Oh awesome. I was not aware of "lstopo". Thanks! Interesting thing - for me "virsh capabilities" and "lstopo" display same information. id, core_id and siblings values seem to match. I mean id is always same as core_id therefore siblings value makes sense. No idea why its different on your cpu. Technical stuff im not aware of.
On 2016.03.05 01:37, Jeff wrote: > The output of lstopo shows that 0-6, 1-7, etc... are paired, which is > what I originally assumed (as a 4790k is 0-4, 1-5, with similar > architecture so I'd assume similar), but different from the virsh > capabilities output (which did not list siblings correctly for me) > Pic: https://www.dropbox.com/s/m79l36e32f08b8d/out.png?dl=0 > XML: https://www.dropbox.com/s/wr93edyszlpcosm/summary.xml?dl=0 > So with all of that said, is it safe to say the pairings are 0-6, 1-7, > 2-8, 3-9, 4-10, 5-11 for a 5930k? > Just want to make sure. > Thanks! > > > On Fri, Mar 4, 2016 at 1:09 PM, Jeff <bunge...@gmail.com > <mailto:bunge...@gmail.com>> wrote: > > Interesting, relevant results below: > > <topology> > <cells num='1'> > <cell id='0'> > <memory unit='KiB'>32839588</memory> > <cpus num='12'> > <cpu id='0' socket_id='0' core_id='0' siblings='0'/> > <cpu id='1' socket_id='0' core_id='0' siblings='1'/> > <cpu id='2' socket_id='0' core_id='1' siblings='2'/> > <cpu id='3' socket_id='0' core_id='1' siblings='3'/> > <cpu id='4' socket_id='0' core_id='2' siblings='4'/> > <cpu id='5' socket_id='0' core_id='2' siblings='5'/> > <cpu id='6' socket_id='0' core_id='3' siblings='6'/> > <cpu id='7' socket_id='0' core_id='3' siblings='7'/> > <cpu id='8' socket_id='0' core_id='4' siblings='8'/> > <cpu id='9' socket_id='0' core_id='4' siblings='9'/> > <cpu id='10' socket_id='0' core_id='5' siblings='10'/> > <cpu id='11' socket_id='0' core_id='5' siblings='11'/> > </cpus> > </cell> > </cells> > </topology> > > The siblings value is equal to the cpu id, however the core_id > looks to be on to something! > So if that is correct, the pairings would then be cpu id 0 &1 = > core_id 0, cpu id 2 &3 = core_id 1, etc... > Does the output for yours show the siblings value differently (as > you explained it would then be cpuid 0 = siblings 1, etc...)? > > On Fri, Mar 4, 2016 at 10:31 AM, Rokas Kupstys <rok...@zoho.com > <mailto:rok...@zoho.com>> wrote: > > Run "virsh capabilities" and look for <cpus> tag. It lists > core siblings. Its what you are looking for right? For me this > script also is little inconclusive, however seems like libvirt > lists siblings right as i cant pin one core to two physical > cores that are not siblings. > > > On 2016.03.04 16:34, Jeff wrote: >> I'm trying to distinguish which cores are which on my Intel >> 5930k processor. >> I ran the script at the console, with no other additional >> VM's, Docker, or plugins running (I'm running UnRAID). >> My output doesn't show any real differences between the >> cores, all 4's and 5's, with the expected 10 to itself. >> I had to modify the script a little to run (locations for >> netperf and BC), but that's really it. >> Nothing else special to report, no messing with governors, or >> the like. >> The output of the script (pic) is located >> here >> https://www.dropbox.com/s/nfyacpvqwy74mi2/IMG_20160302_195344%20%281%29.jpg?dl=0 >> >> Thanks! >> >> >> _______________________________________________ >> vfio-users mailing list >> vfio-users@redhat.com <mailto:vfio-users@redhat.com> >> https://www.redhat.com/mailman/listinfo/vfio-users > > > _______________________________________________ > vfio-users mailing list > vfio-users@redhat.com <mailto:vfio-users@redhat.com> > https://www.redhat.com/mailman/listinfo/vfio-users > > > > > > _______________________________________________ > vfio-users mailing list > vfio-users@redhat.com > https://www.redhat.com/mailman/listinfo/vfio-users
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