From: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
To: "'Nick Piggin'" <nickpiggin@yahoo.com.au>
Cc: "Ingo Molnar" <mingo@elte.hu>, <linux-kernel@vger.kernel.org>,
<linux-ia64@vger.kernel.org>
Subject: RE: Delete scheduler SD_WAKE_AFFINE and SD_WAKE_BALANCE flags
Date: Thu, 28 Jul 2005 16:48:20 -0700 [thread overview]
Message-ID: <200507282348.j6SNmLg02429@unix-os.sc.intel.com> (raw)
In-Reply-To: <42E96B8C.6010005@yahoo.com.au>
Nick Piggin wrote on Thursday, July 28, 2005 4:35 PM
> Wake balancing provides an opportunity to provide some input bias
> into the load balancer.
>
> For example, if you started 100 pairs of tasks which communicate
> through a pipe. On a 2 CPU system without wake balancing, probably
> half of the pairs will be on different CPUs. With wake balancing,
> it should be much better.
Shouldn't the pipe code use synchronous wakeup?
> I hear you might be having problems with recent 2.6.13 kernels? If so,
> it would be really good to have a look that before 2.6.13 goes out the
> door.
Yes I do :-(, apparently bumping up cache_hot_time won't give us the
performance boost we used to see.
- Ken
next prev parent reply other threads:[~2005-07-28 23:48 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-28 23:08 Delete scheduler SD_WAKE_AFFINE and SD_WAKE_BALANCE flags Chen, Kenneth W
2005-07-28 23:34 ` Nick Piggin
2005-07-28 23:48 ` Chen, Kenneth W [this message]
2005-07-29 1:25 ` Nick Piggin
2005-07-29 1:39 ` Chen, Kenneth W
2005-07-29 1:46 ` Nick Piggin
2005-07-29 1:53 ` Chen, Kenneth W
2005-07-29 2:01 ` Nick Piggin
2005-07-29 6:27 ` Chen, Kenneth W
2005-07-29 8:48 ` Nick Piggin
2005-07-29 8:53 ` Ingo Molnar
2005-07-29 8:59 ` Nick Piggin
2005-07-29 9:01 ` Ingo Molnar
2005-07-29 9:07 ` Ingo Molnar
2005-07-29 16:40 ` Ingo Molnar
2005-07-29 11:48 ` [patch] remove wake-balancing Ingo Molnar
2005-07-29 14:13 ` [sched, patch] better wake-balancing Ingo Molnar
2005-07-29 15:02 ` [sched, patch] better wake-balancing, #2 Ingo Molnar
2005-07-29 16:21 ` [sched, patch] better wake-balancing, #3 Ingo Molnar
2005-07-30 0:08 ` Nick Piggin
2005-07-30 7:19 ` Ingo Molnar
2005-07-31 1:15 ` Nick Piggin
2005-08-01 17:13 ` Siddha, Suresh B
2005-08-08 23:18 ` Chen, Kenneth W
2005-07-29 11:26 ` Delete scheduler SD_WAKE_AFFINE and SD_WAKE_BALANCE flags Ingo Molnar
2005-07-29 17:30 ` Chen, Kenneth W
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