Re: [PATCH] perf, x86: Make cycles:p working on SNB

[Stephane Eranian]

On Thu, May 24, 2012 at 9:57 AM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> On Thu, 2012-05-24 at 09:52 +0200, Peter Zijlstra wrote:
>>
>> OK, so how about I queue the below and if the u-code updates gets
>> released before this hits Linus' tree we'll make it all go away ;-)
>>
> Also, I suspect the u-code update might make INST_RETIRED.ANY_P
> available on SNB again voiding the need to use a different encoding. But
> we'll cross that bridge when we'll get to it.

The PREC_DIST is by design, it is not a work-around of any sort.
It is an attempt at getting a better distribution of samples when sampling
with inst_retired.
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