linux-kernel - Re: [PATCH] perf, x86: catch spurious interrupts after disabling counters

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Date:	Thu, 16 Sep 2010 00:39:48 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Robert Richter <robert.richter@....com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Don Zickus <dzickus@...hat.com>,
	"fweisbec@...il.com" <fweisbec@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"ying.huang@...el.com" <ying.huang@...el.com>,
	"ming.m.lin@...el.com" <ming.m.lin@...el.com>,
	"yinghai@...nel.org" <yinghai@...nel.org>,
	"andi@...stfloor.org" <andi@...stfloor.org>
Subject: Re: [PATCH] perf, x86: catch spurious interrupts after disabling
	counters

On Wed, Sep 15, 2010 at 10:21:10PM +0200, Stephane Eranian wrote:
> When you do perf record foo, it's equivalent to
> perf record -e cycles:uk -F 1000 foo
>

yup, thanks
 
> I think there is a problem with perf record in case you provide
> multiple events. It is going to sample on all of them at the same
> frequency. You may not always want that, but I don't think there
> is a way to change that.
> 

indeed, without perf-tool code changes but i think you still may run
multiple instances of perf-tool :)

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