diff --git a/test_plans/vhost_cbdma_test_plan.rst b/test_plans/vhost_cbdma_test_plan.rst
index 0b7af0ea..cbeb7248 100644
--- a/test_plans/vhost_cbdma_test_plan.rst
+++ b/test_plans/vhost_cbdma_test_plan.rst
@@ -13,25 +13,28 @@ data path with CBDMA driver in the PVP topology environment with testpmd.
 
 CBDMA is a kind of DMA engine, Vhost asynchronous data path leverages DMA devices
 to offload memory copies from the CPU and it is implemented in an asynchronous way.
-It enables applications, like OVS, to save CPU cycles and hide memory copy overhead, thus achieving higher throughput.
-Vhost doesn't manage DMA devices and applications, like OVS, need to manage and configure CBDMA devices.
-Applications need to tell vhost what CBDMA devices to use in every data path function call.
-This design enables the flexibility for applications to dynamically use DMA channels in different
-function modules, not limited in vhost. In addition, vhost supports M:N mapping between vrings
-and DMA virtual channels. Specifically, one vring can use multiple different DMA channels
-and one DMA channel can be shared by multiple vrings at the same time.
+As a result, large packet copy can be accelerated by the DMA engine, and vhost can
+free CPU cycles for higher level functions.
 
-From DPDK22.07, this feature is implemented on both split and packed ring enqueue and dequeue data path.
+Asynchronous data path is enabled per tx/rx queue, and users need
+to specify the DMA device used by the tx/rx queue. Each tx/rx queue
+only supports to use one DMA device, but one DMA device can be shared
+among multiple tx/rx queues of different vhostpmd ports.
+
+Two PMD parameters are added:
+- dmas:	specify the used DMA device for a tx/rx queue
+(Default: no queues enable asynchronous data path)
+- dma-ring-size: DMA ring size.
+(Default: 4096).
+
+Here is an example:
+--vdev 'eth_vhost0,iface=./s0,dmas=[txq0@0000:00.01.0;rxq0@0000:00.01.1],dma-ring-size=4096'
 
 Note:
-1. When CBDMA devices are bound to vfio driver, VA mode is the default and recommended.
+1.When CBDMA device are bound to vfio driver, VA mode is the default and recommended.
 For PA mode, page by page mapping may exceed IOMMU's max capability, better to use 1G guest hugepage.
-2. DPDK local patch that about vhost pmd is needed when testing Vhost asynchronous data path with testpmd.
-This patch supports to bind dma to each lcore in testpmd. To enable this feature, need to add
-"--lcore-dma=[fwd-lcore-id@dma-bdf,...]" in testpmd. After set this parameter for all forwarding cores,
-vhost will use dma belonging to lcore to offload copies.
-
-3. by default, the xl710 Intel NIC does not activate the ETH RSS IPv4/TCP data stream. So we need to execute  `port config all rss ipv4-tcp` in testpmd.
+2.by default, the xl710 Intel NIC does not activate the ETH RSS IPv4/TCP data stream. So we need to execute  `port config all rss ipv4-tcp` in testpmd.
+3.DPDK local patch that about vhost pmd is needed when testing Vhost asynchronous data path with testpmd.
 
 For more about dpdk-testpmd sample, please refer to the DPDK docments:
 https://doc.dpdk.org/guides/testpmd_app_ug/run_app.html
@@ -43,107 +46,105 @@ Prerequisites
 
 Topology
 --------
-    Test flow: TG-->NIC-->Vhost-->Virtio-->Vhost-->NIC-->TG
+	Test flow: TG-->NIC-->Vhost-->Virtio-->Vhost-->NIC-->TG
 
 Hardware
 --------
-    Supportted NICs: ALL
+	Supportted NICs: ALL
 
 Software
 --------
-    Trex:http://trex-tgn.cisco.com/trex/release/v2.26.tar.gz
+	Trex:http://trex-tgn.cisco.com/trex/release/v2.26.tar.gz
 
 General set up
 --------------
 1. Compile DPDK::
 
-    # CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=static <dpdk build dir>
-    # ninja -C <dpdk build dir> -j 110
-    For example:
-    CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=static x86_64-native-linuxapp-gcc
-    ninja -C x86_64-native-linuxapp-gcc -j 110
+	# CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=static <dpdk build dir>
+	# ninja -C <dpdk build dir> -j 110
+	For example:
+	CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=static x86_64-native-linuxapp-gcc
+	ninja -C x86_64-native-linuxapp-gcc -j 110
 
-2. Get the PCI device ID and DMA device ID of DUT, for example, 0000:18:00.0 is PCI device ID, 0000:00:04.0, 0000:00:04.1 are DMA device IDs::
+2. Get the PCI device ID and DMA device ID of DUT, for example, 0000:ca:00.0 is PCI device ID, 0000:00:01.0, 0000:00:01.1 are DMA device IDs::
 
-    <dpdk dir># ./usertools/dpdk-devbind.py -s
+	<dpdk dir># ./usertools/dpdk-devbind.py -s
 
-    Network devices using kernel driver
-    ===================================
-    0000:18:00.0 'Device 159b' if=ens785f0 drv=ice unused=vfio-pci
+	Network devices using kernel driver
+	===================================
+	0000:ca:00.0 'Device 159b' if=ens785f0 drv=ice unused=vfio-pci
 
-    DMA devices using kernel driver
-    ===============================
-    0000:00:04.0 'Sky Lake-E CBDMA Registers 2021' drv=ioatdma unused=vfio-pci
-    0000:00:04.1 'Sky Lake-E CBDMA Registers 2021' drv=ioatdma unused=vfio-pci
+	DMA devices using kernel driver
+	===============================
+	0000:00:01.0 'Sky Lake-E CBDMA Registers 2021' drv=ioatdma unused=vfio-pci
+	0000:00:01.1 'Sky Lake-E CBDMA Registers 2021' drv=ioatdma unused=vfio-pci
 
 Test case
 =========
 
 Common steps
 ------------
-1. Bind 1 NIC port and CBDMA devices to vfio-pci::
+1. Bind 1 NIC port and CBDMA device to vfio-pci::
 
-    <dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci <DUT port pci device id>
-    <dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci <DUT port DMA device id>
+	<dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci <DUT port pci device id>
+	<dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci <DUT port DMA device id>
 
-    For example, Bind 1 NIC port and 2 CBDMA devices::
-    ./usertools/dpdk-devbind.py -b vfio-pci 0000:00:18.0
-    ./usertools/dpdk-devbind.py -b vfio-pci 0000:00:04.0 0000:00:04.1
+	For example, Bind 1 NIC port and 2 CBDMA device::
+	./usertools/dpdk-devbind.py -b vfio-pci 0000:00:18.0
+	./usertools/dpdk-devbind.py -b vfio-pci 0000:00:01.0 0000:00:01.1
 
-2. Send tcp imix packets [64,1518] to NIC by traffic generator::
+2. Send tcp packets [64, 128, 256, 512, 1024, 1518] to NIC by traffic generator::
 
-    The imix packets include packet size [64, 128, 256, 512, 1024, 1518], and the format of packet is as follows.
-    +-------------+-------------+-------------+-------------+
-    | MAC         | MAC         | IPV4        | IPV4        |
-    | Src address | Dst address | Src address | Dst address |
-    |-------------|-------------|-------------|-------------|
-    | Random MAC  | Virtio mac  | Random IP   | Random IP   |
-    +-------------+-------------+-------------+-------------+
-    All the packets in this test plan use the Virtio mac: 00:11:22:33:44:10.
+	The imix packets include packet size [64, 128, 256, 512, 1024, 1518], and the format of packet is as follows.
+	+-------------+-------------+-------------+-------------+
+	| MAC         | MAC         | IPV4        | IPV4        |
+	| Src address | Dst address | Src address | Dst address |
+	|-------------|-------------|-------------|-------------|
+	| Random MAC  | Virtio mac  | Random IP   | Random IP   |
+	+-------------+-------------+-------------+-------------+
+	All the packets in this test plan use the Virtio mac: 00:11:22:33:44:10.
 
-Test Case 1: PVP split ring all path multi-queues vhost async operation with 1 to 1 mapping between vring and CBDMA virtual channels
-------------------------------------------------------------------------------------------------------------------------------------
+Test Case 1: PVP split ring all path multi-queues vhost async operation test with each tx/rx queue using one CBDMA device
+--------------------------------------------------------------------------------------------------------------------------
 This case tests split ring in each virtio path with multi-queues can work normally when vhost uses the asynchronous enqueue and dequeue operations
-and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as VA and PA mode have been tested.
+with each tx/rx queue using 1 CBDMA device. Both iova as VA and PA mode have been tested.
 
-1. Bind 1 NIC port and 4 CBDMA devices to vfio-pci, as common step 1.
+1. Bind 1 NIC port and 4 CBDMA device to vfio-pci, as common step 1.
 
 2. Launch vhost by below command::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost \
-	-a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=2,dmas=[txq0;txq1;rxq0;rxq1]' \
-	--iova=va -- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3]
-	testpmd> port config all rss ipv4-tcp
+	-a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 -a 0000:00:01.2 -a 0000:00:01.3 --max-pkt-len=9600 --tx-offloads=0x00008000\
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=2,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.1;rxq0@0000:00:01.2;rxq1@0000:00:01.3]' \
+	--iova=va -- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
 3. Launch virtio-user with inorder mergeable path::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=1,queues=2 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=1,queues=2 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
 
-4. Send tcp imix packets [64,1518] from packet generator as common step2, and then check the throughput can get expected data::
+4. Send imix packets [64, 128, 256, 512, 1024, 1518] from packet generator as common step2, and then check the throughput can get expected data::
 
-    testpmd> show port stats all
+	testpmd> show port stats all
 
 5. Stop vhost port, check that there are packets in both directions of RX and TX in each queue from vhost log::
 
-    testpmd> stop
+	testpmd> stop
 
 6. Restart vhost port and send imix packets again, then check the throuhput can get expected data::
 
-    testpmd> start
-    testpmd> show port stats all
+	testpmd> start
+	testpmd> show port stats all
 
 7. Relaunch virtio-user with mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=0,queues=2 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=0,queues=2 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -151,7 +152,7 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 8. Relaunch virtio-user with inorder non-mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=1,queues=2 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=1,queues=2 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -159,7 +160,7 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 9. Relaunch virtio-user with non-mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,queues=2 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,queues=2 \
 	-- -i --enable-hw-vlan-strip --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -171,7 +172,7 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 10. Relaunch virtio-user with vectorized path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,vectorized=1,queues=2 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,vectorized=1,queues=2 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -179,42 +180,38 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 11. Quit all testpmd and relaunch vhost with iova=pa by below command::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost \
-	-a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=2,dmas=[txq0;txq1;rxq0;rxq1]' \
-	--iova=pa -- -i --nb-cores=2 --txq=2 --rxq=2 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore12@0000:00:04.2,lcore12@0000:00:04.3]
-	testpmd> port config all rss ipv4-tcp
+	-a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 -a 0000:00:01.2 -a 0000:00:01.3 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=2,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.1;rxq0@0000:00:01.2;rxq1@0000:00:01.3],dma-ring-size=4096' \
+	--iova=pa -- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
-12. Rerun steps 3-6.
+12. Rerun step 3-6.
 
-Test Case 2: PVP split ring all path multi-queues vhost async operations with M to 1 mapping between vrings and CBDMA virtual channels
---------------------------------------------------------------------------------------------------------------------------------------
+Test Case 2: PVP split ring all path multi-queues vhost async operations test with one CBDMA device being shared among multiple tx/rx queues
+---------------------------------------------------------------------------------------------------------------------------------------------
 This case tests split ring in each virtio path with multi-queues can work normally when vhost uses the asynchronous enqueue and dequeue operations
-and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as VA and PA mode have been tested.
+with one CBDMA device being shared among multiple tx/rx queues. Both iova as VA and PA mode have been tested.
 
-1. Bind 1 NIC port and 4 CBDMA devices to vfio-pci, as common step 1.
+1. Bind 1 NIC port and 4 CBDMA device to vfio-pci, as common step 1.
 
 2. Launch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;txq7;rxq0;rxq1;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.1,lcore13@0000:00:04.2,lcore14@0000:00:04.3]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.0;txq2@0000:00:01.0;txq3@0000:00:01.0;txq4@0000:00:01.1;txq5@0000:00:01.1;txq6@0000:00:01.1;txq7@0000:00:01.1;rxq0@0000:00:01.0;rxq1@0000:00:01.0;rxq2@0000:00:01.0;rxq3@0000:00:01.0;rxq4@0000:00:01.1;rxq5@0000:00:01.1;rxq6@0000:00:01.1;rxq7@0000:00:01.1]' \
+	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
 3. Launch virtio-user with inorder mergeable path::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=1,queues=8 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=1,queues=8 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
 
-3. Send tcp imix packets [64,1518] from packet generator as common step2, and then check the throughput can get expected data::
+4. Send imix packets [64, 128, 256, 512, 1024, 1518] from packet generator as common step2, and then check the throughput can get expected data::
 
 	testpmd> show port stats all
 
@@ -230,7 +227,7 @@ and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as V
 7. Relaunch virtio-user with mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=0,queues=8 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=0,queues=8 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -238,7 +235,7 @@ and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as V
 8. Relaunch virtio-user with inorder non-mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=1,queues=8 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=1,queues=8 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -246,7 +243,7 @@ and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as V
 9. Relaunch virtio-user with non-mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,queues=8 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,queues=8 \
 	-- -i --enable-hw-vlan-strip --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -254,60 +251,54 @@ and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as V
 10. Relaunch virtio-user with vectorized path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,vectorized=1,queues=8 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,vectorized=1,queues=8 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
 
 11. Quit all testpmd and relaunch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;txq7;rxq0;rxq1;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.0,lcore13@0000:00:04.0,lcore14@0000:00:04.0]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 -a 0000:00:01.2 -a 0000:00:01.3 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.0;txq2@0000:00:01.1;txq3@0000:00:01.1;txq4@0000:00:01.2;txq5@0000:00:01.2;txq6@0000:00:01.3;txq7@0000:00:01.3;rxq0@0000:00:01.0;rxq1@0000:00:01.0;rxq2@0000:00:01.1;rxq3@0000:00:01.1;rxq4@0000:00:01.2;rxq5@0000:00:01.2;rxq6@0000:00:01.3;rxq7@0000:00:01.3]' \
+	--iova=va -- -i --nb-cores=6 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
-12. Rerun steps 7.
+12. Rerun step 7.
 
 13. Quit all testpmd and relaunch vhost with iova=pa by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;txq7;rxq0;rxq1;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=pa -- -i --nb-cores=8 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.0,lcore13@0000:00:04.0,lcore14@0000:00:04.0，lcore15@0000:00:04.0,lcore16@0000:00:04.0,lcore17@0000:00:04.0,lcore18@0000:00:04.0]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.0;txq2@0000:00:01.0;txq3@0000:00:01.0;txq4@0000:00:01.0;txq5@0000:00:01.0;txq6@0000:00:01.0;txq7@0000:00:01.0;rxq0@0000:00:01.0;rxq1@0000:00:01.0;rxq2@0000:00:01.0;rxq3@0000:00:01.0;rxq4@0000:00:01.0;rxq5@0000:00:01.0;rxq6@0000:00:01.0;rxq7@0000:00:01.0]' \
+	--iova=pa -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
-14. Rerun steps 8.
+14. Rerun step 8.
 
-Test Case 3: PVP split ring dynamic queue number vhost async operations with M to N mapping between vrings and CBDMA virtual channels
--------------------------------------------------------------------------------------------------------------------------------------
+Test Case 3: PVP split ring dynamic queue number vhost async operations with cbdma
+----------------------------------------------------------------------------------
 This case tests if the vhost-user async operation with cbdma channels can work normally when the queue number of split ring dynamic change. Both iova as VA and PA mode have been tested.
 
-1. Bind 1 NIC port and 8 CBDMA devices to vfio-pci, as common step 1.
+1. Bind 1 NIC port and 8 CBDMA device to vfio-pci, as common step 1.
 
-2. Launch vhost by below command(1:N mapping)::
+2. Launch vhost by below command::
 
-	<dpdk dir>#./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
-	--file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[txq0;txq1;rxq0;rxq1]' \
-	--iova=va -- -i --nb-cores=2 --txq=2 --rxq=2 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore12@0000:00:04.4,lcore12@0000:00:04.5,lcore12@0000:00:04.6,lcore12@0000:00:04.7]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir>#./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 \
+	--file-prefix=vhost --vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.1],dma-ring-size=32' \
+	--iova=va -- -i --nb-cores=2 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd>set fwd mac
 	testpmd>start
 
 3. Launch virtio-user by below command::
 
 	<dpdk dir>#./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=1,queues=8,server=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=1,queues=8,server=1 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd>set fwd csum
 	testpmd>start
 
-4. Send tcp imix packets[64,1518] from packet generator with random ip, check perforamnce can get target.
+4. Send imix packets [64, 128, 256, 512, 1024, 1518] from packet generator with random ip, check perforamnce can get target.
 
 5. Stop vhost port, check that there are packets in both directions of RX and TX in each queue from vhost log::
 
@@ -315,10 +306,9 @@ This case tests if the vhost-user async operation with cbdma channels can work n
 
 6. Quit and relaunch vhost without CBDMA::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:18:00.0 \
-	--file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1' \
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:ca:00.0 \
+	--file-prefix=vhost --vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1' \
 	--iova=va -- -i --nb-cores=1 --txq=1 --rxq=1 --txd=1024 --rxd=1024
-	testpmd> port config all rss ipv4-tcp
 	testpmd>set fwd mac
 	testpmd>start
 
@@ -326,90 +316,60 @@ This case tests if the vhost-user async operation with cbdma channels can work n
 
 8. Quit and relaunch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
-	--file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[rxq0;rxq1;rxq2;rxq3]' \
-	--iova=va -- -i --nb-cores=4 --txq=4 --rxq=4 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.1,lcore13@0000:00:04.2,lcore14@0000:00:04.3]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 \
+	--file-prefix=vhost --vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1,dmas=[rxq0@0000:00:01.0;rxq1@0000:00:01.0;rxq2@0000:00:01.1;rxq3@0000:00:01.1],dma-ring-size=2048' \
+	--iova=va -- -i --nb-cores=4 --txq=4 --rxq=4 --txd=1024 --rxd=1024
 	testpmd>set fwd mac
 	testpmd>start
 
 9. Rerun step 4-5.
 
-10. Quit and relaunch vhost with M:N mapping between vrings and CBDMA virtual channels::
+10. Quit and relaunch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
-	--file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=va -- -i --nb-cores=2 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore12@0000:00:04.1,lcore12@0000:00:04.2,lcore12@0000:00:04.3,lcore12@0000:00:04.4,lcore12@0000:00:04.5,lcore12@0000:00:04.6,lcore12@0000:00:04.7]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.0;txq2@0000:00:01.0;txq3@0000:00:01.0;txq4@0000:00:01.0;txq5@0000:00:01.0;txq6@0000:00:01.0;rxq2@0000:00:01.1;rxq3@0000:00:01.1;rxq4@0000:00:01.1;rxq5@0000:00:01.1;rxq6@0000:00:01.1;rxq7@0000:00:01.1],dma-ring-size=32' \
+	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd>set fwd mac
 	testpmd>start
 
 11. Rerun step 4-5.
 
-12. Quit and relaunch vhost with diff mapping between vrings and CBDMA virtual channels::
+12. Quit and relaunch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.0,lcore12@0000:00:04.1,lcore12@0000:00:04.2,lcore13@0000:00:04.3,lcore13@0000:00:04.4,lcore13@0000:00:04.5,lcore13@0000:00:04.6,lcore14@0000:00:04.4,lcore14@0000:00:04.5,lcore14@0000:00:04.6,lcore14@0000:00:04.7]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 -a 0000:00:01.2 -a 0000:00:01.3 -a 0000:00:01.4 -a 0000:00:01.5 -a 0000:00:01.6 -a 0000:00:01.7 \
+	-a 0000:80:01.0 -a 0000:80:01.1 -a 0000:80:01.2 -a 0000:80:01.3 -a 0000:80:01.4 -a 0000:80:01.5 -a 0000:80:01.6 -a 0000:80:01.7 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.1;txq2@0000:00:01.2;txq3@0000:00:01.3;txq4@0000:00:01.4;txq5@0000:00:01.5;txq6@0000:00:01.6;rxq2@0000:80:01.2;rxq3@0000:80:01.3;rxq4@0000:80:01.4;rxq5@0000:80:01.5;rxq6@0000:80:01.6;rxq7@0000:80:01.7]' \
+	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd>set fwd mac
 	testpmd>start
 
 13. Start vhost port and rerun step 4-5.
 
-14. Quit and relaunch virtio-user by below command::
+Test Case 4: PVP packed ring all path multi-queues vhost async operation test with each tx/rx queue using one CBDMA device
+---------------------------------------------------------------------------------------------------------------------------
+This case tests packed ring in each virtio path with multi-queues can work normally when vhost uses the asynchronous enqueue and dequeue operations.
+Both iova as VA and PA mode have been tested.
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=0,queues=8,server=1 \
-	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
-	testpmd>set fwd csum
-	testpmd>start
-
-15. Rerun step 4-5.
-
-16. Quit and relaunch vhost with iova=pa by below command::
-
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 \
-	-a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=pa -- -i --nb-cores=5 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.0,lcore13@0000:00:04.1,lcore13@0000:00:04.2,lcore14@0000:00:04.1,lcore14@0000:00:04.2,lcore15@0000:00:04.1,lcore15@0000:00:04.2]
-	testpmd> port config all rss ipv4-tcp
-	testpmd>set fwd mac
-	testpmd>start
-
-17. Rerun step 4-5.
-
-Test Case 4: PVP packed ring all path multi-queues vhost async operations with 1 to 1 mapping between vrings and CBDMA virtual channels
----------------------------------------------------------------------------------------------------------------------------------------
-This case tests packed ring in each virtio path with multi-queues can work normally when vhost uses the asynchronous enqueue and dequeue operations
-and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as VA and PA mode have been tested.
-
-1. Bind 1 NIC port and 4 CBDMA devices to vfio-pci, as common step 1.
+1. Bind 1 NIC port and 4 CBDMA device to vfio-pci, as common step 1.
 
 2. Launch vhost by below command::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost \
-	-a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=2,dmas=[txq0;txq1;rxq0;rxq1]' \
-	--iova=va -- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3]
-	testpmd> port config all rss ipv4-tcp
+	-a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 -a 0000:00:01.2 -a 0000:00:01.3 --max-pkt-len=9600 --tx-offloads=0x00008000\
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=2,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.1;rxq0@0000:00:01.2;rxq1@0000:00:01.3]' \
+	--iova=va -- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
 3. Launch virtio-user with inorder mergeable path::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=1,queues=2,packed_vq=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=1,queues=2,packed_vq=1 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
 
-4. Send tcp imix packets [64,1518] from packet generator as common step2, and then check the throughput can get expected data::
+4. Send imix packets [64, 128, 256, 512, 1024, 1518] from packet generator as common step2, and then check the throughput can get expected data::
 
 	testpmd> show port stats all
 
@@ -425,7 +385,7 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 7. Relaunch virtio-user with mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=0,queues=2,packed_vq=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=0,queues=2,packed_vq=1 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -433,7 +393,7 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 8. Relaunch virtio-user with inorder non-mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=1,queues=2,packed_vq=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=1,queues=2,packed_vq=1 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -441,7 +401,7 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 9. Relaunch virtio-user with non-mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,queues=2,packed_vq=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,queues=2,packed_vq=1 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -449,7 +409,7 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 10. Relaunch virtio-user with vectorized path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio --force-max-simd-bitwidth=512 \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,packed_vq=1,vectorized=1,queues=2 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,packed_vq=1,vectorized=1,queues=2 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -462,7 +422,7 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 11. Relaunch virtio-user with vectorized path and ring size is not power of 2, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio --force-max-simd-bitwidth=512 \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,packed_vq=1,vectorized=1,queues=2,queue_size=1025 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,packed_vq=1,vectorized=1,queues=2,queue_size=1025 \
 	-- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1025 --rxd=1025
 	testpmd> set fwd csum
 	testpmd> start
@@ -470,42 +430,38 @@ and the mapping between vrings and CBDMA virtual channels is 1:1. Both iova as V
 12. Quit all testpmd and relaunch vhost with iova=pa by below command::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost \
-	-a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=2,dmas=[txq0;txq1;rxq0;rxq1]' \
-	--iova=pa -- -i --nb-cores=2 --txq=2 --rxq=2 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore12@0000:00:04.2,lcore12@0000:00:04.3]
-	testpmd> port config all rss ipv4-tcp
+	-a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 -a 0000:00:01.2 -a 0000:00:01.3 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=2,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.1;rxq0@0000:00:01.2;rxq1@0000:00:01.3]' \
+	--iova=pa -- -i --nb-cores=1 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
-13. Rerun steps 3-6.
+13. Rerun step 11.
 
-Test Case 5: PVP packed ring all path multi-queues vhost async operations with M to 1 mapping between vrings and CBDMA virtual channels
----------------------------------------------------------------------------------------------------------------------------------------
-This case tests packed ring in each virtio path with multi-queues can work normally when vhost uses the asynchronous enqueue and dequeue operations
-and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as VA and PA mode have been tested.
+Test Case 5: PVP packed ring all path multi-queues vhost async operations test with one CBDMA device being shared among multiple tx/rx queues
+----------------------------------------------------------------------------------------------------------------------------------------------
+This case tests packed ring in each virtio path with multi-queues can work normally when vhost uses the asynchronous enqueue and dequeue operations.
+Both iova as VA and PA mode have been tested.
 
-1. Bind 1 NIC port and 4 CBDMA devices to vfio-pci, as common step 1.
+1. Bind 1 NIC port and 4 CBDMA device to vfio-pci, as common step 1.
 
 2. Launch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;txq7;rxq0;rxq1;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.1,lcore13@0000:00:04.2,lcore14@0000:00:04.3]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.0;txq2@0000:00:01.0;txq3@0000:00:01.0;txq4@0000:00:01.1;txq5@0000:00:01.1;txq6@0000:00:01.1;txq7@0000:00:01.1;rxq0@0000:00:01.1;rxq1@0000:00:01.1;rxq2@0000:00:01.1;rxq3@0000:00:01.1;rxq4@0000:00:01.0;rxq5@0000:00:01.0;rxq6@0000:00:01.0;rxq7@0000:00:01.0]' \
+	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
 3. Launch virtio-user with inorder mergeable path::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=1,queues=8,packed_vq=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=1,queues=8,packed_vq=1 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
 
-4. Send tcp imix packets [64,1518] from packet generator as common step2, and then check the throughput can get expected data::
+4. Send imix packets [64, 128, 256, 512, 1024, 1518] from packet generator as common step2, and then check the throughput can get expected data::
 
 	testpmd> show port stats all
 
@@ -521,7 +477,7 @@ and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as V
 7. Relaunch virtio-user with mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=0,queues=8,packed_vq=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=0,queues=8,packed_vq=1 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -529,7 +485,7 @@ and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as V
 8. Relaunch virtio-user with inorder non-mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=1,queues=8,packed_vq=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=1,queues=8,packed_vq=1 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -537,7 +493,7 @@ and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as V
 9. Relaunch virtio-user with non-mergeable path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,queues=8,packed_vq=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,queues=8,packed_vq=1 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -545,7 +501,7 @@ and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as V
 10. Relaunch virtio-user with vectorized path, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio --force-max-simd-bitwidth=512 \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,packed_vq=1,vectorized=1,queues=8 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,packed_vq=1,vectorized=1,queues=8 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
@@ -553,60 +509,54 @@ and the mapping between vrings and CBDMA virtual channels is M:1. Both iova as V
 11. Relaunch virtio-user with vectorized path and ring size is not power of 2, then repeat step 4-6::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio --force-max-simd-bitwidth=512 \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=0,in_order=0,packed_vq=1,vectorized=1,queues=8,queue_size=1025 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=0,in_order=0,packed_vq=1,vectorized=1,queues=8,queue_size=1025 \
 	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1025 --rxd=1025
 	testpmd> set fwd csum
 	testpmd> start
 
 12. Quit all testpmd and relaunch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;txq7;rxq0;rxq1;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.0,lcore13@0000:00:04.0,lcore14@0000:00:04.0]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 -a 0000:00:01.2 -a 0000:00:01.3 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.0;txq2@0000:00:01.1;txq3@0000:00:01.1;txq4@0000:00:01.2;txq5@0000:00:01.2;txq6@0000:00:01.3;txq7@0000:00:01.3;rxq0@0000:00:01.0;rxq1@0000:00:01.0;rxq2@0000:00:01.1;rxq3@0000:00:01.1;rxq4@0000:00:01.2;rxq5@0000:00:01.2;rxq6@0000:00:01.3;rxq7@0000:00:01.3]' \
+	--iova=va -- -i --nb-cores=6 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
-13. Rerun steps 7.
+13. Rerun steps 11.
 
 14. Quit all testpmd and relaunch vhost with iova=pa by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;txq7;rxq0;rxq1;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=pa -- -i --nb-cores=8 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.0,lcore13@0000:00:04.0,lcore14@0000:00:04.0,lcore15@0000:00:04.0,lcore16@0000:00:04.0,lcore17@0000:00:04.0,lcore18@0000:00:04.0]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.0;txq2@0000:00:01.0;txq3@0000:00:01.0;txq4@0000:00:01.0;txq5@0000:00:01.0;txq6@0000:00:01.0;txq7@0000:00:01.0;rxq0@0000:00:01.0;rxq1@0000:00:01.0;rxq2@0000:00:01.0;rxq3@0000:00:01.0;rxq4@0000:00:01.0;rxq5@0000:00:01.0;rxq6@0000:00:01.0;rxq7@0000:00:01.0]' \
+	--iova=pa -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd mac
 	testpmd> start
 
-15. Rerun steps 8.
+15. Rerun step 11.
 
-Test Case 6: PVP packed ring dynamic queue number vhost async operations with M to N mapping between vrings and CBDMA virtual channels
---------------------------------------------------------------------------------------------------------------------------------------
+Test Case 6: PVP packed ring dynamic queue number vhost async operations with cbdma
+--------------------------------------------------------------------------------------
 This case tests if the vhost-user async operation with cbdma channles can work normally when the queue number of split ring dynamic change. Both iova as VA and PA mode have been tested.
 
-1. Bind 1 NIC port and 8 CBDMA devices to vfio-pci, as common step 1.
+1. Bind 1 NIC port and 8 CBDMA device to vfio-pci, as common step 1.
 
 2. Launch vhost by below command(1:N mapping)::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
-	--file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[txq0;txq1;rxq0;rxq1]' \
-	--iova=va -- -i --nb-cores=2 --txq=2 --rxq=2 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore11@0000:00:04.2,lcore11@0000:00:04.3,lcore12@0000:00:04.4,lcore12@0000:00:04.5,lcore12@0000:00:04.6,lcore12@0000:00:04.7]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 \
+	--file-prefix=vhost --vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.1],dma-ring-size=32' \
+	--iova=va -- -i --nb-cores=2 --txq=2 --rxq=2 --txd=1024 --rxd=1024
 	testpmd>set fwd mac
 	testpmd>start
 
 3. Launch virtio-user by below command::
 
 	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=1,queues=8,server=1,packed_vq=1 \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost_net0,mrg_rxbuf=1,in_order=1,queues=8,server=1,packed_vq=1 \
 	-- -i  --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd> set fwd csum
 	testpmd> start
 
-4. Send tcp imix packets[64,1518] from packet generator with random ip, check perforamnce can get target.
+4. Send imix packets [64, 128, 256, 512, 1024, 1518] from packet generator with random ip, check perforamnce can get target.
 
 5. Stop vhost port, check that there are packets in both directions of RX and TX in each queue from vhost log::
 
@@ -614,10 +564,9 @@ This case tests if the vhost-user async operation with cbdma channles can work n
 
 6. Quit and relaunch vhost without CBDMA::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:18:00.0 \
-	--file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1' \
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:ca:00.0 \
+	--file-prefix=vhost --vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1' \
 	--iova=va -- -i --nb-cores=1 --txq=1 --rxq=1 --txd=1024 --rxd=1024
-	testpmd> port config all rss ipv4-tcp
 	testpmd>set fwd mac
 	testpmd>start
 
@@ -625,59 +574,31 @@ This case tests if the vhost-user async operation with cbdma channles can work n
 
 8. Quit and relaunch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 \
-	--file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[rxq0;rxq1;rxq2;rxq3]' \
-	--iova=va -- -i --nb-cores=4 --txq=4 --rxq=4 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.1,lcore13@0000:00:04.2,lcore14@0000:00:04.3]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 -a 0000:00:01.2 -a 0000:00:01.3 \
+	--file-prefix=vhost --vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1,dmas=[rxq0@0000:00:01.0;rxq1@0000:00:01.1;rxq2@0000:00:01.0;rxq3@0000:00:01.1],dma-ring-size=2048' \
+	--iova=va -- -i --nb-cores=4 --txq=4 --rxq=4 --txd=1024 --rxd=1024
 	testpmd>set fwd mac
 	testpmd>start
 
 9. Rerun step 4-5.
 
-10. Quit and relaunch vhost with M:N mapping between vrings and CBDMA virtual channels::
+10. Quit and relaunch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
-	--file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=va -- -i --nb-cores=2 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore11@0000:00:04.1,lcore12@0000:00:04.1,lcore12@0000:00:04.2,lcore12@0000:00:04.3,lcore12@0000:00:04.4,lcore12@0000:00:04.5,lcore12@0000:00:04.6,lcore12@0000:00:04.7]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.0;txq2@0000:00:01.0;txq3@0000:00:01.0;txq4@0000:00:01.0;txq5@0000:00:01.0;txq6@0000:00:01.0;rxq2@0000:00:01.1;rxq3@0000:00:01.1;rxq4@0000:00:01.1;rxq5@0000:00:01.1;rxq6@0000:00:01.1;rxq7@0000:00:01.1],dma-ring-size=32' \
+	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd>set fwd mac
 	testpmd>start
 
 11. Rerun step 4-5.
 
-12. Quit and relaunch vhost with diff mapping between vrings and CBDMA virtual channels::
+12. Quit and relaunch vhost by below command::
 
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 -a 0000:00:04.3 -a 0000:00:04.4 -a 0000:00:04.5 -a 0000:00:04.6 -a 0000:00:04.7 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.0,lcore12@0000:00:04.1,lcore12@0000:00:04.2,lcore13@0000:00:04.3,lcore13@0000:00:04.4,lcore13@0000:00:04.5,lcore13@0000:00:04.6,lcore14@0000:00:04.4,lcore14@0000:00:04.5,lcore14@0000:00:04.6,lcore14@0000:00:04.7]
-	testpmd> port config all rss ipv4-tcp
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:ca:00.0 -a 0000:00:01.0 -a 0000:00:01.1 -a 0000:00:01.2 -a 0000:00:01.3 -a 0000:00:01.4 -a 0000:00:01.5 -a 0000:00:01.6 -a 0000:00:01.7 \
+	-a 0000:80:01.0 -a 0000:80:01.1 -a 0000:80:01.2 -a 0000:80:01.3 -a 0000:80:01.4 -a 0000:80:01.5 -a 0000:80:01.6 -a 0000:80:01.7 \
+	--vdev 'net_vhost0,iface=./vhost_net0,queues=8,client=1,dmas=[txq0@0000:00:01.0;txq1@0000:00:01.1;txq2@0000:00:01.2;txq3@0000:00:01.3;txq4@0000:00:01.4;txq5@0000:00:01.5;txq6@0000:00:01.6;rxq2@0000:80:01.2;rxq3@0000:80:01.3;rxq4@0000:80:01.4;rxq5@0000:80:01.5;rxq6@0000:80:01.6;rxq7@0000:80:01.7]' \
+	--iova=va -- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
 	testpmd>set fwd mac
 	testpmd>start
 
 13. Start vhost port and rerun step 4-5.
-
-14. Quit and relaunch virtio-user by below command::
-
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-6 --no-pci --file-prefix=virtio \
-	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=vhost-net0,mrg_rxbuf=1,in_order=0,packed=on,queues=8,server=1 \
-	-- -i --nb-cores=4 --txq=8 --rxq=8 --txd=1024 --rxd=1024
-	testpmd>set fwd csum
-	testpmd>start
-
-15. Rerun step 4-5.
-
-16. Quit and relaunch vhost with iova=pa by below command::
-
-	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 10-18 --file-prefix=vhost -a 0000:18:00.0 \
-	-a 0000:00:04.0 -a 0000:00:04.1 -a 0000:00:04.2 \
-	--vdev 'net_vhost0,iface=vhost-net0,queues=8,client=1,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
-	--iova=pa -- -i --nb-cores=5 --txq=8 --rxq=8 --txd=1024 --rxd=1024 \
-	--lcore-dma=[lcore11@0000:00:04.0,lcore12@0000:00:04.0,lcore13@0000:00:04.1,lcore13@0000:00:04.2,lcore14@0000:00:04.1,lcore14@0000:00:04.2,lcore15@0000:00:04.1,lcore15@0000:00:04.2]
-	testpmd> port config all rss ipv4-tcp
-	testpmd>set fwd mac
-	testpmd>start
-
-17. Rerun step 4-5.
