linux-kernel - Re: [PATCH 2/2] perf/x86: fix constraints for load latency and precise events

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Message-ID: <20140619205624.GZ8178@tassilo.jf.intel.com>
Date:	Thu, 19 Jun 2014 13:56:24 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	jmario@...hat.com, dzickus@...hat.com, jolsa@...hat.com,
	acme@...hat.com
Subject: Re: [PATCH 2/2] perf/x86: fix constraints for load latency and
 precise events

On Thu, Jun 19, 2014 at 05:58:29PM +0200, Stephane Eranian wrote:
> The load latency does not have to be constrained to counter 3
> on any of SNB, IVB, HSW. It operates fine on any PEBS-capable
> counter.
> 
> The precise store event for SNB, IVB needs to be on counter 3.
> But on Haswell, precise store is implemented differently and
> the constraint is not needed anymore, so we remove it.

Looks good to me.

-Andi
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