linux-kernel - Re: [perf] howto switch from pfmon

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Date:	Tue, 23 Jun 2009 14:12:17 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Brice Goglin <Brice.Goglin@...ia.fr>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, paulus@...ba.org,
	mingo@...e.hu, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [perf] howto switch from pfmon

Brice Goglin <Brice.Goglin@...ia.fr> writes:

> Hello,
>
> I am trying to play with perfcounters in current git (actually in latest
> mmotm). I'd like to reproduce what I previously did with pfmon, but I
> couldn't so far.
>
> Something like
>     pfmon --follow-exec 'foobar' -e
> CPU_TO_DRAM_REQUESTS_TO_TARGET_NODE:LOCAL_TO_0,CPU_TO_DRAM_REQUESTS_TO_TARGET_NODE:LOCAL_TO_1
> -- <shell script>
> gives the number of memory accesses to dram node #0 and #1 for all
> processes whose name matches 'foobar'.

My understanding based on recent emails on the topic is that the
perfctr gods decreed you are not to do any of this because they cannot
think of a use case for it, therefore none exist.

-Andi



-- 
ak@...ux.intel.com -- Speaking for myself only.
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