On Sun, 2001-11-25 at 22:14, Tom Browne wrote:
> Just stuck them online. Don't know what's going on with the big white block
> in the X11 test... is gd writing to offscreen VRAM or something?
>
> http://www.tbrowne.demon.co.uk/latencytest
>
> These were taken with the standard Mandrake 8.1 kernel... 2.4.8... no
> patches applied. Parameters were as default for the run_xxx_test scripts,
> but with 3 buffers.
>
> Note that I had to modify the ALSA open code to get it working with the
> Envy24... fails with a PCM write error #14 if try to use the device
> "hw:0,0"... needed to change it to "plughw:0,0"... why?!?
>
> Machine spec...
>
> 1.2GHz Celeron-II running at 1.5GHz
> ASUS TUSL2-M motheboard (i815EPB)
> 512MB RAM
> Seagate Barracuda IV (UDMA5)
> Savage4 32MB AGP, XFree86 4.1.0
>
> Results were pretty awful to say the least - Linux is doing too much read
> ahead buffering, and too much write-latering... If there's an LL+buffer
> patch for 2.4.15 final, I'll give that a go...
>
> - Tom.
>
Yuck. Those look pretty bad. What kind of video card do you have? Is DMA
enabled on your hard disk? (hdparm)
--
Josh Green
Smurf Sound Font Editor (http://smurf.sourceforge.net)
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