From: Peter Zijlstra <peterz@infradead.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org,
Andi Kleen <ak@linux.intel.com>,
eranian@google.com
Subject: Re: [PATCH] perf, x86: Enable PEBS mode automatically for mem-{loads,stores} v3
Date: Tue, 23 Jul 2013 10:38:34 +0200 [thread overview]
Message-ID: <20130723083834.GS27075@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1374188619-19220-1-git-send-email-andi@firstfloor.org>
On Thu, Jul 18, 2013 at 04:03:39PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> [The patch to enable this in the user tools has been sent separately]
>
> With the earlier patches to automatically try cpu// and add
> a precise sys attribute, we can now enable PEBS for the mem-loads,
> mem-stores events everywhere.
>
> This allows to use
>
> perf record -e mem-loads ...
>
> instead of
>
> perf record -e cpu/mem-loads/p ...
>
> Always use precise=2 even though it is costly pre-Haswell
This Changelog fails to give a reason _why_ we'd want to do this.
next prev parent reply other threads:[~2013-07-23 8:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-18 23:03 [PATCH] perf, x86: Enable PEBS mode automatically for mem-{loads,stores} v3 Andi Kleen
2013-07-19 7:46 ` Ingo Molnar
2013-07-23 8:38 ` Peter Zijlstra [this message]
2013-07-23 16:13 ` Andi Kleen
2013-07-23 16:57 ` Peter Zijlstra
2013-07-23 17:46 ` Stephane Eranian
2013-07-23 19:14 ` Andi Kleen
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