From: Peter Zijlstra <peterz@infradead.org>
To: Lin Ming <ming.m.lin@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>,
Matt Fleming <matt@console-pimps.org>,
"Zhang, Rui" <rui.zhang@intel.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
lkml <linux-kernel@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [RFC PATCH 2/2] perf stat: Use event group to simulate PMI on PMI-less hardware counter
Date: Wed, 10 Nov 2010 16:08:43 +0100 [thread overview]
Message-ID: <1289401723.2084.0.camel@laptop> (raw)
In-Reply-To: <1289401597.2479.48.camel@localhost>
On Wed, 2010-11-10 at 23:06 +0800, Lin Ming wrote:
> > The proposed idea was to group with a software hrtimer-based event
> > and use the hrtimer's sample to read the hardware group sibling using
> > PERF_SAMPLE_READ.
>
> So this is usefull in perf top/record on PMI-less counter?
Correct, Matt was implementing this.
next prev parent reply other threads:[~2010-11-10 15:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-10 6:15 [RFC PATCH 2/2] perf stat: Use event group to simulate PMI on PMI-less hardware counter Lin Ming
2010-11-10 12:21 ` Peter Zijlstra
2010-11-10 14:45 ` Lin Ming
2010-11-10 14:53 ` Peter Zijlstra
2010-11-10 15:06 ` Lin Ming
2010-11-10 15:08 ` Peter Zijlstra [this message]
2010-11-10 15:17 ` Matt Fleming
2010-11-11 2:00 ` Zhang Rui
2010-11-11 12:46 ` Peter Zijlstra
2010-11-12 0:32 ` Zhang Rui
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