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Re: [patch] CFS (Completely Fair Scheduler), v2

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From: Ingo Molnar
Subject: Re: [patch] CFS (Completely Fair Scheduler), v2
Date: Tuesday, April 17, 2007 - 9:01 am

* S.Çağlar Onur <caglar@pardus.org.tr> wrote:


yes, it would be nice to do a:

	strace -o kaffine.log -f -tttTTT kaffeine

log. Because in your old log this is visible:

 clone(child_stack=0xb02394a4, 
 flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, 
 parent_tidptr=0xb0239bd8, {entry_number:6, base_addr:0xb0239b90, 
 limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, 
 limit_in_pages:1, seg_not_present:0, useable:1}, 
 child_tidptr=0xb0239bd8) = 11340
 futex(0x89ac218, FUTEX_WAKE, 1)         = 1

we cloned a task and immediately afterwards we used futex 0x89ac218. 
After that point many things happen, but the lockup itself:

 futex(0x89ac218, FUTEX_WAIT, 2, NULL)   = 0
 futex(0x89ac218, FUTEX_WAIT, 2, NULL)   = 0
 futex(0x89ac218, FUTEX_WAIT, 2, NULL)   = 0

is the same futex. Probably related to the same child thread? It would 
be nice to also get a gdb backtrace:

	gdb kaffine
	<reproduce the hang>
	Ctrl-C
	bt

this should give you a gdb backtrace of that kaffeine hang. Thanks,

	Ingo
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Messages in current thread:
[patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Mon Apr 16, 3:07 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, S.Çağlar, (Mon Apr 16, 3:12 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Peter Williams, (Mon Apr 16, 9:06 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Gene Heskett, (Mon Apr 16, 9:53 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Willy Tarreau, (Mon Apr 16, 10:25 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Gene Heskett, (Mon Apr 16, 10:51 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Mike Galbraith, (Mon Apr 16, 10:51 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Mon Apr 16, 11:18 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Mon Apr 16, 11:27 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Peter Williams, (Mon Apr 16, 11:46 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Mon Apr 16, 11:49 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 12:01 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Paolo Ornati, (Tue Apr 17, 12:18 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Davide Libenzi, (Tue Apr 17, 12:31 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 12:39 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, William Lee Irwin III, (Tue Apr 17, 12:51 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Davide Libenzi, (Tue Apr 17, 1:03 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 1:16 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Nick Piggin, (Tue Apr 17, 1:18 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 1:20 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 1:26 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Peter Williams, (Tue Apr 17, 1:30 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Nick Piggin, (Tue Apr 17, 1:41 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 1:52 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 1:57 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 1:59 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 2:53 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Peter Williams, (Tue Apr 17, 7:05 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, S.Çağlar, (Tue Apr 17, 7:45 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Gabriel C, (Tue Apr 17, 8:48 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Ingo Molnar, (Tue Apr 17, 9:01 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Gene Heskett, (Tue Apr 17, 9:12 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Gene Heskett, (Tue Apr 17, 10:15 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Gene Heskett, (Tue Apr 17, 10:18 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Gene Heskett, (Tue Apr 17, 10:22 am)
Re: [patch] CFS (Completely Fair Scheduler), v2, Peter Williams, (Tue Apr 17, 5:06 pm)
Re: [patch] CFS (Completely Fair Scheduler), v2, Peter Williams, (Wed Apr 18, 12:15 pm)