Embedded Linux Primer

More good stuff from Linux Audio Users. This was a reply by Paul Davis to a query about PCI latency.


> If anyone else has been down this road and knows of how to solve the
> underlying issues (sata hard disk interrupts taking up too much PCI
> bandwidth), I am still searching for an answer and I’m VERY interested
> in hearing something from you.

i didn't write the original version of this, but you might find it
useful. use it as normal system startup script (how to do this varies
depending on your distro, but probably involves /etc/rc.d/init.d)

#!/bin/sh

case $1 in
start)
setpci -v -s "*:*.*" latency_timer=b0
# Update this one with the device you want to optimize
setpci -v -s 04:01.0 latency_timer=ff
esac

exit 0