linux-kernel - Re: [Patch 0/5] I/O statistics through request queues

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Message-ID: <20061102144603.GN13555@kernel.dk>
Date:	Thu, 2 Nov 2006 15:46:04 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	martin <mp3@...ibm.com>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org
Subject: Re: [Patch 0/5] I/O statistics through request queues

On Thu, Nov 02 2006, martin wrote:
> Jens, Andrew,
> I am not pursueing this patch set. I have convinced myself that blktrace
> is capable of being used as a an analysis tool for low level I/O
> performance, if invoced with appropriate settings. In our tests, we
> limited traces to Issue/Complete events, cut down on relay buffers, and
> redirected traces to a network connection instead of filling locally
> attached storage up. Cost is about 2 percent, as advertised.

Martin, thanks for following up on this and verifying the cost numbers.

-- 
Jens Axboe

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