From: Ulrich Lukas <stellplatz-nr.13a@datenparkplatz.de>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org
Subject: Re: IO scheduler based IO controller V10
Date: Fri, 25 Sep 2009 04:20:14 +0200 [thread overview]
Message-ID: <4ABC28DE.7050809@datenparkplatz.de> (raw)
In-Reply-To: <1253820332-10246-1-git-send-email-vgoyal@redhat.com>
Vivek Goyal wrote:
> Notes:
> - With vanilla CFQ, random writers can overwhelm a random reader.
> Bring down its throughput and bump up latencies significantly.
IIRC, with vanilla CFQ, sequential writing can overwhelm random readers,
too.
I'm basing this assumption on the observations I made on both OpenSuse
11.1 and Ubuntu 9.10 alpha6 which I described in my posting on LKML
titled: "Poor desktop responsiveness with background I/O-operations" of
2009-09-20.
(Message ID: 4AB59CBB.8090907@datenparkplatz.de)
Thus, I'm posting this to show that your work is greatly appreciated,
given the rather disappointig status quo of Linux's fairness when it
comes to disk IO time.
I hope that your efforts lead to a change in performance of current
userland applications, the sooner, the better.
Thanks
Ulrich
next prev parent reply other threads:[~2009-09-25 2:20 UTC|newest]
Thread overview: 190+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-24 19:25 IO scheduler based IO controller V10 Vivek Goyal
2009-09-24 19:25 ` [PATCH 01/28] io-controller: Documentation Vivek Goyal
2009-09-24 19:25 ` [PATCH 02/28] io-controller: Core of the elevator fair queuing Vivek Goyal
2009-09-24 19:25 ` [PATCH 03/28] io-controller: Keep a cache of recently expired queues Vivek Goyal
2009-09-24 19:25 ` [PATCH 04/28] io-controller: Common flat fair queuing code in elevaotor layer Vivek Goyal
2009-09-24 19:25 ` [PATCH 05/28] io-controller: Modify cfq to make use of flat elevator fair queuing Vivek Goyal
2009-09-24 19:25 ` [PATCH 06/28] io-controller: Core scheduler changes to support hierarhical scheduling Vivek Goyal
2009-09-24 19:25 ` [PATCH 07/28] io-controller: cgroup related changes for hierarchical group support Vivek Goyal
2009-09-24 19:25 ` [PATCH 08/28] io-controller: Common hierarchical fair queuing code in elevaotor layer Vivek Goyal
2009-09-24 19:25 ` [PATCH 09/28] io-controller: cfq changes to use " Vivek Goyal
2009-09-24 19:25 ` [PATCH 10/28] io-controller: Export disk time used and nr sectors dipatched through cgroups Vivek Goyal
2009-09-24 19:25 ` [PATCH 11/28] io-controller: Debug hierarchical IO scheduling Vivek Goyal
2009-09-24 19:25 ` [PATCH 12/28] io-controller: Introduce group idling Vivek Goyal
2009-09-24 19:25 ` [PATCH 13/28] io-controller: Implement wait busy for io queues Vivek Goyal
2009-09-24 19:25 ` [PATCH 14/28] io-controller: Keep track of late preemptions Vivek Goyal
2009-09-24 19:25 ` [PATCH 15/28] io-controller: Allow CFQ specific extra preemptions Vivek Goyal
2009-09-25 6:24 ` Gui Jianfeng
2009-09-24 19:25 ` [PATCH 16/28] io-controller: Wait for requests to complete from last queue before new queue is scheduled Vivek Goyal
2009-09-24 19:25 ` [PATCH 17/28] io-controller: Separate out queue and data Vivek Goyal
2009-09-24 19:25 ` [PATCH 18/28] io-conroller: Prepare elevator layer for single queue schedulers Vivek Goyal
2009-09-24 19:25 ` [PATCH 19/28] io-controller: Avoid expiring ioq for single ioq scheduler if only root group Vivek Goyal
2009-09-24 19:25 ` [PATCH 20/28] io-controller: noop changes for hierarchical fair queuing Vivek Goyal
2009-09-24 19:25 ` [PATCH 21/28] io-controller: deadline " Vivek Goyal
2009-09-24 19:25 ` [PATCH 22/28] io-controller: anticipatory " Vivek Goyal
2009-09-24 19:25 ` [PATCH 23/28] io-controller: blkio_cgroup patches from Ryo to track async bios Vivek Goyal
2009-09-24 19:25 ` [PATCH 24/28] io-controller: map async requests to appropriate cgroup Vivek Goyal
2009-09-24 19:25 ` [PATCH 25/28] io-controller: Per cgroup request descriptor support Vivek Goyal
2009-09-24 19:25 ` [PATCH 26/28] io-controller: Per io group bdi congestion interface Vivek Goyal
2009-09-24 19:25 ` [PATCH 27/28] io-controller: Support per cgroup per device weights and io class Vivek Goyal
2009-09-24 19:25 ` [PATCH 28/28] io-controller: debug elevator fair queuing support Vivek Goyal
2009-09-24 21:33 ` IO scheduler based IO controller V10 Andrew Morton
2009-09-25 1:09 ` KAMEZAWA Hiroyuki
2009-09-25 1:18 ` KAMEZAWA Hiroyuki
2009-09-25 5:29 ` Balbir Singh
2009-09-25 7:09 ` Ryo Tsuruta
2009-09-25 4:14 ` Vivek Goyal
2009-09-25 5:04 ` Vivek Goyal
2009-09-25 9:07 ` Ryo Tsuruta
2009-09-25 14:33 ` Vivek Goyal
2009-09-28 7:30 ` Ryo Tsuruta
2009-09-25 15:04 ` Rik van Riel
2009-09-28 7:38 ` Ryo Tsuruta
2009-10-08 4:42 ` More performance numbers (Was: Re: IO scheduler based IO controller V10) Vivek Goyal
2009-10-08 8:34 ` Andrea Righi
2009-10-10 19:53 ` Performance numbers with IO throttling patches " Vivek Goyal
2009-10-10 22:27 ` Andrea Righi
2009-10-11 12:32 ` Vivek Goyal
2009-10-12 21:11 ` Vivek Goyal
2009-10-17 15:18 ` Andrea Righi
2009-09-25 2:20 ` Ulrich Lukas [this message]
2009-09-25 20:26 ` IO scheduler based IO controller V10 Vivek Goyal
2009-09-26 14:51 ` Mike Galbraith
2009-09-27 6:55 ` Mike Galbraith
2009-09-27 16:42 ` Jens Axboe
2009-09-27 18:15 ` Mike Galbraith
2009-09-28 4:04 ` Mike Galbraith
2009-09-28 5:55 ` Mike Galbraith
2009-09-28 17:48 ` Vivek Goyal
2009-09-28 18:24 ` Mike Galbraith
2009-09-30 19:58 ` Mike Galbraith
2009-09-30 20:05 ` Mike Galbraith
2009-09-30 20:24 ` Vivek Goyal
2009-10-01 7:33 ` Mike Galbraith
2009-10-01 18:58 ` Jens Axboe
2009-10-02 6:23 ` Mike Galbraith
2009-10-02 8:04 ` Jens Axboe
2009-10-02 8:53 ` Mike Galbraith
2009-10-02 9:00 ` Mike Galbraith
2009-10-02 9:55 ` Jens Axboe
2009-10-02 12:22 ` Mike Galbraith
2009-10-02 9:24 ` Ingo Molnar
2009-10-02 9:28 ` Jens Axboe
2009-10-02 14:24 ` Linus Torvalds
2009-10-02 14:45 ` Mike Galbraith
2009-10-02 14:57 ` Jens Axboe
2009-10-02 14:56 ` Jens Axboe
2009-10-02 15:14 ` Linus Torvalds
2009-10-02 16:01 ` jim owens
2009-10-02 17:11 ` Jens Axboe
2009-10-02 17:20 ` Ingo Molnar
2009-10-02 17:25 ` Jens Axboe
2009-10-02 17:28 ` Ingo Molnar
2009-10-02 17:37 ` Jens Axboe
2009-10-02 17:56 ` Ingo Molnar
2009-10-02 18:04 ` Jens Axboe
2009-10-02 18:22 ` Mike Galbraith
2009-10-02 18:26 ` Jens Axboe
2009-10-02 18:33 ` Mike Galbraith
2009-10-02 18:36 ` Theodore Tso
2009-10-02 18:45 ` Jens Axboe
2009-10-02 19:01 ` Ingo Molnar
2009-10-02 19:09 ` Jens Axboe
2009-10-02 18:13 ` Mike Galbraith
2009-10-02 18:19 ` Jens Axboe
2009-10-02 18:57 ` Mike Galbraith
2009-10-02 20:47 ` Mike Galbraith
2009-10-03 5:48 ` Mike Galbraith
2009-10-03 5:56 ` Mike Galbraith
2009-10-03 6:31 ` tweaking IO latency [was Re: IO scheduler based IO controller V10] Mike Galbraith
2009-10-03 7:24 ` IO scheduler based IO controller V10 Jens Axboe
2009-10-03 9:00 ` Mike Galbraith
2009-10-03 9:12 ` Corrado Zoccolo
2009-10-03 13:18 ` Jens Axboe
2009-10-03 13:17 ` Jens Axboe
2009-10-03 11:29 ` Vivek Goyal
2009-10-03 12:40 ` Do not overload dispatch queue (Was: Re: IO scheduler based IO controller V10) Vivek Goyal
2009-10-03 13:21 ` Jens Axboe
2009-10-03 13:56 ` Vivek Goyal
2009-10-03 14:02 ` Mike Galbraith
2009-10-03 14:28 ` Jens Axboe
2009-10-03 14:33 ` Mike Galbraith
2009-10-03 14:51 ` Mike Galbraith
2009-10-03 15:14 ` Jens Axboe
2009-10-03 15:57 ` Mike Galbraith
2009-10-03 17:35 ` Jens Axboe
2009-10-03 17:45 ` Linus Torvalds
2009-10-03 17:51 ` Jens Axboe
2009-10-03 19:07 ` Mike Galbraith
2009-10-03 19:11 ` Mike Galbraith
2009-10-03 19:23 ` Jens Axboe
2009-10-03 19:49 ` Mike Galbraith
2009-10-04 10:50 ` Mike Galbraith
2009-10-04 11:33 ` Mike Galbraith
2009-10-04 17:39 ` Jens Axboe
2009-10-04 18:23 ` Mike Galbraith
2009-10-04 18:38 ` Jens Axboe
2009-10-04 19:47 ` Mike Galbraith
2009-10-04 20:17 ` Jens Axboe
2009-10-04 22:15 ` Mike Galbraith
2009-10-03 13:57 ` Mike Galbraith
2009-10-03 7:20 ` IO scheduler based IO controller V10 Ingo Molnar
2009-10-03 7:25 ` Jens Axboe
2009-10-03 8:53 ` Mike Galbraith
2009-10-03 9:01 ` Corrado Zoccolo
2009-10-02 16:33 ` Ray Lee
2009-10-02 17:13 ` Jens Axboe
2009-10-02 16:22 ` Ingo Molnar
2009-10-02 9:36 ` Mike Galbraith
2009-10-02 16:37 ` Ingo Molnar
2009-10-02 18:08 ` Jens Axboe
2009-10-02 18:29 ` Mike Galbraith
2009-10-02 18:36 ` Jens Axboe
2009-09-27 17:00 ` Corrado Zoccolo
2009-09-28 14:56 ` Vivek Goyal
2009-09-28 15:35 ` Corrado Zoccolo
2009-09-28 17:14 ` Vivek Goyal
2009-09-29 7:10 ` Corrado Zoccolo
2009-09-28 17:51 ` Mike Galbraith
2009-09-28 18:18 ` Vivek Goyal
2009-09-28 18:53 ` Mike Galbraith
2009-09-29 7:14 ` Corrado Zoccolo
2009-09-29 5:55 ` Mike Galbraith
2009-09-29 0:37 ` Nauman Rafique
2009-09-29 3:22 ` Vivek Goyal
2009-09-29 9:56 ` Ryo Tsuruta
2009-09-29 10:49 ` Takuya Yoshikawa
2009-09-29 14:10 ` Vivek Goyal
2009-09-29 19:53 ` Nauman Rafique
2009-09-30 8:43 ` Ryo Tsuruta
2009-09-30 11:05 ` Vivek Goyal
2009-10-01 6:41 ` Ryo Tsuruta
2009-10-01 13:31 ` Vivek Goyal
2009-10-02 2:57 ` Vivek Goyal
2009-10-02 20:27 ` Munehiro Ikeda
2009-10-05 10:38 ` Ryo Tsuruta
2009-10-05 12:31 ` Vivek Goyal
2009-10-05 14:55 ` Ryo Tsuruta
2009-10-05 17:10 ` Vivek Goyal
2009-10-05 18:11 ` Nauman Rafique
2009-10-06 7:17 ` Ryo Tsuruta
2009-10-06 11:22 ` Vivek Goyal
2009-10-07 14:38 ` Ryo Tsuruta
2009-10-07 15:09 ` Vivek Goyal
2009-10-08 2:18 ` Ryo Tsuruta
2009-10-07 16:41 ` Rik van Riel
2009-10-08 10:22 ` Ryo Tsuruta
2009-09-30 3:11 ` Vivek Goyal
-- strict thread matches above, loose matches on Subject: below --
2009-10-02 10:55 Corrado Zoccolo
2009-10-02 11:04 ` Jens Axboe
2009-10-02 12:49 ` Vivek Goyal
2009-10-02 15:27 ` Corrado Zoccolo
2009-10-02 15:31 ` Vivek Goyal
2009-10-02 15:32 ` Mike Galbraith
2009-10-02 15:40 ` Vivek Goyal
2009-10-02 16:03 ` Mike Galbraith
2009-10-02 16:50 ` Valdis.Kletnieks
2009-10-02 19:58 ` Vivek Goyal
2009-10-02 22:14 ` Corrado Zoccolo
2009-10-02 22:27 ` Vivek Goyal
2009-10-03 12:43 ` Corrado Zoccolo
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