From: Vivek Goyal <vgoyal@redhat.com>
To: Jeff Moyer <jmoyer@redhat.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org,
containers@lists.linux-foundation.org, dm-devel@redhat.com,
jens.axboe@oracle.com, nauman@google.com, dpshah@google.com,
lizf@cn.fujitsu.com, mikew@google.com, fchecconi@gmail.com,
paolo.valente@unimore.it, ryov@valinux.co.jp,
fernando@oss.ntt.co.jp, s-uchida@ap.jp.nec.com,
taka@valinux.co.jp, guijianfeng@cn.fujitsu.com,
dhaval@linux.vnet.ibm.com, righi.andrea@gmail.com,
m-ikeda@ds.jp.nec.com, jbaron@redhat.com, agk@redhat.com,
snitzer@redhat.com, akpm@linux-foundation.org,
peterz@infradead.org
Subject: Re: [RFC] IO scheduler based io controller (V5)
Date: Mon, 22 Jun 2009 12:02:07 -0400 [thread overview]
Message-ID: <20090622160207.GC15600@redhat.com> (raw)
In-Reply-To: <x497hz4l1j9.fsf@segfault.boston.devel.redhat.com>
On Mon, Jun 22, 2009 at 11:40:42AM -0400, Jeff Moyer wrote:
> Vivek Goyal <vgoyal@redhat.com> writes:
>
> > On Sun, Jun 21, 2009 at 08:51:16PM +0530, Balbir Singh wrote:
> >> * Vivek Goyal <vgoyal@redhat.com> [2009-06-19 16:37:18]:
> >>
> >> >
> >> > Hi All,
> >> >
> >> > Here is the V5 of the IO controller patches generated on top of 2.6.30.
> >> [snip]
> >>
> >> > Testing
> >> > =======
> >> >
> >>
> >> [snip]
> >>
> >> I've not been reading through the discussions in complete detail, but
> >> I see no reference to async reads or aio. In the case of aio, aio
> >> presumes the context of the user space process. Could you elaborate on
> >> any testing you've done with these cases?
> >>
> >
> > Hi Balbir,
> >
> > So far I had not done any testing with AIO. I have done some just now.
> > Here are the results.
> >
> > Test1 (AIO reads)
> > ================
> > Set up two fio, AIO read jobs in two cgroup with weight 1000 and 500
> > respectively. I am using cfq scheduler. Following are some lines from my test
> > script.
> >
> > ===================================================================
> > fio_args="--ioengine=libaio --rw=read --size=512M"
>
> AIO doesn't make sense without O_DIRECT.
>
Ok, here are the read results with --direct=1 for reads. In previous posting,
writes were already direct.
test1 statistics: time=8 16 20796 sectors=8 16 1049648
test2 statistics: time=8 16 10551 sectors=8 16 581160
Not sure why reads are so slow with --direct=1? In the previous test
(no direct IO), I had cleared the caches using
(echo 3 > /proc/sys/vm/drop_caches) so reads could not have come from page
cache?
Thanks
Vivek
WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com>
To: Jeff Moyer <jmoyer@redhat.com>
Cc: dhaval@linux.vnet.ibm.com, snitzer@redhat.com,
peterz@infradead.org, dm-devel@redhat.com, dpshah@google.com,
jens.axboe@oracle.com, agk@redhat.com,
Balbir Singh <balbir@linux.vnet.ibm.com>,
paolo.valente@unimore.it, guijianfeng@cn.fujitsu.com,
fernando@oss.ntt.co.jp, mikew@google.com, nauman@google.com,
m-ikeda@ds.jp.nec.com, lizf@cn.fujitsu.com, fchecconi@gmail.com,
akpm@linux-foundation.org, containers@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, s-uchida@ap.jp.nec.com,
righi.andrea@gmail.com, jbaron@redhat.com
Subject: Re: [RFC] IO scheduler based io controller (V5)
Date: Mon, 22 Jun 2009 12:02:07 -0400 [thread overview]
Message-ID: <20090622160207.GC15600@redhat.com> (raw)
In-Reply-To: <x497hz4l1j9.fsf@segfault.boston.devel.redhat.com>
On Mon, Jun 22, 2009 at 11:40:42AM -0400, Jeff Moyer wrote:
> Vivek Goyal <vgoyal@redhat.com> writes:
>
> > On Sun, Jun 21, 2009 at 08:51:16PM +0530, Balbir Singh wrote:
> >> * Vivek Goyal <vgoyal@redhat.com> [2009-06-19 16:37:18]:
> >>
> >> >
> >> > Hi All,
> >> >
> >> > Here is the V5 of the IO controller patches generated on top of 2.6.30.
> >> [snip]
> >>
> >> > Testing
> >> > =======
> >> >
> >>
> >> [snip]
> >>
> >> I've not been reading through the discussions in complete detail, but
> >> I see no reference to async reads or aio. In the case of aio, aio
> >> presumes the context of the user space process. Could you elaborate on
> >> any testing you've done with these cases?
> >>
> >
> > Hi Balbir,
> >
> > So far I had not done any testing with AIO. I have done some just now.
> > Here are the results.
> >
> > Test1 (AIO reads)
> > ================
> > Set up two fio, AIO read jobs in two cgroup with weight 1000 and 500
> > respectively. I am using cfq scheduler. Following are some lines from my test
> > script.
> >
> > ===================================================================
> > fio_args="--ioengine=libaio --rw=read --size=512M"
>
> AIO doesn't make sense without O_DIRECT.
>
Ok, here are the read results with --direct=1 for reads. In previous posting,
writes were already direct.
test1 statistics: time=8 16 20796 sectors=8 16 1049648
test2 statistics: time=8 16 10551 sectors=8 16 581160
Not sure why reads are so slow with --direct=1? In the previous test
(no direct IO), I had cleared the caches using
(echo 3 > /proc/sys/vm/drop_caches) so reads could not have come from page
cache?
Thanks
Vivek
next prev parent reply other threads:[~2009-06-22 16:04 UTC|newest]
Thread overview: 176+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-19 20:37 [RFC] IO scheduler based io controller (V5) Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 01/20] io-controller: Documentation Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 02/20] io-controller: Common flat fair queuing code in elevaotor layer Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-22 8:46 ` Balbir Singh
2009-06-22 8:46 ` Balbir Singh
2009-06-22 12:43 ` Fabio Checconi
[not found] ` <20090622124313.GF28770-f9ZlEuEWxVeACYmtYXMKmw@public.gmane.org>
2009-06-23 2:43 ` Vivek Goyal
2009-06-23 2:43 ` Vivek Goyal
2009-06-23 2:43 ` Vivek Goyal
[not found] ` <20090623024337.GC3620-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-23 4:10 ` Fabio Checconi
2009-06-23 4:10 ` Fabio Checconi
2009-06-23 7:32 ` Balbir Singh
2009-06-23 7:32 ` Balbir Singh
[not found] ` <20090623073252.GJ8642-SINUvgVNF2CyUtPGxGje5AC/G2K4zDHf@public.gmane.org>
2009-06-23 13:42 ` Fabio Checconi
2009-06-23 13:42 ` Fabio Checconi
[not found] ` <20090623041052.GS28770-f9ZlEuEWxVeACYmtYXMKmw@public.gmane.org>
2009-06-23 7:32 ` Balbir Singh
2009-06-23 2:05 ` Vivek Goyal
2009-06-23 2:05 ` Vivek Goyal
[not found] ` <20090623020515.GA3620-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-23 2:20 ` Jeff Moyer
2009-06-23 2:20 ` Jeff Moyer
[not found] ` <20090622084612.GD3728-SINUvgVNF2CyUtPGxGje5AC/G2K4zDHf@public.gmane.org>
2009-06-22 12:43 ` Fabio Checconi
2009-06-23 2:05 ` Vivek Goyal
2009-06-30 6:40 ` Gui Jianfeng
2009-07-01 1:28 ` Vivek Goyal
2009-07-01 1:28 ` Vivek Goyal
[not found] ` <4A49B364.5000508-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-07-01 1:28 ` Vivek Goyal
2009-07-01 9:24 ` Gui Jianfeng
[not found] ` <1245443858-8487-3-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-22 8:46 ` Balbir Singh
2009-06-30 6:40 ` Gui Jianfeng
2009-07-01 9:24 ` Gui Jianfeng
2009-06-19 20:37 ` [PATCH 03/20] io-controller: Charge for time slice based on average disk rate Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 04/20] io-controller: Modify cfq to make use of flat elevator fair queuing Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 05/20] io-controller: Common hierarchical fair queuing code in elevaotor layer Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-29 5:27 ` [PATCH] io-controller: optimization for iog deletion when elevator exiting Gui Jianfeng
[not found] ` <4A4850D3.3000700-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-06-29 14:06 ` Vivek Goyal
2009-06-29 14:06 ` Vivek Goyal
2009-06-29 14:06 ` Vivek Goyal
2009-06-30 17:14 ` Nauman Rafique
2009-06-30 17:14 ` Nauman Rafique
2009-07-01 1:34 ` Vivek Goyal
2009-07-01 1:34 ` Vivek Goyal
[not found] ` <e98e18940906301014n146e7146vb5a73c2f33c9e819-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-07-01 1:34 ` Vivek Goyal
[not found] ` <20090629140631.GA4622-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-30 17:14 ` Nauman Rafique
[not found] ` <1245443858-8487-6-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-29 5:27 ` Gui Jianfeng
2009-06-19 20:37 ` [PATCH 06/20] io-controller: cfq changes to use hierarchical fair queuing code in elevaotor layer Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 07/20] io-controller: Export disk time used and nr sectors dipatched through cgroups Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-23 12:10 ` Gui Jianfeng
2009-06-23 12:10 ` Gui Jianfeng
[not found] ` <4A40C64E.8040305-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-06-23 14:38 ` Vivek Goyal
2009-06-23 14:38 ` Vivek Goyal
2009-06-23 14:38 ` Vivek Goyal
[not found] ` <1245443858-8487-8-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-23 12:10 ` Gui Jianfeng
2009-06-19 20:37 ` [PATCH 08/20] io-controller: idle for sometime on sync queue before expiring it Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-30 7:49 ` [PATCH] io-controller: Don't expire an idle ioq if it's the only ioq in hierarchy Gui Jianfeng
[not found] ` <4A49C381.3040302-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-07-01 1:32 ` Vivek Goyal
2009-07-01 1:32 ` Vivek Goyal
2009-07-01 1:32 ` Vivek Goyal
[not found] ` <20090701013239.GB13958-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-07-01 1:40 ` Gui Jianfeng
2009-07-01 1:40 ` Gui Jianfeng
2009-07-01 1:40 ` Gui Jianfeng
[not found] ` <1245443858-8487-9-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-30 7:49 ` Gui Jianfeng
2009-06-19 20:37 ` [PATCH 09/20] io-controller: Separate out queue and data Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 10/20] io-conroller: Prepare elevator layer for single queue schedulers Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 11/20] io-controller: noop changes for hierarchical fair queuing Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 12/20] io-controller: deadline " Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 13/20] io-controller: anticipatory " Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
[not found] ` <1245443858-8487-1-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-19 20:37 ` [PATCH 01/20] io-controller: Documentation Vivek Goyal
2009-06-19 20:37 ` [PATCH 02/20] io-controller: Common flat fair queuing code in elevaotor layer Vivek Goyal
2009-06-19 20:37 ` [PATCH 03/20] io-controller: Charge for time slice based on average disk rate Vivek Goyal
2009-06-19 20:37 ` [PATCH 04/20] io-controller: Modify cfq to make use of flat elevator fair queuing Vivek Goyal
2009-06-19 20:37 ` [PATCH 05/20] io-controller: Common hierarchical fair queuing code in elevaotor layer Vivek Goyal
2009-06-19 20:37 ` [PATCH 06/20] io-controller: cfq changes to use " Vivek Goyal
2009-06-19 20:37 ` [PATCH 07/20] io-controller: Export disk time used and nr sectors dipatched through cgroups Vivek Goyal
2009-06-19 20:37 ` [PATCH 08/20] io-controller: idle for sometime on sync queue before expiring it Vivek Goyal
2009-06-19 20:37 ` [PATCH 09/20] io-controller: Separate out queue and data Vivek Goyal
2009-06-19 20:37 ` [PATCH 10/20] io-conroller: Prepare elevator layer for single queue schedulers Vivek Goyal
2009-06-19 20:37 ` [PATCH 11/20] io-controller: noop changes for hierarchical fair queuing Vivek Goyal
2009-06-19 20:37 ` [PATCH 12/20] io-controller: deadline " Vivek Goyal
2009-06-19 20:37 ` [PATCH 13/20] io-controller: anticipatory " Vivek Goyal
2009-06-19 20:37 ` [PATCH 14/20] blkio_cgroup patches from Ryo to track async bios Vivek Goyal
2009-06-19 20:37 ` [PATCH 15/20] io-controller: map async requests to appropriate cgroup Vivek Goyal
2009-06-19 20:37 ` [PATCH 16/20] io-controller: Per cgroup request descriptor support Vivek Goyal
2009-06-19 20:37 ` [PATCH 17/20] io-controller: Per io group bdi congestion interface Vivek Goyal
2009-06-19 20:37 ` [PATCH 18/20] io-controller: Support per cgroup per device weights and io class Vivek Goyal
2009-06-19 20:37 ` [PATCH 19/20] io-controller: Debug hierarchical IO scheduling Vivek Goyal
2009-06-19 20:37 ` [PATCH 20/20] io-controller: experimental debug patch for async queue wait before expiry Vivek Goyal
2009-06-21 15:21 ` [RFC] IO scheduler based io controller (V5) Balbir Singh
2009-06-29 16:04 ` Vladislav Bolkhovitin
2009-06-19 20:37 ` [PATCH 14/20] blkio_cgroup patches from Ryo to track async bios Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 15/20] io-controller: map async requests to appropriate cgroup Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
[not found] ` <1245443858-8487-16-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-22 1:45 ` Gui Jianfeng
2009-06-22 1:45 ` Gui Jianfeng
[not found] ` <4A3EE245.7030409-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-06-22 15:39 ` Vivek Goyal
2009-06-22 15:39 ` Vivek Goyal
2009-06-22 15:39 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 16/20] io-controller: Per cgroup request descriptor support Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 17/20] io-controller: Per io group bdi congestion interface Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 18/20] io-controller: Support per cgroup per device weights and io class Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-24 21:52 ` Paul Menage
2009-06-24 21:52 ` Paul Menage
2009-06-25 10:23 ` [PATCH] io-controller: do some changes of io.policy interface Gui Jianfeng
2009-06-25 10:23 ` Gui Jianfeng
[not found] ` <4A435038.60406-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-06-25 12:55 ` Vivek Goyal
2009-06-25 12:55 ` Vivek Goyal
2009-06-25 12:55 ` Vivek Goyal
2009-06-26 0:27 ` Gui Jianfeng
2009-06-26 0:27 ` Gui Jianfeng
[not found] ` <20090625125513.GA25439-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-26 0:27 ` Gui Jianfeng
2009-06-26 0:59 ` Gui Jianfeng
2009-06-26 0:59 ` Gui Jianfeng
[not found] ` <6599ad830906241452t76e64815s7d68a22a6e746a59-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-06-25 10:23 ` Gui Jianfeng
[not found] ` <1245443858-8487-19-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-24 21:52 ` [PATCH 18/20] io-controller: Support per cgroup per device weights and io class Paul Menage
2009-06-19 20:37 ` [PATCH 19/20] io-controller: Debug hierarchical IO scheduling Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
2009-06-19 20:37 ` [PATCH 20/20] io-controller: experimental debug patch for async queue wait before expiry Vivek Goyal
2009-06-19 20:37 ` Vivek Goyal
[not found] ` <1245443858-8487-21-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-22 7:44 ` [PATCH] io-controller: Preempt a non-rt queue if a rt ioq is present in ancestor or sibling groups Gui Jianfeng
2009-06-22 7:44 ` Gui Jianfeng
2009-06-22 17:21 ` Vivek Goyal
2009-06-22 17:21 ` Vivek Goyal
2009-06-23 6:44 ` Gui Jianfeng
2009-06-23 14:02 ` Vivek Goyal
2009-06-23 14:02 ` Vivek Goyal
2009-06-24 9:20 ` Gui Jianfeng
2009-06-26 8:13 ` [PATCH 1/2] io-controller: Prepare a rt ioq list in efqd to keep track of busy rt ioqs Gui Jianfeng
2009-06-26 8:13 ` Gui Jianfeng
[not found] ` <4A41EFE1.5050101-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-06-26 8:13 ` Gui Jianfeng
2009-06-26 8:13 ` [PATCH 2/2] io-controller: make rt preemption happen in the whole hierarchy Gui Jianfeng
2009-06-26 8:13 ` Gui Jianfeng
[not found] ` <4A44833F.8040308-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-06-26 12:39 ` Vivek Goyal
2009-06-26 12:39 ` Vivek Goyal
2009-06-26 12:39 ` Vivek Goyal
[not found] ` <20090623140250.GA4262-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-24 9:20 ` [PATCH] io-controller: Preempt a non-rt queue if a rt ioq is present in ancestor or sibling groups Gui Jianfeng
[not found] ` <4A4079B8.4020402-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-06-23 14:02 ` Vivek Goyal
[not found] ` <20090622172123.GE15600-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-23 6:44 ` Gui Jianfeng
[not found] ` <4A3F3648.7080007-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2009-06-22 17:21 ` Vivek Goyal
2009-06-21 15:21 ` [RFC] IO scheduler based io controller (V5) Balbir Singh
2009-06-22 15:30 ` Vivek Goyal
2009-06-22 15:30 ` Vivek Goyal
2009-06-22 15:40 ` Jeff Moyer
2009-06-22 16:02 ` Vivek Goyal [this message]
2009-06-22 16:02 ` Vivek Goyal
[not found] ` <20090622160207.GC15600-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-22 16:06 ` Jeff Moyer
2009-06-22 16:06 ` Jeff Moyer
[not found] ` <x493a9sl0bx.fsf-RRHT56Q3PSP4kTEheFKJxxDDeQx5vsVwAInAS/Ez/D0@public.gmane.org>
2009-06-22 17:08 ` Vivek Goyal
2009-06-22 17:08 ` Vivek Goyal
2009-06-22 17:08 ` Vivek Goyal
[not found] ` <20090622170812.GD15600-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-23 6:52 ` Balbir Singh
2009-06-23 6:52 ` Balbir Singh
[not found] ` <x497hz4l1j9.fsf-RRHT56Q3PSP4kTEheFKJxxDDeQx5vsVwAInAS/Ez/D0@public.gmane.org>
2009-06-22 16:02 ` Vivek Goyal
[not found] ` <20090622153030.GA15600-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-06-22 15:40 ` Jeff Moyer
[not found] ` <20090621152116.GC3728-SINUvgVNF2CyUtPGxGje5AC/G2K4zDHf@public.gmane.org>
2009-06-22 15:30 ` Vivek Goyal
2009-06-29 16:04 ` Vladislav Bolkhovitin
2009-06-29 17:23 ` Vivek Goyal
2009-06-29 17:23 ` Vivek Goyal
[not found] ` <4A48E601.2050203-d+Crzxg7Rs0@public.gmane.org>
2009-06-29 17:23 ` Vivek Goyal
2009-06-19 20:37 Vivek Goyal
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