Okay wow, Alex. That made a huge difference immediately. That dropped me from 90% to 33% on the main thread, and all the children are below 10%.
On Sun, Apr 3, 2016 at 8:07 PM, Alex Williamson <alex.l.william...@gmail.com > wrote: > If this is the issue I think it is, the unraid folks bisected this and > found the culprit as: > > aca6ff2 KVM: dynamic halt-polling > > ( > https://github.com/torvalds/linux/commit/aca6ff29c4063a8d467cdee241e6b3bf7dc4a171 > ) > > It seems to be a poor interaction of the halt polling interval vs the > timer ticks on win10. You can pick a different polling interval with the > kvm module option halt_poll_ns. The default is 500000. It seemed that > setting this to 400000 or lower resolves the issue. You can do this via a > modprobe entry, 'options kvm halt_poll_ns=400000' or on the kernel command > line with kvm.halt_poll_ns=400000. You can also change it dynamically via > 'echo 400000 > /sys/module/kvm/parameters/halt_poll_ns' > > _______________________________________________ > vfio-users mailing list > vfio-users@redhat.com > https://www.redhat.com/mailman/listinfo/vfio-users > >
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