Subject: Re: [linux-audio-user] alsa latency statistics
From: dave willis (dubson_AT_dhammanet.net)
Date: Wed Oct 24 2001 - 11:14:17 EEST
On Wed, 24 Oct 2001, Jörn Nettingsmeier wrote:
> dave willis wrote:
> >
> > i just finished testing several different patched and unpatched linux
> > kernels, and was surprised by the results: all basically the same.
> >
> > alsa range = 33.4% to 33.8% 1.336 ms to 1.352 ms diff = 0.016 ms
> > oss-emu range = 91.6% to 91.9% 3.664 ms to 3.676 ms diff = 0.012 ms
> >
>
> did you generate any load on the system while testing ?
yes. if you look below at the details of my post, i list cpu load as 80%
which is created by latencytest (it varyies from about 76 to 85 when
switching consoles and doing a 'ps ux', which of course increases
latency). i just recompiled it with a load of 0.00, and the alsa stats
were the same (kernel 2.4.12-ac3-pe), but the oss-emu went down to 2.66
ms.
-dave
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