Re: Very low disk performance on 5.x

From: Arne (arne_woerner_at_yahoo.com)
Date: 05/03/05

  • Next message: Andrey Smagin: "Re: Very low disk performance on 5.x" 
    Date: Tue, 3 May 2005 01:18:26 -0700 (PDT)
To: SAMU <samspeedu@mail.ru>, freebsd-performance@freebsd.org

    --- 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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  • Next message: Andrey Smagin: "Re: Very low disk performance on 5.x"

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