Re: [linux-audio-user] alsa latency statistics

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Subject: Re: [linux-audio-user] alsa latency statistics
From: Jörn Nettingsmeier (nettings_AT_folkwang-hochschule.de)
Date: Thu Oct 25 2001 - 10:05:52 EEST

Josh Green wrote:
>
> On Wed, 2001-10-24 at 07:09, Takashi Iwai wrote:
> >
> > And regarding the lowlatency test itself on 2.4.12 - I had no enough
> > good results without LL patch. At least, wait_for_buffer() in
> > fs/buffer.c holds too long spinlock. And on reiserfs, some additional
> > conditional_schedule()s seem necessary.
> > But one thing is sure: even vailla 2.4.12 is much better than 2.4.9
> > or older.
> >
> >
> > Takashi
>
> You just reminded me, I left out a key bit of information with my
> latency tests (http://www.c0nfusion.org/~josh/). I AM using ReiserFS.
> Thats probably where my spikes are coming from.

hmmm. iirc, andrew m. did look over the reiserfs code when it went
into the standard kernel, and his patch contains reiserfs-specific
scheduling points.
i may be mistaken, though. 

-- 
Jörn Nettingsmeier     
home://Kurfürstenstr.49.45138.Essen.Germany      
phone://+49.201.491621
http://spunk.dnsalias.org
http://www.linuxdj.com/audio/lad/

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