DPDK系列之十：qemu-kvm不同网络前端和后端网络性能对比测试

r囧r小猫 2022-05-24 05:21 201阅读 0赞

**一、前言**

本文通过改变如下一些变量来对qemu-kvm不同的网络前端和后端的组合进行性能测试：

- default qemu 1.5.3 vs qemu 2.11.0
    - virtual NIC inside guest VM use virtio or e1000
    - vNIC tx/rx queue size
    - default bridge virbr0 vs ovs bridge
    - OVS normal mode bridge VS OVS DPDK mode bridge
    - DPDK vhost-net with vhost-user support for VM virtio
    - tap device with OVS DPDK device for best VM
    - normal nginx in VM VS f-stack(DPDK) nginx
    - how many cores f-stack nginx use, 1 or 2
    - disk use virtio or not
    - guest and host memory share method: ivshmem or vhost

转载自https://blog.csdn.net/cloudvtech

**二、测试环境**

宿主虚拟机的配置

6 CPU, 8GB memory 3NICs, 40GB disk
    uname -a
    Linux ovs-dpdk 3.10.0-693.11.1.el7.x86_64 #1 SMP Mon Dec 4 23:52:40 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
    
    CentOS default qemu-kvm
    [root@kvm-host ~]# /usr/libexec/qemu-kvm --version
    QEMU emulator version 1.5.3 (qemu-kvm-1.5.3-141.el7_4.6), Copyright (c) 2003-2008 Fabrice Bellard
    
    source built Qemu-kvm to support DPDK:
    [root@kvm-host ~]# /root/qemu-2.11.0/x86_64-softmmu/qemu-system-x86_64 --version
    QEMU emulator version 2.11.0
    Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers

guest虚拟机的配置

2GB memory and 1 vCPUs

转载自https://blog.csdn.net/cloudvtech

**三、测试结果**

3.1 测试1

- qemu 1.5.3 
        - guest vNIC with without virtio
        - virbr0 bridge
        - tap device
        - normal nginx
    result:
        CPU: 100%
        wrk结果:

![70][]

3.2 测试2

- qemu 1.5.3 
        - guest vNIC with WITH virtio
        - virbr0 bridge
        - tap device
        - normal nginx
    result:
        CPU: 100%
        wrk结果:

![70 1][]

3.3 测试3

- qemu 1.5.3 
        - guest vNIC with WITH virtio
        - virbr0 bridge
        - tap device
        - f-stack nginx with one core
    result:
        CPU: 100%x1
        wrk结果:

![70 2][]

3.4 测试4

- qemu 2.11.0
        - guest vNIC with WITHOUT virtio
        - virbr0 bridge
        - tap device
        - normal nginx with one core
    result:
        CPU: 100%x1
        wrk解果:

![70 3][]

3.5 测试5

- qemu 2.11.0
        - guest vNIC with WITH virtio
        - ovs DPDK bridge
        - tap device
        - normal nginx with one core
    result:
        CPU: 100%x1
        wrk结果:

![70 4][]

3.6 测试6

- qemu 2.11.0
        - guest vNIC with WITH virtio
        - ovs DPDK bridge
        - tap device
        - f-stack nginx with one core
    result:
        CPU: 100%x1
        wrk:

NOT PERFORMANED DUE TO F-STACK DOES NOT SUPPORT DPDK OVS PORTS INSIDE QEMU-KVM VM

转载自https://blog.csdn.net/cloudvtech

[70]: /images/20220524/5c3e67632e7249d2ba57af070c86785d.png
[70 1]: /images/20220524/e695a3117a28457aba0e133a0b61d301.png
[70 2]: /images/20220524/edab215152f841d88ca88217d2cde0ec.png
[70 3]: /images/20220524/d6bca45fdd8b48c7951d6ada3e499c40.png
[70 4]: /images/20220524/43ed5acfdf714f998efd87a83a370c30.png