linux-kernel - Re: [GIT PULL] Performance Counters for Linux

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Message-ID: <alpine.LFD.2.01.0906110952460.3573@localhost.localdomain>
Date:	Thu, 11 Jun 2009 09:54:41 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Christoph Hellwig <hch@...radead.org>
cc:	Marcel Holtmann <marcel@...tmann.org>, Ingo Molnar <mingo@...e.hu>,
	"David S. Miller" <davem@...emloft.net>,
	Stephane Eranian <eranian@...glemail.com>,
	linux-kernel@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [GIT PULL] Performance Counters for Linux



On Thu, 11 Jun 2009, Christoph Hellwig wrote:
> 
> Did you take a look a tools/perf/?  There is nothing close to hardware
> at all.  It's all pretty highly abstracted away from anything resembling
> the hardware through the perfcounters interface.

The thing is, the raw perfcounters interface isn't going to be useful as 
is. And I have seen where things go when you split them up. So when I get 
the choice, I'll go down the road of unproven failure, in the hope that it 
will be successful, rather than doing the same mistake once more.

   "Insanity: doing the same thing over and over, expecting to get 
    different results."

And I'm not insane.

Anyway, feel free to disagree. I just don't care. 

			Linus
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