linux-ext4 - Re: jbd/jbd2 performance improvements

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Message-ID: <18678.55651.556822.187508@frecb006361.adech.frec.bull.fr>
Date:	Thu, 16 Oct 2008 08:04:19 +0200
From:	Solofo.Ramangalahy@...l.net
To:	Ric Wheeler <rwheeler@...hat.com>
Cc:	"Theodore Ts'o" <tytso@....edu>, linux-ext4@...r.kernel.org,
	Eric Sandeen <sandeen@...hat.com>
Subject: Re: jbd/jbd2 performance improvements

Hi Ric,

>>>>> On Wed, 15 Oct 2008 13:29:55 -0400, Ric Wheeler <rwheeler@...hat.com> said:
    Ric> We are going to try and poke at this - do you suspect a single or 
    Ric> multi-threaded test would work best?

I've performed some tests:
http://www.bullopensource.org/ext4/20081013-2.6.27-rc9-ext4-1-akpm-fix-run6/
http://www.bullopensource.org/ext4/20081013-2.6.27-rc9-ext4-1-akpm-fix-run6/results_sorted.txt.html

I now realize that the results may not be valid since I used kvm, but
they do show variation wrt. the number of threads.

So you may want to test both single and multi-threaded.

-- 
solofo
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