From: Nick Piggin <nickpiggin@yahoo.com.au>
To: "linux-os (Dick Johnson)" <linux-os@analogic.com>
Cc: Howard Chu <hyc@symas.com>, Lee Revell <rlrevell@joe-job.com>,
Christopher Friesen <cfriesen@nortel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
hancockr@shaw.ca
Subject: Re: pthread_mutex_unlock (was Re: sched_yield() makes OpenLDAP slow)
Date: Fri, 27 Jan 2006 06:00:03 +1100 [thread overview]
Message-ID: <43D91C33.7050401@yahoo.com.au> (raw)
In-Reply-To: <Pine.LNX.4.61.0601261231460.9298@chaos.analogic.com>
linux-os (Dick Johnson) wrote:
>
> To fix the current problem, you can substitute usleep(0); It will
> give the CPU to somebody if it's computable, then give it back to
> you. It seems to work in every case that sched_yield() has
> mucked up (perhaps 20 to 30 here).
>
That sounds like a terrible hack.
What cases has sched_yield mucked up for you, and why do you
think the problem is sched_yield mucking up? Can you solve it
using mutexes?
Thanks,
Nick
--
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 19:00 UTC|newest]
Thread overview: 88+ 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 [this message]
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
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
2006-01-30 22:01 pthread_mutex_unlock (was Re: sched_yield() makes OpenLDAP slow) linux
2006-01-30 23:37 linux
2006-02-01 17:06 Lee Schermerhorn
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