mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-25 23:25:24 +00:00
017abcbb1a
For virtio disks and interfaces, qemu allows users to enable or disable ioeventfd feature. This means, qemu can execute domain code, while another thread waits for I/O event. Basically, in some cases it is win, in some loss. This feature is available via 'ioeventfd' attribute in disk and interface <driver> element. It accepts 'on' and 'off'. Leaving this attribute out defaults to hypervisor decision.
51 lines
1.6 KiB
XML
51 lines
1.6 KiB
XML
<domain type='qemu'>
|
|
<name>test</name>
|
|
<memory>1048576</memory>
|
|
<vcpu>1</vcpu>
|
|
<os>
|
|
<type arch='x86_64' machine='pc-0.13'>hvm</type>
|
|
<boot dev='cdrom'/>
|
|
<boot dev='hd'/>
|
|
<bootmenu enable='yes'/>
|
|
</os>
|
|
<clock offset='utc'/>
|
|
<on_poweroff>destroy</on_poweroff>
|
|
<on_reboot>restart</on_reboot>
|
|
<on_crash>restart</on_crash>
|
|
<devices>
|
|
<emulator>/usr/bin/qemu</emulator>
|
|
<disk type='file' device='disk'>
|
|
<driver name='qemu' type='qcow2' ioeventfd='on'/>
|
|
<source file='/var/lib/libvirt/images/f14.img'/>
|
|
<target dev='vda' bus='virtio'/>
|
|
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
|
|
</disk>
|
|
<disk type='file' device='cdrom'>
|
|
<driver name='qemu' type='raw'/>
|
|
<source file='/var/lib/libvirt/Fedora-14-x86_64-Live-KDE.iso'/>
|
|
<target dev='hdc' bus='ide'/>
|
|
<readonly/>
|
|
<address type='drive' controller='0' bus='1' unit='0'/>
|
|
</disk>
|
|
<interface type='user'>
|
|
<mac address='52:54:00:e5:48:58'/>
|
|
<model type='virtio'/>
|
|
<driver name='vhost' txmode='iothread' ioeventfd='off'/>
|
|
</interface>
|
|
<controller type='virtio-serial' index='0'>
|
|
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
|
|
</controller>
|
|
<serial type='pty'>
|
|
<target port='0'/>
|
|
</serial>
|
|
<console type='pty'>
|
|
<target type='serial' port='0'/>
|
|
</console>
|
|
<graphics type='vnc' port='5091' autoport='no' listen='127.0.0.1'/>
|
|
<video>
|
|
<model type='vga' vram='9216' heads='1'/>
|
|
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
|
|
</video>
|
|
</devices>
|
|
</domain>
|