From: David Chinner <dgc@sgi.com>
To: Szabolcs Illes <S.Illes@westminster.ac.uk>
Cc: xfs@oss.sgi.com
Subject: Re: After reboot fs with barrier faster deletes then fs with nobarrier
Date: Mon, 2 Jul 2007 23:01:50 +1000 [thread overview]
Message-ID: <20070702130150.GK989688@sgi.com> (raw)
In-Reply-To: <op.tuomcyagf7nho5@project1.cpc.wmin.ac.uk>
On Fri, Jun 29, 2007 at 01:01:36PM +0100, Szabolcs Illes wrote:
> on my desktop pc:
>
> WCE=1
hot-cache/cold cache nobarrier is faster. same results as I got.
After reboot, nobarrier is way slow.
> WCE=0
hot-cache/cold-cache is pretty much identical. Same results I got.
After reboot, nobarrier is way slow.
> for cold cache I used: echo 3 > /proc/sys/vm/drop_caches
Same here.
> it looks like this machine is only affected after reboot, maybe the hdd
> has more cache, then the hdd in my 3 years old laptop.
> on my laptop it was enought to clear the kernel cache.
>
> How did you do your "cold" tests? reboot or drop_caches?
drop_caches.
So there definitely appears to be something about a reboot that is
causing an issue here. I'll see if I can reproduce it here.
Cheers,
Dave.
--
Dave Chinner
Principal Engineer
SGI Australian Software Group
prev parent reply other threads:[~2007-07-02 13:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-27 17:58 After reboot fs with barrier faster deletes then fs with nobarrier Szabolcs Illes
2007-06-27 21:45 ` Chris Wedgwood
2007-06-27 22:18 ` Szabolcs Illes
2007-06-27 22:20 ` David Chinner
2007-06-28 5:00 ` Timothy Shimmin
2007-06-28 14:22 ` Szabolcs Illes
2007-06-28 22:02 ` David Chinner
2007-06-29 7:03 ` Timothy Shimmin
2007-06-29 0:16 ` David Chinner
2007-06-29 12:01 ` Szabolcs Illes
2007-07-02 13:01 ` David Chinner [this message]
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