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

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Message-Id: <1162478356.6902.144.camel@dix>
Date:	Thu, 02 Nov 2006 15:39:16 +0100
From:	martin <mp3@...ibm.com>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org
Subject: Re: [Patch 0/5] I/O statistics through request queues

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.

Thanks,
Martin

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