From: Pavel Machek <pavel@suse.cz>
To: Jens Axboe <axboe@suse.de>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] deadline io scheduler
Date: Mon, 30 Sep 2002 07:45:20 +0000 [thread overview]
Message-ID: <20020930074519.B159@toy.ucw.cz> (raw)
In-Reply-To: <20020925172024.GH15479@suse.de>; from axboe@suse.de on Wed, Sep 25, 2002 at 07:20:24PM +0200
Hi!
> Due to recent "problems" (well the vm being just too damn good at keep
> disks busy these days), it's become even more apparent that our current
> io scheduler just cannot cope with some work loads. Repeated starvartion
> of reads is the most important one. The Andrew Morton Interactive
> Workload (AMIW) [1] rates the current kernel poorly, on my test machine
> it completes in 1-2 minutes depending on your luck. 2.5.38-BK does a lot
> better, but mainly because it's being extremely unfair. This deadline io
> scheduler finishes the AMIW in anywhere from ~0.5 seconds to ~3-4
> seconds, depending on the io load.
would it be possible to make deadlines per-process to introduce ionice?
ionice -n -5 mpg123 foo.mp3
ionice make
? Pavel
--
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
next prev parent reply other threads:[~2002-10-01 22:32 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-25 17:20 [PATCH] deadline io scheduler Jens Axboe
2002-09-26 6:15 ` Andrew Morton
2002-09-26 6:27 ` David S. Miller
2002-09-26 6:44 ` Jens Axboe
2002-09-26 6:59 ` Jens Axboe
2002-09-26 7:06 ` William Lee Irwin III
2002-09-26 7:06 ` David S. Miller
2002-09-26 7:16 ` Jeff Garzik
2002-09-26 7:13 ` David S. Miller
2002-09-26 7:33 ` Jeff Garzik
2002-09-26 7:35 ` David S. Miller
2002-09-26 8:15 ` Michael Clark
2002-09-26 8:18 ` William Lee Irwin III
2002-09-26 17:41 ` Mike Anderson
2002-09-26 18:03 ` Jeff Garzik
2002-09-26 19:21 ` Mike Anderson
2002-09-27 5:41 ` Andrew Vasquez
2002-09-27 5:57 ` Jeff Garzik
2002-09-27 16:58 ` Mike Anderson
2002-09-26 22:41 ` Matt Porter
2002-09-26 22:35 ` Mark Bellon
2002-09-26 20:21 ` Thomas Tonino
2002-09-26 7:41 ` Jeff Garzik
2002-09-26 7:23 ` William Lee Irwin III
2002-09-26 7:11 ` Jeff Garzik
2002-09-26 7:14 ` William Lee Irwin III
2002-09-26 15:54 ` Patrick Mansfield
2002-09-30 8:15 ` Jens Axboe
2002-09-30 15:39 ` Patrick Mansfield
2002-09-30 16:08 ` Jens Axboe
2002-09-26 8:28 ` Daniel Pittman
2002-09-26 8:29 ` Jens Axboe
2002-09-26 23:23 ` Daniel Pittman
2002-09-30 8:10 ` Jens Axboe
2002-09-26 15:09 ` Rik van Riel
2002-09-26 7:12 ` Andrew Morton
2002-09-26 7:17 ` Jens Axboe
2002-09-26 7:34 ` Jens Axboe
2002-09-30 7:45 ` Pavel Machek [this message]
2002-10-02 5:35 ` Jens Axboe
2002-09-27 16:01 Andrew Vasquez
2002-09-27 17:07 ` Mike Anderson
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