Lee Revell <rlrevell@xxxxxxxxxxx> writes: > It might not be interrupt related, it could be DMA starvation. This has > been observed with some SATA controllers while testing the -rt patches. > The symptom is that the latency traces show the machine going in "slow > motion". > > Dominique: try the -rt kernel, enable latency tracing and post the > output. Done. I've tried with 2.6.18-rt5. CONFIG_LATENCY_TRACE is enabled. Here are the results (still with running "ac3dec -C " and "md5sum *" on a SATA drive): - I get no more ALSA xrun. - /proc/latency_trace is empty - dolby digital output is still considerably chopped. Note that the dolby digital output works fine when: - No I/O is done - heavy I/O on pata HDD (md5sum *) - heavy I/O on DVD reader (md5sum *) Did I miss something with the latency_trace ? Cheers ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
