diff --git a/test_plans/vm2vm_virtio_pmd_test_plan.rst b/test_plans/vm2vm_virtio_pmd_test_plan.rst
index 903695ff..3074cfde 100644
--- a/test_plans/vm2vm_virtio_pmd_test_plan.rst
+++ b/test_plans/vm2vm_virtio_pmd_test_plan.rst
@@ -34,22 +34,69 @@
 vm2vm vhost-user/virtio-pmd test plan
 =====================================
 
-This test plan includes vm2vm mergeable, normal and vector_rx path test with virtio 0.95 and virtio 1.0,
-also add mergeable and normal path test with virtio 1.1. Specially, three mergeable path cases check the
-payload of each packets are valid by using pdump.
-Note: Blow cases 9-11 which have cbdma usage should add dpdk local path to support async vhostpmd.
+Description
+===========
 
-Test flow
+This test plan includes vm2vm mergeable, normal and vector_rx path test with virtio 0.95 and virtio 1.0.
+Since qemu 4.2.0, Packed virtqueue mergeable path and Packed virtqueue non-mergeable path can be supported.
+then also add mergeable and non-mergeable path test with virtio 1.1.
+
+For more about dpdk-testpmd sample, please refer to the DPDK docments:
+https://doc.dpdk.org/guides/testpmd_app_ug/run_app.html
+
+For virtio-user vdev parameter, you can refer to the DPDK docments:
+https://doc.dpdk.org/guides/nics/virtio.html#virtio-paths-selection-and-usage.
+
+Prerequisites
+=============
+
+Topology
+--------
+      Test flow: Virtio-pmd-->Vhost-user-->Testpmd-->Vhost-user-->Virtio-pmd
+
+Hardware
+--------
+      Supportted NICs: ALL
+
+Software
+--------
+      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=<dpdk build dir>
+      # ninja -C <dpdk build dir> -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 is DMA device ID::
+
+      <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
+
+      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
+
+Test case
 =========
-Virtio-pmd <-> Vhost-user <-> Testpmd <-> Vhost-user <-> Virtio-pmd
+
+Common steps
+------------
 
 Test Case 1: VM2VM vhost-user/virtio-pmd with vector_rx path
 ============================================================
+This case uses testpmd and QEMU to test virtio0.95 vector_rx path and forward packets between 2 VMs.
 
-1. Bind one physical nic port to vfio-pci, then launch the testpmd by below commands::
+1. Launch the testpmd by below commands::
 
-    rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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>set fwd mac
     testpmd>start
 
@@ -64,7 +111,8 @@ Test Case 1: VM2VM vhost-user/virtio-pmd with vector_rx path
     -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=true,mrg_rxbuf=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :10
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=true,mrg_rxbuf=off,\
+    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 4 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -75,7 +123,8 @@ Test Case 1: VM2VM vhost-user/virtio-pmd with vector_rx path
     -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=true,mrg_rxbuf=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=true,mrg_rxbuf=off,\
+    csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
 
 3. On VM1, bind vdev with vfio-pci driver,then run testpmd, set rxonly for virtio1, [0000:xx.00] is [Bus,Device,Function] of virtio-net::
 
@@ -100,11 +149,14 @@ Test Case 1: VM2VM vhost-user/virtio-pmd with vector_rx path
 
 Test Case 2: VM2VM vhost-user/virtio-pmd with normal path
 =========================================================
+This case uses testpmd and QEMU to test virtio0.95 normal path and forward packets between 2 VMs.
 
-1. Bind one physical nic port to vfio-pci, then launch the testpmd by below commands::
+1. Launch the testpmd by below commands::
 
     rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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>set fwd mac
     testpmd>start
 
@@ -119,7 +171,8 @@ Test Case 2: VM2VM vhost-user/virtio-pmd with normal path
     -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=true,mrg_rxbuf=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :10
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=true,mrg_rxbuf=off,\
+    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 4 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -130,7 +183,8 @@ Test Case 2: VM2VM vhost-user/virtio-pmd with normal path
     -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=true,mrg_rxbuf=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=true,mrg_rxbuf=off,\
+    csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
 
 3. On VM1, bind vdev with vfio-pci driver,then run testpmd, set rxonly for virtio1 ::
 
@@ -155,11 +209,14 @@ Test Case 2: VM2VM vhost-user/virtio-pmd with normal path
 
 Test Case 3: VM2VM vhost-user/virtio1.0-pmd with vector_rx path
 ===============================================================
+This case uses testpmd and QEMU to test virtio1.0 vector_rx path and forward packets between 2 VMs.
 
-1. Bind one physical nic port to vfio-pci, then launch the testpmd by below commands::
+1. Launch the testpmd by below commands::
 
     rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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>set fwd mac
     testpmd>start
 
@@ -174,7 +231,8 @@ Test Case 3: VM2VM vhost-user/virtio1.0-pmd with vector_rx path
     -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=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :10
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=off,\
+    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 4 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -185,7 +243,8 @@ Test Case 3: VM2VM vhost-user/virtio1.0-pmd with vector_rx path
     -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=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=off,\
+    csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
 
 3. On VM1, bind vdev with vfio-pci driver,then run testpmd, set rxonly for virtio1, [0000:xx.00] is [Bus,Device,Function] of virtio-net::
 
@@ -210,11 +269,14 @@ Test Case 3: VM2VM vhost-user/virtio1.0-pmd with vector_rx path
 
 Test Case 4: VM2VM vhost-user/virtio1.0-pmd with normal path
 ============================================================
+This case uses testpmd and QEMU to test virtio1.0 normal path and forward packets between 2 VMs.
 
-1. Bind one physical nic port to vfio-pci, then launch the testpmd by below commands::
+1. Launch the testpmd by below commands::
 
     rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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>set fwd mac
     testpmd>start
 
@@ -229,7 +291,8 @@ Test Case 4: VM2VM vhost-user/virtio1.0-pmd with normal path
     -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=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :10
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=off,\
+    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 4 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -240,7 +303,8 @@ Test Case 4: VM2VM vhost-user/virtio1.0-pmd with normal path
     -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=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=off,\
+    csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
 
 3. On VM1, bind vdev with vfio-pci driver,then run testpmd, set rxonly for virtio1 ::
 
@@ -265,10 +329,13 @@ Test Case 4: VM2VM vhost-user/virtio1.0-pmd with normal path
 
 Test Case 5: VM2VM vhost-user/virtio-pmd mergeable path with payload valid check
 ================================================================================
+This case uses testpmd and QEMU to test virtio0.95 mergeable path and forward packets between 2 VMs and verify receive packets payload.
 
-1. Bind virtio with vfio-pci driver, launch the testpmd by below commands::
+1. Launch the testpmd by below commands::
 
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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>set fwd mac
     testpmd>start
 
@@ -283,7 +350,8 @@ Test Case 5: VM2VM vhost-user/virtio-pmd mergeable path with payload valid check
     -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=true,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :10
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=true,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 4 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -294,7 +362,8 @@ Test Case 5: VM2VM vhost-user/virtio-pmd mergeable path with payload valid check
     -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=true,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=true,mrg_rxbuf=on,\
+    csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
 
 3. On VM1, enable pcap lib in dpdk code and recompile::
 
@@ -353,10 +422,13 @@ Test Case 5: VM2VM vhost-user/virtio-pmd mergeable path with payload valid check
 
 Test Case 6: VM2VM vhost-user/virtio1.0-pmd mergeable path with payload valid check
 ===================================================================================
+This case uses testpmd and QEMU to test virtio1.0 mergeable path and forward packets between 2 VMs and verify receive packets payload.
 
-1. Bind virtio with vfio-pci driver, launch the testpmd by below commands::
+1. Launch the testpmd by below commands::
 
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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>set fwd mac
     testpmd>start
 
@@ -371,7 +443,8 @@ Test Case 6: VM2VM vhost-user/virtio1.0-pmd mergeable path with payload valid ch
     -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 -vnc :10
+    -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 4 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -382,7 +455,8 @@ Test Case 6: VM2VM vhost-user/virtio1.0-pmd mergeable path with payload valid ch
     -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 -vnc :12
+    -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 -vnc :12
 
 3. On VM1, enable pcap lib in dpdk code and recompile::
 
@@ -441,10 +515,13 @@ Test Case 6: VM2VM vhost-user/virtio1.0-pmd mergeable path with payload valid ch
 
 Test Case 7: VM2VM vhost-user/virtio1.1-pmd mergeable path with payload valid check
 ===================================================================================
+This case uses testpmd and QEMU to test virtio1.1 mergeable path and forward packets between 2 VMs and verify receive packets payload.
 
-1. Bind virtio with vfio-pci driver, launch the testpmd by below commands::
+1. Launch the testpmd by below commands::
 
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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>set fwd mac
     testpmd>start
 
@@ -459,7 +536,8 @@ Test Case 7: VM2VM vhost-user/virtio1.1-pmd mergeable path with payload valid ch
     -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
+    -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 4 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -470,7 +548,8 @@ Test Case 7: VM2VM vhost-user/virtio1.1-pmd mergeable path with payload valid ch
     -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
+    -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, enable pcap lib in dpdk code and recompile::
 
@@ -529,11 +608,14 @@ Test Case 7: VM2VM vhost-user/virtio1.1-pmd mergeable path with payload valid ch
 
 Test Case 8: VM2VM vhost-user/virtio1.1-pmd with normal path
 ============================================================
+This case uses testpmd and QEMU to test virtio1.1 normal path and forward packets between 2 VMs.
 
-1. Bind one physical nic port to vfio-pci, then launch the testpmd by below commands::
+1. Launch the testpmd by below commands::
 
     rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xc0000 -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>set fwd mac
     testpmd>start
 
@@ -548,7 +630,8 @@ Test Case 8: VM2VM vhost-user/virtio1.1-pmd with normal path
     -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=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :10
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=off,\
+    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 4 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -559,7 +642,8 @@ Test Case 8: VM2VM vhost-user/virtio1.1-pmd with normal path
     -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=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :12
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=off,\
+    csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :12
 
 3. On VM1, bind vdev with vfio-pci driver,then run testpmd, set rxonly for virtio1 ::
 
@@ -582,230 +666,3 @@ Test Case 8: VM2VM vhost-user/virtio1.1-pmd with normal path
     RX-pps:            xxx
     TX-pps:            xxx
 
-Test Case 9: VM2VM virtio-pmd split ring mergeable path 8 queues CBDMA enable with server mode stable test
-==========================================================================================================
-
-1. Bind 16 cbdma channels to vfio-pci driver, then launch the testpmd with 2 vhost port and 8 queues by below commands::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -n 4 --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas=[txq0@0000:00:04.0;txq1@0000:00:04.1;txq2@0000:00:04.2;txq3@0000:00:04.3;txq4@0000:00:04.4;txq5@0000:00:04.5;txq6@0000:00:04.6;txq7@0000:00:04.7]' \
-    --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0@0000:80:04.0;txq1@0000:80:04.1;txq2@0000:80:04.2;txq3@0000:80:04.3;txq4@0000:80:04.4;txq5@0000:80:04.5;txq6@0000:80:04.6;txq7@0000:80:04.7]'  -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=8 --txq=8
-    testpmd>vhost enable tx all
-    testpmd>start
-
-2. Launch VM1 and VM2 using qemu5.2.0::
-
-    taskset -c 6-16 /home/qemu-install/qemu-5.2/bin/qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 9 -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/ubuntu20-04.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,server \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce,queues=8 \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on -vnc :10
-
-    taskset -c 17-27 /home/qemu-install/qemu-5.2/bin/qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 9 -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/ubuntu20-04-2.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,server \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce,queues=8 \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on -vnc :12
-
-3. On VM1 and VM2, bind virtio device with vfio-pci driver::
-
-    modprobe vfio
-    modprobe vfio-pci
-    echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
-    ./usertools/dpdk-devbind.py --force --bind=vfio-pci 0000:00:05.0
-
-4. Launch testpmd in VM1::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txq=8 --rxq=8 --txd=1024 --rxd=1024 --max-pkt-len=9600 --rx-offloads=0x00002000
-    testpmd>set mac fwd
-    testpmd>start
-
-5. Launch testpmd in VM2, sent imix pkts from VM2::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txq=8 --rxq=8 --txd=1024 --rxd=1024 --max-pkt-len=9600 --rx-offloads=0x00002000
-    testpmd>set mac fwd
-    testpmd>set txpkts 64,256,512,1024,2000,64,256,512,1024,2000
-    testpmd>start tx_first 1
-
-6. Check imix packets can looped between two VMs for 1 mins and 8 queues all have packets rx/tx::
-
-    testpmd>show port stats all
-    testpmd>stop
-
-7. Relaunch and start vhost side testpmd with below cmd::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -n 4 --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas=[txq0@0000:00:04.0;txq1@0000:00:04.1;txq2@0000:00:04.2;txq3@0000:00:04.3;txq4@0000:00:04.4;txq5@0000:00:04.5;txq6@0000:00:04.6;txq7@0000:00:04.7]' \
-    --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0@0000:80:04.0;txq1@0000:80:04.1;txq2@0000:80:04.2;txq3@0000:80:04.3;txq4@0000:80:04.4;txq5@0000:80:04.5;txq6@0000:80:04.6;txq7@0000:80:04.7]'  -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=8 --txq=8
-    testpmd>start
-
-8. Send pkts by testpmd in VM2, check imix packets can looped between two VMs for 1 mins and 8 queues all have packets rx/tx::
-
-    testpmd>stop
-    testpmd>start tx_first 1
-    testpmd>show port stats all
-    testpmd>stop
-
-9. Rerun step 7-8 for 10 times.
-
-Test Case 10: VM2VM virtio-pmd split ring mergeable path dynamic queue size CBDMA enable with server mode test
-==============================================================================================================
-
-1. Bind 16 cbdma channels to vfio-pci driver, then launch the testpmd with 2 vhost ports below commands::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -n 4 --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas=[txq0@0000:00:04.0;txq1@0000:00:04.1;txq2@0000:00:04.2;txq3@0000:00:04.3;txq4@0000:00:04.4;txq5@0000:00:04.5;txq6@0000:00:04.6;txq7@0000:00:04.7]' \
-    --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0@0000:80:04.0;txq1@0000:80:04.1;txq2@0000:80:04.2;txq3@0000:80:04.3;txq4@0000:80:04.4;txq5@0000:80:04.5;txq6@0000:80:04.6;txq7@0000:80:04.7]'  -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=4 --txq=4
-    testpmd>vhost enable tx all
-    testpmd>start
-
-2. Launch VM1 and VM2 using qemu5.2.0::
-
-    taskset -c 6-16 /home/qemu-install/qemu-5.2/bin/qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 9 -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/ubuntu20-04.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,server \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce,queues=8 \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on -vnc :10
-
-    taskset -c 17-27 /home/qemu-install/qemu-5.2/bin/qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 9 -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/ubuntu20-04-2.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,server \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce,queues=8 \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on -vnc :12
-
-3. On VM1 and VM2, bind virtio device with vfio-pci driver::
-
-    modprobe vfio
-    modprobe vfio-pci
-    echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
-    ./usertools/dpdk-devbind.py --force --bind=vfio-pci 0000:00:05.0
-
-4. Launch testpmd in VM1::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txq=8 --rxq=8 --txd=1024 --rxd=1024 --max-pkt-len=9600 --rx-offloads=0x00002000
-    testpmd>set mac fwd
-    testpmd>start
-
-5. Launch testpmd in VM2 and send imix pkts, check imix packets can looped between two VMs for 1 mins and 4 queues (queue0 to queue3) have packets rx/tx::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txq=8 --rxq=8 --txd=1024 --rxd=1024 --max-pkt-len=9600 --rx-offloads=0x00002000
-    testpmd>set mac fwd
-    testpmd>set txpkts 64,256,512,1024,2000,64,256,512,1024,2000
-    testpmd>start tx_first 32
-    testpmd>show port stats all
-    testpmd>stop
-
-6. Relaunch and start vhost side testpmd with eight queues::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -n 4 --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas=[txq0@0000:00:04.0;txq1@0000:00:04.1;txq2@0000:00:04.2;txq3@0000:00:04.3;txq4@0000:00:04.4;txq5@0000:00:04.5;txq6@0000:00:04.6;txq7@0000:00:04.7]' \
-    --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0@0000:80:04.0;txq1@0000:80:04.1;txq2@0000:80:04.2;txq3@0000:80:04.3;txq4@0000:80:04.4;txq5@0000:80:04.5;txq6@0000:80:04.6;txq7@0000:80:04.7]'  -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=8 --txq=8
-    testpmd>start
-
-7. Send pkts by testpmd in VM2, check imix packets can looped between two VMs for 1 mins and 8 queues all have packets rx/tx::
-
-    testpmd>stop
-    testpmd>start tx_first 32
-    testpmd>show port stats all
-    testpmd>stop
-
-8. Rerun step 6-7 for 10 times.
-
-Test Case 11: VM2VM virtio-pmd packed ring mergeable path 8 queues CBDMA enable test
-=====================================================================================
-
-1. Bind 16 cbdma channels to vfio-pci driver, then launch the testpmd with 2 vhost port and 8 queues by below commands::
-
-    rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -n 4 --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas=[txq0@0000:00:04.0;txq1@0000:00:04.1;txq2@0000:00:04.2;txq3@0000:00:04.3;txq4@0000:00:04.4;txq5@0000:00:04.5;txq6@0000:00:04.6;txq7@0000:00:04.7]' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=8,dmas=[txq0@0000:80:04.0;txq1@0000:80:04.1;txq2@0000:80:04.2;txq3@0000:80:04.3;txq4@0000:80:04.4;txq5@0000:80:04.5;txq6@0000:80:04.6;txq7@0000:80:04.7]'  -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=8 --txq=8
-    testpmd>vhost enable tx all
-    testpmd>start
-
-2. Launch VM1 and VM2 with qemu 5.2.0::
-
-    taskset -c 6-16 qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 9 -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/ubuntu20-04.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,queues=8 \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on,packed=on -vnc :10
-
-    taskset -c 17-27 qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 9 -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/ubuntu20-04-2.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,queues=8 \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on,packed=on -vnc :12
-
-3. On VM1 and VM2, bind virtio device with vfio-pci driver::
-
-    modprobe vfio
-    modprobe vfio-pci
-    echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
-    ./usertools/dpdk-devbind.py --force --bind=vfio-pci 0000:00:05.0
-
-4. Launch testpmd in VM1::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txq=8 --rxq=8 --txd=1024 --rxd=1024 --max-pkt-len=9600 --rx-offloads=0x00002000
-    testpmd>set mac fwd
-    testpmd>start
-
-5. Launch testpmd in VM2 and send imix pkts, check imix packets can looped between two VMs for 1 mins and 8 queues all have packets rx/tx::
-
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txq=8 --rxq=8 --txd=1024 --rxd=1024 --max-pkt-len=9600 --rx-offloads=0x00002000
-    testpmd>set mac fwd
-    testpmd>set txpkts 64,256,512,1024,20000,64,256,512,1024,20000
-    testpmd>start tx_first 32
-    testpmd>show port stats all
-    testpmd>stop
-
-6. Quit VM2 and relaunch VM2 with split ring::
-
-    taskset -c 6-16 qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 9 -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/ubuntu20-04.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,queues=8 \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on -vnc :10
-
-7. Bind virtio device with vfio-pci driver, launch testpmd in VM2 and send imix pkts, check imix packets can looped between two VMs for 1 mins and 8 queues all have packets rx/tx::
-
-    modprobe vfio
-    modprobe vfio-pci
-    echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
-    ./usertools/dpdk-devbind.py --force --bind=vfio-pci 0000:00:05.0
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txq=8 --rxq=8 --txd=1024 --rxd=1024 --max-pkt-len=9600 --rx-offloads=0x00002000
-    testpmd>set mac fwd
-    testpmd>set txpkts 64,256,512,1024,20000,64,256,512,1024,20000
-    testpmd>start tx_first 32
-    testpmd>show port stats all
-    testpmd>stop
