diff --git a/test_plans/vm2vm_virtio_net_perf_test_plan.rst b/test_plans/vm2vm_virtio_net_perf_test_plan.rst
index 2988e174..a5692d4b 100644
--- a/test_plans/vm2vm_virtio_net_perf_test_plan.rst
+++ b/test_plans/vm2vm_virtio_net_perf_test_plan.rst
@@ -40,8 +40,9 @@ Description
 This test plan test vhost tx offload (TSO and UFO) function by verifing the TSO/cksum in the TCP/IP
 stack enabled environment and UFO/cksum in the UDP/IP stack enabled environment with vm2vm split ring
 and packed ring vhost-user/virtio-net mergeable path. Also add case to check the payload of large packet
-is valid with vm2vm split ring and packed ring vhost-user/virtio-net mergeable and non-mergeable dequeue
-zero copy test. For packed virtqueue virtio-net test, need qemu version > 4.2.0 and VM kernel version > v5.1.
+is valid with vm2vm split ring and packed ring vhost-user/virtio-net mergeable and non-mergeable.
+Meanwhile, this plan also check function and performance of split ring enqueue operation with CBDMA channels.
+For packed virtqueue virtio-net test, need qemu version > 4.2.0 and VM kernel version > v5.1.
 
 Test flow
 =========
@@ -51,16 +52,16 @@ Virtio-net <-> Vhost <-> Testpmd <-> Vhost <-> Virtio-net
 Test Case 1: VM2VM split ring vhost-user/virtio-net test with tcp traffic
 =========================================================================
 
-1. Launch the Vhost sample by below commands::
+1. Launch the Vhost sample on socket 0 by below commands::
 
     rm -rf vhost-net*
     ./testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1' \
     --vdev 'net_vhost1,iface=vhost-net1,queues=1'  -- -i --nb-cores=2 --txd=1024 --rxd=1024
     testpmd>start
 
-2. Launch VM1 and VM2::
+2. Launch VM1 and VM2 on socket 1::
 
-    qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
+    taskset -c 32 qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
     -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16.img  \
     -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
@@ -71,7 +72,7 @@ Test Case 1: VM2VM split ring vhost-user/virtio-net test with tcp traffic
     -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
     -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :10
 
-   qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
+   taskset -c 33 qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
     -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16-2.img  \
     -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
@@ -104,19 +105,19 @@ Test Case 1: VM2VM split ring vhost-user/virtio-net test with tcp traffic
     Port 1 should have rx packets above 1522
 
 
-Test Case 2: VM2VM split ring vhost-user/virtio-net dequeue zero-copy test with tcp traffic
-===========================================================================================
+Test Case 2: VM2VM split ring vhost-user/virtio-net CBDMA enable test with tcp traffic
+======================================================================================
 
 1. Launch the Vhost sample by below commands::
 
     rm -rf vhost-net*
-    ./testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dequeue-zero-copy=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dequeue-zero-copy=1'  -- -i --nb-cores=2 --txd=1024 --rxd=1024
+    ./testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dmas=[txq0@00:04.0],dmathr=512' \
+    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dmas=[txq0@00:04.1],dmathr=512'  -- -i --nb-cores=2 --txd=1024 --rxd=1024
     testpmd>start
 
-2. Launch VM1 and VM2::
+2. Launch VM1 and VM2 on socket 1::
 
-    qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
+    taskset -c 32 qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
     -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16.img  \
     -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
@@ -127,7 +128,7 @@ Test Case 2: VM2VM split ring vhost-user/virtio-net dequeue zero-copy test with
     -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
     -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :10
 
-   qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
+   taskset -c 33 qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
     -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16-2.img  \
     -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
@@ -159,6 +160,8 @@ Test Case 2: VM2VM split ring vhost-user/virtio-net dequeue zero-copy test with
     Port 0 should have tx packets above 1522
     Port 1 should have rx packets above 1522
 
+7. Check throughput and compare with case1, case2 performance should larger than case1.
+
 Test Case 3: VM2VM split ring vhost-user/virtio-net test with udp traffic
 =========================================================================
 
@@ -262,14 +265,14 @@ Test Case 4: Check split ring virtio-net device capability
     tx-tcp-ecn-segmentation: on
     tx-tcp6-segmentation: on
 
-Test Case 5: VM2VM virtio-net split ring mergeable zero copy test with large packet payload valid check
-=======================================================================================================
+Test Case 5: VM2VM virtio-net split ring mergeable CBDMA enable test with large packet payload valid check
+==========================================================================================================
 
 1. Launch the Vhost sample by below commands::
 
     rm -rf vhost-net*
-    ./testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dequeue-zero-copy=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dequeue-zero-copy=1'  -- -i --nb-cores=1 --txd=1024 --rxd=1024
+    ./testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dmas=[txq0@80:04.0],dmathr=0' \
+    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dmas=[txq0@80:04.1],dmathr=0'  -- -i --nb-cores=2 --txd=1024 --rxd=1024
     testpmd>start
 
 2. Launch VM1 and VM2::
@@ -310,14 +313,14 @@ Test Case 5: VM2VM virtio-net split ring mergeable zero copy test with large pac
 
     Under VM1, run: `scp [xxx] root@1.1.1.8:/`   [xxx] is the file name
 
-Test Case 6: VM2VM virtio-net split ring non-mergeable zero copy test with large packet payload valid check
-===========================================================================================================
+Test Case 6: VM2VM virtio-net split ring non-mergeable CBDMA enable test with large packet payload valid check
+==============================================================================================================
 
 1. Launch the Vhost sample by below commands::
 
     rm -rf vhost-net*
-    ./testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dequeue-zero-copy=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dequeue-zero-copy=1'  -- -i --nb-cores=1 --txd=1024 --rxd=1024
+    ./testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1' \
+    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dmas=[txq0@80:04.1],dmathr=0'  -- -i --nb-cores=2 --txd=1024 --rxd=1024
     testpmd>start
 
 2. Launch VM1 and VM2::
@@ -413,62 +416,7 @@ Test Case 7: VM2VM packed ring vhost-user/virtio-net test with tcp traffic
     Port 0 should have tx packets above 1522
     Port 1 should have rx packets above 1522
 
-Test Case 8: VM2VM packed ring vhost-user/virtio-net dequeue zero-copy test with tcp traffic
-============================================================================================
-
-1. Launch the Vhost sample by below commands::
-
-    rm -rf vhost-net*
-    ./testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dequeue-zero-copy=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dequeue-zero-copy=1'  -- -i --nb-cores=2 --txd=1024 --rxd=1024
-    testpmd>start
-
-2. Launch VM1 and VM2::
-
-    qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6002-:22 \
-    -chardev socket,id=char0,path=./vhost-net0 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :10
-
-   qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu16-2.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6003-:22 \
-    -chardev socket,id=char0,path=./vhost-net1 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :12
-
-3. On VM1, set virtio device IP and run arp protocal::
-
-    ifconfig ens3 1.1.1.2
-    arp -s 1.1.1.8 52:54:00:00:00:02
-
-4. On VM2, set virtio device IP and run arp protocal::
-
-    ifconfig ens3 1.1.1.8
-    arp -s 1.1.1.2 52:54:00:00:00:01
-
-5. Check the iperf performance between two VMs by below commands::
-
-    Under VM1, run: `iperf -s -i 1`
-    Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
-
-6. Check both 2VMs can receive and send big packets to each other::
-
-    testpmd>show port xstats all
-    Port 0 should have tx packets above 1522
-    Port 1 should have rx packets above 1522
-
-Test Case 9: VM2VM packed ring vhost-user/virtio-net test with udp traffic
+Test Case 8: VM2VM packed ring vhost-user/virtio-net test with udp traffic
 ==========================================================================
 
 1. Launch the Vhost sample by below commands::
@@ -523,7 +471,7 @@ Test Case 9: VM2VM packed ring vhost-user/virtio-net test with udp traffic
     Port 0 should have tx packets above 1522
     Port 1 should have rx packets above 1522
 
-Test Case 10: Check packed ring virtio-net device capability
+Test Case 9: Check packed ring virtio-net device capability
 ============================================================
 
 1. Launch the Vhost sample by below commands::
@@ -571,14 +519,14 @@ Test Case 10: Check packed ring virtio-net device capability
     tx-tcp-ecn-segmentation: on
     tx-tcp6-segmentation: on
 
-Test Case 11: VM2VM packed ring virtio-net mergeable dequeue zero copy test with large packet payload valid check
-=================================================================================================================
+Test Case 10: VM2VM packed ring virtio-net mergeable with large packet payload valid check
+==========================================================================================
 
 1. Launch the Vhost sample by below commands::
 
     rm -rf vhost-net*
-    ./testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dequeue-zero-copy=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dequeue-zero-copy=1'  -- -i --nb-cores=1 --txd=1024 --rxd=1024
+    ./testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1' \
+    --vdev 'net_vhost1,iface=vhost-net1,queues=1'  -- -i --nb-cores=1 --txd=1024 --rxd=1024
     testpmd>start
 
 2. Launch VM1 and VM2::
@@ -619,14 +567,14 @@ Test Case 11: VM2VM packed ring virtio-net mergeable dequeue zero copy test with
 
     Under VM1, run: `scp [xxx] root@1.1.1.8:/`   [xxx] is the file name
 
-Test Case 12: VM2VM packed ring virtio-net non-mergeable dequeue zero copy test with large packet payload valid check
-=====================================================================================================================
+Test Case 11: VM2VM packed ring virtio-net non-mergeable with large packet payload valid check
+==============================================================================================
 
 1. Launch the Vhost sample by below commands::
 
     rm -rf vhost-net*
-    ./testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1,dequeue-zero-copy=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,dequeue-zero-copy=1'  -- -i --nb-cores=1 --txd=1024 --rxd=1024
+    ./testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=1' \
+    --vdev 'net_vhost1,iface=vhost-net1,queues=1'  -- -i --nb-cores=1 --txd=1024 --rxd=1024
     testpmd>start
 
 2. Launch VM1 and VM2::
