> Even if something else is causing my overruns now, I certainly suspect that > real-time performance could be enhanced by a bit of cache settings tweaking. > If anyone has any info on doing this with a 2.6.test5 kernel, I would love > to get it. My curiosity has been awakened :) I ought to be in bed right now, but I did manage to find what I was looking for. The values I want to adjust are in /proc/sys/vm/. Some basic observations about the effects of different cache settings on I/O performance can be found at: http://drscriptt.riverviewtech.net/linux/enotes/bdflush.html I also found a page with some other potentially useful information for tracking down hard disk I/O operations (although the goal of the document is quite unrelated to audio streaming): http://www-2.cs.cmu.edu/~mukesh/hacks/spindown/t1.html Lastly, I changed the IO_support setting to 1, and Ardour has now been happily recording for an hour and a half! I was also able to run the latency test without overruns (the 4 ms. spike dropped to 2.7 ms.). Thanks so much for your help, Mark & Jan! I'll be looking into the disk caching parameters, and if I come up with any promising results, I'll certainly post my findings. Best regards, |) |)enji Benjamin Flaming -------------------- "The trouble with computers, of course, is that they're very sophisticated idiots."
