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+. Copyright (c) <2020>, Intel Corporation
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+
+   - Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+
+   - Neither the name of Intel Corporation nor the names of its
+     contributors may be used to endorse or promote products derived
+     from this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+   COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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+   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+   OF THE POSSIBILITY OF SUCH DAMAGE.
+
+=================================
+vhost/virtio-user smoke test plan
+=================================
+
+This test plan cover vhost/virtio pvp and loopback topolopy test, split ring and packed ring test,
+server mode and client mode test, also multi-queues and dynamic queue size test.
+
+Test Case 1: loopback reconnect test with split ring mergeable path and server mode
+===================================================================================
+
+1. Launch vhost as client mode with 2 queues::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xe -n 4 --no-pci --file-prefix=vhost \
+    --vdev 'eth_vhost0,iface=vhost-net,client=1,queues=8' -- -i --nb-cores=2 --rxq=2 --txq=2
+    >set fwd mac
+    >start
+
+2. Launch virtio-user as server mode with 8 queues::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-7 --no-pci --file-prefix=virtio \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,server=1,queues=8,mrg_rxbuf=1,in_order=1 \
+    -- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=2 --rxq=8 --txq=8
+    >set fwd mac
+    >start tx_first 32
+
+3. Stop vhost port and check queue0 and queue1 RX/TX direction both have packets::
+
+    testpmd>stop
+
+4. Relaunch vhost with 8 queues and send packets::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xe -n 4 --no-pci --file-prefix=vhost \
+    --vdev 'eth_vhost0,iface=vhost-net,client=1,queues=8' -- -i --nb-cores=2 --rxq=8 --txq=8
+    >set fwd mac
+    >start tx_first 32
+    stop
+    set burst 1
+    start tx_first 1
+
+5. Stop vhost port and check queue0 to queue7 RX/TX direction both have packets::
+
+    testpmd>stop
+
+Test Case 2: pvp test with virtio packed ring vectorized path
+============================================================
+
+1. Bind one port to vfio-pci, then launch vhost by below command::
+
+    rm -rf vhost-net*
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 2-4 --file-prefix=vhost --vdev 'net_vhost0,iface=vhost-net,queues=1' \
+    -- -i --nb-cores=2 --txd=1024 --rxd=1024
+    testpmd>set fwd mac
+    testpmd>start
+
+2. Launch virtio-user by below command::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -n 4 -l 5-6 --no-pci --file-prefix=virtio --force-max-simd-bitwidth=512 \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,packed_vq=1,mrg_rxbuf=0,in_order=1,vectorized=1,queue_size=1024 \
+    -- -i --nb-cores=1 --txd=1024 --rxd=1024
+    testpmd>set fwd mac
+    testpmd>start
+
+3. Send 64B and 1518B packets with packet generator, check the throughput with below command::
+
+    testpmd>show port stats all
+
+
+
