Re: [libvirt] Add hyperthreaded sibling info to virsh capabilities

29 Oct 2012

      On Wed, Oct 17, 2012 at 5:34 PM, Eric Blake <eblake@redhat.com> wrote:
...
On 10/17/2012 03:06 PM, Dusty Mabe wrote:
...
Hi,
Would it be possible to augment the output produced in virsh
capabilities to also provide the hyperthreaded sibling of a processor?
For example the information would look something like:
<topology>
<cells num='2'>
        <cell id='0'>
          <cpus num='8'>
            <cpu id='1' sibling='9'/>
Indeed, that sounds useful, and it is strictly additive so there is no
technical reason preventing that addition.
Along the same lines, I am considering adding numacell memory
information to this output. Some options for formatted output would
be:

<topology>
  <cells num='2'>
    <cell id='0' memoryKB='8386504'>
      <cpus num='8'>
        <cpu id='1' sibling='9'/>
         .
         .
      </cpus>
    </cell>
  </cells>
</topology>

or, more similar to the guest xml

<topology>
  <cells num='2'>
    <cell id='0'>
      <memory unit='KiB'>8386504</memory>
      <cpus num='8'>
        <cpu id='1' sibling='9'/>
         .
         .
      </cpus>
    </cell>
  </cells>
</topology>

There are a lot of options here for how to format the output. I don't
anticipate the unit of KiB to change since that is what is in the
/sys/devices/system/node/node0/meminfo files.

Thoughts?

Dusty