Subject: [linux-audio-dev] [PATCH really] latency improvements, one reschedule moved
From: Roger Larsson (roger.larsson_AT_norran.net)
Date: Wed Jul 05 2000 - 22:29:31 EEST
Again... :-(
Patch included this time...
/RogerL
Roger Larsson wrote:
>
> Hi Linus,
>
> Cleaned up and corrected some bugs...
> (memory_pressure... !
> unintended reschedule removed)
>
> Sadly the performance went down - slightly.
> Latency looks even nicer. Still some spikes.
> [sync and mmap002 behaviour not corrected]
>
> /RogerL
>
> Roger Larsson wrote:
> >
> > Hi Linus,
> >
> > [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/
> >
> > ------------------------------------------------------------------------
> > Name: patch-2.4.0-test3-pre2-vmscan.latency.2
> > patch-2.4.0-test3-pre2-vmscan.latency.2 Type: Plain Text (text/plain)
> > Encoding: 7bit
>
> --
> Home page:
> http://www.norran.net/nra02596/
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo_AT_kvack.org. For more info on Linux MM,
> see: http://www.linux.eu.org/Linux-MM/
-- Home page: http://www.norran.net/nra02596/
This archive was generated by hypermail 2b28 : Wed Jul 05 2000 - 23:04:29 EEST