Re: [linux-audio-dev] [Fwd: [PATCH] latency improvements, one reschedule moved]

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Subject: Re: [linux-audio-dev] [Fwd: [PATCH] latency improvements, one reschedule moved]
From: Roger Larsson (roger.larsson_AT_norran.net)
Date: Sat Jul 01 2000 - 20:25:28 EEST

Outch (Thanks Jörn),

Too many lists out there...
linux-audio-dev was the intended target since I am not
even reading linux-sound list...

/RogerL

(Included again for easier use...)

Jörn Nettingsmeier wrote:
>
> this message was just posted to linux-sound.
> might be of interest....
>
> Roger Larsson wrote:
> >
> > Hi Linus, Paul, Benno, ...,
> >
> > [patch against linux-2.4.0-test3-pre2]
> >
> > I cleaned up kswapd and moved its reschedule point.
> > Disk performance is close to the same.
> > Latencies have improved a lot (tested with Bennos latencytest)
> >
> > * sync is still problematic
> > * mmap002 (Quintinela) still gives a 212 ms latency
> > (compared to 423 ms for the unpatched...)
> > * other disk related latencies are down under 30 ms.
> > (streaming read, copy, write)
> > * the number of overruns has dropped considerably!
> > (running 4 buffers with a deadline of 23 ms)
> >
> > /RogerL
> >
> > --
> > Home page:
> > http://www.norran.net/nra02596/
> >
>
> --
> Jörn Nettingsmeier
> Kurfürstenstr. 49
> 45138 Essen, Germany
> http://www.folkwang.uni-essen.de/~nettings/ 

--
Home page:
  http://www.norran.net/nra02596/
patch-2.4.0-test3-pre2-vmscan.latency.2

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