[wdmaudiodev] Re: firewire audio at low latency
- From: wdm <wdm@xxxxxxxxxxxxx>
- To: "'wdmaudiodev@xxxxxxxxxxxxx'" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 9 Sep 2003 15:30:31 +0200
> Do you think 1ms DPC delay sounds reasonable (for my 800Mhz PIII)? Does
the
> delay depend on the cpu speed?
> Uwe
It really does not have anything to do with the speed of the CPU, but rather
the quality of the other hardware-drivers in the system. I've heard of a
horrible implementation of the CD-ROM driver in PIO-Mode. It seems that this
could lock the PC at dispatch for tens of msecs... So if you have a really
misbehaving driver you can simply forget low latency...
I'd wish microsoft would tag drivers that stay at dpc for longer than 10msec
in the system-log to be able to find the culprit easily and either remove
the driver or give the developer a kick in the but to improve his stuff ;-)
Tobias
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