From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Helge Hafting <helge.hafting@aitel.hist.no>
Cc: davids@webmaster.com,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
hancockr@shaw.ca
Subject: Re: sched_yield() makes OpenLDAP slow
Date: Thu, 26 Jan 2006 20:01:19 +1100 [thread overview]
Message-ID: <43D88FDF.6040606@yahoo.com.au> (raw)
In-Reply-To: <43D8889E.3020907@aitel.hist.no>
Helge Hafting wrote:
> David Schwartz wrote:
>> nothing says that it can't call pthread_mutex_lock and re-acquire the
>> mutex
>> before any other thread gets around to getting it.
>>
>>
> Wrong.
> The spec says that the mutex must be given to a waiter (if any) at the
> moment of release.
Repeating myself here...
To me it says that the scheduling policy decides at the moment of release.
What if the scheduling policy decides *right then* to give the mutex to
the next running thread that tries to aquire it?
That would be the logical way for a scheduling policy to decide the next
owner of the mutex.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2006-01-26 9:01 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-24 22:59 e100 oops on resume Stefan Seyfried
2006-01-24 23:21 ` Mattia Dongili
2006-01-25 9:02 ` Olaf Kirch
2006-01-25 12:11 ` Olaf Kirch
2006-01-25 13:51 ` sched_yield() makes OpenLDAP slow Howard Chu
2006-01-25 14:38 ` Robert Hancock
2006-01-25 17:49 ` Christopher Friesen
2006-01-25 18:26 ` pthread_mutex_unlock (was Re: sched_yield() makes OpenLDAP slow) Howard Chu
2006-01-25 18:59 ` Nick Piggin
2006-01-25 19:32 ` Howard Chu
2006-01-26 8:51 ` Nick Piggin
2006-01-26 14:15 ` Kyle Moffett
2006-01-26 14:43 ` Howard Chu
2006-01-26 19:57 ` David Schwartz
2006-01-26 20:27 ` Howard Chu
2006-01-26 20:46 ` Nick Piggin
2006-01-26 21:32 ` Howard Chu
2006-01-26 21:41 ` Nick Piggin
2006-01-26 21:56 ` Howard Chu
2006-01-26 22:24 ` Nick Piggin
2006-01-27 8:08 ` Howard Chu
2006-01-27 19:25 ` Philipp Matthias Hahn
2006-02-01 12:31 ` Nick Piggin
2006-01-27 4:27 ` Steven Rostedt
2006-01-26 21:58 ` Christopher Friesen
2006-01-27 4:13 ` Steven Rostedt
2006-01-27 2:16 ` David Schwartz
2006-01-27 8:19 ` Howard Chu
2006-01-27 19:50 ` David Schwartz
2006-01-27 20:13 ` Howard Chu
2006-01-27 21:05 ` David Schwartz
2006-01-27 21:23 ` Howard Chu
2006-01-27 23:31 ` David Schwartz
2006-01-30 8:28 ` Helge Hafting
2006-01-26 10:38 ` Nikita Danilov
2006-01-30 8:35 ` Helge Hafting
2006-01-30 11:13 ` Nikita Danilov
2006-01-31 23:18 ` David Schwartz
2006-01-25 21:06 ` Lee Revell
2006-01-25 22:14 ` Howard Chu
2006-01-26 0:16 ` Robert Hancock
2006-01-26 0:49 ` Howard Chu
2006-01-26 1:04 ` Lee Revell
2006-01-26 1:31 ` Howard Chu
2006-01-26 2:05 ` David Schwartz
2006-01-26 2:48 ` Mark Lord
2006-01-26 3:30 ` David Schwartz
2006-01-26 3:49 ` Samuel Masham
2006-01-26 4:02 ` Samuel Masham
2006-01-26 4:53 ` Lee Revell
2006-01-26 6:14 ` Samuel Masham
2006-01-26 8:54 ` Nick Piggin
2006-01-26 14:24 ` Howard Chu
2006-01-26 14:54 ` Nick Piggin
2006-01-26 15:23 ` Howard Chu
2006-01-26 15:51 ` Nick Piggin
2006-01-26 16:44 ` Howard Chu
2006-01-26 17:34 ` linux-os (Dick Johnson)
2006-01-26 19:00 ` Nick Piggin
2006-01-26 19:14 ` linux-os (Dick Johnson)
2006-01-26 21:12 ` Nick Piggin
2006-01-26 21:31 ` linux-os (Dick Johnson)
2006-01-27 7:06 ` Valdis.Kletnieks
2006-01-30 8:44 ` Helge Hafting
2006-01-30 8:50 ` Howard Chu
2006-01-30 15:33 ` Kyle Moffett
2006-01-30 13:28 ` linux-os (Dick Johnson)
2006-01-30 15:15 ` Helge Hafting
2006-01-26 10:44 ` Nikita Danilov
2006-01-26 0:08 ` Robert Hancock
2006-01-26 1:07 ` sched_yield() makes OpenLDAP slow David Schwartz
2006-01-26 8:30 ` Helge Hafting
2006-01-26 9:01 ` Nick Piggin [this message]
2006-01-26 10:50 ` Nikita Danilov
2006-01-25 19:37 ` e100 oops on resume Jesse Brandeburg
2006-01-25 20:14 ` Olaf Kirch
2006-01-25 22:28 ` Jesse Brandeburg
2006-01-26 0:28 ` Jesse Brandeburg
2006-01-26 9:32 ` Pavel Machek
2006-01-26 19:02 ` Stefan Seyfried
2006-01-26 19:09 ` Olaf Kirch
2006-01-28 11:53 ` Mattia Dongili
2006-01-28 19:53 ` Jesse Brandeburg
2006-02-07 6:57 ` Jeff Garzik
[not found] ` <BAY108-DAV111F6EF46F6682FEECCC1593140@phx.gbl>
[not found] ` <4807377b0601271404w6dbfcff6s4de1c3f785dded9f@mail.gmail.com>
2006-01-30 17:25 ` Can I do a regular read to simulate prefetch instruction? John Smith
[not found] <5uZqb-4fo-15@gated-at.bofh.it>
2006-01-14 22:47 ` sched_yield() makes OpenLDAP slow Robert Hancock
-- strict thread matches above, loose matches on Subject: below --
2006-01-14 19:29 Howard Chu
[not found] <43057641.70700@symas.com.suse.lists.linux.kernel>
[not found] ` <17157.45712.877795.437505@gargle.gargle.HOWL.suse.lists.linux.kernel>
[not found] ` <430666DB.70802@symas.com.suse.lists.linux.kernel>
2005-08-20 13:48 ` Andi Kleen
2005-08-21 19:47 ` Florian Weimer
2005-08-22 5:09 ` Howard Chu
2005-08-22 13:06 ` Andi Kleen
2005-08-22 18:47 ` Howard Chu
2005-08-22 13:20 ` Florian Weimer
2005-08-22 23:19 ` Howard Chu
[not found] <4D8eT-4rg-31@gated-at.bofh.it>
2005-08-20 3:20 ` Robert Hancock
2005-08-20 4:18 ` Nick Piggin
2005-08-20 18:38 ` Howard Chu
2005-08-20 20:57 ` Lee Revell
2005-08-20 21:24 ` Howard Chu
2005-08-21 0:36 ` Nick Piggin
2005-08-21 11:33 ` Nikita Danilov
2005-08-22 8:06 ` Howard Chu
2005-08-20 21:50 ` Lee Revell
2005-08-21 1:04 ` Robert Hancock
2005-08-22 11:44 ` linux-os (Dick Johnson)
2005-08-22 14:26 ` Robert Hancock
2005-08-23 11:17 ` linux-os (Dick Johnson)
2005-08-23 12:07 ` Denis Vlasenko
2005-08-24 3:37 ` Lincoln Dale
2005-08-19 6:03 Howard Chu
2005-08-19 6:34 ` Nick Piggin
2005-08-19 6:59 ` Chris Wedgwood
2005-08-19 22:45 ` Howard Chu
2005-08-19 10:21 ` Nikita Danilov
2005-08-19 23:10 ` Howard Chu
2005-08-20 13:23 ` Nikita Danilov
2005-08-20 19:49 ` Howard Chu
2005-08-20 22:08 ` Nikita Danilov
[not found] <4303DB48.8010902@develer.com.suse.lists.linux.kernel>
[not found] ` <20050818010703.GA13127@nineveh.rivenstone.net.suse.lists.linux.kernel>
[not found] ` <4303F967.6000404@yahoo.com.au.suse.lists.linux.kernel>
[not found] ` <43054D9A.7090509@develer.com.suse.lists.linux.kernel>
2005-08-19 3:19 ` Andi Kleen
2005-08-19 3:30 ` Bernardo Innocenti
2005-08-18 0:50 Bernardo Innocenti
2005-08-18 0:47 ` Con Kolivas
2005-08-18 10:48 ` Maciej Soltysiak
2005-08-18 1:07 ` Joseph Fannin
2005-08-18 2:25 ` Bernardo Innocenti
2005-08-18 2:58 ` Nick Piggin
2005-08-19 3:10 ` Bernardo Innocenti
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