[libvirt-users] SR-IOV Pool Availability

[hongming]

On 08/28/2013 05:25 AM, Brian Rak wrote:
> If I'm using the SR-IOV Pool assignment method (from 
> http://wiki.libvirt.org/page/Networking#Assignment_from_a_pool_of_SRIOV_VFs_in_a_libvirt_.3Cnetwork.3E_definition 
> ), how would I check how many virtual functions are already in use?

Hi Brian

Hope the following can help you.


[root at sriov2 images]# virsh net-dumpxml hostnet
<network>
   <name>hostnet</name>
   <uuid>6b49be3c-bb91-c16d-b475-2929678720f4</uuid>
   <forward mode='hostdev' managed='yes'>
     <pf dev='eth2'/>
   </forward>
</network>

[root at sriov2 images]# virsh start r6
Domain r6 started

[root at sriov2 images]# virsh attach-device r6 vfpool.xml
Device attached successfully

[root at sriov2 images]# virsh attach-device r6 vfpool.xml
Device attached successfully

[root at sriov2 images]# virsh net-dumpxml hostnet
<network *connections='2'*> *<=====the value of connections means how 
many VFs in the pool are using.*
   <name>hostnet</name>
   <uuid>6b49be3c-bb91-c16d-b475-2929678720f4</uuid>
   <forward mode='hostdev' managed='yes'>
     <pf dev='eth2'/>
     <address type='pci' domain='0x0000' bus='0x0f' slot='0x10' 
function='0x0'/>
     <address type='pci' domain='0x0000' bus='0x0f' slot='0x10' 
function='0x2'/>
     <address type='pci' domain='0x0000' bus='0x0f' slot='0x10' 
function='0x4'/>
     <address type='pci' domain='0x0000' bus='0x0f' slot='0x10' 
function='0x6'/>
     <address type='pci' domain='0x0000' bus='0x0f' slot='0x11' 
function='0x0'/>
     <address type='pci' domain='0x0000' bus='0x0f' slot='0x11' 
function='0x2'/>
     <address type='pci' domain='0x0000' bus='0x0f' slot='0x11' 
function='0x4'/>
   </forward>
</network>


>
> Is there a method other then looping through all the active guests and 
> determining if they're using the SR-IOV interface?
>
[root at sriov2 images]# virsh dumpxml r6|grep interface -A 4
     <interface type='network'>
       <mac address='52:54:00:0a:16:28'/>
       <source network=*'hostnet'/*>
       <alias name='*hostdev0'/*>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x03' 
function='0x0'/>
     </interface>
     <interface type='network'>
       <mac address='52:54:00:08:62:66'/>
       <source network='*hostnet'*/>
       <alias name='*hostdev1*'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x07' 
function='0x0'/>
     </interface>

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