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Re: [patch] CFS scheduler, -v19

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From: Bill Davidsen <davidsen@...>
To: <linux-kernel@...>
Cc: Ingo Molnar <mingo@...>, <linux-kernel@...>, Linus Torvalds <torvalds@...>, Andrew Morton <akpm@...>, Arjan van de Ven <arjan@...>, Thomas Gleixner <tglx@...>, Dmitry Adamushko <dmitry.adamushko@...>, Srivatsa Vaddagiri <vatsa@...>
Subject: Re: [patch] CFS scheduler, -v19
Date: Wednesday, July 11, 2007 - 1:26 pm

Mike Galbraith wrote:
I would agree with preliminary testing, save that if you get a lot of 
processes updating the screen at once, there seems to be a notable case 
of processes getting no CPU for 100-300ms, followed by a lot of CPU.

I see this clearly with the "glitch1" test with four scrolling xterms 
and glxgears, but also watching videos with little busy processes on the 
screen. The only version where I never see this in test or with real use 
is cfs-v13.

-- 
Bill Davidsen <davidsen@tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot

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Messages in current thread:
[patch] CFS scheduler, -v19, Ingo Molnar, (Fri Jul 6, 1:33 pm)
Re: [patch] CFS scheduler, -v19, Ed Tomlinson, (Sat Jul 14, 1:19 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 16, 5:17 am)
Re: [patch] CFS scheduler, -v19, Ed Tomlinson, (Mon Jul 16, 7:10 am)
Re: [patch] CFS scheduler, -v19, Mike Galbraith, (Sun Jul 15, 1:25 am)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 16, 4:00 am)
Re: [patch] CFS scheduler, -v19, Markus, (Sun Jul 15, 8:53 am)
Re: [patch] CFS scheduler, -v19, Mike Galbraith, (Sun Jul 15, 3:46 pm)
Re: [patch] CFS scheduler, -v19, Markus, (Sun Jul 15, 5:11 pm)
Re: [patch] CFS scheduler, -v19, Mike Galbraith, (Mon Jul 16, 2:42 am)
Re: [patch] CFS scheduler, -v19, Markus, (Sat Jul 14, 7:34 am)
Re: [patch] CFS scheduler, -v19, Markus, (Sat Jul 14, 11:11 am)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 16, 5:41 am)
Re: [patch] CFS scheduler, -v19, Markus, (Mon Jul 16, 1:59 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 3:37 am)
Re: [patch] CFS scheduler, -v19, Markus, (Tue Jul 17, 9:06 am)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 1:06 pm)
Re: [patch] CFS scheduler, -v19, Markus, (Tue Jul 17, 3:42 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 4:09 pm)
Re: [patch] CFS scheduler, -v19, Linus Torvalds, (Tue Jul 17, 4:37 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 4:43 pm)
Re: [patch] CFS scheduler, -v19, Markus, (Tue Oct 16, 8:02 pm)
Re: [patch] CFS scheduler, -v19, Markus, (Thu Aug 9, 1:34 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Fri Aug 10, 3:46 am)
Re: [patch] CFS scheduler, -v19, Markus, (Tue Aug 14, 1:15 pm)
Re: [patch] CFS scheduler, -v19, Markus, (Fri Jul 20, 6:26 pm)
Re: konqueror suddenly vanishing, "konqueror: Fatal IO error..., Ingo Molnar, (Sun Jul 22, 7:59 am)
Re: konqueror suddenly vanishing, "konqueror: Fatal IO error..., Markus, (Sun Jul 22, 10:26 am)
Re: [patch] CFS scheduler, -v19, Markus, (Tue Jul 17, 6:03 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 1:13 pm)
Re: [patch] CFS scheduler, -v19, Mike Galbraith, (Tue Jul 10, 4:08 am)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Wed Jul 11, 1:26 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Wed Jul 11, 4:55 pm)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Fri Jul 13, 5:19 pm)
Re: [patch] CFS scheduler, -v19, Chuck Ebbert, (Mon Jul 16, 5:34 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 16, 5:55 pm)
Re: [patch] CFS scheduler, -v19, Ian Kent, (Tue Jul 17, 1:01 am)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 3:45 am)
Re: [patch] CFS scheduler, -v19, Linus Torvalds, (Wed Jul 18, 12:03 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 4:16 am)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Wed Jul 18, 5:37 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 10:32 am)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Thu Jul 19, 10:32 pm)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Thu Jul 19, 1:06 pm)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Thu Jul 19, 1:26 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 1:42 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 1:17 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 1:10 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Thu Jul 19, 4:53 am)
Re: [patch] CFS scheduler, -v19, Ian Kent, (Wed Jul 18, 1:31 pm)
RE: [patch] CFS scheduler, -v19, David Schwartz, (Tue Jul 17, 5:16 pm)
RE: [patch] CFS scheduler, -v19, Ian Kent, (Wed Jul 18, 1:59 am)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Wed Jul 18, 3:54 am)
Re: [patch] CFS scheduler, -v19, Linus Torvalds, (Wed Jul 18, 1:23 pm)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Wed Jul 18, 9:50 am)
Re: [patch] CFS scheduler, -v19, Chuck Ebbert, (Tue Jul 17, 12:30 pm)
Re: [patch] CFS scheduler, -v19, Ian Kent, (Tue Jul 17, 7:17 am)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Tue Jul 17, 1:16 pm)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Tue Jul 17, 9:24 pm)
Re: [patch] CFS scheduler, -v19, Ian Kent, (Wed Jul 18, 2:19 am)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Tue Jul 17, 12:22 am)
Re: [patch] CFS scheduler, -v19, Bill Davidsen, (Thu Jul 12, 8:41 am)
Re: [patch] CFS scheduler, -v19, Willy Tarreau, (Sun Jul 8, 1:46 pm)
Re: [patch] CFS scheduler, -v19, Ingo Molnar, (Mon Jul 9, 6:39 pm)
Re: [patch] CFS scheduler, -v19, Willy Tarreau, (Tue Jul 17, 5:44 pm)