Re: [PATCH 0/9] perf/x86: implement HT counter corruption workaround

From: Stephane Eranian
Date: Thu Jun 05 2014 - 08:45:48 EST

On Thu, Jun 5, 2014 at 12:28 AM, Andi Kleen <ak@xxxxxxxxxxxxxxx> wrote:
>> There is no HW or FW workaround for this problem.
> Actually there is for global measurements:
> measure with Any bit set and divide by two.
> Please add a check that the any bit is set, and disable
> the workaround for that case.
I think this assume same event is measured on sibling counters at any time.
Otherwise, how does that eliminate the corruption?
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