----- Messaggio originale ----- > Da: "Eric Blake" <eblake@xxxxxxxxxx> > A: "Osier Yang" <jyang@xxxxxxxxxx> > Cc: libvir-list@xxxxxxxxxx, pbonzini@xxxxxxxxxx > Inviato: Lunedì, 1 aprile 2013 18:43:11 > Oggetto: Re: [PATCH] qemu: Support multiple queue virtio-scsi > > On 04/01/2013 10:31 AM, Osier Yang wrote: > > No, multiple queue is not enabled by default. For "what happens if it > > doesn't match the number of vcpus", honestly, I'm not sure about it, > > my understanding is it doesn't have to match. But matching will have > > the best performance, and with this thought I think an attribute allows > > the user to specify the number makes sense instead of a boolean > > attribute. @paolo, can you confirm or deny this? > > Then maybe all we need is just a recommendation that matching the number > of vcpus tends to give best performance, but not stating that it is > mandatory to match. I think in the current patches anything that doesn't exactly matches the number of VCPUs will fallback to single-queue. But it doesn't have to be the case, so a numeric attribute is preferrable. Paolo -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list