189. vhost event idx interrupt mode test plan

189.1. Description

Vhost event idx interrupt need test with l3fwd-power sample, send small packets from virtio-net to vhost side,check vhost-user cores can be wakeup status,and vhost-user cores should be sleep status after stop sending packets from virtio side.For packed virtqueue test, need using qemu version > 4.2.0.

189.2. Prerequisites

Modify l3fwd-power example code and recompile:

--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -248,7 +248,6 @@ static struct rte_eth_conf port_conf = {
        .mq_mode        = ETH_MQ_RX_RSS,
        .max_rx_pkt_len = RTE_ETHER_MAX_LEN,
        .split_hdr_size = 0,
-       .offloads = DEV_RX_OFFLOAD_CHECKSUM,
},
.rx_adv_conf = {
        .rss_conf = {

189.3. Test flow

Virtio-net –> Vhost-user

189.4. Test Case 1: wake up split ring vhost-user core with event idx interrupt mode

  1. Launch l3fwd-power example app with client mode:

    ./l3fwd-power -l 1 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1' \
    -- -p 0x1 \
    --parse-ptype 1 \
    --config "(0,0,1)"
    
  2. Launch VM1 with server mode:

     taskset -c 17-18 qemu-system-x86_64 -name us-vhost-vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu1910.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-net0 \
    -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
    
  3. Relauch l3fwd-power sample for port up:

    ./l3fwd-power -l 1 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1' \
    -- -p 0x1 \
    --parse-ptype 1 \
    --config "(0,0,1)"
    
  4. On VM, set ip for virtio device and send packets to vhost by cmds:

    ifconfig [ens3] 1.1.1.2
    #[ens3] is the virtual device name
    ping 1.1.1.3
    #send packets to vhost
    
  5. Check vhost related core is waked up by reading l3fwd-power log.

189.5. Test Case 2: wake up split ring vhost-user cores with event idx interrupt mode 16 queues test

  1. Launch l3fwd-power example app with client mode:

    ./l3fwd-power -l 1-16 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=16,client=1' \
    -- -p 0x1 \
    --parse-ptype 1 \
    --config "(0,0,1),(0,1,2),(0,2,3),(0,3,4),(0,4,5),(0,5,6),(0,6,7),(0,7,8),(0,8,9),(0,9,10),(0,10,11),(0,11,12),(0,12,13),(0,13,14),(0,14,15),(0,15,16)"
    
  2. Launch VM1 with server mode:

     taskset -c 17-18 qemu-system-x86_64 -name us-vhost-vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu1910.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-net0 \
    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce,queues=16 \
    -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,mq=on,vectors=40 -vnc :12
    
  3. Relauch l3fwd-power sample for port up:

    ./l3fwd-power -l 1-16 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=16,client=1' \
    -- -p 0x1 \
    --parse-ptype 1 \
    --config "(0,0,1),(0,1,2),(0,2,3),(0,3,4),(0,4,5),(0,5,6),(0,6,7),(0,7,8),(0,8,9),(0,9,10),(0,10,11),(0,11,12),(0,12,13),(0,13,14),(0,14,15),(0,15,16)"
    
  4. Set vitio-net with 16 quques and give vitio-net ip address:

    ethtool -L [ens3] combined 16    # [ens3] is the name of virtio-net
    ifconfig [ens3] 1.1.1.1
    
  5. Send packets with different IPs from virtio-net, notice to bind each vcpu to different send packets process:

    taskset -c 0 ping 1.1.1.2
    taskset -c 1 ping 1.1.1.3
    taskset -c 2 ping 1.1.1.4
    taskset -c 3 ping 1.1.1.5
    taskset -c 4 ping 1.1.1.6
    taskset -c 5 ping 1.1.1.7
    taskset -c 6 ping 1.1.1.8
    taskset -c 7 ping 1.1.1.9
    taskset -c 8 ping 1.1.1.2
    taskset -c 9 ping 1.1.1.2
    taskset -c 10 ping 1.1.1.2
    taskset -c 11 ping 1.1.1.2
    taskset -c 12 ping 1.1.1.2
    taskset -c 13 ping 1.1.1.2
    taskset -c 14 ping 1.1.1.2
    taskset -c 15 ping 1.1.1.2
    
  6. Check vhost related cores are waked up with l3fwd-power log, such as following:

    L3FWD_POWER: lcore 0 is waked up from rx interrupt on port 0 queue 0
    ...
    ...
    L3FWD_POWER: lcore 15 is waked up from rx interrupt on port 0 queue 15
    

189.6. Test Case 3: wake up split ring vhost-user cores by multi virtio-net in VMs with event idx interrupt mode

  1. Launch l3fwd-power example app with client mode:

    ./l3fwd-power -l 1-2 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1' \
    --vdev 'eth_vhost1,iface=/vhost-net1,queues=1,client=1' \
    -- -p 0x3 \
    --parse-ptype 1 \
    --config "(0,0,1),(1,0,2)"
    
  2. Launch VM1 and VM2 with server mode:

    taskset -c 33 \
    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=1,sockets=1 -drive file=/home/osimg/ubuntu1910.img  \
    -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,server,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,csum=on -vnc :10 -daemonize
    
    taskset -c 34 \
    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=1,sockets=1 -drive file=/home/osimg/ubuntu1910-2.img  \
    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6004-:22 \
    -chardev socket,server,id=char0,path=/vhost-net1 \
    -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
    -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=mynet1,csum=on -vnc :11 -daemonize
    
  3. Relauch l3fwd-power sample for port up:

    ./l3fwd-power -l 1-2 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1' \
    --vdev 'eth_vhost1,iface=/vhost-net1,queues=1,client=1' \
    -- -p 0x3 \
    --parse-ptype 1 \
    --config "(0,0,1),(1,0,2)"
    
  4. On VM1, set ip for virtio device and send packets to vhost:

    ifconfig [ens3] 1.1.1.2
    #[ens3] is the virtual device name
    ping 1.1.1.3
    #send packets to vhost
    
  5. On VM2, also set ip for virtio device and send packets to vhost:

    ifconfig [ens3] 1.1.1.4
    #[ens3] is the virtual device name
    ping 1.1.1.5
    #send packets to vhost
    
  6. Check vhost related cores are waked up with l3fwd-power log.

189.7. Test Case 4: wake up packed ring vhost-user core with event idx interrupt mode

  1. Launch l3fwd-power example app with client mode:

    ./l3fwd-power -l 1 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1' \
    -- -p 0x1 \
    --parse-ptype 1 \
    --config "(0,0,1)"
    
  2. Launch VM1 with server mode:

    taskset -c 33 \
    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=1,sockets=1 -drive file=/home/osimg/ubuntu1910.img  \
    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6004-:22 \
    -chardev socket,server,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,csum=on,packed=on -vnc :10 -daemonize
    
  3. Relauch l3fwd-power sample for port up:

    ./l3fwd-power -l 1 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1' \
    -- -p 0x1 \
    --parse-ptype 1 \
    --config "(0,0,1)"
    
  4. On VM, set ip for virtio device and send packets to vhost by cmds:

    ifconfig [ens3] 1.1.1.2
    #[ens3] is the virtual device name
    ping 1.1.1.3
    #send packets to vhost
    
  5. Check vhost related core is waked up by reading l3fwd-power log.

189.8. Test Case 5: wake up packed ring vhost-user cores with event idx interrupt mode 16 queues test

  1. Launch l3fwd-power example app with client mode:

    ./l3fwd-power -l 1-16 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=16,client=1' \
    -- -p 0x1 \
    --parse-ptype 1 \
    --config "(0,0,1),(0,1,2),(0,2,3),(0,3,4),(0,4,5),(0,5,6),(0,6,7),(0,7,8),(0,8,9),(0,9,10),(0,10,11),(0,11,12),(0,12,13),(0,13,14),(0,14,15),(0,15,16)"
    
  2. Launch VM1 with server mode:

    taskset -c 17-18 \
    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=16,sockets=1 -drive file=/home/osimg/ubuntu1910.img  \
    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6004-:22 \
    -chardev socket,server,id=char0,path=/vhost-net0 \
    -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce,queues=16 \
    -device virtio-net-pci,mac=52:54:00:00:00:01,netdev=mynet1,csum=on,mq=on,packed=on,vectors=40 -vnc :10 -daemonize
    
  3. Relauch l3fwd-power sample for port up:

    ./l3fwd-power -l 1-16 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=16,client=1' \
    -- -p 0x1 \
    --parse-ptype 1 \
    --config "(0,0,1),(0,1,2),(0,2,3),(0,3,4),(0,4,5),(0,5,6),(0,6,7),(0,7,8),(0,8,9),(0,9,10),(0,10,11),(0,11,12),(0,12,13),(0,13,14),(0,14,15),(0,15,16)"
    
  4. Set vitio-net with 16 quques and give vitio-net ip address:

    ethtool -L [ens3] combined 16    # [ens3] is the name of virtio-net
    ifconfig [ens3] 1.1.1.1
    
  5. Send packets with different IPs from virtio-net, notice to bind each vcpu to different send packets process:

    taskset -c 0 ping 1.1.1.2
    taskset -c 1 ping 1.1.1.3
    taskset -c 2 ping 1.1.1.4
    taskset -c 3 ping 1.1.1.5
    taskset -c 4 ping 1.1.1.6
    taskset -c 5 ping 1.1.1.7
    taskset -c 6 ping 1.1.1.8
    taskset -c 7 ping 1.1.1.9
    taskset -c 8 ping 1.1.1.2
    taskset -c 9 ping 1.1.1.2
    taskset -c 10 ping 1.1.1.2
    taskset -c 11 ping 1.1.1.2
    taskset -c 12 ping 1.1.1.2
    taskset -c 13 ping 1.1.1.2
    taskset -c 14 ping 1.1.1.2
    taskset -c 15 ping 1.1.1.2
    
  6. Check vhost related cores are waked up with l3fwd-power log, such as following:

    L3FWD_POWER: lcore 0 is waked up from rx interrupt on port 0 queue 0
    ...
    ...
    L3FWD_POWER: lcore 15 is waked up from rx interrupt on port 0 queue 15
    

189.9. Test Case 6: wake up packed ring vhost-user cores by multi virtio-net in VMs with event idx interrupt mode

  1. Launch l3fwd-power example app with client mode:

    ./l3fwd-power -l 1-2 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1' \
    --vdev 'eth_vhost1,iface=/vhost-net1,queues=1,client=1' \
    -- -p 0x3 \
    --parse-ptype 1 \
    --config "(0,0,1),(1,0,2)"
    
  2. Launch VM1 and VM2 with server mode:

    taskset -c 33 \
    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=1,sockets=1 -drive file=/home/osimg/ubuntu1910.img  \
    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6004-:22 \
    -chardev socket,server,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,csum=on,packed=on -vnc :10 -daemonize
    
    taskset -c 34 \
    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=1,sockets=1 -drive file=/home/osimg/ubuntu1910-2.img  \
    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6004-:22 \
    -chardev socket,server,id=char0,path=/vhost-net1 \
    -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
    -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=mynet1,csum=on,packed=on -vnc :11 -daemonize
    
  3. Relauch l3fwd-power sample for port up:

    ./l3fwd-power -l 1-2 \
    -n 4 --no-pci\
    --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1' \
    --vdev 'eth_vhost1,iface=/vhost-net1,queues=1,client=1' \
    -- -p 0x3 \
    --parse-ptype 1 \
    --config "(0,0,1),(1,0,2)"
    
  4. On VM1, set ip for virtio device and send packets to vhost:

    ifconfig [ens3] 1.1.1.2
    #[ens3] is the virtual device name
    ping 1.1.1.3
    #send packets to vhost
    
  5. On VM2, also set ip for virtio device and send packets to vhost:

    ifconfig [ens3] 1.1.1.4
    #[ens3] is the virtual device name
    ping 1.1.1.5
    #send packets to vhost
    
  6. Check vhost related cores are waked up with l3fwd-power log.

189.10. Test Case 7: wake up split ring vhost-user cores with event idx interrupt mode and cbdma enabled 16 queues test

  1. Bind 16 cbdma ports to igb_uio driver, then launch l3fwd-power example app with client mode:

    ./l3fwd-power -l 1-16 -n 4 --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=16,client=1,dmas=[txq0@80:04.0;txq1@80:04.1;txq2@80:04.2;txq3@80:04.3;txq4@80:04.4;txq5@80:04.5;txq6@80:04.6;txq7@80:04.7;txq8@00:04.0;txq9@00:04.1;txq10@00:04.2;txq11@00:04.3;txq12@00:04.4;txq13@00:04.5;txq14@00:04.6;txq15@00:04.7],dmathr=1024' \
    -- -p 0x1 --parse-ptype 1 \
    --config "(0,0,1),(0,1,2),(0,2,3),(0,3,4),(0,4,5),(0,5,6),(0,6,7),(0,7,8),(0,8,9),(0,9,10),(0,10,11),(0,11,12),(0,12,13),(0,13,14),(0,14,15),(0,15,16)"
    
  2. Launch VM1 with server mode:

     taskset -c 17-18 qemu-system-x86_64 -name us-vhost-vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu1910.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-net0 \
    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce,queues=16 \
    -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,mq=on,vectors=40 -vnc :12
    
  3. Relauch l3fwd-power sample for port up:

    ./l3fwd-power -l 1-16 -n 4 --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=16,client=1,dmas=[txq0@80:04.0;txq1@80:04.1;txq2@80:04.2;txq3@80:04.3;txq4@80:04.4;txq5@80:04.5;txq6@80:04.6;txq7@80:04.7;txq8@00:04.0;txq9@00:04.1;txq10@00:04.2;txq11@00:04.3;txq12@00:04.4;txq13@00:04.5;txq14@00:04.6;txq15@00:04.7],dmathr=1024' \
    -- -p 0x1 --parse-ptype 1 \
    --config "(0,0,1),(0,1,2),(0,2,3),(0,3,4),(0,4,5),(0,5,6),(0,6,7),(0,7,8),(0,8,9),(0,9,10),(0,10,11),(0,11,12),(0,12,13),(0,13,14),(0,14,15),(0,15,16)"
    
  4. Set vitio-net with 16 quques and give vitio-net ip address:

    ethtool -L [ens3] combined 16    # [ens3] is the name of virtio-net
    ifconfig [ens3] 1.1.1.1
    
  5. Send packets with different IPs from virtio-net, notice to bind each vcpu to different send packets process:

    taskset -c 0 ping 1.1.1.2
    taskset -c 1 ping 1.1.1.3
    taskset -c 2 ping 1.1.1.4
    taskset -c 3 ping 1.1.1.5
    taskset -c 4 ping 1.1.1.6
    taskset -c 5 ping 1.1.1.7
    taskset -c 6 ping 1.1.1.8
    taskset -c 7 ping 1.1.1.9
    taskset -c 8 ping 1.1.1.2
    taskset -c 9 ping 1.1.1.2
    taskset -c 10 ping 1.1.1.2
    taskset -c 11 ping 1.1.1.2
    taskset -c 12 ping 1.1.1.2
    taskset -c 13 ping 1.1.1.2
    taskset -c 14 ping 1.1.1.2
    taskset -c 15 ping 1.1.1.2
    
  6. Check vhost related cores are waked up with l3fwd-power log, such as following:

    L3FWD_POWER: lcore 0 is waked up from rx interrupt on port 0 queue 0
    ...
    ...
    L3FWD_POWER: lcore 15 is waked up from rx interrupt on port 0 queue 15
    

189.11. Test Case 8: wake up split ring vhost-user cores by multi virtio-net in VMs with event idx interrupt mode and cbdma enabled test

  1. Bind two cbdma ports to igb_uio driver, then launch l3fwd-power example app with client mode:

    ./l3fwd-power -l 1-2 -n 4 --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1,dmas=[txq0@00:04.0]' \
    --vdev 'eth_vhost1,iface=/vhost-net1,queues=1,client=1,dmas=[txq0@80:04.0]' \
    -- -p 0x3 --parse-ptype 1 --config "(0,0,1),(1,0,2)"
    
  2. Launch VM1 and VM2 with server mode:

    taskset -c 33 \
    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=1,sockets=1 -drive file=/home/osimg/ubuntu1910.img  \
    -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,server,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,csum=on -vnc :10 -daemonize
    
    taskset -c 34 \
    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=1,sockets=1 -drive file=/home/osimg/ubuntu1910-2.img  \
    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6004-:22 \
    -chardev socket,server,id=char0,path=/vhost-net1 \
    -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
    -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=mynet1,csum=on -vnc :11 -daemonize
    
  3. Relauch l3fwd-power sample for port up:

    ./l3fwd-power -l 1-2 -n 4 --log-level=9 \
    --vdev 'eth_vhost0,iface=/vhost-net0,queues=1,client=1,dmas=[txq0@00:04.0]' \
    --vdev 'eth_vhost1,iface=/vhost-net1,queues=1,client=1,dmas=[txq0@80:04.0]' \
    -- -p 0x3 --parse-ptype 1 --config "(0,0,1),(1,0,2)"
    
  4. On VM1, set ip for virtio device and send packets to vhost:

    ifconfig [ens3] 1.1.1.2
    #[ens3] is the virtual device name
    ping 1.1.1.3
    #send packets to vhost
    
  5. On VM2, also set ip for virtio device and send packets to vhost:

    ifconfig [ens3] 1.1.1.4
    #[ens3] is the virtual device name
    ping 1.1.1.5
    #send packets to vhost
    
  6. Check vhost related cores are waked up with l3fwd-power log.