I'm not sure, I know there's a kernel command line argument that activates support for it, then there might be something also within your libvirt XML and QEMU command-line?
On Thu, Apr 6, 2017 at 8:00 AM, P. Pronk <v...@pronk.nl> wrote: > > With regards to your first question, I am using an E5-1620v4 with X99 > chipset but I am not sure how I can check for you if the 16xx supports > this. Let me know if you would like me to check something specifically. > > Kind regards, Pim > > On 06/04/17 13:18, Joshua Lee wrote: > > I'm not clear if posted interrupts, a feature of Broadwell-EP, is > available on both E5 1xxx V4 and E5 2xxx V4, or just E5 2xxx V4? Intel's > marketing literature seems to stress the latter family of processors as > having it, but reviews on sources such as Anandtech do not mention anything > but Broadwell-EP E5 Xeons having it in general. > > Also, a second question, what amount of performance increase in GPU > performance could one expect for a KVM/QEMU virtual machine with PCIE VGA > passthrough using the posted interrupt feature of Broadwell-EP Xeons, using > say a 1620 V4, 1630 V4, or 1650 V4, assuming those have the feature (if > not, insert a frequency-optimized E5 2xxx instead) versus say a i7-5820k? > > > _______________________________________________ > vfio-users mailing > listvfio-users@redhat.comhttps://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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