253. vhost/virtio-user pvp with 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.

253.1. Prerequisites¶

Turn off transparent hugepage in grub by adding GRUB_CMDLINE_LINUX=”transparent_hugepage=never”

253.1.1. Test Case1: Basic test vhost/virtio-user split ring with 4K-pages¶

Bind one port to vfio-pci, launch vhost:

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 \
--vdev 'net_vhost0,iface=/tmp/vhost-net,queues=1' -- -i --no-numa --socket-num=0
testpmd>start

Prepare tmpfs with 4K-pages:

mkdir /mnt/tmpfs_yinan
mount tmpfs /mnt/tmpfs_yinan -t tmpfs -o size=4G

Launch virtio-user with 4K-pages:

./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=00:11:22:33:44:10,path=/tmp/vhost-net,queues=1 -- -i
testpmd>start

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
```

253.1.2. Test Case2: Basic test vhost/virtio-user packed ring with 4K-pages¶

Bind one port to vfio-pci, launch vhost:

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 \
--vdev 'net_vhost0,iface=/tmp/vhost-net,queues=1' -- -i --no-numa --socket-num=0
testpmd>start

Prepare tmpfs with 4K-pages:

mkdir /mnt/tmpfs_yinan
mount tmpfs /mnt/tmpfs_yinan -t tmpfs -o size=4G

Launch virtio-user with 4K-pages:

./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=00:11:22:33:44:10,path=/tmp/vhost-net,packed_vq=1,queues=1 -- -i
testpmd>start

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
```