linux-kernel - Re: [tip:perf/core] perf/x86: Use INST_RETIRED.PREC

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Date:	Tue, 8 Dec 2015 09:50:26 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	vincent.weaver@...ne.edu, jolsa@...hat.com,
	torvalds@...ux-foundation.org, eranian@...gle.com,
	tglx@...utronix.de, acme@...hat.com, ak@...ux.intel.com,
	linux-kernel@...r.kernel.org, hpa@...or.com,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perf/core] perf/x86: Use INST_RETIRED.PREC_DIST for cycles:
 ppp

On Tue, Dec 08, 2015 at 06:36:04AM +0100, Ingo Molnar wrote:

> So I checked my NHM box with your latest queue and it now works correctly. Do you 
> have any idea what the difference is/was?

Sadly, no clue :/

I went over those patches and cannot find anything that should affect
NHM (or <=SNB in fact).
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