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Date: Tue, 3 May 2005 01:18:26 -0700 (PDT)
From: Arne "Wörner" <arne_woerner@yahoo.com>
To: SAMU <samspeedu@mail.ru>, freebsd-performance@freebsd.org
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Subject: Re: Very low disk performance on 5.x
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--- Andrey Smagin <samspeedu@mail.ru> wrote:
> driver :) ) or call of SB buffer fill. How to diagnose what
> uninterruptable
> process(or in system function) can to lock CPU for so much time
> (1 sound buffer - 4096 bytes 4096/176400=~23ms) ? And, please,
> help me with
> tuning of sound performance. I think it depend from disk issues.
> 
I can produce the same effect here with
  dd if=/dev/zero of=/dev/null bs=400k count=10000
(no disc involved). It gets very nasty with bs=1m

-Arne


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