From: Max Krasnyansky <maxk@qualcomm.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Dimitri Sivanich <sivanich@sgi.com>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Nick Piggin <nickpiggin@yahoo.com.au>,
rostedt@goodmis.org, Oleg Nesterov <oleg@tv-sign.ru>,
"Paul E. McKenney" <paulmck@us.ibm.com>,
Paul Menage <menage@google.com>,
"Randy.Dunlap" <rddunlap@osdl.org>,
suresh.b.siddha@intel.com
Subject: Re: Stop machine threads are getting preemted by the rt period enforcement
Date: Wed, 04 Jun 2008 11:24:01 -0700 [thread overview]
Message-ID: <4846DDC1.1050203@qualcomm.com> (raw)
In-Reply-To: <1212603506.19205.2.camel@lappy.programming.kicks-ass.net>
Peter Zijlstra wrote:
> On Wed, 2008-06-04 at 11:07 -0700, Max Krasnyansky wrote:
>> Peter, Ingo,
>>
>> Take a look at the report below (came up during isolcpu= remove discussions).
>>
>> It looks like stop_machine threads are getting forcefully preempted because
>> they exceed their RT quanta. It's strange because rt period is pretty long.
>> But given that disabling rt period logic solves the issue the machine was not
>> really stuck.
>
> Yeah, I know, I'm already looking at this
I see. Does it look like a bug in the rt period logic ?
Or did the stop_machine thread really run for a long time (in the report that
you got that is) ?
Max
next prev parent reply other threads:[~2008-06-04 18:23 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-02 2:30 Inquiry: Should we remove "isolcpus= kernel boot option? (may have realtime uses) Paul Jackson
2008-06-02 16:42 ` Dimitri Sivanich
2008-06-02 18:39 ` Max Krasnyansky
2008-06-02 21:41 ` Dimitri Sivanich
2008-06-02 21:59 ` Max Krasnyansky
2008-06-03 14:40 ` Dimitri Sivanich
2008-06-03 17:57 ` Max Krasnyanskiy
2008-06-04 14:00 ` Dimitri Sivanich
2008-06-04 18:07 ` Stop machine threads are getting preemted by the rt period enforcement Max Krasnyansky
2008-06-04 18:18 ` Peter Zijlstra
2008-06-04 18:24 ` Max Krasnyansky [this message]
2008-06-04 18:55 ` Peter Zijlstra
2008-06-04 20:14 ` Max Krasnyansky
2008-06-02 22:35 ` Inquiry: Should we remove "isolcpus= kernel boot option? (may have realtime uses) Ingo Oeser
2008-06-02 22:45 ` Peter Zijlstra
2008-06-02 23:04 ` Max Krasnyansky
2008-06-02 23:55 ` Ingo Oeser
2008-06-03 3:32 ` Max Krasnyansky
2008-06-03 23:47 ` Max Krasnyanskiy
2008-06-04 0:41 ` Paul Jackson
2008-06-04 4:32 ` Max Krasnyansky
2008-06-04 4:47 ` Paul Jackson
2008-06-04 12:18 ` Andi Kleen
2008-06-04 17:41 ` Paul Jackson
2008-06-04 18:29 ` Max Krasnyansky
2008-06-04 18:56 ` Peter Zijlstra
2008-06-04 19:34 ` Max Krasnyansky
2008-06-04 18:58 ` Paul Jackson
2008-06-04 19:31 ` Max Krasnyansky
2008-06-04 19:37 ` Paul Jackson
2008-06-04 19:45 ` Max Krasnyansky
2008-06-04 20:05 ` Andi Kleen
2008-06-04 20:23 ` Paul Jackson
2008-06-04 20:03 ` Andi Kleen
2008-06-04 20:16 ` Paul Jackson
2008-06-04 20:33 ` Andi Kleen
2008-06-04 20:38 ` Paul Jackson
2008-06-04 21:16 ` Max Krasnyansky
2008-06-04 21:17 ` Paul Jackson
2008-06-04 21:20 ` Max Krasnyansky
2008-06-04 21:26 ` Paul Jackson
2008-06-04 1:18 ` Nick Piggin
2008-06-04 3:00 ` Max Krasnyansky
2008-06-04 16:18 ` Ingo Oeser
2008-06-04 17:47 ` Max Krasnyansky
2008-06-03 6:03 ` Nick Piggin
2008-06-04 9:58 ` Mark Hounschell
2008-06-04 17:26 ` Paul Jackson
2008-06-04 21:00 ` Mark Hounschell
2008-06-04 21:03 ` Paul Jackson
2008-06-04 19:26 ` Max Krasnyansky
2008-06-04 20:25 ` Peter Zijlstra
2008-06-04 21:44 ` Michael Trimarchi
2008-06-04 21:52 ` Peter Zijlstra
2008-06-05 11:16 ` Michael Trimarchi
2008-06-05 12:07 ` Peter Zijlstra
2008-06-05 14:57 ` Michael Trimarchi
2009-05-08 2:48 ` GeunSik Lim
2008-06-05 11:44 ` Mark Hounschell
2008-06-06 22:28 ` Max Krasnyanskiy
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