From: Phillip Susi <psusi@cfl.rr.com>
To: Thomas Guyot-Sionnest <dermoth@aei.ca>
Cc: linux-kernel@vger.kernel.org
Subject: Re: CFQ Idle class slowing down everything?
Date: Tue, 28 Oct 2008 14:07:45 -0400 [thread overview]
Message-ID: <490754F1.1080607@cfl.rr.com> (raw)
In-Reply-To: <490226C9.4000406@aei.ca>
Thomas Guyot-Sionnest wrote:
> On 14/10/08 03:18 PM, Andrew Morton wrote:
>>> When "idle", the slave do mostly random writes: about 15 rtps and 200
>>> wtps. For testing I ended up running dd to read files from disk to
>>> /dev/null while avoiding the system cache (had 42GB of data to read
Just thought I would point out that dd is, in fact, dirtying the buffer
cache since you don't pass flag=direct.
next prev parent reply other threads:[~2008-10-28 18:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-09 22:34 CFQ Idle class slowing down everything? Thomas Guyot-Sionnest
2008-10-14 19:18 ` Andrew Morton
2008-10-24 19:49 ` Thomas Guyot-Sionnest
2008-10-28 18:07 ` Phillip Susi [this message]
2008-10-29 10:00 ` Thomas Guyot-Sionnest
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