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Message-ID: <3DF3B7FB.9010902@colorfullife.com>
Date: Sun, 08 Dec 2002 22:22:03 +0100
From: Manfred Spraul <manfred@colorfullife.com>
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To: anton@samba.org
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Subject: Re: 2.5.50-BK + 24 CPUs
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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

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