[dts][PATCH V2 2/3] test_plans/basic_4k_pages_cbdma_test_plan: add basic_4k_pages_cbdma testplan

[Wei Ling <weix.ling@intel.com>]

v1:
As commit 53d3f4778c(vhost: integrate dmadev in asynchronous data-path),
add new testsuite basic_4k_pages_cbdma for coverage the pvp
virtio-user 4k pages with cbdma.
1) Add new testplan basic_4k_pages_cbdma_test_plan into test_plans.

v2:
Modify the `Description` content in test_plan.

Signed-off-by: Wei Ling <weix.ling@intel.com>
---
 test_plans/basic_4k_pages_cbdma_test_plan.rst | 421 ++++++++++++++++++
 1 file changed, 421 insertions(+)
 create mode 100644 test_plans/basic_4k_pages_cbdma_test_plan.rst

diff --git a/test_plans/basic_4k_pages_cbdma_test_plan.rst b/test_plans/basic_4k_pages_cbdma_test_plan.rst
new file mode 100644
index 00000000..8ade0ee1
--- /dev/null
+++ b/test_plans/basic_4k_pages_cbdma_test_plan.rst
@@ -0,0 +1,421 @@
+.. Copyright (c) <2022>, 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
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+   COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+   OF THE POSSIBILITY OF SUCH DAMAGE.
+
+==============================================
+Basic test with CBDMA in 4K-pages test plan
+=============================================
+
+DPDK 19.02 add support for using virtio-user without hugepages. The --no-huge mode was augmented to use memfd-backed memory 
+(on systems that support memfd), to allow using virtio-user-based NICs without hugepages.
+
+Vhost asynchronous data path leverages DMA devices to offload memory copies from the CPU and it is implemented in an asynchronous way.
+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. Vhost enqueue operation with CBDMA channels is supported
+in both split and packed ring.
+
+This document provides the test plan for testing some basic functions with CBDMA device in 4K-pages memory environment.
+1. Test split and packed ring virtio path in the PVP topology environmet.
+2. Check Vhost tx offload function by verifing the TSO/cksum in the TCP/IP stack with vm2vm split ring and packed ring
+vhost-user/virtio-net mergeable path.
+3.Check the payload of large packet (larger than 1MB) is valid after forwarding packets with vm2vm split ring and packed ring 
+vhost-user/virtio-net mergeable path.
+4. Vhost-user using 1G hugepges and virtio-user using 4k-pages.
+
+Note:
+1. When CBDMA channels 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. And case 4-5 have not yet been automated.
+
+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
+=============
+
+Software
+--------
+Trex:http://trex-tgn.cisco.com/trex/release/v2.26.tar.gz
+
+General set up
+--------------
+1. Turn off transparent hugepage in grub by adding GRUB_CMDLINE_LINUX="transparent_hugepage=never".
+   
+2. 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
+    For example:
+    CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=x86_64-native-linuxapp-gcc
+    ninja -C x86_64-native-linuxapp-gcc -j 110
+
+3. 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
+
+4. Prepare tmpfs with 4K-pages::
+
+   mkdir /mnt/tmpfs_nohuge0
+   mkdir /mnt/tmpfs_nohuge1
+   mount tmpfs /mnt/tmpfs_nohuge0 -t tmpfs -o size=4G
+   mount tmpfs /mnt/tmpfs_nohuge1 -t tmpfs -o size=4G
+
+Test case
+=========
+
+Common steps
+------------
+1. Bind 1 NIC port and CBDMA channels 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>
+
+	For example, bind 1 NIC port and 1 CBDMA channels:
+	<dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci 0000:af:00.0,0000:80:04.0
+
+Test Case 1: Basic test vhost/virtio-user split ring with 4K-pages and cbdma enable
+-----------------------------------------------------------------------------------
+This case uses testpmd Traffic Generator(For example, Trex) to test split ring when vhost uses the asynchronous enqueue operations with CBDMA channels
+in 4k-pages environment. And the mapping between vrings and dsa virtual channels is 1:1.
+
+1. Bind 1 NIC port and 1 CBDMA channel to vfio-pci, as common steps 1.
+
+2. Launch vhost by below command::
+
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 31-32 -n 4 --no-huge -m 1024 --file-prefix=vhost -a 0000:af:00.0 -a 0000:80:04.0 \
+	--vdev 'net_vhost0,iface=/tmp/vhost-net,queues=1,dmas=[txq0]' -- -i --no-numa --socket-num=1 --lcore-dma=[lcore32@0000:80:04.0]
+	testpmd> start
+
+3. Launch virtio-user with 4K-pages::
+
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 33-34 -n 4 --no-huge -m 1024 --file-prefix=virtio-user --no-pci \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=/tmp/vhost-net,queues=1 -- -i
+	testpmd> set fwd mac
+	testpmd> start
+
+4. Send packet with packet generator with different packet size,includes [64, 128, 256, 512, 1024, 1518], check the throughput with below command::
+
+	testpmd> show port stats all
+
+Test Case 2: Basic test vhost/virtio-user packed ring with 4K-pages and cbdma enable
+------------------------------------------------------------------------------------
+This case uses testpmd Traffic Generator(For example, Trex) to test packed ring when vhost uses the asynchronous enqueue operations with CBDMA channels
+in 4k-pages environment. And the mapping between vrings and dsa virtual channels is 1:1.
+
+1. Bind 1 NIC port and 1 CBDMA channel to vfio-pci, as common steps 1.
+
+2. Launch vhost by below command::
+
+	./usertools/dpdk-devbind.py --bind=vfio-pci 0000:af:00.0 0000:80:04.0
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 31-32 -n 4 --no-huge -m 1024 --file-prefix=vhost -a 0000:af:00.0 -a 0000:80:04.0 \
+	--vdev 'net_vhost0,iface=/tmp/vhost-net,queues=1,dmas=[txq0]' -- -i --no-numa --socket-num=1 --lcore-dma=[lcore32@0000:80:04.0]
+	testpmd> start
+
+3. Launch virtio-user with 4K-pages::
+
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 33-34 -n 4 --no-huge -m 1024 --file-prefix=virtio-user --no-pci \
+	--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=/tmp/vhost-net,packed_vq=1,queues=1 -- -i
+	testpmd> set fwd mac
+	testpmd> start
+
+4. Send packet with packet generator with different packet size,includes [64, 128, 256, 512, 1024, 1518], check the throughput with below command::
+
+	testpmd> show port stats all
+
+Test Case 3: VM2VM split ring vhost-user/virtio-net 4K-pages and CBDMA enable test with tcp traffic
+---------------------------------------------------------------------------------------------------
+This case test the function of Vhost tx offload in the topology of vhost-user/virtio-net split ring mergeable path
+by verifing the TSO/cksum in the TCP/IP stack when vhost uses the asynchronous enqueue operations with CBDMA channels
+in 4k-pages environment.
+
+1. Bind 2 CBDMA channels to vfio-pci, as common steps 1.
+
+2. Launch vhost by below command::
+
+	./usertools/dpdk-devbind.py --bind=vfio-pci 0000:80:04.0 0000:80:04.1
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 30-32 -n 4 --no-huge -m 1024 --file-prefix=vhost -a 0000:80:04.0 -a 0000:80:04.1 \
+	--vdev 'net_vhost0,iface=vhost-net0,queues=1,dmas=[txq0],dma_ring_size=2048' \
+	--vdev 'net_vhost1,iface=vhost-net1,queues=1,dmas=[txq0],dma_ring_size=2048' \
+	--iova=va -- -i --nb-cores=2 --txd=1024 --rxd=1024 --lcore-dma=[lcore31@0000:80:04.0,lcore32@0000:80:04.1]
+	testpmd> start
+
+3. Launch VM1 and VM2::
+
+	taskset -c 20,21,22,23,24,25,26,27 /home/QEMU/qemu-6.2.0/bin/qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
+	-object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/tmpfs_nohuge0,share=on \
+	-numa node,memdev=mem -mem-prealloc -drive file=/home/image/ubuntu2004.img  \
+	-chardev socket,path=/tmp/vm1_qga0.sock,server,nowait,id=vm1_qga0 -device virtio-serial \
+	-device virtserialport,chardev=vm1_qga0,name=org.qemu.guest_agent.2 -daemonize \
+	-monitor unix:/tmp/vm1_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
+	-netdev user,id=nttsip1,hostfwd=tcp:10.239.251.220:6000-: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
+
+	taskset -c 48,49,50,51,52,53,54,55 /home/QEMU/qemu-6.2.0/bin/qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
+	-object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/tmpfs_nohuge1,share=on \
+	-numa node,memdev=mem -mem-prealloc -drive file=/home/image/ubuntu2004_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:10.239.251.220:6001-: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
+
+4. On VM1, set virtio device IP and run arp protocal::
+
+	ifconfig ens5 1.1.1.2
+	arp -s 1.1.1.8 52:54:00:00:00:02
+
+5. On VM2, set virtio device IP and run arp protocal::
+
+	ifconfig ens5 1.1.1.8
+	arp -s 1.1.1.2 52:54:00:00:00:01
+
+6. Check the iperf performance between two VMs by below commands::
+
+	Under VM1, run: `iperf -s -i 1`
+	Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
+
+7. Check 2VMs can receive and send big packets to each other::
+
+	testpmd>  show port xstats all
+	Port 0 should have tx packets above 1522
+	Port 1 should have rx packets above 1522
+
+Test Case 4: vm2vm vhost/virtio-net split ring multi queues with 4K-pages and cbdma enable
+-------------------------------------------------------------------------------------------
+This case uses iperf and scp to test the payload of large packet (larger than 1MB) is valid after packets forwarding in
+vm2vm vhost-user/virtio-net split ring mergeable path when vhost uses the asynchronous enqueue operations with CBDMA channel.
+The dynamic change of multi-queues number also test.
+
+1. Bind 16 CBDMA channels to vfio-pci, as common steps 1.
+
+2. Launch vhost by below command::
+
+	./usertools/dpdk-devbind.py --bind=vfio-pci 0000:80:04.0 0000:80:04.1 0000:80:04.2 0000:80:04.3 0000:80:04.4 0000:80:04.5 0000:80:04.6 0000:80:04.7 \
+	0000:00:04.0 0000:00:04.1 0000:00:04.2 0000:00:04.3 0000:00:04.4 0000:00:04.5 0000:00:04.6 0000:00:04.7
+
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 29-33 -n 4 --no-huge -m 1024 --file-prefix=vhost \
+	-a 0000:80:04.0 -a 0000:80:04.1 -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 \
+	-a 0000:80:04.0 -a 0000:80:04.1 -a 0000:80:04.2 -a 0000:80:04.3 -a 0000:80:04.4 -a 0000:80:04.5 -a 0000:80:04.6 -a 0000:80:04.7 \
+	--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;txq7]' \
+	--vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;txq7]' \
+	--iova=va -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=8 --txq=8 \
+	--lcore-dma=[lcore30@0000:80:04.0,lcore30@0000:80:04.1,lcore30@0000:00:04.2,lcore30@0000:00:04.3,lcore30@0000:00:04.4,lcore30@0000:00:04.5,lcore31@0000:00:04.6,lcore31@0000:00:04.7,lcore32@0000:80:04.0,lcore32@0000:80:04.1,lcore32@0000:80:04.2,lcore32@0000:80:04.3,lcore32@0000:80:04.4,lcore32@0000:80:04.5,lcore32@0000:80:04.6,lcore33@0000:80:04.7]
+
+	testpmd> start
+
+
+3. Launch VM qemu::
+
+	taskset -c 20,21,22,23,24,25,26,27 /home/QEMU/qemu-6.2.0/bin/qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 8 -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/image/ubuntu2004.img  \
+	-chardev socket,path=/tmp/vm1_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
+	-device virtserialport,chardev=vm1_qga0,name=org.qemu.guest_agent.2 -daemonize \
+	-monitor unix:/tmp/vm1_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
+	-netdev user,id=nttsip1,hostfwd=tcp:10.239.251.220:6000-: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 48,49,50,51,52,53,54,55 /home/QEMU/qemu-6.2.0/bin/qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 8 -m 4096 \
+	-object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/tmpfs_yinan1,share=on \
+	-numa node,memdev=mem -mem-prealloc -drive file=/home/image/ubuntu2004_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:10.239.251.220:6001-: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
+
+4. On VM1, set virtio device IP and run arp protocal::
+
+	ethtool -L ens5 combined 8
+	ifconfig ens5 1.1.1.2
+	arp -s 1.1.1.8 52:54:00:00:00:02
+
+5. On VM2, set virtio device IP and run arp protocal::
+
+	ethtool -L ens5 combined 8
+	ifconfig ens5 1.1.1.8
+	arp -s 1.1.1.2 52:54:00:00:00:01
+
+6. Scp 1MB file form VM1 to VM2::
+
+	Under VM1, run: `scp [xxx] root@1.1.1.8:/`   [xxx] is the file name
+
+7. Check the iperf performance between two VMs by below commands::
+
+	Under VM1, run: `iperf -s -i 1`
+	Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
+
+8. Quit and relaunch vhost w/ diff CBDMA channels::
+
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 29-33 -n 4 --no-huge -m 1024 --file-prefix=vhost \
+	-a 0000:80:04.0 -a 0000:80:04.1 -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 \
+	-a 0000:80:04.0 -a 0000:80:04.1 -a 0000:80:04.2 -a 0000:80:04.3 -a 0000:80:04.4 -a 0000:80:04.5 -a 0000:80:04.6 -a 0000:80:04.7 \
+	--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6]' \
+	--vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq1;txq2;txq3;txq4;txq5;txq6;txq7]' \
+	--iova=va -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=8 --txq=8 \
+	--lcore-dma=[lcore30@0000:80:04.0,lcore30@0000:80:04.1,lcore30@0000:00:04.2,lcore30@0000:00:04.3,lcore31@0000:80:04.0,lcore31@0000:00:04.2,lcore31@0000:00:04.4,lcore31@0000:00:04.5,lcore31@0000:00:04.6,lcore31@0000:00:04.7,lcore32@0000:80:04.1,lcore32@0000:00:04.3,lcore32@0000:80:04.0,lcore32@0000:80:04.1,lcore32@0000:80:04.2,lcore32@0000:80:04.3,lcore32@0000:80:04.4,lcore32@0000:80:04.5,lcore32@0000:80:04.6,lcore33@0000:80:04.7]
+	testpmd> start
+
+9. Rerun step 6-7.
+
+10. Quit and relaunch vhost w/o CBDMA channels::
+
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 29-33 -n 4 --no-huge -m 1024 --file-prefix=vhost \
+	--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=4' --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=4' \
+	-- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=4 --txq=4
+	testpmd> start
+
+11. On VM1, set virtio device::
+
+	ethtool -L ens5 combined 4
+
+12. On VM2, set virtio device::
+
+	ethtool -L ens5 combined 4
+
+13. Scp 1MB file form VM1 to VM2::
+
+	Under VM1, run: `scp [xxx] root@1.1.1.8:/`   [xxx] is the file name
+
+14. Check the iperf performance and compare with CBDMA enable performance, ensure CMDMA enable performance is higher::
+
+	Under VM1, run: `iperf -s -i 1`
+	Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
+
+15. Quit and relaunch vhost with 1 queues::
+
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 29-33 -n 4 --no-huge -m 1024 --file-prefix=vhost \
+	--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=4' --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=4' \
+	-- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=1 --txq=1
+	testpmd> start
+
+16. On VM1, set virtio device::
+
+	ethtool -L ens5 combined 1
+
+17. On VM2, set virtio device::
+
+	ethtool -L ens5 combined 1
+
+18. Scp 1MB file form VM1 to VM2M, check packets can be forwarding success by scp::
+
+	Under VM1, run: `scp [xxx] root@1.1.1.8:/`   [xxx] is the file name
+
+19. Check the iperf performance, ensure queue0 can work from vhost side::
+
+	Under VM1, run: `iperf -s -i 1`
+	Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
+
+Test Case 5: vm2vm vhost/virtio-net split packed ring multi queues with 1G/4k-pages and cbdma enable
+----------------------------------------------------------------------------------------------------
+This case uses iperf and scp to test the payload of large packet (larger than 1MB) is valid after packets forwarding in 
+vm2vm vhost-user/virtio-net multi-queues mergeable path when vhost uses the asynchronous enqueue operations with CBDMA
+channels. And one virtio-net is split ring, the other is packed ring. The vhost run in 1G hugepages and the virtio-user run in 4k-pages environment.
+
+1. Bind 16 CBDMA channel to vfio-pci, as common steps 1.
+
+2. Launch vhost by below command::
+
+	./usertools/dpdk-devbind.py --bind=vfio-pci 0000:80:04.0 0000:80:04.1 0000:80:04.2 0000:80:04.3 0000:80:04.4 0000:80:04.5 0000:80:04.6 0000:80:04.7 \
+	0000:00:04.0 0000:00:04.1 0000:00:04.2 0000:00:04.3 0000:00:04.4 0000:00:04.5 0000:00:04.6 0000:00:04.7
+
+	<dpdk dir># ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 29-33 -n 4 -m 1024 --file-prefix=vhost \
+	-a 0000:80:04.0 -a 0000:80:04.1 -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 \
+	-a 0000:80:04.0 -a 0000:80:04.1 -a 0000:80:04.2 -a 0000:80:04.3 -a 0000:80:04.4 -a 0000:80:04.5 -a 0000:80:04.6 -a 0000:80:04.7 \
+	--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas=[txq0;txq1;txq2;txq3;]' \
+	--vdev 'net_vhost1,iface=vhost-net1,queues=8,dmas=[txq0;txq1;txq2;txq3;]' \
+	--iova=va -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=8 --txq=8 \
+	--lcore-dma=[lcore30@0000:80:04.0,lcore30@0000:80:04.1,lcore30@0000:00:04.2,lcore30@0000:00:04.3,lcore31@0000:00:04.4,lcore31@0000:00:04.5,lcore31@0000:00:04.6,lcore31@0000:00:04.7,lcore32@0000:80:04.0,lcore32@0000:80:04.1,lcore32@0000:80:04.2,lcore32@0000:80:04.3,lcore33@0000:80:04.4,lcore33@0000:80:04.5,lcore33@0000:80:04.6,lcore33@0000:80:04.7]
+	testpmd> start
+
+3. Launch VM qemu::
+
+	taskset -c 20,21,22,23,24,25,26,27 /home/QEMU/qemu-6.2.0/bin/qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 8 -m 4096 \
+	-object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/tmpfs_nohuge0,share=on \
+	-numa node,memdev=mem -mem-prealloc -drive file=/home/image/ubuntu2004.img  \
+	-chardev socket,path=/tmp/vm1_qga0.sock,server,nowait,id=vm1_qga0 -device virtio-serial \
+	-device virtserialport,chardev=vm1_qga0,name=org.qemu.guest_agent.2 -daemonize \
+	-monitor unix:/tmp/vm1_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
+	-netdev user,id=nttsip1,hostfwd=tcp:10.239.251.220:6000-: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
+
+	taskset -c 48,49,50,51,52,53,54,55 /home/QEMU/qemu-6.2.0/bin/qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 8 -m 4096 \
+	-object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/tmpfs_nohuge1,share=on \
+	-numa node,memdev=mem -mem-prealloc -drive file=/home/image/ubuntu2004_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:10.239.251.220:6001-: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,packed=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
+
+4. On VM1, set virtio device IP and run arp protocal::
+
+	ethtool -L ens5 combined 8
+	ifconfig ens5 1.1.1.2
+	arp -s 1.1.1.8 52:54:00:00:00:02
+
+5. On VM2, set virtio device IP and run arp protocal::
+
+	ethtool -L ens5 combined 8
+	ifconfig ens5 1.1.1.8
+	arp -s 1.1.1.2 52:54:00:00:00:01
+
+6. Scp 1MB file form VM1 to VM2::
+
+	Under VM1, run: `scp [xxx] root@1.1.1.8:/`   [xxx] is the file name
+
+7. Check the iperf performance between two VMs by below commands::
+
+	Under VM1, run: `iperf -s -i 1`
+	Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
-- 
2.34.1