linux-kernel - Re: [PATCH] perf events: Add stalled cycles generic event

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Message-ID: <BANLkTinA_PN_8nGDz_4SJcVZbagPndca+Q@mail.gmail.com>
Date:	Wed, 27 Apr 2011 12:05:24 -0700
From:	Arun Sharma <arun@...rma-home.net>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Arun Sharma <asharma@...com>,
	Stephane Eranian <eranian@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Lin Ming <ming.m.lin@...el.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, eranian@...il.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] perf events: Add stalled cycles generic event - PERF_COUNT_HW_STALLED_CYCLES

On Wed, Apr 27, 2011 at 9:27 AM, Ingo Molnar <mingo@...e.hu> wrote:

>
> That way we get a 'hidden overhead' profile: a profile of frequently executed
> code which executes in the CPU in a suboptimal way.
>
> So we should probably offer both events.
>

Yes - certainly.

 -Arun
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