shadow100-41" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+								<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st2"/>
+							</g>
+							<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st3"/>
+						</g>
+						<g id="shape101-45" transform="translate(24.8704,-12.4352)">
+							<title>Rectangle.101</title>
+							<g id="shadow101-46" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+								<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st2"/>
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+							<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st3"/>
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+						<g id="shape102-50" transform="translate(49.7409,-12.4352)">
+							<title>Rectangle.102</title>
+							<g id="shadow102-51" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
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+							<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st3"/>
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+						<g id="shape103-55">
+							<title>Rectangle.103</title>
+							<g id="shadow103-56" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+								<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st2"/>
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+					<g id="group107-70">
+						<title>Sheet.107</title>
+						<g id="shape108-71" transform="translate(3.65707E-013,-12.4352)">
+							<title>Rectangle.100</title>
+							<g id="shadow108-72" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+								<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st2"/>
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+							<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st3"/>
+						</g>
+						<g id="shape109-76" transform="translate(24.8704,-12.4352)">
+							<title>Rectangle.101</title>
+							<g id="shadow109-77" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+								<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st2"/>
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+							<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st3"/>
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+						<g id="shape110-81" transform="translate(49.7409,-12.4352)">
+							<title>Rectangle.102</title>
+							<g id="shadow110-82" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+								<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st2"/>
+							</g>
+							<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st3"/>
+						</g>
+						<g id="shape111-86">
+							<title>Rectangle.103</title>
+							<g id="shadow111-87" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+								<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st2"/>
+							</g>
+							<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st14"/>
+						</g>
+						<g id="shape112-91" transform="translate(24.8704,1.42109E-013)">
+							<title>Rectangle.104</title>
+							<g id="shadow112-92" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+								<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st2"/>
+							</g>
+							<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st3"/>
+						</g>
+						<g id="shape113-96" transform="translate(49.7409,1.42109E-013)">
+							<title>Rectangle.105</title>
+							<g id="shadow113-97" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+								<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st2"/>
+							</g>
+							<rect x="0" y="237.411" width="24.8704" height="12.4352" class="st14"/>
+						</g>
+					</g>
+				</g>
+				<g id="shape89-101" transform="translate(373.169,-144.96) rotate(19.406)">
+					<title>Sheet.89</title>
+					<path d="M0 249.85 L185.02 249.85" class="st11"/>
+				</g>
+				<g id="shape115-106" transform="translate(116.062,-1.22213E-012)">
+					<title>Rectangle.115</title>
+					<desc>Signatures for target 2</desc>
+					<g id="shadow115-107" transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+						<rect x="0" y="150.365" width="99.4817" height="99.4817" class="st2"/>
+					</g>
+					<rect x="0" y="150.365" width="99.4817" height="99.4817" class="st3"/>
+					<text x="14.94" y="196.51" class="st4">Signatures for <tspan x="30.22" dy="1.2em" class="st5">target </tspan>2</text>				</g>
+				<g id="shape116-113" transform="translate(116.062,-101.124)">
+					<title>Sheet.116</title>
+					<desc>Attack Signature Length 2</desc>
+					<rect x="0" y="224.976" width="99.4817" height="24.8704" class="st7"/>
+					<text x="9.53" y="233.81" class="st13">Attack Signature <tspan x="28.7" dy="1.2em" class="st5">Length </tspan>2</text>				</g>
+				<g id="shape117-117" transform="translate(290.155,-101.124)">
+					<title>Sheet.117</title>
+					<desc>Attack Signature Length X</desc>
+					<rect x="0" y="224.976" width="99.4817" height="24.8704" class="st7"/>
+					<text x="9.53" y="233.81" class="st13">Attack Signature <tspan x="28.62" dy="1.2em" class="st5">Length X</tspan></text>				</g>
+				<g id="shape118-121" transform="translate(447.668,-102.857)">
+					<title>Sheet.118</title>
+					<desc>Attack Signature Length L</desc>
+					<rect x="0" y="224.976" width="99.4817" height="24.8704" class="st7"/>
+					<text x="9.53" y="233.81" class="st13">Attack Signature <tspan x="29.22" dy="1.2em" class="st5">Length L</tspan></text>				</g>
+				<g id="shape119-125" transform="translate(439.378,-65.7997)">
+					<title>Sheet.119</title>
+					<rect x="0" y="237.411" width="116.062" height="12.4352" class="st6"/>
+				</g>
+				<g id="shape120-127" transform="translate(547.149,-63.8181)">
+					<title>Sheet.120</title>
+					<desc>Match 2</desc>
+					<rect x="0" y="237.411" width="66.3211" height="12.4352" class="st7"/>
+					<text x="13.06" y="247.23" class="st8">Match 2</text>				</g>
+				<g id="shape85-130" transform="translate(441.66,-55.3013) rotate(53.6564)">
+					<title>Sheet.85</title>
+					<path d="M0 249.85 L150.51 249.85" class="st11"/>
+				</g>
+			</g>
+			<g id="shape122-135" transform="translate(175.448,-169.167)">
+				<title>Sheet.122</title>
+				<desc>HTSS</desc>
+				<rect x="0" y="224.976" width="53.8859" height="24.8704" class="st7"/>
+				<text x="8.3" y="242.81" class="st15">HTSS</text>			</g>
+		</g>
+	</g>
+</svg>
diff --git a/doc/guides/prog_guide/img/memship_i7.svg b/doc/guides/prog_guide/img/memship_i7.svg
new file mode 100644
index 0000000..231b309
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diff --git a/doc/guides/prog_guide/index.rst b/doc/guides/prog_guide/index.rst
index ef5a02a..096cc93 100644
--- a/doc/guides/prog_guide/index.rst
+++ b/doc/guides/prog_guide/index.rst
@@ -48,6 +48,7 @@ Programmer's Guide
     timer_lib
     hash_lib
     efd_lib
+    membership_lib
     lpm_lib
     lpm6_lib
     packet_distrib_lib
@@ -187,6 +188,19 @@ Programmer's Guide
 
 :numref:`figure_efd11` :ref:`figure_efd11`
 
+:numref:`figure_membership1` :ref:`figure_membership1`
+
+:numref:`figure_membership2` :ref:`figure_membership2`
+
+:numref:`figure_membership3` :ref:`figure_membership3`
+
+:numref:`figure_membership4` :ref:`figure_membership4`
+
+:numref:`figure_membership5` :ref:`figure_membership5`
+
+:numref:`figure_membership6` :ref:`figure_membership6`
+
+:numref:`figure_membership7` :ref:`figure_membership7`
 
 **Tables**
 
diff --git a/doc/guides/prog_guide/membership_lib.rst b/doc/guides/prog_guide/membership_lib.rst
new file mode 100644
index 0000000..fb11249
--- /dev/null
+++ b/doc/guides/prog_guide/membership_lib.rst
@@ -0,0 +1,424 @@
+﻿..  BSD LICENSE
+    Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+    * Neither the name of Intel Corporation nor the names of its
+    contributors may be used to endorse or promote products derived
+    from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Membership Library
+=======================
+
+Introduction
+------------
+The DPDK Membership Library provides an API for DPDK applications to insert a
+new member, delete an existing member, or query the existence of a member in a
+given set, or a group of sets. For the case of a group of sets the library
+will return not only whether the element has been inserted before in one of
+the sets but also which set it belongs to.  The Membership Library is an
+extension and generalization of a traditional filter structure (for example
+Bloom Filter [Memship-bloom]) that has multiple usages in a wide variety of
+workloads and applications. In general, the Membership Library is a data
+structure that provides a “set-summary” on whether a member belongs to a set,
+and as discussed in details later, there are two advantages of using such a
+set-summary rather than operating on a “full-blown” complete list of elements:
+first, it has a much smaller storage requirement than storing the whole list of
+elements themselves, and secondly checking an element membership (or other
+operations) in this set-summary is much faster than checking it for the
+original full-blown complete list of elements.
+
+We use the term “Set-Summary” in this guide to refer to the space-efficient,
+probabilistic membership data structure that is provided by the library. A
+membership test for an element will return the set this element belongs to or
+null (meaning not found) with very high probability of accuracy. Set-summary
+is a fundamental data aggregation component that can be used in many network
+(and other) applications. It is a crucial structure to address performance and
+scalability issues of diverse network applications including overlay networks,
+data-centric networks, flow table summaries, network statistics and
+traffic monitoring. A set-summary is useful for applications who need to
+include a list of elements while a complete list requires too much space
+and/or too much processing cost. In these situations, the set-summary works as
+a lossy hash-based representation of a set of members. It can dramatically
+reduce space requirement and significantly improve the performance of set
+membership queries at the cost of introducing a very small membership test error
+probability.
+
+.. _figure_membership1:
+.. figure:: img/memship_i1.*
+
+  Example Usages of Membership Library
+
+We believe that there are various usages for a Membership Library in a very
+large set of applications and workloads. Interested readers can refer to
+[Memship-survey] for a survey of possible networking usages. The above figure
+provide a small set of examples of using the Membership Library. Sub-figure(a)
+depicts a distributed web cache architecture where a collection of proxies
+attempt to share their web caches (cached from a set of backend web servers) to
+provide faster responses to clients, and the proxies uses the Membership
+Library to share summaries of what webpages they are caching. With the
+Membership Library, a proxy receiving an \http request will inquire the
+set-summary to find its location and quickly determine whether to retrieve the
+requested webpage from a nearby proxy or from a backend web server.
+Sub-figure(b) depicts another example for using the Membership Library to
+prevent routing loops which is typically done using slow TTL countdown and
+dropping packets when TTL expires. As shown in Sub-figure(b), an embedded
+set-summary in the packet header itself can be used to summarize the set of
+nodes a packet has gone through, and each node upon receiving a packet can check
+whether its id is a member of the set of visited nodes, and if it is then a
+routing loop is detected. Sub-Figure(c) presents another usage of Membership
+Library to load balance flows to worker threads with in-order guarantee where a
+set-summary is used to query if a packet belongs to an existing flow or a new
+flow. Packets belonging to a new flow are forwarded to the current least loaded
+worker thread, while those belonging to an existing flow are forwarded to the
+pre-assigned thread to guarantee in-order processing. Sub-figure(d) highlights
+yet another usage example in the database domain where a set-summary is used to
+determine joins between sets instead of creating a join by comparing each
+element of a set against the other elements in a different set, a join is done
+on the summaries since they can efficiently encode members of a given set.
+
+We are including a configurable Membership Library in DPDK to cover set
+membership functionality for both a single set and multi-set scenarios. The
+library is optimized to support the customer network applications which require
+membership checking functionality. In this guide, we will cover few set-summary
+schemes including Bloom Filter, vector of Bloom Filters, abd Hash-Table based
+set-summary schemes with and without false negative probability, followed by
+a brief discussion of the Membership Library API.
+
+Bloom Filter
+---------------
+
+The Bloom Filter (BF) [Memship-bloom] is a well-known space-efficient
+probabilistic data structure that answers set membership queries (test whether
+an element is a member of a set) with some probability of false positives and
+zero false negatives; a query for an element returns either it is "possibly in
+a set" (with very high probability) or "definitely not in a set".
+
+The BF is a method for representing a set of n elements (for example flow keys
+in network applications domain) to support membership queries. The idea of BF is
+to allocate a bit-vector v with m bits, which are initially all set to 0. Then
+it chooses k independent hash functions h1, h2, … hk with hash values range from
+1 to m to perform hashing calculations on each element. Every time when an
+element X being inserted into the set, the bits at positions h1(X), h2(X), …
+hk(X) in v are set to 1 (any particular bit might be set to 1 multiple times
+for multiple different inserted elements). Given a query for any element Y, the
+bits at positions h1(Y), h2(Y), ... hk(Y) are checked. If any of them is 0,
+then Y is definitely not in the set. Otherwise there is a high probability that
+Y is a member of the set with certain false positive probability. As shown in
+the next equation, the false positive probability can be made arbitrarily small
+by changing the number of hash functions (k) and the vector length (m).
+
+.. _figure_membership2:
+.. figure:: img/memship_i2.*
+
+  Bloom Filter False Positive Probability
+
+Without BF, an accurate membership testing could involve a costly hash table
+lookup and full element comparison. The advantage of using a BF is to simplify
+the membership test into a series of hash calculations and memory accesses for a
+small bit-vector, which can be easily optimized. Hence the lookup throughput
+(set membership test) can be significantly faster than a normal hash table
+lookup with element comparison.
+
+.. _figure_membership3:
+.. figure:: img/memship_i3.*
+
+  Detecting Routing Loops Using BF
+
+By design, BF is used for applications that need only one set, and the
+membership of elements is checked against its set-summary. The example discussed
+in the above figure is one example of potential applications that uses only one
+set to capture the node IDs that have been visited so far by the packet. Each
+node will then check this embedded BF in the packet header for its own id, and
+if the BF indicates that the current node is definitely not in the set then a
+loop-free route is guaranteed.
+
+
+Vector of Bloom Filters
+--------------------------
+
+.. _figure_membership4:
+.. figure:: img/memship_i4.*
+
+  Vector Bloom Filter (vBF) Overview
+
+Vector Bloom Filter (vBF) is another scheme supported by the Membership Library
+to support more than one set.  The membership test is conducted on all of the
+set-summaries concurrently to determine which set(s) it belongs to or none of
+them. The basic idea of vBF is shown in the above figure where an element is
+used to address multiple bloom filters concurrently and the bloom filter
+index(es) with a hit is returned.
+
+.. _figure_membership5:
+.. figure:: img/memship_i5.*
+
+  vBF for Flow Scheduling to Worker Thread
+
+As previously mentioned, there are many usages of such structure. vBF is used
+for applications that needs to check membership against multiple sets
+simultaneously. The example discussed in the above figure uses a set to capture
+all flows being assigned for processing at a given worker thread. Upon receiving
+a packet the vBF is used to figure quickly if this packet belongs to a new flow
+so as to be forwarded to the current least loaded worker thread, or otherwise it
+should be queued for an existing thread to guarantee in-order processing (i.e.
+the property of vBF to indicate right away that a given flow is a new one or
+not is critical to minimize response time latency).
+
+It should be noted that vBF can be implemented using a set of single bloom
+filters with sequential lookup of each BF. However, being able to concurrently
+search all set-summaries is a big throughput advantage and the implementation
+can typically be fully optimized across different CPU architectures. For
+example, on IA prefetching and vector instructions (AVX) can be used for
+optimizations.
+
+
+Hash-Table based Set-Summaries
+---------------------------------
+
+Hash-table based set-summary (HTSS) is another scheme in the membership library.
+Cuckoo filter [Memship-cfilter] is an example of hash-table based set summary.
+HTSS can be easily extended to support multi-set membership testing like what
+vBF does. Meanwhile, HTSS can easily outperform vBF when the number of sets is
+large, since HTSS uses a single hash table for membership testing while vBF
+requires testing a series of Bloom Filters each corresponding to one set.
+
+.. _figure_membership6:
+.. figure:: img/memship_i6.*
+
+  Using HTSS for Attack Signature Matching
+
+As shown in the above figure, attack signature matching where each set
+represents a certain signature length (for correctness of this example, an
+attack signature should not be a subset of another one) in the payload is a good
+example for using HTSS with 0% false negative (i.e., when an element returns not
+found, it has a 100% certainty that it is not a member of any set).  The packet
+inspection application benefits from knowing right away that the current payload
+does not match any attack signatures in the database to establish its
+legitimacy, otherwise a deep inspenction of the packet is needed.
+
+HTSS employs a similar but simpler data structure to a traditional hash table,
+and the major difference is that HTSS stores only the signatures but not the
+full keys/elements which can significantly reduce the footprint of the table.
+Along with the signature, HTSS also stores a value to indicate the target set.
+When looking up for an element, the element is hashed and the HTSS is addressed
+to retrieve the signature stored. If the signature matches then the value is
+retrieved corresponding to the index of the target set which the element belongs
+to. Because signatures can collide, HTSS can still has false positive
+probability similar to vBF. Furthermore, if elements are allowed to be
+overwritten or evicted when the hash table becomes full, it will also have a
+false negative probability. We discuss this case in the next section.
+
+Set-Summaries with False Negative Probability
+-----------------------------------------------
+
+As previously discussed, traditional set-summaries (e.g. Bloom Filters ) do not
+have a false negative probability, i.e., it is 100% certain when an element
+returns “not to be present” for a given set. However, the Membership Library
+also supports a set-summary probabilistic data structure based on HTSS which
+allows for false negative probability.
+
+
+In HTSS, when the hash table becomes full, keys/elements will fail to be added
+into the table and the hash table has to be resized to accommodate for these new
+elements, which can be expensive. However, if we allow new elements to overwrite
+or evict existing elements (as a cache typically does), then the resulting
+set-summary will begin to have false negative probability. This is because the
+element that was evicted from the set-summary may still be present in the target
+set. For subsequent inquiries the set-summary will falsely report the element
+not being in the set, hence having a false negative probability.
+
+The major usage of HTSS with false negative is to use it as a cache for
+distributing elements to different target sets. By allowing HTSS to evict old
+elements, the set-summary can keep track of the most recent elements
+(i.e. active) as a cache typically does. Old inactive elements (infrequently
+used elements) will automatically and eventually get evicted from the
+set-summary. It should be noted that given an element the lookup can always fall
+back to a sequential search of the sets if the set-summary fails to correctly
+report its existence.
+
+.. _figure_membership7:
+.. figure:: img/memship_i7.*
+
+  Using HTSS with False Negatives for Wild Card Classification
+
+HTSS with false negative (i.e. a cache) has also its wide set of applications.
+For example Wild card flow classification (e.g. ACL rules) highlighted in the
+above figure is an example of such application. In that case each target set
+represents a sub-table with rules defined by a certain flow mask. The flow masks
+are non-overlapping, and for flows matching more than one rule only the highest
+priority one is inserted in the corresponding sub-table (interested readers can
+refer to the Open vSwitch (OvS) design of Mega Flow Cache (MFC) [Memship-OvS]
+for further details) Typically the rules will have a large number of distinct
+unique masks and hence, a large number of target sets each corresponding to one
+mask. Because the active set of flows varies widely based on the network
+traffic, HTSS with false negative will act as a cache for <flowid, target ACL
+sub-table> pair for the current active set of flows. When a miss occurs (as
+shown in red in the above figure) the sub-tables will be searched sequentially
+one by one for a possible match, and when found the flow key and target
+sub-table will be inserted in the set-summary (i.e. cache insertion) so
+subsequent packets from the same flow don’t incur the overhead of the
+sequential search of sub-tables.
+
+Library API Overview
+--------------------
+The design goal of the Membership Library API is to be as generic as possible to
+support all the different types of set-summaries we discussed in previous
+sections and beyond. Fundamentally, the APIs need to include query, creation,
+insertion, deletion, and lookup. Other functions like retrieving a set-summary
+by name and destroying a certain set-summary, etc. are also needed but are very
+common, straightforward, and similar to other libraries in DPDK.
+
+Set-summary Type Query
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+*void rte\_ms\_type\_query(enum rte\_ms\_setsum\_type\*\* types)*
+
+This function intends to serve as a convenient tool to query which set-summary
+types are supported in the current version of DPDK. Since the implementations of
+the set-summaries can vary, initial versions of the Membership Library may only
+support a subset of the set-summaries we discussed previously. Programmers could
+use this API to decide which type is available to use in the current version of DPDK.
+
+Set-summary Create
+~~~~~~~~~~~~~~~~~~~~~
+
+*rte\_membership\_create(const struct rte\_membership\_parameters \*params)*
+
+This function is used to create a set-summary structure, the input parameters
+are those needed to initialize the set-summary, while the function returns the
+pointer to the created set-summary or NULL if the creation failed.
+
+Tha input argument parameters used when creating the set-summary are, *name*
+which is the name of the created set-summary, *type* which is one of the types
+supported by the library (BF, vBF, Cache or Hash Table set-summary), *num\_keys*
+which is the maximum total number of elements/keys in the set-summary structure,
+*key\_len* is the length of the element/key. *prim\_hash\_seed* and
+*sec\_hash\_seed* are the seeds of the primary and secondary hash functions,
+while *socket\_id* is the NUMA socket ID for the memory used to create the
+set-summary. The other two parameters that are
+relevant to only the BF and vBF types are *num\_target* which is the number of
+targets (i.e. number of set-summaries), and *false\_pos\_rate* which is the
+maximum allowable false positive probability by the application (in case of BF
+and vBF the two arguments num\_keys and false\_pos\_rate will used to determine
+the number of hash functions and the bit-vector size to gurantee that the actual
+false positive rate is lower than the maximum allowed).
+
+Set-summary Element Insertion
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+*rte\_membership\_add(const void *setsum, const void *key, MEMBERSHIP\_TARGET\_TYPE target\_id)*
+
+This function insert an element/key in a set-summary structure, if it fails an
+error is returned. For success the returned value is defferent based on the
+set-summary mode to provide extra information for the users. For both BF and vBF
+modes, a return value of 0 means a successful insert. For HTSS mode, the return
+value in case of success is the index of the inserted entry in the hash bucket.
+For cache mode, in case of successful insert the return value is 0 if the insert
+does not cause an eviction out of the cache (i.e. no overwriting happensto an
+existing entry) and the value of 1 is returned if an existing entry is evicted
+out of the cache.
+
+The input arguements for the function are *setsum* which is the pointer to the
+set-summary structure, *key* which is a pointer to the element/key that needs to
+be added to the set-summary, and, *target\_id* which is the target id associated
+with the key that needs to be added (for the case of BF mode the target id
+should be no larger than 1).
+
+
+Set-summary Element Lookup
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+*rte\_membership\_lookup(const void \*setsum, const void \*key, MEMBERSHIP\_TARGET\_TYPE \*target\_id)*
+
+This function looks up a single key/element in the set-summary structure. It
+returns as soon the first match is found (no further matching of subsequent
+targets, for example for the vBF mode, is performed) the return value is 1 if a
+match is found and 0 otherwise. The arguments for the function are *setsum*
+which is pointer of a set-summary structure, *key* which is a pointer to the
+element/key that needs to be looked up, *target\_id* which is used to return the
+first target set id where the key has matched, if any.
+
+*rte\_membership\_lookup\_bulk(const void \*setsum, const void \*\*keys, uint32\_t num\_keys, MEMBERSHIP\_TARGET\_TYPE \*target\_ids)*
+
+This function looks up a bulk of keys/elements elements simultaneously in the
+set-summary structure, each key lookup returns as soon as the first match is found. The
+return value is the number of keys that find a match. The arguments of the
+function are *setsum* which is a pointer to the set-summary structure, *keys* is
+a pointer to a bulk of keys that are to be looked up, *num\_keys* is the number
+of keys that will are to be looked up, *target\_ids* are the return target set
+ids for the first match found for each of the input keys.
+
+*rte\_membership\_lookup\_multi(const void \*setsum, const void \*key, MEMBERSHIP\_TARGET\_TYPE \*target\_id)*
+
+This function looks up a single key/element in the set-summary structure. It
+returns ALL the matches (possibly more than one) found for this key when it
+is matched against all target sets (This lookup function can be used with the
+vBF and HT modes of set summaries). The return value is the number of matches
+that was found for this key (for both BF and Cache modes the return value
+should be at most 1). The arguments for the function are *setsum*
+which is pointer of a set-summary structure, *key* which is a pointer to the
+element/key that needs to be looked up, *target\_id* which is used to return all
+target set ids where the key has matched, if any.
+
+*rte\_membership\_lookup\_multi\_bulk(const void \*setsum, const void \*\*keys, uint32\_t num\_keys, uint32\_t max\_match\_per\_key, uint32\_t \*match\_count, MEMBERSHIP\_TARGET\_TYPE \*target\_ids)*
+
+This function looks up a bulk of keys/elements elements simultaneously in the
+set-summary structure, each key lookup returns ALL the matches (possibly more
+than one) found for this key when it is matched against all target sets (This
+lookup function can be used with the vBF and HT modes of set summaries). The
+return value is the number of keys that find one or more matches in the
+set-summary structure. The arguments of the
+function are *setsum* which is a pointer to the set-summary structure, *keys* is
+a pointer to a bulk of keys that are to be looked up, *num\_keys* is the number
+of keys that will are to be looked up, *max\_match\_per\_key* is the possible
+max number of matches for each key, *match\_count* which is the returned number
+of matches for all the keys, and *target\_ids* are the return target set
+ids for the first match found for each of the input keys.
+
+
+Set-summary Element Delete [1]_
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+*rte\_membership\_delete(void \*setsum, const void \*key, MEMBERSHIP\_TARGET\_TYPE target\_id)*
+
+This function deletes an element/key from a set-summary structure, if it fails
+an error is returned. The input arguements for the function are *setsum* which
+is the pointer to the set-summary structure, *key* which is a pointer to the
+element/key that needs to be deleted from the set-summary, and, *target\_id*
+which is used with the vBF and HT set-summary types to delete the key from
+certain target ids.
+
+.. [1] Traditional bloom filter does not support proactive deletion. Proactive deletion may require additional implementation and performance overhead.
+
+References
+-----------
+
+[Memship-bloom] B H Bloom, "Space/Time Trade-offs in Hash Coding with Allowable Errors," Communications of the ACM, 1970.
+
+[Memship-survey] A Broder and M Mitzenmacher, "Network Applications of Bloom Filters: A Survey," in Internet Mathematics, 2005.
+
+[Memship-cfilter] B Fan, D G Andersen and M Kaminsky, "Cuckoo Filter: Practically Better Than Bloom," in Conference on emerging Networking Experiments and Technologies, 2014.
+
+[Memship-OvS] B Pfaff, "The Design and Implementation of Open vSwitch," in NSDI, 2015.
\ No newline at end of file
diff --git a/lib/Makefile b/lib/Makefile
index 07e1fd0..be1ee2d 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -30,7 +30,6 @@
 #   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 include $(RTE_SDK)/mk/rte.vars.mk
-
 DIRS-y += librte_compat
 DIRS-$(CONFIG_RTE_LIBRTE_EAL) += librte_eal
 DIRS-$(CONFIG_RTE_LIBRTE_RING) += librte_ring
@@ -106,6 +105,8 @@ DIRS-$(CONFIG_RTE_LIBRTE_REORDER) += librte_reorder
 DEPDIRS-librte_reorder := librte_eal librte_mempool librte_mbuf
 DIRS-$(CONFIG_RTE_LIBRTE_PDUMP) += librte_pdump
 DEPDIRS-librte_pdump := librte_eal librte_mempool librte_mbuf librte_ether
+DIRS-$(CONFIG_RTE_LIBRTE_MEMBERSHIP) += librte_membership
+DEPDIRS-librte_membership := librte_eal librte_mempool librte_hash librte_sched
 
 ifeq ($(CONFIG_RTE_EXEC_ENV_LINUXAPP),y)
 DIRS-$(CONFIG_RTE_LIBRTE_KNI) += librte_kni
diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
index ddf65b7..3e712c2 100644
--- a/lib/librte_eal/common/eal_common_log.c
+++ b/lib/librte_eal/common/eal_common_log.c
@@ -270,6 +270,7 @@ struct logtype {
 	{RTE_LOGTYPE_CRYPTODEV,  "cryptodev"},
 	{RTE_LOGTYPE_EFD,        "efd"},
 	{RTE_LOGTYPE_EVENTDEV,   "eventdev"},
+	{RTE_LOGTYPE_MEMBERSHIP, "membership"},
 	{RTE_LOGTYPE_USER1,      "user1"},
 	{RTE_LOGTYPE_USER2,      "user2"},
 	{RTE_LOGTYPE_USER3,      "user3"},
diff --git a/lib/librte_eal/common/include/rte_log.h b/lib/librte_eal/common/include/rte_log.h
index 3419138..a323411 100644
--- a/lib/librte_eal/common/include/rte_log.h
+++ b/lib/librte_eal/common/include/rte_log.h
@@ -87,6 +87,7 @@ struct rte_logs {
 #define RTE_LOGTYPE_CRYPTODEV 17 /**< Log related to cryptodev. */
 #define RTE_LOGTYPE_EFD       18 /**< Log related to EFD. */
 #define RTE_LOGTYPE_EVENTDEV  19 /**< Log related to eventdev. */
+#define RTE_LOGTYPE_MEMBERSHIP 20/**< Log related to membership. */
 
 /* these log types can be used in an application */
 #define RTE_LOGTYPE_USER1     24 /**< User-defined log type 1. */
diff --git a/lib/librte_membership/Makefile b/lib/librte_membership/Makefile
new file mode 100644
index 0000000..0228378
--- /dev/null
+++ b/lib/librte_membership/Makefile
@@ -0,0 +1,48 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# library name
+LIB = librte_membership.a
+
+CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -O3
+
+EXPORT_MAP := rte_membership_version.map
+
+LIBABIVER := 2
+
+# all source are stored in SRCS-y
+SRCS-$(CONFIG_RTE_LIBRTE_MEMBERSHIP) +=  rte_membership.c rte_membership_ht.c rte_membership_cache.c rte_membership_bf.c rte_membership_vbf.c
+# install includes
+SYMLINK-$(CONFIG_RTE_LIBRTE_MEMBERSHIP)-include := rte_membership.h
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_membership/rte_membership.c b/lib/librte_membership/rte_membership.c
new file mode 100644
index 0000000..b1e01c6
--- /dev/null
+++ b/lib/librte_membership/rte_membership.c
@@ -0,0 +1,378 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "rte_membership.h"
+#include "rte_membership_ht.h"
+#include "rte_membership_cache.h"
+#include "rte_membership_vbf.h"
+#include "rte_membership_bf.h"
+
+
+
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_malloc.h>
+#include <rte_eal.h>
+#include <rte_eal_memconfig.h>
+#include <rte_errno.h>
+
+TAILQ_HEAD(rte_membership_list, rte_tailq_entry);
+static struct rte_tailq_elem rte_membership_tailq = {
+	.name = "RTE_MEMBERSHIP",
+};
+EAL_REGISTER_TAILQ(rte_membership_tailq)
+
+void
+rte_membership_free(void *ss)
+{
+	struct rte_membership_setsum *setsum = ss;
+	if (setsum == NULL)
+		return;
+	switch (setsum->type) {
+		case SETSUM_TYPE_HT:
+			rte_membership_free_ht(setsum);
+			break;
+		case SETSUM_TYPE_CACHE:
+			rte_membership_free_cache(setsum);
+			break;
+		case SETSUM_TYPE_BF:
+			rte_membership_free_bf(setsum);
+			break;
+		case SETSUM_TYPE_VBF:
+			rte_membership_free_vbf(setsum);
+			break;
+		default:
+			break;
+	}
+	rte_free(setsum);
+}
+
+
+void *
+rte_membership_create(const struct rte_membership_parameters *params)
+{
+	struct rte_tailq_entry *te;
+	struct rte_membership_list *membership_list = NULL;
+	struct rte_membership_setsum *setsum = NULL;
+	int ret;
+
+	if (params == NULL) {
+		return NULL;
+	}
+
+	membership_list = RTE_TAILQ_CAST(rte_membership_tailq.head,
+													rte_membership_list);
+
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	TAILQ_FOREACH(te, membership_list, next) {
+		setsum = (struct rte_membership_setsum *) te->data;
+		if (strncmp(params->name, setsum->name, RTE_MEMBERSHIP_NAMESIZE) == 0)
+			break;
+	}
+	setsum = NULL;
+	if (te != NULL) {
+		rte_errno = EEXIST;
+		te = NULL;
+		goto error_unlock_exit;
+	}
+
+	te = rte_zmalloc("MEMBERSHIP_TAILQ_ENTRY", sizeof(*te), 0);
+	if (te == NULL){
+		RTE_LOG(ERR, MEMBERSHIP, "tailq entry allocation failed\n");
+		goto error_unlock_exit;
+	}
+
+
+
+	/* Create a new setsum structure */
+	setsum = (struct rte_membership_setsum *) rte_zmalloc_socket(params->name,
+			sizeof(struct rte_membership_setsum),
+			RTE_CACHE_LINE_SIZE,
+			params->socket_id);
+
+	if (setsum == NULL) {
+		RTE_LOG(ERR, MEMBERSHIP, "Create setsummary failed\n");
+		goto error_unlock_exit;
+	}
+
+	setsum->type = params->type;
+	setsum->socket_id = params->socket_id;
+	setsum->key_len = params->key_len;
+	setsum->num_target = params->num_target;
+	setsum->num_keys = params->num_keys;
+	setsum->name = params->name;
+	setsum->false_postive_rate = params->false_postive_rate;
+	setsum->prim_hash_seed = params->prim_hash_seed;
+	setsum->sec_hash_seed = params->sec_hash_seed;
+
+	switch (setsum->type) {
+		case SETSUM_TYPE_HT:
+			ret = rte_membership_create_ht(setsum);
+			break;
+		case SETSUM_TYPE_CACHE:
+			ret = rte_membership_create_cache(setsum);
+			break;
+		case SETSUM_TYPE_BF:
+			ret = rte_membership_create_bf(setsum);
+			break;
+		case SETSUM_TYPE_VBF:
+			ret = rte_membership_create_vbf(setsum);
+			break;
+		default:
+			goto error_unlock_exit;
+	}
+	if (ret < 0)
+		goto error_unlock_exit;
+
+	RTE_LOG(DEBUG, EFD, "Creating an setsummary table with mode %u\n",
+			setsum->type);
+
+	te->data = (void *)setsum;
+	TAILQ_INSERT_TAIL(membership_list, te, next);
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+	return setsum;
+
+error_unlock_exit:
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+	rte_membership_free(setsum);
+	return NULL;
+}
+
+
+int
+rte_membership_add(const void *ss, const void *key,
+		MEMBERSHIP_TARGET_TYPE target_id)
+{
+
+	const struct rte_membership_setsum *setsum = ss;
+
+	if (setsum == NULL || key == NULL)
+		return -EINVAL;
+	int ret = 0;
+	switch (setsum->type) {
+		case SETSUM_TYPE_HT:
+			ret = rte_membership_add_ht(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_CACHE:
+			ret = rte_membership_add_cache(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_BF:
+			ret = rte_membership_add_bf(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_VBF:
+			ret = rte_membership_add_vbf(setsum, key, target_id);
+			break;
+		default:
+			return -EINVAL;
+			break;
+	}
+	return ret;
+}
+
+
+int
+rte_membership_lookup(const void *ss, const void *key,
+		MEMBERSHIP_TARGET_TYPE *target_id)
+{
+	const struct rte_membership_setsum *setsum = ss;
+	if (setsum == NULL || key == NULL || target_id == NULL)
+		return -EINVAL;
+
+	int ret = 0;
+	switch (setsum->type) {
+		case SETSUM_TYPE_HT:
+			ret = rte_membership_lookup_ht(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_CACHE:
+			ret = rte_membership_lookup_cache(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_BF:
+			ret = rte_membership_lookup_bf(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_VBF:
+			ret = rte_membership_lookup_vbf(setsum, key, target_id);
+			break;
+		default:
+			return -EINVAL;
+			break;
+	}
+	return ret;
+}
+
+
+int
+rte_membership_lookup_bulk(const void *ss, const void **keys, uint32_t num_keys,
+		MEMBERSHIP_TARGET_TYPE *target_ids)
+{
+	const struct rte_membership_setsum *setsum = ss;
+	if (setsum == NULL || keys == NULL || target_ids == NULL)
+		return -EINVAL;
+
+	int ret = 0;
+	switch (setsum->type) {
+		case SETSUM_TYPE_HT:
+			ret = rte_membership_lookup_bulk_ht(setsum, keys, num_keys,
+					target_ids);
+			break;
+		case SETSUM_TYPE_CACHE:
+			ret = rte_membership_lookup_bulk_cache(setsum, keys, num_keys,
+					target_ids);
+			break;
+		case SETSUM_TYPE_BF:
+			ret = rte_membership_lookup_bulk_bf(setsum, keys, num_keys,
+					target_ids);
+			break;
+		case SETSUM_TYPE_VBF:
+			ret = rte_membership_lookup_bulk_vbf(setsum, keys, num_keys,
+					target_ids);
+			break;
+		default:
+			return -EINVAL;
+			break;
+	}
+	return ret;
+}
+
+int
+rte_membership_lookup_multi(const void *ss, const void *key,
+		MEMBERSHIP_TARGET_TYPE *target_id)
+{
+	const struct rte_membership_setsum *setsum = ss;
+	if (setsum == NULL || key == NULL || target_id == NULL)
+		return -EINVAL;
+	int ret=0;
+	switch (setsum->type) {
+		case SETSUM_TYPE_HT:
+			ret = rte_membership_lookup_multi_ht(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_CACHE:
+			ret = rte_membership_lookup_multi_cache(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_BF:
+			ret = rte_membership_lookup_multi_bf(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_VBF:
+			ret = rte_membership_lookup_multi_vbf(setsum, key, target_id);
+			break;
+		default:
+			return -EINVAL;
+			break;
+	}
+	return ret;
+}
+
+
+int
+rte_membership_lookup_multi_bulk(const void *ss, const void **keys,
+		uint32_t num_keys, uint32_t max_match_per_key, uint32_t *match_count,
+		MEMBERSHIP_TARGET_TYPE *target_ids)
+{
+	const struct rte_membership_setsum *setsum = ss;
+	if (setsum == NULL || keys == NULL || target_ids == NULL ||
+			match_count == NULL)
+		return -EINVAL;
+	int ret = 0;
+	switch (setsum->type) {
+		case SETSUM_TYPE_HT:
+			ret = rte_membership_lookup_multi_bulk_ht(setsum, keys, num_keys,
+					max_match_per_key, match_count, target_ids);
+			break;
+		case SETSUM_TYPE_CACHE:
+			ret = rte_membership_lookup_multi_bulk_cache(setsum, keys, num_keys,
+					max_match_per_key, match_count, target_ids);
+			break;
+		case SETSUM_TYPE_BF:
+			ret = rte_membership_lookup_multi_bulk_bf(setsum, keys, num_keys,
+					max_match_per_key, match_count, target_ids);
+			break;
+		case SETSUM_TYPE_VBF:
+			ret = rte_membership_lookup_multi_bulk_vbf(setsum, keys, num_keys,
+					max_match_per_key, match_count, target_ids);
+			break;
+		default:
+			return -EINVAL;
+			break;
+	}
+	return ret;
+}
+
+
+int
+rte_membership_delete(void *ss, const void *key,
+		MEMBERSHIP_TARGET_TYPE target_id)
+{
+	struct rte_membership_setsum *setsum = ss;
+	if (setsum == NULL || key == NULL)
+		return -EINVAL;
+	int ret = 0;
+	switch (setsum->type) {
+		case SETSUM_TYPE_HT:
+			ret = rte_membership_delete_ht(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_CACHE:
+			ret = rte_membership_delete_cache(setsum, key, target_id);
+			break;
+		case SETSUM_TYPE_BF:
+		case SETSUM_TYPE_VBF:
+		default:
+			return -EINVAL;
+			break;
+	}
+	return ret;
+}
+
+
+void
+rte_membership_reset(const void *ss)
+{
+	const struct rte_membership_setsum *setsum = ss;
+	if (setsum == NULL)
+		return;
+	switch (setsum->type) {
+		case SETSUM_TYPE_HT:
+			rte_membership_reset_ht(setsum);
+			break;
+		case SETSUM_TYPE_CACHE:
+			rte_membership_reset_cache(setsum);
+			break;
+		case SETSUM_TYPE_BF:
+			rte_membership_reset_bf(setsum);
+			break;
+		case SETSUM_TYPE_VBF:
+			rte_membership_reset_vbf(setsum);
+			break;
+		default:
+			break;
+	}
+}
\ No newline at end of file
diff --git a/lib/librte_membership/rte_membership.h b/lib/librte_membership/rte_membership.h
new file mode 100644
index 0000000..abe2c12
--- /dev/null
+++ b/lib/librte_membership/rte_membership.h
@@ -0,0 +1,321 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+
+/**
+ * @file
+ * RTE Membership Library
+ *
+ * The membership library provides structures serving as set summaries of sets.
+ * There are in total four modes are provided: bloom filter (BF), vector bloom
+ * filter (vBF), cache, and hash table-based (HT) modes.
+ *
+ * Each of the mode has different behaviors but they all can be used to test keys
+ * for their memberships of one or more sets. Detailed behavior of each mode
+ * please refer to the API document.
+ */
+
+
+
+#ifndef _RTE_MEMBERSHIP_H_
+#define _RTE_MEMBERSHIP_H_
+
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include <stdio.h>
+#include <stdint.h>
+#include <rte_jhash.h>
+
+/* The maximum set count is 2^16-1 (we reserve 0 for invalid target) */
+typedef uint16_t MEMBERSHIP_TARGET_TYPE;
+/* Invalid or empty set ID uses 0 */
+#define RTE_MEMBERSHIP_NO_MATCH 0
+#define RTE_MEMBERSHIP_LOOKUP_BULK_MAX 16
+#define MEMBERSHIP_MAX_PUSHES 100
+
+#define MEMBERSHIP_BUCKET_ENTRIES 16
+
+
+
+/* Maximum number of characters in setsum name. */
+#define RTE_MEMBERSHIP_NAMESIZE 32
+
+/* This bit is used to choose which bucket to replace entry */
+#define MEMBERSHIP_EVICT_CHOOSE (1 << MEMBERSHIP_BUCKET_ENTRIES)
+
+#define MEMBERSHIP_PRIM_HASH(key, key_len, seed) \
+	(uint32_t)(rte_jhash(key, key_len, seed))
+
+#define MEMBERSHIP_SEC_HASH(key, key_len, seed) \
+	(uint32_t)(rte_jhash(key, key_len, seed))
+
+
+typedef uint16_t SIG_TYPE;				/* signature size is 16 bit */
+#define SIG_BITMASK 0xffff				/* signature mask, 16 bit */
+
+struct rte_membership_setsum;
+struct rte_membership_parameters;
+
+
+/* All different  types of set summaries */
+enum rte_membership_setsum_type {
+	SETSUM_TYPE_HT = 0,
+	SETSUM_TYPE_CACHE,
+	SETSUM_TYPE_BF,
+	SETSUM_TYPE_VBF
+};
+
+
+
+struct rte_membership_setsum {
+	enum rte_membership_setsum_type type;
+	const char *name;
+	uint32_t key_len;
+	/* cache is only relevant to HT based set summary */
+	uint32_t num_keys;
+	/* num_target and false_postive_rate only relevant to BF based set summary */
+	uint32_t num_target;
+	float false_postive_rate;
+
+	uint32_t prim_hash_seed;
+	uint32_t sec_hash_seed;
+
+	int socket_id;
+
+	void *ss;
+};
+
+
+/**
+ * Parameters used when creating the set summary table.
+ */
+struct rte_membership_parameters {
+	const char *name;       /* Name of the hash. */
+	enum rte_membership_setsum_type type;
+	uint32_t num_keys;       /* Total hash table entries. */
+	uint32_t key_len;       /* Length of hash key. */
+
+	/* num_target and false_postive_rate only relevant with BF based set summary */
+	uint32_t num_target;
+	float false_postive_rate;
+
+	uint32_t prim_hash_seed;
+	uint32_t sec_hash_seed;
+
+	int socket_id;          /* NUMA Socket ID for memory. */
+};
+
+
+
+/**
+ * Create setsummary (SS) table
+ *
+ * @param params
+ *   parameters to initialize the setsummary.
+ * @return
+ *   return the pointer to the setsummary.
+ *   return value is NULL if the creation failed.
+ */
+
+void *
+rte_membership_create(const struct rte_membership_parameters *params);
+
+
+
+/**
+ * Lookup key in setsummary (SS) table
+ * Single key lookup and return as soon as the first match found
+ * @param setsum
+ *   pointer of a setsummary table
+ * @param key
+ *   pointer of the key that needs to lookup
+ * @param target_id
+ *   returned target set id.
+ * @return
+ *   return 1 for found a match and 0 for not found a match
+ */
+
+int
+rte_membership_lookup(const void *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id);
+
+
+/**
+ * lookup bulk of keys in setsummary (SS) table
+ * Each key lookup returns as soon as the first match found
+ * @param setsum
+ *   Pointer of a setsummary table
+ * @param keys
+ *   Pointer of bulk of keys that to be lookup
+ * @param num_keys
+ *   Number of keys that will be lookup
+ * @param target_ids
+ *   Return target ids for all the keys to the array.
+ *   User should preallocate array that can contain the maximum possible number
+ *   of matches.
+ * @return
+ *   The number of keys that find a match.
+ */
+
+
+int
+rte_membership_lookup_bulk(const void *setsum,
+		const void **keys, uint32_t num_keys, MEMBERSHIP_TARGET_TYPE *target_ids);
+
+
+
+
+/**
+ * Lookup a key in setsummary (SS) table for multiple matches
+ * The key lookup will find all matched entries (multiple match)
+ * This is for VBF and HT modes of setsummaries.
+ * @param setsum
+ *   pointer of a setsummary struct
+ * @param key
+ *   The key that to be lookup
+ * @param target_id
+ *   returned target ids for all the matches of the key
+ * @return
+ *   The number of matches that found for the key.
+ *   For BF and Cache mode, the number should be at most 1
+ */
+
+int
+rte_membership_lookup_multi(const void *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id);
+
+
+
+
+/**
+ * Lookup a bulk of keys in setsummary (SS) table for multiple matches
+ * Each key lookup will find all matched entries (multiple match)
+ * This is for VBF and HT type of setsummaries.
+ * @param setsum
+ *   pointer of a setsummary struct
+ * @param keys
+ *   The keys that to be lookup
+ * @param num_keys
+ *   The number of keys that will be lookup
+ * @param max_match_per_key
+ *   The possible max number of matches for each key.
+ * @param match_count
+ *   The number of match for all the keys.
+ * @param target_ids
+ *   Return target ids for all the matches of all keys
+ * @return
+ *   The number of keys that find one or more matches in the table.
+ */
+
+int
+rte_membership_lookup_multi_bulk(const void *setsum,
+		const void **keys, uint32_t num_keys, uint32_t max_match_per_key,
+		uint32_t *match_count,
+		MEMBERSHIP_TARGET_TYPE *target_ids);
+
+/**
+ * Insert key to setsummary (SS) table
+ *
+ * @param setsum
+ *   pointer of a setsummary table
+ * @param key
+ *   the key that needs to be added
+ * @param target_id
+ *   The target id associated with the key that needs to be added.
+ *   Note that for BF mode the target id should no larger than 1.
+ * @return
+ *   Return error code if fail.
+ *   For success we return different value for different mode for providing
+ *   extra information for the users.
+ *   Return 0 for BF. Return 0 for Cache mode if the add does not cause
+ *   eviction, return 1 otherwise. Return the index of the inserted entry of the
+ *   bucket for HT mode. Return 0 for vBF mode.
+ */
+
+int
+rte_membership_add(const void *setsum, const void *key,
+		MEMBERSHIP_TARGET_TYPE target_id);
+
+
+/**
+ * De-allocate all memory used by set summary table
+ * @param setsum
+ *   Pointer to the set summary
+ */
+void
+rte_membership_free(void *setsum);
+
+
+
+/**
+ * Reset the setsummary tables. E.g. reset bits to be 0 in BF,
+ * reset target_id in each entry to be no_match
+ * @param setsum
+ *   Pointer to the set summary
+ */
+void
+rte_membership_reset(const void *setsum);
+
+
+
+
+/**
+ * Detele items from the set summary
+ * @param setsum
+ *   Pointer to the set summary.
+ * @param key
+ *   The key to be deleted.
+ * @param target_id
+ *   For HT or VBF type of setsummary, we pass this argument to only delete
+ *   keys with certain target_id.
+ * @return
+ *   If no entry found to delete, an error code could be returned.
+ */
+
+int
+rte_membership_delete(void *setsum, const void *key,
+		MEMBERSHIP_TARGET_TYPE target_id);
+
+
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_MEMBERSHIP_H_ */
\ No newline at end of file
diff --git a/lib/librte_membership/rte_membership_bf.c b/lib/librte_membership/rte_membership_bf.c
new file mode 100644
index 0000000..bf3de11
--- /dev/null
+++ b/lib/librte_membership/rte_membership_bf.c
@@ -0,0 +1,254 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) 2012, Jyri J. Virkki
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions are
+ *   met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+/*
+ *Some of the code is modified from Jyri's libbloom library
+ *(https://github.com/jvirkki/libbloom) which is under BSD license
+ */
+
+#include "rte_membership.h"
+#include "rte_membership_bf.h"
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+
+#include <rte_bitmap.h>
+#include <rte_malloc.h>
+#include <rte_memory.h>
+
+
+
+struct rte_membership_bf *
+__membership_create_bf(const struct rte_membership_setsum *ss)
+{
+
+	struct rte_membership_bf *bloom;
+	double num;
+	double denom = 0.480453013918201;							/* ln(2)^2 */
+	double dentries;
+	uint32_t bmp_mem_size;
+
+
+	if (ss->num_keys < 1 || ss->false_postive_rate == 0) {
+		return NULL;
+	}
+	bloom = rte_zmalloc_socket(NULL, sizeof(struct rte_membership_bf),
+			RTE_CACHE_LINE_SIZE, ss->socket_id);
+	if (bloom == NULL) {
+		RTE_LOG(ERR, EAL, "Bitmap init error\n");
+		return NULL;
+	}
+	bloom->entries = ss->num_keys;
+	bloom->error = ss->false_postive_rate;
+	num = log(bloom->error);
+
+	bloom->bpe = -(num / denom);
+
+	dentries = (double)(bloom->entries);
+	bloom->bits = rte_align32pow2((int)(dentries * bloom->bpe));
+	bloom->bucket_bitmask = bloom->bits - 1;
+
+	bloom->num_hashes = (int)ceil(0.693147180559945 * bloom->bpe);  /* ln(2) */
+
+	bmp_mem_size = rte_bitmap_get_memory_footprint(bloom->bits);
+
+	bloom->bmp_array = rte_zmalloc(NULL, bmp_mem_size, RTE_CACHE_LINE_SIZE);
+	if (bloom->bmp_array == NULL) {
+		rte_free(bloom);
+		return NULL;
+	}
+
+	bloom->bmp = rte_bitmap_init(bloom->bits, bloom->bmp_array, bmp_mem_size);
+	if (bloom->bmp == NULL) {
+		RTE_LOG(ERR, EAL, "Bitmap init error\n");
+		rte_free(bloom->bmp_array);
+		rte_free(bloom);
+		return NULL;
+	}
+	return bloom;
+}
+
+
+
+int
+rte_membership_create_bf(struct rte_membership_setsum *setsum)
+{
+	struct rte_membership_bf *bloom =
+		__membership_create_bf((const struct rte_membership_setsum *)setsum);
+
+	if(bloom != NULL)
+		setsum->ss = bloom;
+	else
+		return -ENOMEM;
+	return 0;
+}
+
+
+int
+rte_membership_lookup_bf(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id)
+{
+	struct rte_membership_bf *bloom = setsum->ss;
+	uint32_t key_len = setsum->key_len;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t a = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed);
+	uint32_t b = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	uint32_t x;
+	uint32_t i;
+
+	struct rte_bitmap *bmp = bloom->bmp;
+
+	for (i = 0; i < bloom->num_hashes; i++) {
+		x = (a + i*b) & bloom->bucket_bitmask;
+		if (rte_bitmap_get(bmp, x) == 0) {
+			return 0;
+		}
+	}
+	*target_id = 1;
+	return 1;
+}
+
+
+int
+rte_membership_lookup_multi_bf(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id)
+{
+	int ret = rte_membership_lookup_bf(setsum, key, target_id);
+	return ret;
+}
+
+
+int
+rte_membership_lookup_bulk_bf(const struct rte_membership_setsum* setsum,
+		const void** keys, uint32_t num_keys, MEMBERSHIP_TARGET_TYPE* target_id)
+{
+	struct rte_membership_bf* bloom = setsum->ss;
+	uint32_t key_len = setsum->key_len;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+
+	uint32_t i, j;
+	uint32_t x, a, b;
+	int ret = 0;
+	struct rte_bitmap *bmp = bloom->bmp;
+	for (i = 0; i < num_keys; i++) {
+		a = MEMBERSHIP_PRIM_HASH(keys[i], key_len, prim_hash_seed);
+		b = MEMBERSHIP_SEC_HASH(keys[i], key_len, sec_hash_seed);
+		for (j = 0; j < bloom->num_hashes; j++) {
+			x = (a + j * b) & bloom->bucket_bitmask;
+			if (rte_bitmap_get(bmp, x) == 0) {
+				target_id[i] = RTE_MEMBERSHIP_NO_MATCH;
+				break;
+			}
+		}
+		if (j == bloom->num_hashes) {
+			target_id[i] = 1;
+			ret++;
+		}
+	}
+	return ret;
+}
+
+int
+rte_membership_lookup_multi_bulk_bf(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, uint32_t match_per_key,
+		uint32_t *match_count, MEMBERSHIP_TARGET_TYPE *target_ids)
+{
+
+	int ret;
+	uint32_t i;
+	MEMBERSHIP_TARGET_TYPE target_id[num_keys];
+	ret = rte_membership_lookup_bulk_bf(setsum, keys, num_keys, target_id);
+	for (i = 0; i < num_keys; i++) {
+		if (target_id[i] != RTE_MEMBERSHIP_NO_MATCH) {
+			match_count[i] = 1;
+			target_ids[i*match_per_key]= target_id[i];
+		}
+		else {
+			match_count[i] = 0;
+		}
+	}
+	return ret;
+}
+
+int
+rte_membership_add_bf(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE target_id)
+{
+	/* bloomfilter only allows 1 bit target, hit or not since only 1 set */
+	if (target_id > 1)
+		return -EINVAL;
+	struct rte_membership_bf *bloom = setsum->ss;
+	uint32_t key_len = setsum->key_len;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t a = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed);
+	uint32_t b = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	uint32_t x;
+	uint32_t i;
+
+	struct rte_bitmap *bmp = bloom->bmp;
+
+	for (i = 0; i < bloom->num_hashes; i++) {
+		x = (a + i * b) & bloom->bucket_bitmask;
+		rte_bitmap_set(bmp, x);
+	}
+	return 0;
+}
+
+
+void
+rte_membership_free_bf(struct rte_membership_setsum *setsum)
+{
+	struct rte_membership_bf *bloom = setsum->ss;
+	if (bloom != NULL) {
+		rte_free(bloom->bmp_array);
+		rte_free(bloom);
+	}
+}
+
+
+void
+rte_membership_reset_bf(const struct rte_membership_setsum *setsum)
+{
+	struct rte_membership_bf *bloom = setsum->ss;
+	if (bloom != NULL) {
+		rte_bitmap_reset(bloom->bmp_array);
+	}
+
+}
\ No newline at end of file
diff --git a/lib/librte_membership/rte_membership_bf.h b/lib/librte_membership/rte_membership_bf.h
new file mode 100644
index 0000000..fdafd0d
--- /dev/null
+++ b/lib/librte_membership/rte_membership_bf.h
@@ -0,0 +1,99 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_MEMBERSHIP_BF_H_
+#define _RTE_MEMBERSHIP_BF_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rte_bitmap.h>
+
+struct rte_membership_bf
+{
+	int entries;		/* number of entries expected to store in filter */
+	double error;		/* expected false positive rate */
+	double bpe;			/* theoretical bit per entry */
+	unsigned bits;		/* actual number of bits allocated (rounded to 2pow) */
+	unsigned num_hashes;	/* number of hash functions needed (optimal) */
+
+	unsigned bucket_bitmask;
+
+	void *bmp_array;	/* memory chunk holding bmp */
+	struct rte_bitmap *bmp;
+};
+
+
+struct rte_membership_bf *
+__membership_create_bf(const struct rte_membership_setsum *ss);
+
+int
+rte_membership_create_bf(struct rte_membership_setsum *ss);
+
+int
+rte_membership_lookup_bf(const struct rte_membership_setsum *setsum,
+						const void *key, MEMBERSHIP_TARGET_TYPE* target_id);
+
+int
+rte_membership_lookup_multi_bf(const struct rte_membership_setsum *setsum,
+						const void *key, MEMBERSHIP_TARGET_TYPE *target_id);
+
+
+int
+rte_membership_lookup_bulk_bf(const struct rte_membership_setsum *setsum,
+		const void **key, uint32_t num_keys, MEMBERSHIP_TARGET_TYPE *target_id);
+
+
+int
+rte_membership_lookup_multi_bulk_bf(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, uint32_t match_per_key,
+		uint32_t *match_count,
+		MEMBERSHIP_TARGET_TYPE *target_ids);
+
+int
+rte_membership_add_bf(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE target_id);
+
+
+void
+rte_membership_free_bf(struct rte_membership_setsum *ss);
+
+
+void
+rte_membership_reset_bf(const struct rte_membership_setsum *setsum);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RTE_MEMBERSHIP_BF_H_ */
diff --git a/lib/librte_membership/rte_membership_cache.c b/lib/librte_membership/rte_membership_cache.c
new file mode 100644
index 0000000..f048bca
--- /dev/null
+++ b/lib/librte_membership/rte_membership_cache.c
@@ -0,0 +1,345 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "rte_membership.h"
+#include "rte_membership_cache.h"
+
+#include <rte_errno.h>
+#include <rte_malloc.h>
+#include <rte_prefetch.h>
+#include <rte_random.h>
+
+
+/* The bucket struct for cuckoo distributor*/
+struct membership_cache_bucket {
+	SIG_TYPE sigs[MEMBERSHIP_BUCKET_ENTRIES]; 			 	/*2-byte signature*/
+	MEMBERSHIP_TARGET_TYPE targets[MEMBERSHIP_BUCKET_ENTRIES];/*2-byte target*/
+} __attribute__ ((packed));
+
+
+struct membership_cache_ss {
+	struct membership_cache_bucket* buckets; 				/*buckets array*/
+	uint32_t bucket_cnt;
+	uint32_t bucket_mask;
+};
+
+
+
+int
+rte_membership_create_cache(struct rte_membership_setsum *ss){
+	uint32_t i, j;
+	const uint32_t num_buckets = rte_align32pow2(ss->num_keys) /
+			MEMBERSHIP_BUCKET_ENTRIES;
+	struct membership_cache_ss* t;
+
+	t = (struct membership_cache_ss *)rte_zmalloc_socket(NULL,
+			sizeof(struct membership_cache_ss),
+									RTE_CACHE_LINE_SIZE, ss->socket_id);
+
+
+	struct membership_cache_bucket* buckets = rte_zmalloc_socket(NULL,
+			num_buckets * sizeof(struct membership_cache_bucket),
+			RTE_CACHE_LINE_SIZE, ss->socket_id);
+
+	t->buckets = buckets;
+	t->bucket_cnt=num_buckets;
+	t->bucket_mask = num_buckets - 1;
+	ss->ss = t;
+
+	for( i=0; i<num_buckets; i++){
+		for( j=0; j<MEMBERSHIP_BUCKET_ENTRIES; j++){
+			buckets[i].targets[j]=RTE_MEMBERSHIP_NO_MATCH;
+		}
+	}
+	return 0;
+}
+
+
+int
+rte_membership_lookup_cache(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id)
+{
+
+	int32_t i;
+	struct membership_cache_ss* ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_cache_bucket* buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+
+	SIG_TYPE tmp_sig = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed) &
+			SIG_BITMASK;
+
+	uint32_t hash_val = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	uint32_t prim_bucket = hash_val & bucket_mask;
+	uint32_t sec_bucket =  (hash_val >> 16) & bucket_mask;
+
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if(tmp_sig == buckets[prim_bucket].sigs[i] &&
+				buckets[prim_bucket].targets[i] != RTE_MEMBERSHIP_NO_MATCH) {
+			*target_id = buckets[prim_bucket].targets[i];
+			return 1;
+		}
+	}
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if(tmp_sig == buckets[sec_bucket].sigs[i] &&
+				buckets[sec_bucket].targets[i] != RTE_MEMBERSHIP_NO_MATCH) {
+			*target_id = buckets[sec_bucket].targets[i];
+			return 1;
+		}
+	}
+	return 0;
+}
+
+int
+rte_membership_lookup_multi_cache(const struct rte_membership_setsum* setsum,
+		const void* key, MEMBERSHIP_TARGET_TYPE* target_id)
+{
+
+	int ret = rte_membership_lookup_cache(setsum, key, target_id);
+	return ret;
+}
+
+
+
+
+int
+rte_membership_lookup_bulk_cache(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, MEMBERSHIP_TARGET_TYPE *target_id)
+{
+	uint32_t i,j;
+	int ret = 0;
+	struct membership_cache_ss* ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_cache_bucket* buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+	SIG_TYPE tmp_sig[RTE_MEMBERSHIP_LOOKUP_BULK_MAX];
+	const struct membership_cache_bucket*
+			prim_buckets[RTE_MEMBERSHIP_LOOKUP_BULK_MAX];
+	const struct membership_cache_bucket*
+			sec_buckets[RTE_MEMBERSHIP_LOOKUP_BULK_MAX];
+
+	for( i=0; i<num_keys; i++){
+		tmp_sig[i] = MEMBERSHIP_PRIM_HASH(keys[i], key_len, prim_hash_seed) &
+				SIG_BITMASK;
+		uint32_t hash_val = MEMBERSHIP_SEC_HASH(keys[i], key_len, sec_hash_seed);
+		uint32_t prim_bucket = hash_val & bucket_mask;
+		uint32_t sec_bucket =  (hash_val >> 16) & bucket_mask;
+		prim_buckets[i] = &buckets[prim_bucket];
+		sec_buckets[i] = &buckets[sec_bucket];
+		rte_prefetch0(prim_buckets[i]);
+		rte_prefetch0(sec_buckets[i]);
+	}
+
+
+	for (i = 0; i < num_keys; i++ ) {
+		for (j = 0; j < MEMBERSHIP_BUCKET_ENTRIES; j++) {
+			if(tmp_sig[i] == prim_buckets[i]->sigs[j] &&
+					prim_buckets[i]->targets[j] != RTE_MEMBERSHIP_NO_MATCH) {
+				target_id[i] = prim_buckets[i]->targets[j];
+				ret++;
+				break;
+			}
+		}
+
+		if (j == MEMBERSHIP_BUCKET_ENTRIES) {
+			for (j = 0; j < MEMBERSHIP_BUCKET_ENTRIES; j++) {
+				if(tmp_sig[i] == sec_buckets[i]->sigs[j] &&
+						sec_buckets[i]->targets[j] != RTE_MEMBERSHIP_NO_MATCH) {
+					target_id[i] = sec_buckets[i]->targets[j];
+					ret++;
+					break;
+				}
+			}
+		}
+		if (j == MEMBERSHIP_BUCKET_ENTRIES) {
+			target_id[i] = RTE_MEMBERSHIP_NO_MATCH;
+		}
+	}
+	return ret;
+}
+
+
+int
+rte_membership_lookup_multi_bulk_cache(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, uint32_t match_per_key,
+		uint32_t *match_count, MEMBERSHIP_TARGET_TYPE *target_ids)
+{
+	int ret;
+	uint32_t i;
+	MEMBERSHIP_TARGET_TYPE target_id[num_keys];
+	ret = rte_membership_lookup_bulk_cache(setsum, keys, num_keys, target_id);
+	for (i = 0; i < num_keys; i++) {
+		if (target_id[i] != RTE_MEMBERSHIP_NO_MATCH) {
+			match_count[i] = 1;
+			target_ids[i*match_per_key] = target_id[i];
+		}
+		else {
+			match_count[i] = 0;
+		}
+	}
+	return ret;
+}
+
+
+
+int
+rte_membership_add_cache(const struct rte_membership_setsum *setsum,
+							const void *key, MEMBERSHIP_TARGET_TYPE target_id)
+{
+	int i;
+	struct membership_cache_ss* ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_cache_bucket* buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+	SIG_TYPE tmp_sig = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed) &
+			SIG_BITMASK;
+
+	uint32_t hash_val = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	uint32_t prim_bucket = hash_val & bucket_mask;
+	uint32_t sec_bucket =  (hash_val >> 16) & bucket_mask;
+
+	/* Check if the signature already in the two buckets */
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if (buckets[prim_bucket].sigs[i] == tmp_sig) {
+			buckets[prim_bucket].targets[i] = target_id;
+			return 0;
+		}
+		if (buckets[sec_bucket].sigs[i] == tmp_sig) {
+			buckets[sec_bucket].targets[i] = target_id;
+			return 0;
+		}
+	}
+
+
+	/* If not then insert into one slot (prefer empty slot) */
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if(buckets[prim_bucket].targets[i] == RTE_MEMBERSHIP_NO_MATCH){
+			buckets[prim_bucket].sigs[i] = tmp_sig;
+			buckets[prim_bucket].targets[i] = target_id;
+			return 0;
+		}
+	}
+
+	/* Primary location full */
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if(buckets[sec_bucket].targets[i] == RTE_MEMBERSHIP_NO_MATCH){
+			buckets[sec_bucket].sigs[i] = tmp_sig;
+			buckets[sec_bucket].targets[i] = target_id;
+			return 0;
+		}
+	}
+
+	/* Then we should evict someone. */
+	/* currently it is a random eviction policy */
+
+	uint64_t random = rte_rand();
+	uint32_t evict_idx = random & (MEMBERSHIP_BUCKET_ENTRIES-1);
+	uint32_t bucket_choose = prim_bucket;
+
+	if (random & MEMBERSHIP_EVICT_CHOOSE) {
+		bucket_choose = sec_bucket;
+	}
+
+	buckets[bucket_choose].sigs[evict_idx] = tmp_sig;
+	buckets[bucket_choose].targets[evict_idx] = target_id;
+	return 1;
+}
+
+
+void
+rte_membership_free_cache(struct rte_membership_setsum* setsum){
+	rte_free(setsum->ss);
+}
+
+
+int
+rte_membership_delete_cache(struct rte_membership_setsum* setsum,
+		const void* key, MEMBERSHIP_TARGET_TYPE target_id)
+{
+	(void)target_id;
+	int i;
+	struct membership_cache_ss* ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_cache_bucket* buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+	SIG_TYPE tmp_sig = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed) &
+			SIG_BITMASK;
+
+
+	uint32_t hash_val = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	uint32_t prim_bucket = hash_val & bucket_mask;
+	uint32_t sec_bucket =  (prim_bucket ^ tmp_sig) & bucket_mask;
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if(tmp_sig == buckets[prim_bucket].sigs[i]) {
+			buckets[prim_bucket].targets[i] = RTE_MEMBERSHIP_NO_MATCH;
+			return 0;
+		}
+	}
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if (tmp_sig == buckets[sec_bucket].sigs[i]) {
+			buckets[sec_bucket].targets[i] = RTE_MEMBERSHIP_NO_MATCH;
+			return 0;
+		}
+	}
+	return -ENOENT;
+}
+
+void
+rte_membership_reset_cache(const struct rte_membership_setsum *setsum)
+{
+	uint32_t i, j;
+	struct membership_cache_ss* ht = setsum->ss;
+	/* FIXME: low efficient */
+	for (i=0; i<ht->bucket_cnt; i++) {
+		for (j=0; j<MEMBERSHIP_BUCKET_ENTRIES; j++) {
+			ht->buckets[i].targets[j]=RTE_MEMBERSHIP_NO_MATCH;
+		}
+	}
+}
\ No newline at end of file
diff --git a/lib/librte_membership/rte_membership_cache.h b/lib/librte_membership/rte_membership_cache.h
new file mode 100644
index 0000000..8e262ff
--- /dev/null
+++ b/lib/librte_membership/rte_membership_cache.h
@@ -0,0 +1,95 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_MEMBERSHIP_CACHE_H_
+#define _RTE_MEMBERSHIP_CACHE_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int
+rte_membership_create_cache(struct rte_membership_setsum* ss);
+
+
+int
+rte_membership_lookup_cache(const struct rte_membership_setsum* setsum,
+		const void* key, MEMBERSHIP_TARGET_TYPE* target_id);
+
+
+int
+rte_membership_lookup_multi_cache(const struct rte_membership_setsum* setsum,
+		const void* key, MEMBERSHIP_TARGET_TYPE* target_id);
+
+
+int
+rte_membership_lookup_bulk_cache(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys,
+		MEMBERSHIP_TARGET_TYPE* target_ids);
+
+
+
+int
+rte_membership_lookup_multi_bulk_cache(const struct rte_membership_setsum* setsum,
+		const void **keys, uint32_t num_keys, uint32_t match_per_key,
+		uint32_t *match_count, MEMBERSHIP_TARGET_TYPE *target_ids);
+
+
+
+int
+rte_membership_add_cache(const struct rte_membership_setsum* setsum,
+		const void* key, MEMBERSHIP_TARGET_TYPE target_id);
+
+void
+rte_membership_free_cache(struct rte_membership_setsum* setsum);
+
+
+
+
+int
+rte_membership_delete_cache(struct rte_membership_setsum* ss, const void* key,
+		MEMBERSHIP_TARGET_TYPE target_id);
+
+
+
+void
+rte_membership_reset_cache(const struct rte_membership_setsum *setsum);
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _RTE_MEMBERSHIP_CACHE_H_ */
diff --git a/lib/librte_membership/rte_membership_ht.c b/lib/librte_membership/rte_membership_ht.c
new file mode 100644
index 0000000..980374f
--- /dev/null
+++ b/lib/librte_membership/rte_membership_ht.c
@@ -0,0 +1,471 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "rte_membership.h"
+#include "rte_membership_ht.h"
+
+#include <rte_errno.h>
+#include <rte_malloc.h>
+#include <rte_prefetch.h>
+
+
+/* The bucket struct for ht setsum */
+struct membership_ht_bucket {
+	SIG_TYPE sigs[MEMBERSHIP_BUCKET_ENTRIES]; 			 /* 2-byte signature */
+	uint8_t flags[MEMBERSHIP_BUCKET_ENTRIES];
+	MEMBERSHIP_TARGET_TYPE targets[MEMBERSHIP_BUCKET_ENTRIES];/* 2-byte target */
+} __attribute__ ((packed));
+
+
+struct membership_ht_ss {
+	struct membership_ht_bucket* buckets; 					/* buckets array */
+	uint32_t bucket_cnt;
+	uint32_t bucket_mask;
+
+};
+
+
+int
+rte_membership_create_ht(struct rte_membership_setsum *ss){
+	uint32_t i, j;
+	const uint32_t num_buckets = rte_align32pow2(ss->num_keys) /
+			MEMBERSHIP_BUCKET_ENTRIES;
+	struct membership_ht_ss *t;
+
+	t = (struct membership_ht_ss *)rte_zmalloc_socket(NULL,
+			sizeof(struct membership_ht_ss),
+			RTE_CACHE_LINE_SIZE, ss->socket_id);
+
+
+	struct membership_ht_bucket* buckets = rte_zmalloc_socket(NULL,
+			num_buckets * sizeof(struct membership_ht_bucket),
+			RTE_CACHE_LINE_SIZE, ss->socket_id);
+
+	t->buckets = buckets;
+	t->bucket_cnt = num_buckets;
+	t->bucket_mask = num_buckets - 1;
+
+	ss->ss = t;
+
+	for (i=0; i<num_buckets; i++) {
+		for (j=0; j<MEMBERSHIP_BUCKET_ENTRIES; j++) {
+			buckets[i].targets[j]=RTE_MEMBERSHIP_NO_MATCH;
+		}
+	}
+	return 0;
+}
+
+
+int
+rte_membership_lookup_multi_ht(const struct rte_membership_setsum* setsum,
+							const void* key, MEMBERSHIP_TARGET_TYPE* target_id)
+{
+
+	int32_t i;
+	int ret = 0;
+	struct membership_ht_ss* ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_ht_bucket* buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+
+	SIG_TYPE tmp_sig = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed) &
+			SIG_BITMASK;
+
+	uint32_t hash_val = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	uint32_t prim_bucket = hash_val & bucket_mask;
+	uint32_t sec_bucket =  (prim_bucket ^ tmp_sig) & bucket_mask;
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if (tmp_sig == buckets[prim_bucket].sigs[i] &&
+				buckets[prim_bucket].targets[i] != RTE_MEMBERSHIP_NO_MATCH) {
+			target_id[ret] = buckets[prim_bucket].targets[i];
+			ret++;
+		}
+	}
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if (tmp_sig == buckets[sec_bucket].sigs[i] &&
+				buckets[sec_bucket].targets[i] != RTE_MEMBERSHIP_NO_MATCH) {
+			target_id[ret] = buckets[sec_bucket].targets[i];
+			ret++;
+		}
+	}
+	return ret;
+}
+
+int
+rte_membership_lookup_multi_bulk_ht(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, uint32_t match_per_key,
+		uint32_t *match_count,
+		MEMBERSHIP_TARGET_TYPE *target_ids)
+{
+	uint32_t i,j;
+	int ret = 0;
+	struct membership_ht_ss *ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_ht_bucket* buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+	SIG_TYPE tmp_sig[RTE_MEMBERSHIP_LOOKUP_BULK_MAX] = {0};
+	const struct membership_ht_bucket*
+						prim_buckets[RTE_MEMBERSHIP_LOOKUP_BULK_MAX] = {0};
+	const struct membership_ht_bucket*
+						sec_buckets[RTE_MEMBERSHIP_LOOKUP_BULK_MAX] = {0};
+
+	for (i=0; i<num_keys; i++) {
+		tmp_sig[i] = MEMBERSHIP_PRIM_HASH(keys[i], key_len, prim_hash_seed) &
+				SIG_BITMASK;
+		uint32_t hash_val = MEMBERSHIP_SEC_HASH(keys[i], key_len, sec_hash_seed);
+		uint32_t prim_bucket = hash_val & bucket_mask;
+		uint32_t sec_bucket =  (prim_bucket ^ tmp_sig[i]) & bucket_mask;
+		prim_buckets[i] = &buckets[prim_bucket];
+		sec_buckets[i] = &buckets[sec_bucket];
+		rte_prefetch0(prim_buckets[i]);
+		rte_prefetch0(sec_buckets[i]);
+	}
+
+	for (j = 0; j < num_keys; j++) {
+		uint32_t match_cnt = 0;
+		for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++){
+			if(tmp_sig[j] == prim_buckets[j]->sigs[i] &&
+					prim_buckets[j]->targets[i] != RTE_MEMBERSHIP_NO_MATCH){
+				if (match_cnt >= match_per_key)
+					break;
+				target_ids[j*match_per_key+match_cnt] = prim_buckets[j]->targets[i];
+				match_cnt++;
+			}
+		}
+		for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+			if (tmp_sig[j] == sec_buckets[j]->sigs[i] &&
+					sec_buckets[j]->targets[i] != RTE_MEMBERSHIP_NO_MATCH) {
+				if (match_cnt >= match_per_key)
+					break;
+				target_ids[j*match_per_key+match_cnt] = sec_buckets[j]->targets[i];
+				match_cnt++;
+			}
+		}
+		match_count[j] = match_cnt;
+		if (match_cnt != 0)
+			ret++;
+	}
+	return ret;
+}
+
+int
+rte_membership_lookup_ht(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id)
+{
+
+	int32_t i;
+	struct membership_ht_ss* ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_ht_bucket* buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+
+	SIG_TYPE tmp_sig = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed) &
+			SIG_BITMASK;
+
+	uint32_t hash_val = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	uint32_t prim_bucket = hash_val & bucket_mask;
+	uint32_t sec_bucket =  (prim_bucket ^ tmp_sig) & bucket_mask;
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if (tmp_sig == buckets[prim_bucket].sigs[i] &&
+				buckets[prim_bucket].targets[i] != RTE_MEMBERSHIP_NO_MATCH) {
+			*target_id = buckets[prim_bucket].targets[i];
+			return 1;
+		}
+	}
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if (tmp_sig == buckets[sec_bucket].sigs[i] &&
+					buckets[sec_bucket].targets[i] != RTE_MEMBERSHIP_NO_MATCH) {
+			*target_id = buckets[sec_bucket].targets[i];
+			return 1;
+		}
+	}
+	return 0;
+}
+
+int
+rte_membership_lookup_bulk_ht(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, MEMBERSHIP_TARGET_TYPE *target_id)
+{
+	uint32_t i,j;
+	int ret = 0;
+	struct membership_ht_ss* ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_ht_bucket* buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+	SIG_TYPE tmp_sig[RTE_MEMBERSHIP_LOOKUP_BULK_MAX] = {0};
+	const struct membership_ht_bucket*
+			prim_buckets[RTE_MEMBERSHIP_LOOKUP_BULK_MAX] = {0};
+	const struct membership_ht_bucket*
+			sec_buckets[RTE_MEMBERSHIP_LOOKUP_BULK_MAX] = {0};
+
+	for (i = 0; i < num_keys; i++) {
+		tmp_sig[i] = MEMBERSHIP_PRIM_HASH(keys[i], key_len, prim_hash_seed) &
+				SIG_BITMASK;
+		uint32_t hash_val = MEMBERSHIP_SEC_HASH(keys[i], key_len, sec_hash_seed);
+		uint32_t prim_bucket = hash_val & bucket_mask;
+		uint32_t sec_bucket =  (prim_bucket ^ tmp_sig[i]) & bucket_mask;
+		prim_buckets[i] = &buckets[prim_bucket];
+		sec_buckets[i] = &buckets[sec_bucket];
+		rte_prefetch0(prim_buckets[i]);
+		rte_prefetch0(sec_buckets[i]);
+	}
+
+	for (i = 0; i < num_keys; i++) {
+		for (j = 0; j < MEMBERSHIP_BUCKET_ENTRIES; j++) {
+			if(tmp_sig[i] == prim_buckets[i]->sigs[j] &&
+					prim_buckets[i]->targets[j] != RTE_MEMBERSHIP_NO_MATCH) {
+				target_id[i] = prim_buckets[i]->targets[j];
+				ret++;
+				break;
+			}
+		}
+
+		if (j == MEMBERSHIP_BUCKET_ENTRIES) {
+			for (j = 0; j < MEMBERSHIP_BUCKET_ENTRIES; j++) {
+				if(tmp_sig[i] == sec_buckets[i]->sigs[j] &&
+						sec_buckets[i]->targets[j] != RTE_MEMBERSHIP_NO_MATCH) {
+					target_id[i]= sec_buckets[i]->targets[j];
+					ret++;
+					break;
+				}
+			}
+		}
+
+		if (j == MEMBERSHIP_BUCKET_ENTRIES) {
+			target_id[i] = RTE_MEMBERSHIP_NO_MATCH;
+		}
+	}
+	return ret;
+}
+
+
+
+/* Search for an entry that can be pushed to its alternative location */
+static inline int
+make_space_bucket(const struct rte_membership_setsum *setsum, uint32_t bkt_num)
+{
+	static unsigned int nr_pushes;
+	unsigned i, j;
+	int ret;
+	uint32_t next_bucket_idx;
+	struct membership_ht_ss* ht = setsum->ss;
+	struct membership_ht_bucket *next_bkt[MEMBERSHIP_BUCKET_ENTRIES];
+	struct membership_ht_bucket *bkt = &ht->buckets[bkt_num];
+
+	/*
+	 * Push existing item (search for bucket with space in
+	 * alternative locations) to its alternative location
+	 */
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		/* Search for space in alternative locations */
+		next_bucket_idx = (bkt->sigs[i] ^ bkt_num) & ht->bucket_mask;
+		next_bkt[i] = &ht->buckets[next_bucket_idx];
+		for (j = 0; j < MEMBERSHIP_BUCKET_ENTRIES; j++) {
+			if (next_bkt[i]->targets[j] == RTE_MEMBERSHIP_NO_MATCH)
+				break;
+		}
+
+		if (j != MEMBERSHIP_BUCKET_ENTRIES)
+			break;
+	}
+
+	/* Alternative location has spare room (end of recursive function) */
+	if (i != MEMBERSHIP_BUCKET_ENTRIES) {
+		next_bkt[i]->sigs[j] = bkt->sigs[i];
+		next_bkt[i]->targets[j] = bkt->targets[i];
+		return i;
+	}
+
+	/* Pick entry that has not been pushed yet */
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++)
+		if (bkt->flags[i] == 0)
+			break;
+
+	/* All entries have been pushed, so entry cannot be added */
+	if (i == MEMBERSHIP_BUCKET_ENTRIES || nr_pushes > MEMBERSHIP_MAX_PUSHES)
+		return -ENOSPC;
+
+	/* Set flag to indicate that this entry is going to be pushed */
+	bkt->flags[i] = 1;
+
+	nr_pushes++;
+	/* Need room in alternative bucket to insert the pushed entry */
+	ret = make_space_bucket(setsum, next_bucket_idx);
+	/*
+	 * After recursive function.
+	 * Clear flags and insert the pushed entry
+	 * in its alternative location if successful,
+	 * or return error
+	 */
+	bkt->flags[i] = 0;
+	nr_pushes = 0;
+	if (ret >= 0) {
+		next_bkt[i]->sigs[ret] = bkt->sigs[i];
+		next_bkt[i]->targets[ret] = bkt->targets[i];
+		return i;
+	} else
+		return ret;
+}
+
+
+
+int
+rte_membership_add_ht(const struct rte_membership_setsum* setsum,
+							const void* key, MEMBERSHIP_TARGET_TYPE target_id)
+{
+	int i;
+	int ret;
+	struct membership_ht_ss* ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_ht_bucket* buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+	SIG_TYPE tmp_sig = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed) &
+			SIG_BITMASK;
+
+
+	uint32_t hash_val = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	uint32_t prim_bucket = hash_val & bucket_mask;
+	uint32_t sec_bucket =  (prim_bucket ^ tmp_sig) & bucket_mask;
+
+
+	/* If not full then insert into one slot*/
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if (buckets[prim_bucket].targets[i] == RTE_MEMBERSHIP_NO_MATCH) {
+			buckets[prim_bucket].sigs[i] = tmp_sig;
+			buckets[prim_bucket].targets[i] = target_id;
+			ret = i;
+			return ret;
+		}
+	}
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if(buckets[sec_bucket].targets[i] == RTE_MEMBERSHIP_NO_MATCH){
+			buckets[sec_bucket].sigs[i] = tmp_sig;
+			buckets[sec_bucket].targets[i] = target_id;
+			ret = i;
+			return ret;
+		}
+	}
+
+
+	/* random pick prim or sec for recursive displacement */
+
+	uint32_t select_bucket = (hash_val>>31) ? prim_bucket : sec_bucket;
+	ret = make_space_bucket (setsum, select_bucket);
+
+	if (ret >= 0) {
+		buckets[select_bucket].sigs[ret] = tmp_sig;
+		buckets[select_bucket].targets[ret] = target_id;
+		return ret;
+	}
+	return ret;
+}
+
+
+void
+rte_membership_free_ht(struct rte_membership_setsum *setsum)
+{
+	rte_free(setsum->ss);
+}
+
+
+int
+rte_membership_delete_ht(struct rte_membership_setsum *setsum, const void *key,
+									 MEMBERSHIP_TARGET_TYPE target_id)
+{
+	int i;
+	struct membership_ht_ss *ht = setsum->ss;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t bucket_mask = ht->bucket_mask;
+	struct membership_ht_bucket *buckets = ht->buckets;
+	uint32_t key_len = setsum->key_len;
+
+	SIG_TYPE tmp_sig = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed) &
+			SIG_BITMASK;
+
+
+	uint32_t hash_val = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	uint32_t prim_bucket = hash_val & bucket_mask;
+	uint32_t sec_bucket =  (prim_bucket ^ tmp_sig) & bucket_mask;
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++) {
+		if (tmp_sig == buckets[prim_bucket].sigs[i] &&
+					target_id == buckets[prim_bucket].targets[i]){
+			buckets[prim_bucket].targets[i] = RTE_MEMBERSHIP_NO_MATCH;
+			return 0;
+		}
+	}
+
+	for (i = 0; i < MEMBERSHIP_BUCKET_ENTRIES; i++){
+		if(tmp_sig == buckets[sec_bucket].sigs[i] &&
+						target_id == buckets[sec_bucket].targets[i]){
+			buckets[prim_bucket].targets[i] = RTE_MEMBERSHIP_NO_MATCH;
+			return 0;
+		}
+	}
+	return -ENOENT;
+}
+
+
+void
+rte_membership_reset_ht(const struct rte_membership_setsum *setsum)
+{
+	uint32_t i, j;
+	struct membership_ht_ss *ht = setsum->ss;
+	/* FIXME: inefficient*/
+	for (i = 0; i < ht->bucket_cnt; i++) {
+		for (j = 0; j < MEMBERSHIP_BUCKET_ENTRIES; j++){
+			ht->buckets[i].targets[j] = RTE_MEMBERSHIP_NO_MATCH;
+		}
+	}
+}
+
diff --git a/lib/librte_membership/rte_membership_ht.h b/lib/librte_membership/rte_membership_ht.h
new file mode 100644
index 0000000..5a69470
--- /dev/null
+++ b/lib/librte_membership/rte_membership_ht.h
@@ -0,0 +1,98 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_MEMBERSHIP_HT_H_
+#define _RTE_MEMBERSHIP_HT_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int
+rte_membership_create_ht(struct rte_membership_setsum *ss);
+
+
+int
+rte_membership_lookup_ht(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id);
+
+
+
+int
+rte_membership_lookup_bulk_ht(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, MEMBERSHIP_TARGET_TYPE *target_ids);
+
+
+
+
+int
+rte_membership_lookup_multi_ht(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id);
+
+
+
+int
+rte_membership_lookup_multi_bulk_ht(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, uint32_t match_per_key,
+		uint32_t *match_count,
+		MEMBERSHIP_TARGET_TYPE *target_ids);
+
+
+
+
+int
+rte_membership_add_ht(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE target_id);
+
+void
+rte_membership_free_ht(struct rte_membership_setsum *setsum);
+
+
+
+
+int
+rte_membership_delete_ht(struct rte_membership_setsum *ss, const void *key,
+		MEMBERSHIP_TARGET_TYPE target_id);
+
+
+void
+rte_membership_reset_ht(const struct rte_membership_setsum *setsum);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+
+#endif /* _RTE_MEMBERSHIP_HT_H_ */
diff --git a/lib/librte_membership/rte_membership_vbf.c b/lib/librte_membership/rte_membership_vbf.c
new file mode 100644
index 0000000..dd8cf6c
--- /dev/null
+++ b/lib/librte_membership/rte_membership_vbf.c
@@ -0,0 +1,391 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "rte_membership.h"
+#include "rte_membership_bf.h"
+#include "rte_membership_vbf.h"
+
+#include <rte_bitmap.h>
+#include <rte_malloc.h>
+#include <rte_memory.h>
+#include <rte_hash_crc.h>
+#include <rte_errno.h>
+
+
+/*
+ * vBF currently implemented as a linked list of BFs
+ */
+
+int
+__membership_push(const struct rte_membership_setsum *setsum,
+		struct rte_membership_bf *bf, MEMBERSHIP_TARGET_TYPE target_id);
+
+
+struct rte_membership_vbf_node
+{
+	struct rte_membership_bf *bf;
+	MEMBERSHIP_TARGET_TYPE target_id;
+	struct rte_membership_vbf_node *next;
+};
+
+struct rte_membership_vbf
+{
+	struct rte_membership_vbf_node *root;
+};
+
+
+int
+__membership_push(const struct rte_membership_setsum *setsum,
+		struct rte_membership_bf *bf, MEMBERSHIP_TARGET_TYPE target_id)
+{
+	struct rte_membership_vbf *vbf = setsum->ss;
+	struct rte_membership_vbf_node *current = vbf->root;
+
+	struct rte_membership_vbf_node *new_node;
+	new_node = rte_zmalloc_socket(NULL, sizeof(struct rte_membership_vbf_node),
+									RTE_CACHE_LINE_SIZE, setsum->socket_id);
+	if (new_node == NULL) {
+		return -ENOMEM;
+	}
+
+	new_node->bf = bf;
+	new_node->target_id = target_id;
+	new_node->next = NULL;
+
+
+	if (current != NULL) {
+		while(current->next != NULL){
+				current = current->next;
+		}
+		current->next = new_node;
+	}
+	else {
+		vbf->root = new_node;
+	}
+
+	return 0;
+}
+
+
+
+int
+rte_membership_create_vbf(struct rte_membership_setsum *setsum)
+{
+	int i;
+	int num_target = setsum->num_target;
+	struct rte_membership_vbf *vbf =
+			rte_zmalloc_socket(NULL, sizeof(struct rte_membership_vbf),
+			RTE_CACHE_LINE_SIZE, setsum->socket_id);
+	if(vbf == NULL)
+		return -ENOMEM;
+
+	vbf->root = NULL;
+	setsum->ss = vbf;
+	for (i = 1; i < num_target+1; i++) {
+		struct rte_membership_bf *bloom =
+			__membership_create_bf((const struct rte_membership_setsum *)setsum);
+
+		if (bloom == NULL) {
+		 	rte_membership_free_vbf(setsum);
+			return -ENOMEM;
+		}
+		if (__membership_push((const struct rte_membership_setsum *)setsum,
+				bloom, i) < 0) {
+			rte_membership_free_vbf(setsum);
+			return -ENOMEM;
+		}
+	}
+	return 0;
+}
+
+
+int
+rte_membership_lookup_vbf(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id)
+{
+	uint32_t key_len = setsum->key_len;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t a = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed);
+	uint32_t b = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+
+	struct rte_membership_vbf* vbf = setsum->ss;
+	struct rte_membership_vbf_node* current = vbf->root;
+
+	while (current != NULL) {
+		struct rte_membership_bf* bloom = current->bf;
+		uint32_t x;
+		uint32_t i;
+
+		struct rte_bitmap *bmp = bloom->bmp;
+
+		for (i = 0; i < bloom->num_hashes; i++) {
+			x = (a + i*b) & bloom->bucket_bitmask;
+			if (rte_bitmap_get(bmp, x) == 0) {
+				current = current->next;
+				break;
+			}
+		}
+		if(i == bloom->num_hashes){
+			*target_id = current->target_id;
+			return 1;
+		}
+	}
+	return 0;
+}
+
+
+int
+rte_membership_lookup_bulk_vbf(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, MEMBERSHIP_TARGET_TYPE *target_ids)
+{
+	uint32_t i;
+	int ret = 0;
+	uint32_t key_len = setsum->key_len;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+
+	struct rte_membership_vbf* vbf = setsum->ss;
+
+	for (i = 0; i < num_keys; i++) {
+		uint32_t a = MEMBERSHIP_PRIM_HASH(keys[i], key_len, prim_hash_seed);
+		uint32_t b = MEMBERSHIP_SEC_HASH(keys[i], key_len, sec_hash_seed);
+		struct rte_membership_vbf_node* current = vbf->root;
+		while (current != NULL) {
+			struct rte_membership_bf* bloom = current->bf;
+			uint32_t x;
+			uint32_t j;
+
+			struct rte_bitmap *bmp = bloom->bmp;
+
+			for (j = 0; j < bloom->num_hashes; j++) {
+				x = (a + j*b) & bloom->bucket_bitmask;
+				if (rte_bitmap_get(bmp, x) == 0) {
+					current = current->next;
+					break;
+				}
+			}
+			if (j == bloom->num_hashes) {
+				target_ids[i] = current->target_id;
+				ret++;
+				break;
+			}
+		}
+		if (current == NULL)
+			target_ids[i] = RTE_MEMBERSHIP_NO_MATCH;
+	}
+	return ret;
+}
+
+
+
+
+int
+rte_membership_lookup_multi_vbf(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id)
+{
+	int ret = 0;
+	uint32_t key_len = setsum->key_len;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t a = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed);
+	uint32_t b = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+
+	struct rte_membership_vbf* vbf = setsum->ss;
+	struct rte_membership_vbf_node* current = vbf->root;
+
+	while (current != NULL) {
+		struct rte_membership_bf* bloom = current->bf;
+		uint32_t x;
+		uint32_t i;
+
+		struct rte_bitmap *bmp = bloom->bmp;
+
+		for (i = 0; i < bloom->num_hashes; i++) {
+			x = (a + i*b) & bloom->bucket_bitmask;
+			if (rte_bitmap_get(bmp, x) == 0) {
+				current = current->next;
+				break;
+			}
+		}
+		if(i == bloom->num_hashes){
+			target_id[ret] = current->target_id;
+			ret++;
+			current = current->next;
+		}
+	}
+	return ret;
+}
+
+
+
+int
+rte_membership_lookup_multi_bulk_vbf(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, uint32_t match_per_key,
+		uint32_t *match_count,
+		MEMBERSHIP_TARGET_TYPE *target_ids)
+{
+	uint32_t j;
+	int ret = 0;
+	uint32_t key_len = setsum->key_len;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	struct rte_membership_vbf* vbf = setsum->ss;
+
+	for (j = 0; j < num_keys; j++) {
+		uint32_t match_cnt=0;
+		uint32_t a = MEMBERSHIP_PRIM_HASH(keys[j], key_len, prim_hash_seed);
+		uint32_t b = MEMBERSHIP_SEC_HASH(keys[j], key_len, sec_hash_seed);
+		struct rte_membership_vbf_node* current = vbf->root;
+		while (current != NULL) {
+			struct rte_membership_bf* bloom = current->bf;
+			uint32_t x;
+			uint32_t i;
+
+			struct rte_bitmap *bmp = bloom->bmp;
+
+			for (i = 0; i < bloom->num_hashes; i++) {
+				x = (a + i * b) & bloom->bucket_bitmask;
+				if (rte_bitmap_get(bmp, x) == 0) {
+					current = current->next;
+					break;
+				}
+			}
+			if (i == bloom->num_hashes) {
+				if (match_cnt >= match_per_key)
+					break;
+				target_ids[j*match_per_key+match_cnt] = current->target_id;
+				match_cnt++;
+				current = current->next;
+			}
+		}
+		match_count[j] = match_cnt;
+		if (match_cnt != 0)
+			ret++;
+	}
+	return ret;
+}
+
+
+
+int
+rte_membership_add_vbf(const struct rte_membership_setsum *setsum,
+							const void *key, MEMBERSHIP_TARGET_TYPE target_id)
+{
+
+	uint32_t key_len = setsum->key_len;
+	uint32_t prim_hash_seed = setsum->prim_hash_seed;
+	uint32_t sec_hash_seed = setsum->sec_hash_seed;
+	uint32_t a = MEMBERSHIP_PRIM_HASH(key, key_len, prim_hash_seed);
+	uint32_t b = MEMBERSHIP_SEC_HASH(key, key_len, sec_hash_seed);
+	struct rte_membership_vbf* vbf = setsum->ss;
+	struct rte_membership_vbf_node* current = vbf->root;
+	uint32_t x;
+	uint32_t i;
+
+	while (current != NULL) {
+		if (current->target_id != target_id) {
+			current = current->next;
+			continue;
+		}
+
+		struct rte_membership_bf *bloom = current->bf;
+
+		struct rte_bitmap *bmp = bloom->bmp;
+
+		for (i = 0; i < bloom->num_hashes; i++) {
+			x = (a + i * b) & bloom->bucket_bitmask;
+			rte_bitmap_set(bmp, x);
+		}
+		return 0;
+	}
+
+	/* Here means there is no BF matches the target. So we add a new BF */
+
+	struct rte_membership_bf *bloom = __membership_create_bf(setsum);
+
+	if(bloom == NULL) {
+		return -ENOMEM;
+	}
+
+	struct rte_bitmap *bmp = bloom->bmp;
+
+	for (i = 0; i < bloom->num_hashes; i++) {
+		x = (a + i * b) & bloom->bucket_bitmask;
+		rte_bitmap_set(bmp, x);
+	}
+
+	if (__membership_push(setsum, bloom, i) < 0) {
+		rte_free(bloom->bmp_array);
+		rte_free(bloom);
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+
+void
+rte_membership_free_vbf(struct rte_membership_setsum *setsum)
+{
+	struct rte_membership_vbf* vbf = setsum->ss;
+	if (vbf != NULL) {
+		struct rte_membership_vbf_node* current = vbf->root;
+		struct rte_membership_vbf_node* next;
+		while (current != NULL) {
+			next = current->next;
+			if(current->bf != NULL){
+				rte_free(current->bf->bmp_array);
+				rte_free(current->bf);
+			}
+			rte_free(current);
+			current = next;
+		}
+	}
+}
+
+
+
+
+void
+rte_membership_reset_vbf(const struct rte_membership_setsum *setsum)
+{
+
+	struct rte_membership_vbf *vbf = setsum->ss;
+	struct rte_membership_vbf_node *current = vbf->root;
+
+	while (current != NULL) {
+		if (current->bf != NULL)
+			rte_bitmap_reset(current->bf->bmp_array);
+		current = current->next;
+	}
+}
\ No newline at end of file
diff --git a/lib/librte_membership/rte_membership_vbf.h b/lib/librte_membership/rte_membership_vbf.h
new file mode 100644
index 0000000..4cc06ac
--- /dev/null
+++ b/lib/librte_membership/rte_membership_vbf.h
@@ -0,0 +1,85 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_MEMBERSHIP_VBF_H_
+#define _RTE_MEMBERSHIP_VBF_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int
+rte_membership_create_vbf(struct rte_membership_setsum *ss);
+
+
+int
+rte_membership_lookup_vbf(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id);
+
+
+int
+rte_membership_lookup_bulk_vbf(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, MEMBERSHIP_TARGET_TYPE *target_ids);
+
+
+int
+rte_membership_lookup_multi_vbf(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE *target_id);
+
+
+int
+rte_membership_lookup_multi_bulk_vbf(const struct rte_membership_setsum *setsum,
+		const void **keys, uint32_t num_keys, uint32_t match_per_key,
+		uint32_t *match_count,
+		MEMBERSHIP_TARGET_TYPE *target_ids);
+
+
+
+int
+rte_membership_add_vbf(const struct rte_membership_setsum *setsum,
+		const void *key, MEMBERSHIP_TARGET_TYPE target_id);
+
+
+void
+rte_membership_free_vbf(struct rte_membership_setsum *ss);
+
+
+void
+rte_membership_reset_vbf(const struct rte_membership_setsum *setsum);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_MEMBERSHIP_VBF_H_ */
diff --git a/lib/librte_membership/rte_membership_version.map b/lib/librte_membership/rte_membership_version.map
new file mode 100644
index 0000000..d10f8a2
--- /dev/null
+++ b/lib/librte_membership/rte_membership_version.map
@@ -0,0 +1,15 @@
+DPDK_17.08 {
+	global:
+
+	rte_membership_create;
+	rte_membership_lookup;
+	rte_membership_lookup_bulk;
+	rte_membership_lookup_multi;
+	rte_membership_lookup_multi_bulk;
+	rte_membership_add;
+	rte_membership_free;
+	rte_membership_reset;
+	rte_membership_delete;
+
+	local: *;
+};
diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index bcaf1b3..58218fe 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -85,6 +85,7 @@ _LDLIBS-$(CONFIG_RTE_LIBRTE_CFGFILE)        += -lrte_cfgfile
 _LDLIBS-y += --whole-archive
 
 _LDLIBS-$(CONFIG_RTE_LIBRTE_HASH)           += -lrte_hash
+_LDLIBS-$(CONFIG_RTE_LIBRTE_MEMBERSHIP)     += -lrte_membership
 _LDLIBS-$(CONFIG_RTE_LIBRTE_VHOST)          += -lrte_vhost
 _LDLIBS-$(CONFIG_RTE_LIBRTE_KVARGS)         += -lrte_kvargs
 _LDLIBS-$(CONFIG_RTE_LIBRTE_MBUF)           += -lrte_mbuf
diff --git a/test/test/Makefile b/test/test/Makefile
index ee240be..2dd0a90 100644
--- a/test/test/Makefile
+++ b/test/test/Makefile
@@ -123,6 +123,8 @@ SRCS-y += test_logs.c
 SRCS-y += test_memcpy.c
 SRCS-y += test_memcpy_perf.c
 
+
+SRCS-$(CONFIG_RTE_LIBRTE_MEMBERSHIP) += test_membership.c
 SRCS-$(CONFIG_RTE_LIBRTE_EFD) += test_efd.c
 SRCS-$(CONFIG_RTE_LIBRTE_EFD) += test_efd_perf.c
 
diff --git a/test/test/test_membership.c b/test/test/test_membership.c
new file mode 100644
index 0000000..f2ccd15
--- /dev/null
+++ b/test/test/test_membership.c
@@ -0,0 +1,459 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include <rte_memcpy.h>
+#include <rte_malloc.h>
+#include <rte_membership.h>
+#include <rte_byteorder.h>
+#include <rte_random.h>
+#include <rte_debug.h>
+#include <rte_ip.h>
+
+
+#include "test.h"
+
+void *setsum_ht;
+void *setsum_cache;
+void *setsum_bf;
+void *setsum_vbf;
+
+#define KEY 0xffff
+#define KEY1 0xfffe
+#define TARGET 31
+
+#define ITERATIONS  3
+#define MAX_KEYSIZE  4
+
+static 	struct rte_membership_parameters params = {
+		.name = "test_membership_ht",
+		.type = SETSUM_TYPE_HT,
+		.num_keys = 1 << 16,       /* Total hash table entries. */
+		.key_len = 4,       /* Length of hash key. */
+
+	    /*num_target and false_postive_rate only relevent with BF based set summary*/
+		.num_target = 32,
+		.false_postive_rate = 0.03,
+		.prim_hash_seed = 1,
+		.sec_hash_seed = 11,
+		.socket_id = 0          /* NUMA Socket ID for memory. */
+	};
+
+
+#define RETURN_IF_ERROR(cond, str, ...) do {				\
+	if (cond) {							\
+		printf("ERROR line %d: " str "\n", __LINE__, ##__VA_ARGS__); \
+		return -1;						\
+	}								\
+} while(0)
+
+static int test_membership_create(void)
+{
+
+
+	setsum_ht = rte_membership_create(&params);
+
+	params.name = "test_membership_cache";
+	params.type = SETSUM_TYPE_CACHE;
+
+	setsum_cache = rte_membership_create(&params);
+
+	params.name = "test_membership_bf";
+	params.type = SETSUM_TYPE_BF;
+
+	setsum_bf = rte_membership_create(&params);
+
+	params.name = "test_membership_vbf";
+	params.type = SETSUM_TYPE_VBF;
+
+	setsum_vbf = rte_membership_create(&params);
+
+	if(setsum_ht==NULL || setsum_cache == NULL || setsum_bf == NULL ||
+			setsum_vbf == NULL) {
+		printf("Creation of setsums fail\n");
+		return -1;
+	}
+	printf("Creation of setsums success\n");
+	return 0;
+}
+
+static int test_membership_insert(void)
+{
+	int ret_ht, ret_cache, ret_bf, ret_vbf;
+	uint32_t key=KEY;
+	uint32_t target_bf = 1;
+	ret_ht = rte_membership_add(setsum_ht, &key, TARGET);
+	ret_cache = rte_membership_add(setsum_cache, &key, TARGET);
+	ret_bf = rte_membership_add(setsum_bf, &key, target_bf);
+	ret_vbf = rte_membership_add(setsum_vbf, &key, TARGET);
+	printf("%d, %d, %d, %d\n", ret_ht, ret_cache, ret_bf, ret_vbf);
+	RETURN_IF_ERROR(ret_ht < 0 || ret_cache < 0 || ret_bf < 0 || ret_vbf < 0,
+			"insert error");
+
+	printf("insert key %d with target %d success\n", key, TARGET);
+	return 0;
+}
+
+static int test_membership_lookup(void)
+{
+	int ret_ht, ret_cache, ret_bf, ret_vbf;
+	uint16_t target_ht, target_cache, target_bf, target_vbf;
+	MEMBERSHIP_TARGET_TYPE target_ids_ht[8] = {0};
+	MEMBERSHIP_TARGET_TYPE target_ids_cache[8] = {0};
+	MEMBERSHIP_TARGET_TYPE target_ids_bf[8] = {0};
+	MEMBERSHIP_TARGET_TYPE target_ids_vbf[8] = {0};
+	uint32_t key = KEY;
+	uint32_t key1 = KEY1;
+	uint32_t *key_array[8];
+	uint32_t num_key_ht = 2;
+	uint32_t num_key_cache = 2;
+	uint32_t num_key_bf = 2;
+
+	/* single lookup test */
+	ret_ht = rte_membership_lookup(setsum_ht, &key, &target_ht);
+	ret_cache = rte_membership_lookup(setsum_cache, &key, &target_cache);
+	ret_bf = rte_membership_lookup(setsum_bf, &key, &target_bf);
+	ret_vbf = rte_membership_lookup(setsum_vbf, &key, &target_vbf);
+	if(ret_ht < 0 || ret_cache < 0 || ret_bf < 0 || ret_vbf < 0){
+		printf("lookup ret:%d, %d, %d, %d\n", ret_ht, ret_cache, ret_bf, ret_vbf);
+		return -1;
+	}
+	printf("lookup get target:%d, %d, %d, %d\n", target_ht, target_cache,
+			target_bf, target_vbf);
+	printf("lookup single key success\n");
+
+	/* bulk lookup test */
+	key_array[0] = &key1;
+	key_array[1] = &key;
+
+	ret_ht = rte_membership_lookup_bulk(setsum_ht, (const void**)(key_array),
+			num_key_ht, target_ids_ht);
+
+	ret_cache = rte_membership_lookup_bulk(setsum_cache, (const void**)(key_array),
+			num_key_cache,target_ids_cache);
+
+	ret_bf = rte_membership_lookup_bulk(setsum_bf, (const void**)(key_array),
+			num_key_bf, target_ids_bf);
+
+	ret_vbf = rte_membership_lookup_bulk(setsum_vbf, (const void**)(key_array),
+			num_key_bf, target_ids_vbf);
+
+	RETURN_IF_ERROR((target_ids_ht[0] != target_ids_cache[0]) ||
+			(target_ids_ht[1] != target_ids_cache[1]), "bulk lookup error");
+	printf("bulk lookup target 0:%d, %d， %d， %d\n", target_ids_ht[0],
+			target_ids_cache[0], target_ids_bf[0], target_ids_vbf[0]);
+
+	printf("bulk lookup target 1:%d, %d， %d， %d\n", target_ids_ht[1],
+			target_ids_cache[1], target_ids_bf[1], target_ids_vbf[1]);
+
+	RETURN_IF_ERROR((ret_ht != ret_cache || ret_ht != ret_bf || ret_ht != ret_vbf),
+			"bulk lookup error");
+
+	return 0;
+}
+
+
+static int test_membership_delete(void)
+{
+	int ret_ht, ret_cache, ret_bf, ret_vbf;
+	uint32_t key = KEY;
+	uint16_t target_ht, target_cache, target_bf, target_vbf;
+	ret_ht = rte_membership_delete(setsum_ht, &key, TARGET);
+	ret_cache = rte_membership_delete(setsum_cache, &key, TARGET);
+	ret_bf = rte_membership_delete(setsum_bf, &key, TARGET);
+	ret_vbf = rte_membership_delete(setsum_vbf, &key, TARGET);
+	RETURN_IF_ERROR(ret_ht < 0 || ret_cache < 0 || ret_bf > 0 || ret_vbf > 0,
+			"bulk lookup error");
+
+	ret_ht = rte_membership_lookup(setsum_ht, &key, &target_ht);
+	ret_cache = rte_membership_lookup(setsum_cache, &key, &target_cache);
+	ret_bf = rte_membership_lookup(setsum_bf, &key, &target_bf);
+	ret_vbf = rte_membership_lookup(setsum_vbf, &key, &target_vbf);
+	printf("lookup delete target:%d, %d, %d, %d\n", target_ht, target_cache,
+			target_bf, target_vbf);
+	printf("lookup delete ret:%d, %d, %d, %d\n", ret_ht, ret_cache,
+			ret_bf, ret_vbf);
+	return 0;
+}
+
+
+static int test_membership_multimatch(void)
+{
+	int ret_ht, ret_vbf, ret_cache, ret_bf;
+	MEMBERSHIP_TARGET_TYPE target_ids_ht[32] = {0};
+	MEMBERSHIP_TARGET_TYPE target_ids_vbf[32] = {0};
+	MEMBERSHIP_TARGET_TYPE target_ids_bf[32] = {0};
+	MEMBERSHIP_TARGET_TYPE target_ids_cache[32] = {0};
+
+	MEMBERSHIP_TARGET_TYPE target_ids_ht_m[2][32] = {{0}};
+	MEMBERSHIP_TARGET_TYPE target_ids_vbf_m[2][32] = {{0}};
+	MEMBERSHIP_TARGET_TYPE target_ids_bf_m[2][32] = {{0}};
+	MEMBERSHIP_TARGET_TYPE target_ids_cache_m[2][32] = {{0}};
+	uint32_t key = KEY;
+	uint32_t key1 = KEY1;
+	uint32_t* key_array[8];
+	uint32_t match_count_ht[8];
+	uint32_t match_count_vbf[8];
+	uint32_t match_count_cache[8];
+	uint32_t match_count_bf[8];
+
+	uint32_t num_key_ht = 2;
+	uint32_t num_key_vbf = 2;
+	uint32_t num_key_cache = 2;
+	uint32_t num_key_bf = 2;
+
+	uint32_t i, j;
+	/* same key at most inserted 2*entry_per_bucket times for HT mode */
+	for (i = 1; i < 33; i++) {
+		ret_ht = rte_membership_add(setsum_ht, &key, i);
+		ret_ht = rte_membership_add(setsum_ht, &key1, i);
+		ret_vbf = rte_membership_add(setsum_vbf, &key, i);
+		ret_vbf = rte_membership_add(setsum_vbf, &key1, i);
+
+		/* for cache and bf mode, they do not support multimatch
+		 *  the mutimatch should works like single match
+		 */
+		ret_cache = rte_membership_add(setsum_cache, &key, i);
+		ret_cache = rte_membership_add(setsum_cache, &key1, i);
+		ret_bf = rte_membership_add(setsum_bf, &key, 1);
+		ret_bf = rte_membership_add(setsum_bf, &key1, 1);
+
+		RETURN_IF_ERROR(ret_ht < 0 || ret_vbf < 0 || ret_cache < 0 ||
+				ret_bf < 0, "insert error");
+	}
+
+	/* single multimatch test */
+	ret_vbf = rte_membership_lookup_multi(setsum_vbf, &key, target_ids_vbf);
+	ret_ht = rte_membership_lookup_multi(setsum_ht, &key, target_ids_ht);
+	ret_bf = rte_membership_lookup_multi(setsum_bf, &key, target_ids_bf);
+	ret_cache = rte_membership_lookup_multi(setsum_cache, &key, target_ids_cache);
+	RETURN_IF_ERROR(ret_ht < 0 || ret_vbf < 0 || ret_cache < 0 ||
+				ret_bf < 0, "lookup_multi error");
+
+	for (i=0; i < (uint32_t)ret_ht; i++) {
+		printf("%d,", target_ids_ht[i]);
+		RETURN_IF_ERROR(target_ids_ht[i] != target_ids_vbf[i],
+				"singl multimatch lookup error");
+	}
+	printf("\n");
+
+	/* bulk multimatch test */
+	key_array[0] = &key;
+	key_array[1] = &key1;
+	ret_vbf = rte_membership_lookup_multi_bulk(setsum_vbf,
+			(const void **)key_array, num_key_ht, 32, match_count_vbf,
+			(MEMBERSHIP_TARGET_TYPE *)target_ids_vbf_m);
+
+	ret_ht = rte_membership_lookup_multi_bulk(setsum_ht,
+			(const void **)key_array, num_key_vbf, 32, match_count_ht,
+			(MEMBERSHIP_TARGET_TYPE *)target_ids_ht_m);
+
+	ret_cache = rte_membership_lookup_multi_bulk(setsum_cache,
+			(const void **)key_array, num_key_cache, 32, match_count_cache,
+			(MEMBERSHIP_TARGET_TYPE *)target_ids_cache_m);
+
+	ret_bf = rte_membership_lookup_multi_bulk(setsum_bf,
+			(const void **)key_array, num_key_bf, 32, match_count_bf,
+			(MEMBERSHIP_TARGET_TYPE *)target_ids_bf_m);
+
+
+	for (i = 0; i < num_key_ht; i++) {
+		printf("ht match count %d %d\n", match_count_ht[0], match_count_ht[1]);
+		printf("vbf match count %d %d\n", match_count_vbf[0], match_count_vbf[1]);
+		printf("cache match count %d %d\n", match_count_cache[0], match_count_cache[1]);
+		printf("bf match count %d %d\n", match_count_bf[0], match_count_bf[1]);
+	}
+
+
+	for (i = 0; i < num_key_ht; i++) {
+		printf("target for key %d: ", i);
+		printf("ht:");
+		for (j = 0; j < match_count_ht[i]; j++) {
+			printf("%d,", target_ids_ht_m[i][j]);
+		}
+		printf("vbf:");
+		for (j = 0; j < match_count_vbf[i]; j++) {
+			printf("%d,", target_ids_vbf_m[i][j]);
+		}
+		printf("cache:");
+		for (j = 0; j < match_count_cache[i]; j++) {
+			printf("%d,", target_ids_cache_m[i][j]);
+		}
+		printf("bf:");
+		for (j = 0; j < match_count_bf[i]; j++) {
+			printf("%d,", target_ids_bf_m[i][j]);
+		}
+		printf("\n");
+	}
+	return 0;
+}
+
+
+
+
+static int test_membership_loadfactor(void)
+{
+	uint8_t simple_key[MAX_KEYSIZE];
+	unsigned i, j;
+	unsigned added_keys, average_keys_added = 0;
+	int ret;
+
+	rte_membership_reset(setsum_ht);
+	rte_membership_reset(setsum_cache);
+
+
+	/* test HT mode */
+	for (j = 0; j < ITERATIONS; j++) {
+		ret = 0;
+		/* Add random entries until key cannot be added */
+		for (added_keys = 0; ret >= 0; added_keys++) {
+			for (i = 0; i < params.key_len; i++)
+				simple_key[i] = rte_rand() % 255;
+			uint16_t target = rte_rand() % ((1 << 16) - 1);
+			ret = rte_membership_add(setsum_ht, simple_key, target);
+		}
+		if (ret != -ENOSPC) {
+			printf("Unexpected error when adding keys\n");
+			return -1;
+		}
+
+		average_keys_added += added_keys;
+
+		/* Reset the table */
+		rte_membership_reset(setsum_ht);
+
+		/* Print a dot to show progress on operations */
+		printf(".");
+		fflush(stdout);
+	}
+
+	average_keys_added /= ITERATIONS;
+
+	printf("\nAverage table utilization for HT mode = %.2f%% (%u/%u)\n",
+		((double) average_keys_added / params.num_keys * 100),
+		average_keys_added, params.num_keys);
+
+
+
+	/* test cache mode */
+	added_keys = average_keys_added = 0;
+	for (j = 0; j < ITERATIONS; j++) {
+		ret = 0;
+		/* Add random entries until key cannot be added */
+		for (added_keys = 0; ret == 0; added_keys++) {
+			for (i = 0; i < params.key_len; i++)
+				simple_key[i] = rte_rand() % 255;
+			uint16_t target = rte_rand() % ((1 << 16) - 1);
+			ret = rte_membership_add(setsum_cache, simple_key, target);
+		}
+		if (ret != 1) {
+			printf("Unexpected error when adding keys\n");
+			return -1;
+		}
+
+		average_keys_added += added_keys;
+
+		/* Reset the table */
+		rte_membership_reset(setsum_cache);
+
+		/* Print a dot to show progress on operations */
+		printf(".");
+		fflush(stdout);
+	}
+
+	average_keys_added /= ITERATIONS;
+
+	printf("\nAverage table utilization for cache mode = %.2f%% (%u/%u)\n",
+		((double) average_keys_added / params.num_keys * 100),
+		average_keys_added, params.num_keys);
+	return 0;
+}
+
+
+
+
+
+
+static int
+test_membership(void)
+{
+
+	/* Simple tests for initial debug usage */
+	if (test_membership_create() < 0) {
+		rte_membership_free(setsum_ht);
+		rte_membership_free(setsum_cache);
+		rte_membership_free(setsum_bf);
+		rte_membership_free(setsum_vbf);
+		return -1;
+	}
+	if (test_membership_insert() < 0) {
+		rte_membership_free(setsum_ht);
+		rte_membership_free(setsum_cache);
+		rte_membership_free(setsum_bf);
+		rte_membership_free(setsum_vbf);
+		return -1;
+	}
+	if (test_membership_lookup() < 0) {
+		rte_membership_free(setsum_ht);
+		rte_membership_free(setsum_cache);
+		rte_membership_free(setsum_bf);
+		rte_membership_free(setsum_vbf);
+		return -1;
+	}
+	if (test_membership_delete() < 0) {
+		rte_membership_free(setsum_ht);
+		rte_membership_free(setsum_cache);
+		rte_membership_free(setsum_bf);
+		rte_membership_free(setsum_vbf);
+		return -1;
+	}
+	if (test_membership_multimatch() < 0) {
+		rte_membership_free(setsum_ht);
+		rte_membership_free(setsum_cache);
+		rte_membership_free(setsum_bf);
+		rte_membership_free(setsum_vbf);
+		return -1;
+	}
+
+
+	if (test_membership_loadfactor() < 0) {
+		rte_membership_free(setsum_ht);
+		rte_membership_free(setsum_cache);
+	}
+	/* more complex test */
+	/* FIXME: to be implemented */
+
+	return 0;
+}
+
+REGISTER_TEST_COMMAND(membership_autotest, test_membership);
