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=====================================
vm2vm vhost-user/virtio-pmd test plan
=====================================

This test plan includes vm2vm vhost-user/virtio-pmd(0.95) mergeable ,normal and vector_rx path test, and vm2vm vhost/virtio-pmd(1.0) mergeable,
normal and vector_rx path test. Specially, two mergeable path test check the payload of each packets are valid by using pdump.

Prerequisites
=============

Enable pcap lib in dpdk code and recompile::

    --- a/config/common_base
    +++ b/config/common_base
    @@ -492,7 +492,7 @@ CONFIG_RTE_LIBRTE_PMD_NULL=y
     #
     # Compile software PMD backed by PCAP files
     #
    -CONFIG_RTE_LIBRTE_PMD_PCAP=n
    +CONFIG_RTE_LIBRTE_PMD_PCAP=y

Test flow
=========
Virtio-pmd <-> Vhost-user <-> Testpmd <-> Vhost-user <-> Virtio-pmd

Test Case 1: VM2VM vhost-user/virtio-pmd with vector_rx path
============================================================

1. Bind one physical nic port to igb_uio, then launch the testpmd by below commands::

     rm -rf vhost-net*
    ./testpmd -c 0xc0000 -n 4 --socket-mem 2048,2048 --legacy-mem --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

2. Launch VM1 and VM2, mrg_rxbuf=off to disable mergeable::

    qemu-system-x86_64 -name us-vhost-vm0 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-1.img  \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6004-:22 \
     -chardev socket,id=char0,path=./vhost-net0 -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:01,netdev=mynet1,mrg_rxbuf=off,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on \
     -vnc :12 -daemonize

    qemu-system-x86_64 -name us-vhost-vm1 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-2.img \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6005-:22 \
     -chardev socket,id=char1,path=./vhost-net1 -netdev type=vhost-user,id=mynet2,chardev=char1,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=mynet2,mrg_rxbuf=off,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on  \
     -vnc :11 -daemonize

3. On VM1, bind vdev with igb_uio driver,then run testpmd, set rxonly for virtio1::

    ./testpmd -c 0x3 -n 4 -- -i --txd=1024 --rxd=1024
    testpmd>set fwd rxonly
    testpmd>start

4. On VM2, bind vdev with igb_uio driver,then run testpmd, set txonly for virtio2 and send 64B packets::

    ./testpmd -c 0x3 -n 4 -- -i --txd=1024 --rxd=1024
    testpmd>set fwd txonly
    testpmd>set txpkts 64
    testpmd>start tx_first 32

5. Check the performance at vhost testpmd to see the tx/rx rate with 64B packet size::

    testpmd>show port stats all
    xxxxx
    Throughput (since last show)
    RX-pps:            xxx
    TX-pps:            xxx

Test Case 2: VM2VM vhost-user/virtio-pmd with normal path
=========================================================

1. Bind one physical nic port to igb_uio, then launch the testpmd by below commands::

     rm -rf vhost-net*
    ./testpmd -c 0xc0000 -n 4 --socket-mem 2048,2048 --legacy-mem --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

2. Launch VM1 and VM2, mrg_rxbuf=off to disable mergeable::

    qemu-system-x86_64 -name us-vhost-vm0 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-1.img  \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6004-:22 \
     -chardev socket,id=char0,path=./vhost-net0 -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:01,netdev=mynet1,mrg_rxbuf=off,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on \
     -vnc :12 -daemonize

    qemu-system-x86_64 -name us-vhost-vm1 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-2.img \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6005-:22 \
     -chardev socket,id=char1,path=./vhost-net1 -netdev type=vhost-user,id=mynet2,chardev=char1,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=mynet2,mrg_rxbuf=off,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on  \
     -vnc :11 -daemonize

3. On VM1, bind vdev with igb_uio driver,then run testpmd, set rxonly for virtio1 ::

    ./testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txd=1024 --rxd=1024
    testpmd>set fwd rxonly
    testpmd>start

4. On VM2, bind vdev with igb_uio driver,then run testpmd, set rxonly for virtio2 and send 64B packets ::

    ./testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txd=1024 --rxd=1024
    testpmd>set fwd txonly
    testpmd>set txpkts 64
    testpmd>start tx_first 32

5. Check the performance at vhost testpmd to see the tx/rx rate with 64B packet size::

    testpmd>show port stats all
    xxxxx
    Throughput (since last show)
    RX-pps:            xxx
    TX-pps:            xxx

Test Case 3: VM2VM vhost-user/virtio1.0-pmd with vector_rx path
===============================================================

1. Bind one physical nic port to igb_uio, then launch the testpmd by below commands::

     rm -rf vhost-net*
    ./testpmd -c 0xc0000 -n 4 --socket-mem 2048,2048 --legacy-mem --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

2. Launch VM1 and VM2, note add "disable-modern=false" to enable virtio 1.0::

    qemu-system-x86_64 -name us-vhost-vm1 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-1.img  \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6004-:22 \
     -chardev socket,id=char0,path=./vhost-net0 -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:01,netdev=mynet1,disable-modern=false,mrg_rxbuf=off,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on \
     -vnc :12 -daemonize

    qemu-system-x86_64 -name us-vhost-vm2 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-2.img \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6005-:22 \
     -chardev socket,id=char1,path=./vhost-net1 -netdev type=vhost-user,id=mynet2,chardev=char1,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=mynet2,disable-modern=false,mrg_rxbuf=off,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on  \
     -vnc :11 -daemonize

3. On VM1, bind vdev with igb_uio driver,then run testpmd, set rxonly for virtio1 ::

    ./testpmd -c 0x3 -n 4 -- -i --txd=1024 --rxd=1024
    testpmd>set fwd rxonly
    testpmd>start

4. On VM2, bind vdev with igb_uio driver,then run testpmd, set txonly for virtio2 ::

    ./testpmd -c 0x3 -n 4 -- -i --txd=1024 --rxd=1024
    testpmd>set fwd txonly
    testpmd>set txpkts 64
    testpmd>start tx_first 32

5. Check the performance at vhost testpmd to see the tx/rx rate with 64B packet size::

    testpmd>show port stats all
    xxxxx
    Throughput (since last show)
    RX-pps:            xxx
    TX-pps:            xxx

Test Case 4: VM2VM vhost-user/virtio1.0-pmd with normal path
============================================================

1. Bind one physical nic port to igb_uio, then launch the testpmd by below commands::

     rm -rf vhost-net*
    ./testpmd -c 0xc0000 -n 4 --socket-mem 2048,2048 --legacy-mem --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

2. Launch VM1 and VM2, note add "disable-modern=false" to enable virtio 1.0::

    qemu-system-x86_64 -name us-vhost-vm1 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-1.img  \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6004-:22 \
     -chardev socket,id=char0,path=./vhost-net0 -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:01,netdev=mynet1,disable-modern=false,mrg_rxbuf=off,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on \
     -vnc :12 -daemonize

    qemu-system-x86_64 -name us-vhost-vm2 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-2.img \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6005-:22 \
     -chardev socket,id=char1,path=./vhost-net1 -netdev type=vhost-user,id=mynet2,chardev=char1,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=mynet2,disable-modern=false,mrg_rxbuf=off,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on  \
     -vnc :11 -daemonize

3. On VM1, bind vdev with igb_uio driver,then run testpmd, set rxonly for virtio1 ::

    ./testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txd=1024 --rxd=1024
    testpmd>set fwd rxonly
    testpmd>start

4. On VM2, bind vdev with igb_uio driver,then run testpmd, set txonly for virtio2 ::

    ./testpmd -c 0x3 -n 4 -- -i --tx-offloads=0x00 --enable-hw-vlan-strip --txd=1024 --rxd=1024
    testpmd>set fwd txonly
    testpmd>set txpkts 64
    testpmd>start tx_first 32

5. Check the performance at vhost testpmd to see the tx/rx rate with 64B packet size::

    testpmd>show port stats all
    xxxxx
    Throughput (since last show)
    RX-pps:            xxx
    TX-pps:            xxx

Test Case 5: VM2VM vhost-user/virtio-pmd mergeable path with payload valid check
================================================================================

1. Bind virtio with igb_uio driver, launch the testpmd by below commands::

    ./testpmd -c 0xc0000 -n 4 --socket-mem 2048,2048 --legacy-mem --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

2. Launch VM1 and VM2, mrg_rxbuf=on to enable mergeable path::

    qemu-system-x86_64 -name us-vhost-vm1 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-1.img  \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6004-:22 \
     -chardev socket,id=char0,path=./vhost-net0 -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:01,netdev=mynet1,mrg_rxbuf=on,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on \
     -vnc :12 -daemonize

    qemu-system-x86_64 -name us-vhost-vm2 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16.img \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6003-:22 \
     -chardev socket,id=char1,path=./vhost-net1 -netdev type=vhost-user,id=mynet2,chardev=char1,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=mynet2,mrg_rxbuf=on,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on \
     -vnc :11 -daemonize

3. On VM1, enable pcap lib in dpdk code and recompile::

    diff --git a/config/common_base b/config/common_base
    index 6b96e0e80..0f7d22f22 100644
    --- a/config/common_base
    +++ b/config/common_base
    @@ -492,7 +492,7 @@ CONFIG_RTE_LIBRTE_PMD_NULL=y
     #
     # Compile software PMD backed by PCAP files
     #
    -CONFIG_RTE_LIBRTE_PMD_PCAP=n
    +CONFIG_RTE_LIBRTE_PMD_PCAP=y

4. Bind virtio with igb_uio driver,then run testpmd, set rxonly mode for virtio-pmd on VM1::

    ./testpmd -c 0x3 -n 4 --file-prefix=test -- -i --txd=1024 --rxd=1024 --max-pkt-len=9600
    testpmd>set fwd rxonly
    testpmd>start

5. Bootup pdump in VM1::

    ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=test -- --pdump  'port=0,queue=*,rx-dev=/root/pdump-rx.pcap,mbuf-size=8000'

6. On VM2, bind virtio with igb_uio driver,then run testpmd, config tx_packets to 8k length with chain mode::

    ./testpmd -c 0x3 -n 4 -- -i --txd=1024 --rxd=1024 --max-pkt-len=9600
    testpmd>set fwd mac
    testpmd>set txpkts 2000,2000,2000,2000

7. Send ten packets with 8k length from virtio-pmd on VM2::

    testpmd>set burst 1
    testpmd>start tx_first 10

8. Check payload is correct in each dumped packets.

9. Relaunch testpmd in VM1::

    ./testpmd -c 0x3 -n 4 --file-prefix=test -- -i --txd=1024 --rxd=1024
    testpmd>set fwd rxonly
    testpmd>start

10. Bootup pdump in VM1::

    ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=test -- --pdump  'port=0,queue=*,rx-dev=/root/pdump-rx-small.pcap,mbuf-size=8000'

11. Relaunch testpmd on VM2, send ten 64B packets from virtio-pmd on VM2::

     ./testpmd -c 0x3 -n 4 -- -i --txd=1024 --rxd=1024
     testpmd>set fwd mac
     testpmd>set burst 1
     testpmd>start tx_first 10

12. Check payload is correct in each dumped packets.

Test Case 6: VM2VM vhost-user/virtio1.0-pmd mergeable path with payload valid check
===================================================================================

1. Bind virtio with igb_uio driver, launch the testpmd by below commands::

    ./testpmd -c 0xc0000 -n 4 --socket-mem 2048,2048 --legacy-mem --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

2. Launch VM1 and VM2, mrg_rxbuf=on to enable mergeable path::

    qemu-system-x86_64 -name us-vhost-vm1 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16-1.img  \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6004-:22 \
     -chardev socket,id=char0,path=./vhost-net0 -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:01,netdev=mynet1,disable-modern=false,mrg_rxbuf=on,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on \
     -vnc :12 -daemonize

    qemu-system-x86_64 -name us-vhost-vm2 \
     -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc \
     -smp cores=2,sockets=1 -drive file=/home/osimg/ubuntu16.img \
     -monitor unix:/tmp/vm2_monitor.sock,server,nowait -net nic,vlan=2,macaddr=00:00:00:08:e8:aa,addr=1f -net user,vlan=2,hostfwd=tcp:127.0.0.1:6003-:22 \
     -chardev socket,id=char1,path=./vhost-net1 -netdev type=vhost-user,id=mynet2,chardev=char1,vhostforce \
     -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=mynet2,disable-modern=false,mrg_rxbuf=on,csum=on,gso=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on \
     -vnc :11 -daemonize

3. On VM1, enable pcap lib in dpdk code and recompile::

    diff --git a/config/common_base b/config/common_base
    index 6b96e0e80..0f7d22f22 100644
    --- a/config/common_base
    +++ b/config/common_base
    @@ -492,7 +492,7 @@ CONFIG_RTE_LIBRTE_PMD_NULL=y
     #
     # Compile software PMD backed by PCAP files
     #
    -CONFIG_RTE_LIBRTE_PMD_PCAP=n
    +CONFIG_RTE_LIBRTE_PMD_PCAP=y

4. Bind virtio with igb_uio driver,then run testpmd, set rxonly mode for virtio-pmd on VM1::

    ./testpmd -c 0x3 -n 4 --file-prefix=test -- -i --txd=1024 --rxd=1024 --max-pkt-len=9600
    testpmd>set fwd rxonly
    testpmd>start

5. Bootup pdump in VM1::

    ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=test -- --pdump  'port=0,queue=*,rx-dev=/root/pdump-rx.pcap,mbuf-size=8000'

6. On VM2, bind virtio with igb_uio driver,then run testpmd, config tx_packets to 8k length with chain mode::

    ./testpmd -c 0x3 -n 4 -- -i --txd=1024 --rxd=1024 --max-pkt-len=9600
    testpmd>set fwd mac
    testpmd>set txpkts 2000,2000,2000,2000

7. Send ten packets from virtio-pmd on VM2::

    testpmd>set burst 1
    testpmd>start tx_first 10

8. Check payload is correct in each dumped packets.

9. Relaunch testpmd in VM1::

    ./testpmd -c 0x3 -n 4 --file-prefix=test -- -i --txd=1024 --rxd=1024
    testpmd>set fwd rxonly
    testpmd>start

10. Bootup pdump in VM1::

    ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=test -- --pdump  'port=0,queue=*,rx-dev=/root/pdump-rx-small.pcap'

11. Relaunch testpmd On VM2, send ten 64B packets from virtio-pmd on VM2::

     ./testpmd -c 0x3 -n 4 -- -i --txd=1024 --rxd=1024 --max-pkt-len=9600
     testpmd>set fwd mac
     testpmd>set burst 1
     testpmd>start tx_first 10

12. Check payload is correct in each dumped packets.

Test Case 7: vm2vm vhost-user/virtio1.1-pmd mergeable path test with payload check
==================================================================================

1. Launch testpmd by below command::

    rm -rf vhost-net*
    ./testpmd -l 1-2 -n 4 --socket-mem 1024,1024 --no-pci \
    --vdev 'eth_vhost0,iface=vhost-net,queues=1' --vdev 'eth_vhost1,iface=vhost-net1,queues=1' -- \
    -i --nb-cores=1 --txd=1024 --rxd=1024
    testpmd>set fwd mac
    testpmd>start

2. Launch virtio-user1 by below command::

    ./testpmd -n 4 -l 7-8 --socket-mem 1024,1024 \
    --no-pci --file-prefix=virtio1 \
    --vdev=net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=1,packed_vq=1,mrg_rxbuf=1,in_order=0 \
    -- -i --nb-cores=1 --txd=1024 --rxd=1024 --max-pkt-len=9600
    testpmd>set fwd rxonly
    testpmd>start

3. Attach pdump secondary process to primary process by same file-prefix::

    ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -v --file-prefix=virtio1 -- --pdump 'device_id=net_virtio_user1,queue=*,rx-dev=/root/pdump-rx.pcap,mbuf-size=8000'

4. Launch virtio-user0 and send 8k length packets::

    ./testpmd -n 4 -l 5-6 --socket-mem 1024,1024 \
    --no-pci --file-prefix=virtio \
    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=1,packed_vq=1,mrg_rxbuf=1,in_order=0 \
    -- -i --nb-cores=1 --txd=1024 --rxd=1024 --max-pkt-len=9600
    testpmd>set txpkts 2000,2000,2000,2000
    testpmd>set burst 1
    testpmd>start tx_first 10

5. Check payload is correct in each dumped packets.