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* [PATCH 00/21] sched: Reduce runqueue lock contention -v6
@ 2011-04-05 15:23 Peter Zijlstra
  2011-04-05 15:23 ` [PATCH 01/21] sched: Provide scheduler_ipi() callback in response to smp_send_reschedule() Peter Zijlstra
                   ` (23 more replies)
  0 siblings, 24 replies; 152+ messages in thread
From: Peter Zijlstra @ 2011-04-05 15:23 UTC (permalink / raw)
  To: Chris Mason, Frank Rowand, Ingo Molnar, Thomas Gleixner,
	Mike Galbraith, Oleg Nesterov, Paul Turner, Jens Axboe,
	Yong Zhang
  Cc: linux-kernel, Peter Zijlstra

This patch series aims to optimize remote wakeups by moving most of the
work of the wakeup to the remote cpu and avoid bouncing runqueue data
structures where possible.

As measured by sembench (which basically creates a wakeup storm) on my
dual-socket westmere:

$ for i in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor ; do echo performance > $i; done
$ echo 4096 32000 64 128 > /proc/sys/kernel/sem
$ ./sembench -t 2048 -w 1900 -o 0

unpatched: run time 30 seconds 647278 worker burns per second
patched:   run time 30 seconds 816715 worker burns per second

I've queued this series for .40.


^ permalink raw reply	[flat|nested] 152+ messages in thread

end of thread, other threads:[~2011-06-08 21:57 UTC | newest]

Thread overview: 152+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-04-05 15:23 [PATCH 00/21] sched: Reduce runqueue lock contention -v6 Peter Zijlstra
2011-04-05 15:23 ` [PATCH 01/21] sched: Provide scheduler_ipi() callback in response to smp_send_reschedule() Peter Zijlstra
2011-04-13 21:15   ` Tony Luck
2011-04-13 21:38     ` Peter Zijlstra
2011-04-14  8:31   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 02/21] sched: Always provide p->on_cpu Peter Zijlstra
2011-04-14  8:31   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 03/21] mutex: Use p->on_cpu for the adaptive spin Peter Zijlstra
2011-04-14  8:32   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 04/21] sched: Change the ttwu success details Peter Zijlstra
2011-04-13  9:23   ` Peter Zijlstra
2011-04-13 10:48     ` Peter Zijlstra
2011-04-13 11:06       ` Peter Zijlstra
2011-04-13 18:39         ` Tejun Heo
2011-04-13 19:11           ` Peter Zijlstra
2011-04-14  8:32   ` [tip:sched/locking] sched: Change the ttwu() " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 05/21] sched: Clean up ttwu stats Peter Zijlstra
2011-04-14  8:33   ` [tip:sched/locking] sched: Clean up ttwu() stats tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 06/21] sched: Provide p->on_rq Peter Zijlstra
2011-04-14  8:33   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 07/21] sched: Serialize p->cpus_allowed and ttwu() using p->pi_lock Peter Zijlstra
2011-04-14  8:34   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 08/21] sched: Drop the rq argument to sched_class::select_task_rq() Peter Zijlstra
2011-04-14  8:34   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 09/21] sched: Remove rq argument to sched_class::task_waking() Peter Zijlstra
2011-04-14  8:35   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 10/21] sched: Deal with non-atomic min_vruntime reads on 32bits Peter Zijlstra
2011-04-14  8:35   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 11/21] sched: Delay task_contributes_to_load() Peter Zijlstra
2011-04-14  8:35   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 12/21] sched: Also serialize ttwu_local() with p->pi_lock Peter Zijlstra
2011-04-14  8:36   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 13/21] sched: Add p->pi_lock to task_rq_lock() Peter Zijlstra
2011-04-14  8:36   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-06-01 13:58     ` Arne Jansen
2011-06-01 16:35       ` Peter Zijlstra
2011-06-01 17:20         ` Arne Jansen
2011-06-01 18:09           ` Peter Zijlstra
2011-06-01 18:44             ` Peter Zijlstra
2011-06-01 19:30               ` Arne Jansen
2011-06-01 21:09                 ` Linus Torvalds
2011-06-03  9:15                   ` Peter Zijlstra
2011-06-03 10:02                     ` Arne Jansen
2011-06-03 10:30                       ` Peter Zijlstra
2011-06-03 11:52                         ` Arne Jansen
2011-06-05  8:17                         ` Ingo Molnar
2011-06-05  8:53                           ` Arne Jansen
2011-06-05  9:41                             ` Ingo Molnar
2011-06-05  9:45                               ` Ingo Molnar
2011-06-05  9:43                           ` Arne Jansen
2011-06-05  9:55                             ` Ingo Molnar
2011-06-05 10:22                               ` Arne Jansen
2011-06-05 11:01                                 ` Ingo Molnar
2011-06-05 11:19                                   ` [debug patch] printk: Add a printk killswitch to robustify NMI watchdog messages Ingo Molnar
2011-06-05 11:36                                     ` Ingo Molnar
2011-06-05 11:57                                       ` Arne Jansen
2011-06-05 13:39                                         ` Ingo Molnar
2011-06-05 13:54                                           ` Arne Jansen
2011-06-05 14:06                                             ` Ingo Molnar
2011-06-05 14:45                                               ` Arne Jansen
2011-06-05 14:10                                             ` Ingo Molnar
2011-06-05 14:31                                               ` Arne Jansen
2011-06-05 15:13                                                 ` Ingo Molnar
2011-06-05 15:26                                                   ` Ingo Molnar
2011-06-05 15:32                                                     ` Ingo Molnar
2011-06-05 16:07                                                       ` Arne Jansen
2011-06-05 16:35                                                         ` Arne Jansen
2011-06-05 16:50                                                           ` Arne Jansen
2011-06-05 17:20                                                             ` Ingo Molnar
2011-06-05 17:42                                                               ` Arne Jansen
2011-06-05 18:59                                                                 ` Ingo Molnar
2011-06-05 19:30                                                                   ` Arne Jansen
2011-06-05 19:44                                                                     ` Ingo Molnar
2011-06-05 20:15                                                                       ` Arne Jansen
2011-06-06  6:56                                                                         ` Arne Jansen
2011-06-06  9:01                                                                         ` Peter Zijlstra
2011-06-06  9:18                                                                           ` Arne Jansen
2011-06-06  9:24                                                                             ` Peter Zijlstra
2011-06-06  9:52                                                                               ` Peter Zijlstra
2011-06-06 10:00                                                                           ` Arne Jansen
2011-06-06 10:26                                                                             ` Peter Zijlstra
2011-06-06 13:25                                                                               ` Peter Zijlstra
2011-06-06 15:04                                                                           ` Ingo Molnar
2011-06-06 15:08                                                                             ` Ingo Molnar
2011-06-06 17:44                                                                               ` Mike Galbraith
2011-06-07  5:20                                                                           ` Mike Galbraith
2011-06-06 13:10                                                                   ` Ingo Molnar
2011-06-06 13:12                                                                     ` Peter Zijlstra
2011-06-06 13:21                                                                       ` Ingo Molnar
2011-06-06 13:31                                                                         ` Peter Zijlstra
2011-06-06  7:34                                                     ` Arne Jansen
2011-06-05 15:34                                                   ` Arne Jansen
2011-06-06  8:38                                                   ` Peter Zijlstra
2011-06-06 14:58                                                     ` Ingo Molnar
2011-06-06 15:09                                                       ` Peter Zijlstra
2011-06-06 15:47                                                         ` Peter Zijlstra
2011-06-06 15:52                                                           ` Ingo Molnar
2011-06-06 16:00                                                             ` Peter Zijlstra
2011-06-06 16:08                                                               ` Ingo Molnar
2011-06-06 16:12                                                                 ` Peter Zijlstra
2011-06-06 16:17                                                                   ` Ingo Molnar
2011-06-06 16:38                                                                     ` Arne Jansen
2011-06-06 16:45                                                                       ` Arne Jansen
2011-06-06 16:53                                                                         ` Peter Zijlstra
2011-06-06 17:07                                                                         ` Ingo Molnar
2011-06-06 17:11                                                                           ` Peter Zijlstra
2011-06-08 15:50                                                                             ` Peter Zijlstra
2011-06-08 19:17                                                                               ` Ingo Molnar
2011-06-08 19:27                                                                                 ` Linus Torvalds
2011-06-08 20:32                                                                                   ` Peter Zijlstra
2011-06-08 20:53                                                                                     ` Linus Torvalds
2011-06-08 20:54                                                                                     ` Thomas Gleixner
2011-06-08 19:45                                                                                 ` Peter Zijlstra
2011-06-08 20:52                                                                                   ` Ingo Molnar
2011-06-08 21:49                                                                                     ` Peter Zijlstra
2011-06-08 21:57                                                                                       ` Thomas Gleixner
2011-06-06 16:44                                                                     ` Peter Zijlstra
2011-06-06 16:50                                                                       ` Peter Zijlstra
2011-06-06 17:13                                                                         ` Ingo Molnar
2011-06-06 17:04                                                                       ` Peter Zijlstra
2011-06-06 17:11                                                                       ` Ingo Molnar
2011-06-06 17:57                                                                         ` Arne Jansen
2011-06-06 18:07                                                                           ` Ingo Molnar
2011-06-06 18:14                                                                             ` Arne Jansen
2011-06-06 18:19                                                                             ` Peter Zijlstra
2011-06-06 22:08                                                                               ` Ingo Molnar
2011-06-03 12:44                       ` [tip:sched/locking] sched: Add p->pi_lock to task_rq_lock() Linus Torvalds
2011-06-03 13:05                         ` Arne Jansen
2011-06-04 21:29                           ` Linus Torvalds
2011-06-04 22:08                             ` Peter Zijlstra
2011-06-04 22:50                               ` Linus Torvalds
2011-06-05  6:01                               ` Arne Jansen
2011-06-05  7:57                                 ` Mike Galbraith
2011-04-05 15:23 ` [PATCH 14/21] sched: Drop rq->lock from first part of wake_up_new_task() Peter Zijlstra
2011-04-14  8:37   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 15/21] sched: Drop rq->lock from sched_exec() Peter Zijlstra
2011-04-14  8:37   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 16/21] sched: Remove rq->lock from the first half of ttwu() Peter Zijlstra
2011-04-14  8:38   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 17/21] sched: Remove rq argument from ttwu_stat() Peter Zijlstra
2011-04-14  8:38   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 18/21] sched: Rename ttwu_post_activation Peter Zijlstra
2011-04-14  8:39   ` [tip:sched/locking] sched: Rename ttwu_post_activation() to ttwu_do_wakeup() tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 19/21] sched: Restructure ttwu some more Peter Zijlstra
2011-04-14  8:39   ` [tip:sched/locking] sched: Restructure ttwu() " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 20/21] sched: Move the second half of ttwu() to the remote cpu Peter Zijlstra
2011-04-14  8:39   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:23 ` [PATCH 21/21] sched: Remove need_migrate_task() Peter Zijlstra
2011-04-14  8:40   ` [tip:sched/locking] " tip-bot for Peter Zijlstra
2011-04-05 15:59 ` [PATCH 00/21] sched: Reduce runqueue lock contention -v6 Peter Zijlstra
2011-04-06 11:00 ` Peter Zijlstra
2011-04-27 16:54 ` Dave Kleikamp

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