[Bug 218739] pmu_counters_test kvm-selftest fails with (count != NUM_INSNS_RETIRED)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218739

mlevitsk@redhat.com changed:

           What    |Removed                     |Added
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                 CC|                            |mlevitsk@redhat.com

--- Comment #2 from mlevitsk@redhat.com ---
Adding my .02 cents:

I also see this test fail sometimes (once per hour or so of continuous running)
 and in my case it fails because 'count != 0' assert on
INTEL_ARCH_LLC_MISSES_INDEX event and only for this event.

The reason is IMHO, is that it is possible  to have 0 LLC misses if the cache
is large enough and code was run for enough iterations.

I wasn't able to make the test fail for other reasons (I only tested non-nested
case so far, nested this test also fails sometimes)

Best regards,
        Maxim Levitsky

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