From: Mike Galbraith <efault@gmx.de>
To: Tong Li <tong.n.li@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>, dimm <dmitry.adamushko@gmail.com>,
linux-kernel@vger.kernel.org,
Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [git] CFS-devel, group scheduler, fixes
Date: Sat, 22 Sep 2007 12:01:48 +0200 [thread overview]
Message-ID: <1190455308.7404.19.camel@Homer.simpson.net> (raw)
In-Reply-To: <Pine.LNX.4.64.0709212018480.16240@tongli.jf.intel.com>
On Fri, 2007-09-21 at 20:27 -0700, Tong Li wrote:
> Mike,
>
> Could you try this patch to see if it solves the latency problem?
No, but it helps some when running two un-pinned busy loops, one at nice
0, and the other at nice 19. Yesterday I hit latencies of up to 1.2
_seconds_ doing this, and logging sched_debug and /proc/`pidof
Xorg`/sched from SCHED_RR shells.
se.wait_max : 164.242748
se.wait_max : 121.996128
se.wait_max : 194.464773
se.wait_max : 517.425411
se.wait_max : 131.453214
se.wait_max : 122.984190
se.wait_max : 111.729274
se.wait_max : 119.567580
se.wait_max : 126.980696
se.wait_max : 177.241452
se.wait_max : 129.604329
se.wait_max : 119.631657
It doesn't help at all with this oddity while running same:
root@Homer: now is
the time
foooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooor aall good men to come to the aid of their country
That was a nice 0 shell window. I'm not a great typist, but I ain't
_that_ bad :)
-Mike
next prev parent reply other threads:[~2007-09-22 10:02 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-18 19:36 dimm
2007-09-18 20:16 ` Ingo Molnar
2007-09-19 6:03 ` Tong Li
2007-09-19 6:28 ` Mike Galbraith
2007-09-19 7:51 ` Mike Galbraith
2007-09-19 8:42 ` Mike Galbraith
2007-09-19 17:06 ` Tong Li
2007-09-20 4:55 ` Mike Galbraith
2007-09-20 7:15 ` Mike Galbraith
2007-09-20 7:51 ` Ingo Molnar
2007-09-20 8:11 ` Mike Galbraith
2007-09-22 3:27 ` Tong Li
2007-09-22 10:01 ` Mike Galbraith [this message]
2007-09-23 7:14 ` Mike Galbraith
2007-09-23 11:37 ` Mike Galbraith
[not found] ` <20070923115847.GA13061@elte.hu>
2007-09-23 15:53 ` [git] CFS-devel, updates Mike Galbraith
2007-09-24 6:21 ` [git] CFS-devel, group scheduler, fixes Tong Li
2007-09-24 10:10 ` Mike Galbraith
2007-09-24 10:24 ` Peter Zijlstra
2007-09-24 10:42 ` Mike Galbraith
2007-09-24 11:08 ` Peter Zijlstra
2007-09-24 11:43 ` Mike Galbraith
2007-09-24 11:22 ` Mike Galbraith
2007-09-24 11:51 ` Peter Zijlstra
2007-09-24 16:43 ` Tong Li
2007-09-20 19:48 ` Willy Tarreau
2007-09-21 2:40 ` Mike Galbraith
2007-09-21 3:11 ` Willy Tarreau
2007-09-19 19:35 ` Siddha, Suresh B
2007-09-19 20:58 ` Tong Li
2007-09-18 20:22 ` Ingo Molnar
2007-09-19 3:55 ` Srivatsa Vaddagiri
-- strict thread matches above, loose matches on Subject: below --
2007-09-18 19:56 Dmitry Adamushko
2007-09-18 20:18 ` Ingo Molnar
2007-09-18 19:46 Dmitry Adamushko
2007-09-18 20:17 ` Ingo Molnar
2007-09-15 13:06 Ingo Molnar
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