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SubjectRe: perf: multiplexing broken on amd fam16h?
On Tue, Jul 21, 2015 at 02:14:54PM -0400, Vince Weaver wrote:
> Hello
>
> I have a new AMD A8 system and perf multiplexing support is acting weird.
>
> If I run the perf_event_tests check_multiplexing test it fails like this:
>
> Event TotalCount RawCount Scale ScaledCount Error
> 0 500282143 150403975 -2.00 (c8050b5 fffffffff9c224ef) -300807950 160.13%
>
> So the problem is that the TOTAL_TIME_RUNNING value is negative, which as
> far as I know shouldn't be possible.

Correct, that should not happen. I don't have a Fam16 machine, but I can
try and stare at the code a wee bit. Although there's another few perf
issues I am still looking into as well :/


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