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Subject: Re: [PATCH v2 6/6] perf tool: Parse general/raw events from sysfs
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Lin Ming <ming.m.lin@intel.com>
Cc: Stephane Eranian <eranian@google.com>, Ingo Molnar <mingo@elte.hu>,
        Andi Kleen <andi@firstfloor.org>,
        Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
        linux-kernel <linux-kernel@vger.kernel.org>
Date: Mon, 08 Aug 2011 10:48:18 +0200
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On Mon, 2011-08-08 at 09:08 +0800, Lin Ming wrote:
> 
> We only need to register one pmu with two same graphics cards.
> Then we can overload pid argument of sys_perf_event_open() to
> differentiate each instance of graphic card.
> 
> Just like perf cgroup does. 

I don't like that much at all.. For one it will make it impossible to
put the pmu device in the right sysfs topology.