From: William Lee Irwin III <wli@holomorphy.com>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>,
linux-kernel@vger.kernel.org, mingo@elte.hu, rml@tech9.net,
riel@surriel.com, akpm@zip.com.au
Subject: Re: unusual scheduling performance
Date: Mon, 18 Nov 2002 12:17:48 -0800 [thread overview]
Message-ID: <20021118201748.GL23425@holomorphy.com> (raw)
In-Reply-To: <3DD92914.1060301@us.ibm.com>
On Mon, Nov 18, 2002 at 09:53:24AM -0800, Dave Hansen wrote:
> I'm seeing the same thing. In my pagecache warmup test, I do 20 greps
> to pull in a 10-gig fileset. Each grep works on 1/20th of the files.
[...]
> So, schedule() is being called a _lot_ more. But, for some reason,
> the slower one wasn't caught doing __copy_to_user() as much.
> Bill, does this look like what you're seeing?
No, I'm seeing strange load balancing behavior. But you seem to have
tripped over a somewhat more severe anomaly.
Bill
next prev parent reply other threads:[~2002-11-18 20:13 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-18 8:18 unusual scheduling performance William Lee Irwin III
2002-11-18 16:34 ` Martin J. Bligh
2002-11-18 16:53 ` William Lee Irwin III
2002-11-18 17:53 ` Dave Hansen
2002-11-18 18:16 ` Andrew Morton
2002-11-18 18:34 ` Davide Libenzi
2002-11-18 18:52 ` Andrew Morton
2002-11-18 18:58 ` Davide Libenzi
2002-11-18 18:56 ` Dave Hansen
2002-11-18 18:59 ` Davide Libenzi
2002-11-18 20:17 ` William Lee Irwin III [this message]
2002-11-18 22:51 ` Dave Hansen
2002-11-18 23:09 ` Andrew Morton
2002-11-18 23:20 ` Davide Libenzi
2002-11-18 23:26 ` Dave Hansen
2002-11-18 23:30 ` Davide Libenzi
2002-11-18 23:33 ` Davide Libenzi
2002-11-20 14:12 ` Ingo Molnar
2002-11-20 22:19 ` William Lee Irwin III
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