From: tytso@mit.edu
To: Jeff Moyer <jmoyer@redhat.com>
Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
jens.axboe@oracle.com, esandeen@redhat.com
Subject: Re: [patch/rft] jbd2: tag journal writes as metadata I/O
Date: Mon, 5 Apr 2010 15:48:03 -0400 [thread overview]
Message-ID: <20100405194803.GC23670@thunk.org> (raw)
In-Reply-To: <x49hbnpkaqw.fsf@segfault.boston.devel.redhat.com>
On Mon, Apr 05, 2010 at 02:36:07PM -0400, Jeff Moyer wrote:
> >
> > What benchmark were you using to test small file writes? This looks
> > good to me as well, but we might want to do some extra benchmarking
> > just to be sure we're not accidentally introducing a performance
> > regression.
>
> iozone showed regressions for write and re-write in runs that include
> fsync timings for small files (<8MB). Here's the command line used for
> testing:
>
> iozone -az -n 4k -g 2048m -y 1k -q 1m -e
iozone is showing performance regressions or performance improvements?
I thought the point of this patch was to improve iozone benchmarks?
- Ted
next prev parent reply other threads:[~2010-04-05 19:48 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-01 19:04 [patch/rft] jbd2: tag journal writes as metadata I/O Jeff Moyer
2010-04-01 19:48 ` Jan Kara
2010-04-05 15:24 ` Jeff Moyer
2010-04-05 17:46 ` tytso
2010-04-06 15:20 ` Jan Kara
2010-04-06 18:25 ` Vivek Goyal
2010-04-06 18:45 ` tytso
2010-04-06 19:04 ` Jeff Moyer
2010-04-02 7:00 ` Jens Axboe
2010-04-05 17:52 ` tytso
2010-04-05 18:36 ` Jeff Moyer
2010-04-05 19:48 ` tytso [this message]
2010-04-05 20:34 ` Jeff Moyer
2010-04-05 20:41 ` Jeff Moyer
2010-04-05 21:01 ` tytso
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