From: Ric Wheeler <rwheeler@redhat.com>
To: Solofo.Ramangalahy@bull.net
Cc: "Theodore Ts'o" <tytso@mit.edu>,
linux-ext4@vger.kernel.org, Eric Sandeen <sandeen@redhat.com>
Subject: Re: jbd/jbd2 performance improvements
Date: Thu, 16 Oct 2008 08:06:55 -0400 [thread overview]
Message-ID: <48F72E5F.2050409@redhat.com> (raw)
In-Reply-To: <18678.55651.556822.187508@frecb006361.adech.frec.bull.fr>
Solofo.Ramangalahy@bull.net wrote:
> Hi Ric,
>
>
>>>>>> On Wed, 15 Oct 2008 13:29:55 -0400, Ric Wheeler <rwheeler@redhat.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.
>
>
A very thorough test, but the results don't seem to point to a
consistent winner.
I agree that running without KVM in the picture might be very
interesting. Eric has some similar tests underway, I think that his
results were also inconclusive so far...
Ric
next prev parent reply other threads:[~2008-10-16 12:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-07 13:14 jbd/jbd2 performance improvements Theodore Ts'o
2008-10-15 17:29 ` Ric Wheeler
2008-10-16 6:04 ` Solofo.Ramangalahy
2008-10-16 12:06 ` Ric Wheeler [this message]
2008-10-16 12:39 ` Eric Sandeen
2008-10-23 10:42 ` Solofo.Ramangalahy
2008-10-23 12:00 ` Ric Wheeler
2008-10-23 12:22 ` Solofo.Ramangalahy
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