linux-kernel - Re: [PATCH V6 0/13] perf: Intel uncore pmu counting support

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Message-ID: <4FE28823.80704@intel.com>
Date:	Thu, 21 Jun 2012 10:34:11 +0800
From:	"Yan, Zheng" <zheng.z.yan@...el.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	mingo@...e.hu, jolsa@...hat.com, eranian@...gle.com,
	andi@...stfloor.org, linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...radead.org>
Subject: Re: [PATCH V6 0/13] perf: Intel uncore pmu counting support

On 06/21/2012 12:01 AM, Peter Zijlstra wrote:
> 
> ok, so with this stuff something like:
> 
>   perf stat -ae uncore/event=clockticks/ foo
> 
> will register a counter per cpu, which is somewhat silly since we only
> need one per node. What would be the best way to 'fix' this?
> 
> We could of course create another variant of -a which iterates nodes
> instead of cpus, -N or so.
> 
> Alternatively we could try and describe this in sysfs in some way, one
> possibility would be to include a link to /sys/devices/system/{cpu,node}
> or somesuch and use that link to iterate the correct space.
> 
> Any other suggestions?
> 
How about treat the 'cpu' parameter for uncore event as socket id instead
of cpu id?

Regards
Yan, Zheng


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