I'm interesarían the vcpu pining part El 27 ene. 2017 8:51 p. m., "Zachary Boley" <zbole...@gmail.com> escribió:
I don't understand numa but I have about the same setup (2x 5540s) which I've pinned respectively and everything seems alright as far as I can help perhaps, but have you looked into hugepages if that's your main issue? On Jan 27, 2017 1:21 PM, "sL1pKn07 SpinFlo" <sl1pk...@gmail.com> wrote: > Can you share the New vcpu config? > > Im intereses because have, more or less, the same configuration (2x xeon > x5650) > > Greetings > > El 27 ene. 2017 6:04 p. m., "Jan Wiele" <j...@wiele.org> escribió: > >> Am Freitag, 27. Januar 2017, 08:52:50 CET schrieb Alex Williamson: >> > On Fri, 27 Jan 2017 11:58:05 +0100 >> > >> > Jan Wiele <j...@wiele.org> wrote: >> > > Hi, >> > > I've two E5-2670 CPUs and want to pin a VM to a node. CPU pinning >> works >> > > fine, however memory allocation seems to happen randomly. Sometimes >> it is >> > > done on node 0, sometimes on node 1. >> > > >> > > My VM config: http://pastebin.com/raw/J6trq7gJ >> > > I'm on Arch Linux Kernel 4.8.13-1 with libvirt 2.4.0-2 >> > > >> > > Any ideas? >> > >> > Looks like it should work to me. I've certainly tested this sort of >> > setup on RHEL and Fedora in the past and it did the right thing. >> >> > Your >> > vcpupin actually looks a little off though, just like on the host, the >> > VM is going to enumerate cores then threads, this is why your numactl >> > info shows node0 w/ {0-7,16-23}, node1 w/ {8-15,24-31}, ie. >> > {cores,threads}. By interleaving the node1 pinning as you've done, the >> > mapping is off in the VM. For instance, the guest will think CPU0 and >> > CPU6 are threads on the same core, but they're mapped to CPU8 and CPU11 >> > on the host, which are unrelated. >> Thanks! I will fix that. (I think I did this because of a user, who >> reported >> slightly better performance, in the old archlinux-vfio-thread) >> >> > I know that doesn't help your >> > numatune issue though. >> >> Do you know which part of the system will actually allocate the memory on >> the >> specified node? Should I see some information about this in the qemu >> command >> line parameters? >> >> _______________________________________________ >> vfio-users mailing list >> 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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