各种模式虚拟化的网络性能对比测试

dpdk+ovs 与 物理机 与 sriov(pci passthrough) 纯粹的linux bridge的性能对比

CPU E5-2680V2 2.8G，网卡 ixgbe intel 82599。

模式/并发-----pps	20	40	80
物理机	9.7W	17.3W	16.5W
dpdk + ovs + vhost-user	18.5W	30.8W	48W
sriov(pci passthrough)	17.5W	29W	48W
linux-bridge	10W	16.7W	20W

测试方法：路由转发

结构为：A------R------B

实际上R有两块网卡，有4个方向的数据包，本测试只取其中之一，同时使用了LINUX的路由功能做测试，所以不做为各种技术的基准测试参考，只是一个相对值。

A做netserver，R替换为以上各种模式的机器，B做netperf的客户端

分别使用netperf做20、40、80并发并绑定CPU进行TCP_RR测试。

dpdk-ovs-vhost-user的xml:

<domain type='kvm'>
<name>vm1</name>
<memory unit='KiB'>8388608</memory>
<currentMemory unit='KiB'>4194304</currentMemory>
<memoryBacking>
<hugepages>
<page size='1024' unit='M' nodeset='0'/>
</hugepages>
</memoryBacking>
<cpu mode='host-model'>
<model fallback='allow'/>
<numa>
<cell id='0' cpus='0-1' memory='4194304' unit='KiB' memAccess='shared'/>
</numa>
</cpu>
<vcpu placement='static' current='2'>16</vcpu>
<os>
<type arch='x86_64' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='localtime'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='writeback'/>
<source file='/home/vm_workspace/vm1.qcow2'/>
<target dev='vda' bus='virtio'/>
</disk>
<controller type='pci' index='0' model='pci-root'>
<alias name='pci.0'/>
</controller>

<interface type='vhostuser'>
<mac address='52:54:00:00:06:00'/>
<source type='unix' path='/var/run/openvswitch/vhost-user-0' mode='client'/>
<model type='virtio'/>
<driver name='vhost' queues='2'>
<host mrg_rxbuf='on'/>
</driver>
</interface>
<interface type='vhostuser'>
<mac address='52:54:00:00:06:01'/>
<source type='unix' path='/var/run/openvswitch/vhost-user-1' mode='client'/>
<model type='virtio'/>
<driver name='vhost' queues='2'>
<host mrg_rxbuf='on'/>
</driver>
</interface>
<serial type='pty'/>
<input type='tablet' bus='usb'/>
<graphics type='vnc' autoport='yes' keymap='en-us' listen='0.0.0.0'/>
<video>
<model type='cirrus'/>
</video>
<memballoon model='virtio'>
<stats period='10'/>
</memballoon>
</devices>
</domain>

sriov-passthrough的xml

<domain type='kvm'>
<name>vm1</name>
<memory>1024000</memory>
<cpu mode='host-passthrough'>
<cache mode='passthrough'/>
</cpu>
<vcpu placement='static' cpuset='0-3'>3</vcpu>
<os>
<type arch='x86_64' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='localtime'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='writeback'/>
<source file='/home/vm_workspace/vm1.qcow2'/>
<target dev='vda' bus='virtio'/>
</disk>
   <interface type='hostdev' managed='yes'>
     <source>
       <address type='pci' domain='0' bus='0x02' slot='0x10' function='0x00'/>
     </source>
     <mac address='52:54:00:6d:90:00'/>
     <vlan>
        <tag id='4000'/>
     </vlan>
   </interface>
   <interface type='hostdev' managed='yes'>
     <source>
       <address type='pci' domain='0' bus='0x02' slot='0x10' function='0x01'/>
     </source>
     <mac address='52:54:00:6d:90:01'/>
     <vlan>
        <tag id='4001'/>
     </vlan>
   </interface>

<serial type='pty'/>
<input type='tablet' bus='usb'/>
<graphics type='vnc' autoport='yes' keymap='en-us' listen='0.0.0.0'/>
<video>
<model type='cirrus'/>
</video>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<memballoon model='virtio'>
<stats period='10'/>
</memballoon>
</devices>
</domain>

linux-bridge的xml

<domain type='kvm'>
<name>vm1</name>
<memory>1024000</memory>
<cpu mode='host-passthrough'>
<cache mode='passthrough'/>
</cpu>
<vcpu placement='static' cpuset='0-3'>3</vcpu>
<os>
<type arch='x86_64' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='localtime'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='writeback'/>
<source file='/home/vm_workspace/vm1.qcow2'/>
<target dev='vda' bus='virtio'/>
</disk>

<interface type='bridge'>
<model type='virtio'/>
<source bridge='br-ext'/>
</interface>

<interface type='bridge'>
<model type='virtio'/>
<source bridge='br-int'/>
</interface>

<serial type='pty'/>
<input type='tablet' bus='usb'/>
<graphics type='vnc' autoport='yes' keymap='en-us' listen='0.0.0.0'/>
<video>
<model type='cirrus'/>
</video>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<memballoon model='virtio'>
<stats period='10'/>
</memballoon>
</devices>
</domain>