Re: [tbench regression fixes]: digging out smelly deadmen.

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From: Jiri Kosina

Subject: Re: [tbench regression fixes]: digging out smelly deadmen.

Date: Monday, October 27, 2008 - 6:42 am

On Mon, 27 Oct 2008, Mike Galbraith wrote:

quoted text> > real world workloads. If your fairness hurts throughput that much maybe
> > your scheduler algorithm is just plain *wrong* as it isn't adapting to
> > workload at all well.
> Doesn't seem to be scheduler/fairness.  2.6.22.19 is O(1), and falls
> apart too, I posted the numbers and full dbench output yesterday.

We'll need to look into this a little bit more I think. I have sent out 
some numbers too, and these indicate very clearly that there is more than 
50% performance drop (measured by dbench) just after the very merge of CFS 
in 2.6.23-rc1 merge window.

-- 
Jiri Kosina
SUSE Labs
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Messages in current thread:

[tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Thu Oct 9, 4:17 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Peter Zijlstra, (Thu Oct 9, 10:40 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Fri Oct 10, 1:09 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ingo Molnar, (Fri Oct 10, 2:15 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Fri Oct 10, 3:13 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Fri Oct 10, 4:31 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ingo Molnar, (Fri Oct 10, 4:40 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ingo Molnar, (Fri Oct 10, 4:42 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Fri Oct 10, 4:55 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ingo Molnar, (Fri Oct 10, 4:57 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Fri Oct 10, 6:25 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Sat Oct 11, 6:13 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Peter Zijlstra, (Sat Oct 11, 7:39 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Sat Oct 11, 11:13 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Sat Oct 11, 11:02 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Sat Oct 11, 11:33 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Rafael J. Wysocki, (Fri Oct 24, 3:25 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Fri Oct 24, 4:31 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Fri Oct 24, 8:37 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Fri Oct 24, 9:05 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Fri Oct 24, 10:15 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Fri Oct 24, 10:16 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Fri Oct 24, 10:53 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Fri Oct 24, 10:58 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Fri Oct 24, 11:53 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Sat Oct 25, 12:19 am)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Sat Oct 25, 12:24 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Sat Oct 25, 12:33 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Sat Oct 25, 12:52 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Rafael J. Wysocki, (Sat Oct 25, 4:13 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Jiri Kosina, (Sat Oct 25, 4:10 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Sat Oct 25, 8:55 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Sun Oct 26, 1:46 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Peter Zijlstra, (Sun Oct 26, 2:00 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Andrew Morton, (Sun Oct 26, 2:11 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Sun Oct 26, 2:15 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Sun Oct 26, 2:27 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Andrew Morton, (Sun Oct 26, 2:34 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Sun Oct 26, 3:05 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Sun Oct 26, 3:23 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Sun Oct 26, 4:29 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Rafael J. Wysocki, (Sun Oct 26, 4:33 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Sun Oct 26, 5:23 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Jiri Kosina, (Sun Oct 26, 12:03 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Sun Oct 26, 7:34 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Mon Oct 27, 2:29 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ingo Molnar, (Mon Oct 27, 2:30 am)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Mon Oct 27, 2:57 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Jiri Kosina, (Mon Oct 27, 3:42 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ingo Molnar, (Mon Oct 27, 4:27 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Alan Cox, (Mon Oct 27, 4:33 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Mon Oct 27, 5:06 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Jiri Kosina, (Mon Oct 27, 6:42 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Mon Oct 27, 7:17 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Rick Jones, (Mon Oct 27, 10:26 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ingo Molnar, (Mon Oct 27, 11:33 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Mon Oct 27, 12:11 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Rick Jones, (Mon Oct 27, 12:18 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Mon Oct 27, 12:39 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Mon Oct 27, 12:44 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Mon Oct 27, 12:48 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Tue Oct 28, 3:24 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ingo Molnar, (Tue Oct 28, 3:37 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Tue Oct 28, 3:57 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ingo Molnar, (Tue Oct 28, 4:02 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Tue Oct 28, 7:00 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Mike Galbraith, (Tue Oct 28, 8:22 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Wed Oct 29, 2:14 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Wed Oct 29, 2:50 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Nick Piggin, (Wed Oct 29, 2:59 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Stephen Hemminger, (Thu Oct 30, 11:15 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Thu Oct 30, 11:40 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Eric Dumazet, (Thu Oct 30, 11:43 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Eric Dumazet, (Thu Oct 30, 11:56 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ilpo Järvinen, (Thu Oct 30, 12:01 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Fri Oct 31, 12:52 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ilpo Järvinen, (Fri Oct 31, 2:40 am)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Fri Oct 31, 2:51 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ilpo Järvinen, (Fri Oct 31, 3:42 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Eric Dumazet, (Fri Oct 31, 3:45 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ilpo Järvinen, (Fri Oct 31, 4:01 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Eric Dumazet, (Fri Oct 31, 4:10 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Ilpo Järvinen, (Fri Oct 31, 4:15 am)

Re: [tbench regression fixes]: digging out smelly deadmen., Stephen Hemminger, (Fri Oct 31, 12:57 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Fri Oct 31, 1:10 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Eric Dumazet, (Fri Oct 31, 2:03 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Evgeniy Polyakov, (Fri Oct 31, 2:18 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Fri Oct 31, 4:51 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Stephen Hemminger, (Fri Oct 31, 4:56 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Jay Vosburgh, (Fri Oct 31, 5:16 pm)

Re: [tbench regression fixes]: digging out smelly deadmen., Paolo Ciarrocchi, (Sat Nov 1, 5:51 am)

Re: [tbench regression fixes]: digging out smelly deadmen., David Miller, (Sat Nov 1, 9:40 pm)