[libvirt-users] NUMA VM and assigning interfaces
Amir Shehata
amir.shehata.whamcloud at gmail.com
Mon Nov 21 21:48:29 UTC 2016
Laine,
Thank you for your response.
I did use the numa element instead of using qemu commandline and that
worked:
16 <cpu mode='custom' match='exact'>
...
34 <numa>
35 <cell id='0' cpus='0-1' memory='1048576' unit='KiB'/>
36 <cell id='1' cpus='2-3' memory='1048576' unit='KiB'/>
37 </numa>
38 </cpu>
However, whenever I try to use the pci-expander-bus I get:
error: XML document failed to validate against schema: Unable to validate
doc against /usr/share/libvirt/schemas/domain.rng
Extra element devices in interleave
Element domain failed to validate content
I tried the following
93 <controller type='pci' index='1' model='pci-expander-bus'>
94 <address type='pci' domain='0x0000' bus='0x00' slot='0x0b'
function='0x0'/>
95 </controller>
and
93 <controller type='pci' index='1' model='pci-expander-bus'>
94 <target busNr='254'>
95 <node>1</node>
96 </target>
97 <address type='pci' domain='0x0000' bus='0x00' slot='0x0b'
function='0x0'/>
98 </controller>
I got the syntax from:
https://www.redhat.com/archives/libvir-list/2016-March/msg01224.html
Just to give you a bit more info. This is running on:
Linux ashehata-DellPE 3.19.0-51-generic #58-Ubuntu SMP Fri Feb 26 21:22:26
UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
below is a dump of the working XML file I'm using
thanks
amir
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<name>MR_test01</name>
<uuid>59eafc3c-9d9e-4dab-bac9-48003048c6dc</uuid>
<memory unit='KiB'>2097152</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<vcpu placement='static'>4</vcpu>
<os>
<type arch='x86_64' machine='pc-i440fx-utopic'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<cpu mode='custom' match='exact'>
<model fallback='allow'>core2duo</model>
<vendor>Intel</vendor>
<feature policy='require' name='pbe'/>
<feature policy='require' name='tm2'/>
<feature policy='require' name='ds'/>
<feature policy='require' name='ss'/>
<feature policy='require' name='dtes64'/>
<feature policy='require' name='ht'/>
<feature policy='require' name='dca'/>
<feature policy='require' name='lahf_lm'/>
<feature policy='require' name='tm'/>
<feature policy='require' name='cx16'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='ds_cpl'/>
<feature policy='require' name='pdcm'/>
<feature policy='require' name='xtpr'/>
<feature policy='require' name='acpi'/>
<numa>
<cell id='0' cpus='0-1' memory='1048576' unit='KiB'/>
<cell id='1' cpus='2-3' memory='1048576' unit='KiB'/>
</numa>
</cpu>
<clock offset='utc'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<pm>
<suspend-to-mem enabled='no'/>
<suspend-to-disk enabled='no'/>
</pm>
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/media/ashehata/Lustre03/kvm-linux2/disk1.qcow2'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x09'
function='0x0'/>
</disk>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/media/ashehata/Lustre03/kvm-linux2/disk4.qcow2'/>
<target dev='vdb' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0b'
function='0x0'/>
</disk>
<disk type='block' device='cdrom'>
<driver name='qemu' type='raw'/>
<target dev='hda' bus='ide'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='usb' index='0' model='ich9-ehci1'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08'
function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08'
function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08'
function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08'
function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x1'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07'
function='0x0'/>
</controller>
<interface type='network'>
<mac address='52:54:00:da:1b:af'/>
<source network='default'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
<interface type='network'>
<mac address='52:54:00:84:0a:66'/>
<source network='default'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</interface>
<interface type='network'>
<mac address='52:54:00:17:9d:cd'/>
<source network='default'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05'
function='0x0'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<channel type='spicevmc'>
<target type='virtio' name='com.redhat.spice.0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='tablet' bus='usb'/>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='spice' autoport='yes'/>
<sound model='ich6'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</sound>
<video>
<model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</video>
<redirdev bus='usb' type='spicevmc'>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
</redirdev>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0a'
function='0x0'/>
</memballoon>
</devices>
<qemu:commandline>
<qemu:arg value='-gdb'/>
<qemu:arg value='tcp::1201'/>
</qemu:commandline>
</domain>
On 21 November 2016 at 11:40, Laine Stump <laine at laine.org> wrote:
> On 11/21/2016 12:34 PM, Amir Shehata wrote:
>
>> Hello,
>>
>> Hope all is well.
>>
>> I've been looking at how I can create a virtual machine which is NUMA
>> capable. I was able to do that by:
>>
>> 140 <qemu:commandline>
>> 143 <qemu:arg value='-numa'/>
>> 144 <qemu:arg value='node'/>
>> 145 <qemu:arg value='-numa'/>
>> 146 <qemu:arg value='node'/>
>> 147 </qemu:commandline>
>>
>
> qemu commandline passthrough should only be used for qemu features that
> libvirt doesn't support directly (and even then it's only intended as a
> temporary stopgap until the feature gains official libvirt support). NUMA
> has been supported by libvirt for quite a long time.
>
> If you open http://www.libvirt.org/formatdomain.html and search for
> "numa" you'll find descriptions of the configuration for defining NUMA
> memory regions, and assigning particular CPUs to particular nodes. The is
> also a small bit about defining a pci-expander-bus (a type of pci
> controller) and tying it to a particular NUMA node - this is how you can
> place a guest device on a particular NUMA node; just assign the device a
> PCI address that has the given pci-expander-bus' "index" as its "bus"
> attribute.
>
>
>> This creates two NUMA nodes.
>>
>> Now I would like to assign my virtual network interfaces, of which I have
>> three, to the different NUMA nodes on the VM.
>>
>> Anyone know how I can do that? Any help/pointers would be much
>> appreciated.
>>
>> I'm trying to create a VM that will enable me to test a NUMA based
>> feature.
>>
>
> The one thing I'm unclear about is whether the guest can be setup with
> NUMA nodes when the host itself doesn't have multiple NUMA nodes...
>
>
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