From: Manfred Spraul <manfred@colorfullife.com>
To: anton@samba.org
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.5.50-BK + 24 CPUs
Date: Sun, 08 Dec 2002 22:22:03 +0100 [thread overview]
Message-ID: <3DF3B7FB.9010902@colorfullife.com> (raw)
Anton wrote:
>schedules:
> 56283 total
> 41984 pipe_wait
> 9746 do_work
> 1949 do_exit
> 1834 sys_wait4
>
>ie during the compile we scheduled 56283 times, and 41984 of them were
>caused by pipes.
>
The linux pipe implementation has only a page sized buffer - with 4 kB
pages, transfering 1 MB through a pipe means at 512 context switches.
--
Manfred
next reply other threads:[~2002-12-08 21:14 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-08 21:22 Manfred Spraul [this message]
2002-12-08 21:28 ` 2.5.50-BK + 24 CPUs William Lee Irwin III
2002-12-08 23:22 ` David S. Miller
2002-12-08 23:01 ` William Lee Irwin III
2002-12-09 17:03 ` Manfred Spraul
2002-12-09 20:15 ` David S. Miller
2002-12-09 21:12 ` Manfred Spraul
-- strict thread matches above, loose matches on Subject: below --
2002-12-08 13:09 Anton Blanchard
2002-12-08 14:49 ` Rik van Riel
2002-12-08 16:45 ` Rik van Riel
2002-12-09 14:08 ` Anton Blanchard
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