Messages in this thread |  | | Subject | Re: [PATCH 0/2] powerpc/kvm: Enable running guests on RT Linux | From | Scott Wood <> | Date | Thu, 9 Apr 2015 18:53:31 -0500 |
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On Thu, 2015-04-09 at 10:44 +0300, Purcareata Bogdan wrote: > So at this point I was getting kinda frustrated so I decided to measure > the time spend in kvm_mpic_write and kvm_mpic_read. I assumed these were > the main entry points in the in-kernel MPIC and were basically executed > while holding the spinlock. The scenario was the same - 24 VCPUs guest, > with 24 virtio+vhost interfaces, only this time I ran 24 ping flood > threads to another board instead of netperf. I assumed this would impose > a heavier stress. > > The latencies look pretty ok, around 1-2 us on average, with the max > shown below: > > .kvm_mpic_read 14.560 > .kvm_mpic_write 12.608 > > Those are also microseconds. This was run for about 15 mins.
What about other entry points such as kvm_set_msi() and kvmppc_mpic_set_epr()?
-Scott
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