diff mbox series

[V1,1/3] test_plans/basic_4k_pages_cbdma_test_plan: modify testplan to test virtio dequeue

Message ID 20220812094423.1040247-1-weix.ling@intel.com (mailing list archive)
State Superseded
Headers
Series modify basic_4k_pages_cbdma to test virtio dequeue |

Commit Message

Ling, WeiX Aug. 12, 2022, 9:44 a.m. UTC 
  From DPDK-22.07, virtio support async dequeue for split and packed ring
path, so modify basic_4k_pages_cbdma testplan to test the split
and packed ring async dequeue feature.

Signed-off-by: Wei Ling <weix.ling@intel.com>
---
 test_plans/basic_4k_pages_cbdma_test_plan.rst | 662 ++++++++++++------
 1 file changed, 445 insertions(+), 217 deletions(-)
diff mbox series

Patch

diff --git a/test_plans/basic_4k_pages_cbdma_test_plan.rst b/test_plans/basic_4k_pages_cbdma_test_plan.rst
index 5bbd19b4..9743397a 100644
--- a/test_plans/basic_4k_pages_cbdma_test_plan.rst
+++ b/test_plans/basic_4k_pages_cbdma_test_plan.rst
@@ -5,27 +5,26 @@ 
 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 
+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.
+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. From DPDK22.07, Vhost enqueue and dequeue 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 
+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:
+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.
+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
@@ -45,10 +44,10 @@  General set up
    
 2. Compile DPDK::
 
-	# CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=<dpdk build dir>
+	# CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=static <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
+    CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib -Dexamples=all --default-library=static 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::
@@ -84,310 +83,539 @@  Common steps
 	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.
+Test Case 1: Basic test vhost-user/virtio-user split ring vhost async operation using 4K-pages and cbdma enable
+---------------------------------------------------------------------------------------------------------------
+This case tests basic functions of split ring virtio path when uses the asynchronous operations with CBDMA channels in 4K-pages memory environment and PVP vhost-user/virtio-user topology.
 
-1. Bind 1 NIC port and 1 CBDMA channel to vfio-pci, as common steps 1.
+1. Bind one port to vfio-pci, launch vhost::
 
-2. Launch vhost by below command::
+    ./usertools/dpdk-devbind.py --bind=vfio-pci xx:xx.x
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 3-4 -n 4 -m 1024 --no-huge --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 \
+    --vdev 'net_vhost0,iface=/tmp/vhost-net,queues=1,dmas=[txq0;rxq0]' -- -i --no-numa --socket-num=0 --lcore-dma=[lcore4@0000:00:04.0]
+    testpmd>start
 
-	<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
+2. Prepare tmpfs with 4K-pages::
+
+    mkdir /mnt/tmpfs_yinan
+    mount tmpfs /mnt/tmpfs_yinan -t tmpfs -o size=4G
 
 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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 5-6 -n 4 --no-huge -m 1024 --file-prefix=virtio-user \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=/tmp/vhost-net,queues=1 -- -i
+    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
+    testpmd>show port stats all
+
+Test Case 2: Basic test vhost-user/virtio-user packed ring vhost async operation using 4K-pages and cbdma enable
+----------------------------------------------------------------------------------------------------------------
+This case tests basic functions of packed ring virtio path when uses the asynchronous operations with CBDMA channels in 4K-pages memory environment and PVP vhost-user/virtio-user topology.
 
-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 one port to vfio-pci, launch vhost::
 
-1. Bind 1 NIC port and 1 CBDMA channel to vfio-pci, as common steps 1.
+    modprobe vfio-pci
+    ./usertools/dpdk-devbind.py --bind=vfio-pci xx:xx.x
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 3-4 -n 4 -m 1024 --no-huge --file-prefix=vhost -a 0000:18:00.0 -a 0000:00:04.0 \
+    --vdev 'net_vhost0,iface=/tmp/vhost-net,queues=1,dmas=[txq0;rxq0]' -- -i --no-numa --socket-num=0 --lcore-dma=[lcore4@0000:00:04.0]
+    testpmd>start
 
-2. Launch vhost by below command::
+2. Prepare tmpfs with 4K-pages::
 
-	./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
+    mkdir /mnt/tmpfs_yinan
+    mount tmpfs /mnt/tmpfs_yinan -t tmpfs -o size=4G
 
 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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 5-6 -n 4 --no-huge -m 1024 --file-prefix=virtio-user \
+    --vdev=net_virtio_user0,mac=00:01:02:03:04:05,path=/tmp/vhost-net,packed_vq=1,queues=1 -- -i
+    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
+    testpmd>show port stats all
+
+Test Case 3: VM2VM vhost-user/virtio-net split ring vhost async operation test with tcp traffic using 4K-pages and cbdma enable
+-------------------------------------------------------------------------------------------------------------------------------
+This case test the function of Vhost TSO 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 operations with CBDMA channels in 4K-pages memory environment.
 
-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, then launch vhost by below command::
 
-1. Bind 2 CBDMA channels to vfio-pci, as common steps 1.
+    rm -rf vhost-net*
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 2-4 -n 4 --no-huge -m 1024 --file-prefix=vhost -a 0000:00:04.0 -a 0000:00:04.1 \
+    --vdev 'net_vhost0,iface=vhost-net0,queues=1,tso=1,dmas=[txq0;rxq0],dma_ring_size=2048' \
+    --vdev 'net_vhost1,iface=vhost-net1,queues=1,tso=1,dmas=[txq0;rxq0],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=2 --txd=1024 --rxd=1024 --lcore-dma=[lcore3@0000:00:04.0,lcore4@0000:00:04.1]
+    testpmd>start
 
-2. Launch vhost by below command::
+2. Prepare tmpfs with 4K-pages::
 
-	./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
+    mkdir /mnt/tmpfs_yinan0
+    mkdir /mnt/tmpfs_yinan1
+    mount tmpfs /mnt/tmpfs_yinan0 -t tmpfs -o size=4G
+    mount tmpfs /mnt/tmpfs_yinan1 -t tmpfs -o size=4G
 
 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
+    taskset -c 32 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_yinan0,share=on \
+    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu20-04.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: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
 
-4. On VM1, set virtio device IP and run arp protocal::
+    taskset -c 33 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_yinan1,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 \
+    -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
 
-	ifconfig ens5 1.1.1.2
-	arp -s 1.1.1.8 52:54:00:00:00:02
+3. On VM1, set virtio device IP and run arp protocal::
 
-5. On VM2, 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
 
-	ifconfig ens5 1.1.1.8
-	arp -s 1.1.1.2 52:54:00:00:00:01
+4. On VM2, set virtio device IP and run arp protocal::
 
-6. Check the iperf performance between two VMs by below commands::
+    ifconfig ens5 1.1.1.8
+    arp -s 1.1.1.2 52:54:00:00:00:01
 
-	Under VM1, run: `iperf -s -i 1`
-	Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
+5. Check the iperf performance between two VMs by below commands::
 
-7. Check 2VMs can receive and send big packets to each other::
+    Under VM1, run: `iperf -s -i 1`
+    Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
 
-	testpmd>  show port xstats all
-	Port 0 should have tx packets above 1522
-	Port 1 should have rx packets above 1522
+6. Check 2VMs can receive and send big packets to each other::
 
-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.
+    testpmd>show port xstats all
+    Port 0 should have tx packets above 1522
+    Port 1 should have rx packets above 1522
 
-1. Bind 16 CBDMA channels to vfio-pci, as common steps 1.
+Test Case 4: VM2VM vhost-user/virtio-net packed ring vhost async operation test with tcp traffic using 4K-pages and cbdma enable
+--------------------------------------------------------------------------------------------------------------------------------
+This case test the function of Vhost TSO in the topology of vhost-user/virtio-net packed ring mergeable path by verifing the TSO/cksum in the TCP/IP stack 
+when vhost uses the asynchronous operations with CBDMA channels in 4K-pages memory environment.
 
-2. Launch vhost by below command::
+1. Bind 2 CBDMA channels to vfio-pci, then 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
+    rm -rf vhost-net*
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 2-4 -n 4 --no-huge -m 1024 --file-prefix=vhost -a 0000:00:04.0 -a 0000:00:04.1 \
+    --vdev 'net_vhost0,iface=vhost-net0,queues=1,tso=1,dmas=[txq0;rxq0],dma_ring_size=2048' \
+    --vdev 'net_vhost1,iface=vhost-net1,queues=1,tso=1,dmas=[txq0;rxq0],dma_ring_size=2048' \
+    --iova=va -- -i --nb-cores=2 --txd=1024 --rxd=1024 --lcore-dma=[lcore3@0000:00:04.0,lcore4@0000:00:04.1]
+    testpmd>start
 
-	<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]
+2. Prepare tmpfs with 4K-pages::
+
+    mkdir /mnt/tmpfs_yinan0
+    mkdir /mnt/tmpfs_yinan1
+    mount tmpfs /mnt/tmpfs_yinan0 -t tmpfs -o size=4G
+    mount tmpfs /mnt/tmpfs_yinan1 -t tmpfs -o size=4G
+
+3. Launch VM1 and VM2::
 
-	testpmd> start
+    taskset -c 32 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_yinan0,share=on \
+    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu20-04.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: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
+
+    taskset -c 33 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_yinan1,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 \
+    -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, 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
+
+4. 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
+
+5. 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`
+
+6. 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 5: vm2vm vhost/virtio-net split ring multi queues using 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 operations with CBDMA channels in 4K-pages memory environment. The dynamic change of multi-queues number is also tested.
 
+1. Bind one port to vfio-pci, launch vhost::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -n 4 --no-huge -m 1024 --file-prefix=vhost -a 0000:00:04.0 -a 0000:00:04.1 -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=[lcore2@0000:00:04.0,lcore2@0000:00:04.1,lcore2@0000:00:04.2,lcore2@0000:00:04.3,lcore2@0000:00:04.4,lcore2@0000:00:04.5,lcore3@0000:00:04.6,lcore3@0000:00:04.7,lcore4@0000:80:04.0,lcore4@0000:80:04.1,lcore4@0000:80:04.2,lcore4@0000:80:04.3,lcore4@0000:80:04.4,lcore4@0000:80:04.5,lcore4@0000:80:04.6,lcore5@0000:80:04.7]
+    testpmd>start
+
+2. Prepare tmpfs with 4K-pages::
+
+    mkdir /mnt/tmpfs_yinan0
+    mkdir /mnt/tmpfs_yinan1
+    mount tmpfs /mnt/tmpfs_yinan0 -t tmpfs -o size=4G
+    mount tmpfs /mnt/tmpfs_yinan1 -t tmpfs -o size=4G
 
 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
+    taskset -c 32 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_yinan0,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 40 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/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
 
 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
+    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::
+4. 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
+    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::
+5. Scp 1MB file form VM1 to VM2::
 
-	Under VM1, run: `scp [xxx] root@1.1.1.8:/`   [xxx] is the file name
+    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::
+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`
+    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::
+7. 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
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -n 4 --no-huge -m 1024 --file-prefix=vhost -a 0000:00:04.0 -a 0000:00:04.1 -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;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
+    --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
+    --iova=va -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=8 --txq=8 \
+    --lcore-dma=[lcore2@0000:00:04.0,lcore2@0000:00:04.1,lcore2@0000:00:04.2,lcore2@0000:00:04.3,lcore3@0000:00:04.0,lcore3@0000:00:04.2,lcore3@0000:00:04.4,lcore3@0000:00:04.5,lcore3@0000:00:04.6,lcore3@0000:00:04.7,lcore4@0000:00:04.1,lcore4@0000:00:04.3,lcore4@0000:80:04.0,lcore4@0000:80:04.1,lcore4@0000:80:04.2,lcore4@0000:80:04.3,lcore4@0000:80:04.4,lcore4@0000:80:04.5,lcore4@0000:80:04.6,lcore5@0000:80:04.7]
+    testpmd>start
 
-9. Rerun step 6-7.
+8. Rerun step 5-6.
 
-10. Quit and relaunch vhost w/o CBDMA channels::
+11. 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 \
+	./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=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
+	testpmd>start
 
-11. On VM1, set virtio device::
+12. On VM1, set virtio device::
 
-	ethtool -L ens5 combined 4
+      ethtool -L ens5 combined 4
 
-12. On VM2, set virtio device::
+13. On VM2, set virtio device::
 
-	ethtool -L ens5 combined 4
+      ethtool -L ens5 combined 4
 
-13. Scp 1MB file form VM1 to VM2::
+14. 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::
+15. 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::
+16. 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
+     ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -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::
+17. On VM1, set virtio device::
 
-	ethtool -L ens5 combined 1
+      ethtool -L ens5 combined 1
 
-17. On VM2, set virtio device::
+18. On VM2, set virtio device::
 
-	ethtool -L ens5 combined 1
+      ethtool -L ens5 combined 1
 
-18. Scp 1MB file form VM1 to VM2M, check packets can be forwarding success by scp::
+19. 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
+     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::
+20. 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`
+     Under VM1, run: `iperf -s -i 1`
+     Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
+
+Test Case 6: vm2vm vhost/virtio-net packed ring multi queues using 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 
+packed ring mergeable path when vhost uses the asynchronous operations with CBDMA channels in 4K-pages memory environment. 
+
+1. Bind one port to vfio-pci, launch vhost::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -n 4 --no-huge -m 1024 --file-prefix=vhost -a 0000:00:04.0 -a 0000:00:04.1 -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=[lcore2@0000:00:04.0,lcore2@0000:00:04.1,lcore2@0000:00:04.2,lcore2@0000:00:04.3,lcore2@0000:00:04.4,lcore2@0000:00:04.5,lcore3@0000:00:04.6,lcore3@0000:00:04.7,lcore4@0000:80:04.0,lcore4@0000:80:04.1,lcore4@0000:80:04.2,lcore4@0000:80:04.3,lcore4@0000:80:04.4,lcore4@0000:80:04.5,lcore4@0000:80:04.6,lcore5@0000:80:04.7]
+    testpmd>start
+
+2. Prepare tmpfs with 4K-pages::
+
+    mkdir /mnt/tmpfs_yinan0
+    mkdir /mnt/tmpfs_yinan1
+    mount tmpfs /mnt/tmpfs_yinan0 -t tmpfs -o size=4G
+    mount tmpfs /mnt/tmpfs_yinan1 -t tmpfs -o size=4G
+
+3. Launch VM qemu::
+
+    taskset -c 32 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_yinan0,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,packed=on -vnc :10
+
+    taskset -c 40 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/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,packed=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
+
+4. 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
+
+5. Scp 1MB file form VM1 to VM2::
+
+    Under VM1, run: `scp [xxx] root@1.1.1.8:/`   [xxx] is the file name
+
+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`
+
+Test Case 7: vm2vm vhost/virtio-net split ring multi queues using 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 
+split ring mergeable path when vhost uses the asynchronous operations with CBDMA channels,the back-end is in 1G-pages memory environment and the front-end is in 4k-pages memory environment. 
+
+1. Bind 16 CBDMA channel to vfio-pci, launch vhost::
+
+    ./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
+
+    ./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,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
+    --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
+    --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
+
+2. Prepare tmpfs with 4K-pages::
+
+    mkdir /mnt/tmpfs_yinan0
+    mkdir /mnt/tmpfs_yinan1
+    mount tmpfs /mnt/tmpfs_yinan0 -t tmpfs -o size=4G
+    mount tmpfs /mnt/tmpfs_yinan1 -t tmpfs -o size=4G
+
+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_yinan0,share=on \
+    -numa node,memdev=mem -mem-prealloc -drive file=/home/image/ubuntu2004.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:10.239.251.220:6000-: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::
 
-Test Case 5: vm2vm vhost/virtio-net split packed ring multi queues with 1G/4k-pages and cbdma enable
+    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::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1-5 -n 4 --no-huge -m 1024 --file-prefix=vhost -a 0000:00:04.0 -a 0000:00:04.1 -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;rxq0;rxq1;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
+    --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6;txq7;rxq0;rxq1;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
+    --iova=va -- -i --nb-cores=4 --txd=1024 --rxd=1024 --rxq=8 --txq=8 \
+    --lcore-dma=[lcore2@0000:00:04.0,lcore2@0000:00:04.1,lcore2@0000:00:04.2,lcore2@0000:00:04.3,lcore3@0000:00:04.0,lcore3@0000:00:04.2,lcore3@0000:00:04.4,lcore3@0000:00:04.5,lcore3@0000:00:04.6,lcore3@0000:00:04.7,lcore4@0000:00:04.1,lcore4@0000:00:04.3,lcore4@0000:80:04.0,lcore4@0000:80:04.1,lcore4@0000:80:04.2,lcore4@0000:80:04.3,lcore4@0000:80:04.4,lcore4@0000:80:04.5,lcore4@0000:80:04.6,lcore5@0000:80:04.7]
+    testpmd>start
+
+9. Rerun step 6-7.
+
+Test Case 8: 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.
+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 and packed ring mergeable path when vhost uses the asynchronous operations with CBDMA channels,the back-end is in 1G-pages memory environment and the front-end is in 4k-pages memory environment. 
+
+1. Bind 16 CBDMA channel to vfio-pci, launch vhost::
 
-1. Bind 16 CBDMA channel to vfio-pci, as common steps 1.
+    ./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
 
-2. Launch vhost by below command::
+    ./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,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
+    --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;rxq2;rxq3;rxq4;rxq5;rxq6;rxq7]' \
+    --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
 
-	./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
+2. Prepare tmpfs with 4K-pages::
 
-	<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
+    mkdir /mnt/tmpfs_yinan0
+    mkdir /mnt/tmpfs_yinan1
+    mount tmpfs /mnt/tmpfs_yinan0 -t tmpfs -o size=4G
+    mount tmpfs /mnt/tmpfs_yinan1 -t tmpfs -o size=4G
 
 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
+    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_yinan0,share=on \
+    -numa node,memdev=mem -mem-prealloc -drive file=/home/image/ubuntu2004.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:10.239.251.220:6000-: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,packed=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
+    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
+    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
+    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`
+    Under VM1, run: `iperf -s -i 1`
+    Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 60`
+
+8. Relaunch VM1, and rerun step 4.
+
+9. Rerun step 6-7.