Very low disk performance on 5.x

[Arne Wörner]

--- Andrey Smagin <samspeedu at 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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