On Fri, 2006-03-03 at 00:13 +0100, Guennadi Liakhovetski wrote: > On Thu, 2 Mar 2006, Lee Revell wrote: > > > Try enabling latency tracing in the kernel config and see what you get > > in /proc/latency_trace. > > Ok, it failed - it stayed empty. I tried > > echo 2 > /proc/sys/kernel/trace_enabled > gettimeofday(0,1) > gettimeofday(0,0) > > still it stayed empty. Will look at it tomorrow - some more googling will > be needed - never tried it before.
That's for user triggered latency tracing, you want the standard kernel latency tracer: echo 1 > /proc/sys/kernel/trace_enabled echo 0 > /proc/sys/kernel/preempt_max_latency Then try nice -n -20 arecord ..., once you get some underruns: cat /proc/latency_trace Lee ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
