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Re: [patch] CFS scheduler, -v18

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From: Ingo Molnar <mingo@...>
To: Willy Tarreau <w@...>
Cc: <linux-kernel@...>, Linus Torvalds <torvalds@...>, Andrew Morton <akpm@...>, Mike Galbraith <efault@...>, Arjan van de Ven <arjan@...>, Thomas Gleixner <tglx@...>, Dmitry Adamushko <dmitry.adamushko@...>, Srivatsa Vaddagiri <vatsa@...>
Subject: Re: [patch] CFS scheduler, -v18
Date: Sunday, July 1, 2007 - 4:31 am

* Willy Tarreau <w@1wt.eu> wrote:


hm, i tried your test-app and it causes no problems here. (which is not 
a surprise - your app starts a nice +19 busy loop, which is one of the 
common tests i do here too.)

To further debug this, could you try to create a 'high priority shell' 
on a text console (i.e. not under X) that is SCHED_FIFO prio 98? 
Something like:

  chrt -f -p 98 $$

should do the trick. And then run this script:

  http://people.redhat.com/mingo/cfs-scheduler/tools/cfs-debug-info.sh

before the test, during the test and after the test, from the high-prio 
shell session. (the shell runs at SCHED_FIFO, so the expectation would 
be for that it will be able to run during the test too) Then please send 
me the resulting 3 debug files. Thanks,

	Ingo
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Messages in current thread:
[patch] CFS scheduler, -v18, Ingo Molnar, (Fri Jun 22, 6:02 pm)
Re: [patch] CFS scheduler, -v18, Vegard Nossum, (Mon Jul 2, 7:44 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Tue Jul 3, 3:15 am)
Re: [patch] CFS scheduler, -v18, Vegard Nossum, (Tue Jul 3, 5:11 am)
Re: [patch] CFS scheduler, -v18, Bill Davidsen, (Mon Jul 2, 10:13 am)
Re: [patch] CFS scheduler, -v18, Dmitry Adamushko, (Mon Jul 2, 9:01 am)
Re: [patch] CFS scheduler, -v18, Vegard Nossum, (Mon Jul 2, 9:43 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Mon Jul 2, 11:50 am)
Re: [patch] CFS scheduler, -v18, Vegard Nossum, (Mon Jul 2, 12:40 pm)
Re: [patch] CFS scheduler, -v18, Mike Galbraith, (Tue Jul 3, 3:12 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Tue Jul 3, 3:22 am)
Re: [patch] CFS scheduler, -v18, Andi Kleen, (Wed Jul 4, 8:11 am)
Re: [patch] CFS scheduler, -v18, Keith Packard, (Tue Jul 3, 4:08 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Tue Jul 3, 4:31 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Mon Jul 2, 2:13 pm)
Re: [patch] CFS scheduler, -v18, Vegard Nossum, (Tue Jul 3, 3:01 am)
Re: [patch] CFS scheduler, -v18, Willy Tarreau, (Sat Jun 30, 5:06 pm)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Sun Jul 1, 4:31 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Sun Jul 1, 4:45 am)
Re: [patch] CFS scheduler, -v18, Willy Tarreau, (Sun Jul 1, 5:00 am)
RE: [patch] CFS scheduler, -v18, Fortier,Vincent [Montreal]..., (Tue Jun 26, 4:17 pm)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Wed Jun 27, 6:51 am)
Re: [patch] CFS scheduler, -v18, Willy Tarreau, (Sat Jun 23, 9:24 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Sun Jun 24, 11:52 am)
Re: [patch] CFS scheduler, -v18, Willy Tarreau, (Sun Jun 24, 1:08 pm)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Sun Jun 24, 4:31 pm)
Re: [patch] CFS scheduler, -v18, Antonino Ingargiola, (Sat Jun 23, 6:22 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Sat Jun 23, 1:25 pm)
Re: [patch] CFS scheduler, -v18, Antonino Ingargiola, (Sun Jun 24, 6:02 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Sun Jun 24, 7:07 am)
Re: [patch] CFS scheduler, -v18, Antonino Ingargiola, (Mon Jun 25, 3:27 am)
Re: [patch] CFS scheduler, -v18, Gene Heskett, (Fri Jun 22, 7:08 pm)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Sat Jun 23, 3:11 am)
Re: [patch] CFS scheduler, -v18, Gene Heskett, (Sat Jun 23, 5:55 am)
Re: [patch] CFS scheduler, -v18, S.Çağlar, (Fri Jun 22, 6:09 pm)
Re: [patch] CFS scheduler, -v18, S.Çağlar, (Fri Jun 22, 6:16 pm)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Fri Jun 22, 6:20 pm)
Re: [patch] CFS scheduler, -v18, Andrew Morton, (Mon Jun 25, 11:02 pm)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Tue Jun 26, 4:38 am)
Re: [patch] CFS scheduler, -v18, Andrew Morton, (Tue Jun 26, 5:00 am)
Re: [patch] CFS scheduler, -v18, Ingo Molnar, (Tue Jun 26, 5:38 am)