linux-kernel - Re: [PATCH 1/1] perf tools: Add missing user space support for config1/config2

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Message-ID: <20110429022819.GA6750@alboin.amr.corp.intel.com>
Date:	Thu, 28 Apr 2011 19:28:19 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Vince Weaver <vweaver1@...s.utk.edu>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...il.com>,
	Lin Ming <ming.m.lin@...el.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 1/1] perf tools: Add missing user space support for
 config1/config2

> I know it is fun to reinvent the wheel, but you ignored decades of 
> experience in dealing with perf-counters when you ran off and invented 
> perf_events.  It will bite you eventually.

s/eventually//

A good example for that is  perf events counted completely bogus LLC 
generalized cache events for several releases (before the offcore patches 
went in).

And BTW they now completely changed again with Peter's changed, counting
something quite different.

-Andi
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