Thanks your info! Our driver guy is taking care of this issue. Zhang Xin(Wing) Intel(SSG/OTC) ShangHai China >-----Original Message----- >From: pulseaudio-discuss-bounces at mail.0pointer.de [mailto:pulseaudio- >discuss-bounces at mail.0pointer.de] On Behalf Of Lennart Poettering >Sent: 2009?2?28? 15:58 >To: pulseaudio-discuss at mail.0pointer.de >Subject: Re: [pulseaudio-discuss] PA terminated in stress test > >On Fri, 27.02.09 16:09, Zhang, Xing Z (xing.z.zhang at intel.com) wrote: > >> Hi Lennart: > >Heya! > >> We met an issue when do a stress test on PA. >> We play ~10 streams and do pause/resume on them at will. The PA >terminated after 2 ~ 5 minutes. >> >> Below are logs: >> >> E: alsa-sink.c: ALSA woke us up to write new data to the device, but >there was actually nothing to write! Most likely this is an ALSA driver bug. >Please report this issue to the ALSA developers. We were woken up with >POLLOUT set -- however a subsequent snd_pcm_avail_update() returned 0. >> W: ratelimit.c: 32 events suppressed >> N: alsa-sink.c: Increasing wakeup watermark to 40.00 ms >> N: alsa-sink.c: Increasing wakeup watermark to 80.00 ms >> Soft CPU time limit exhausted, terminating. >> E: cpulimit.c: Received request to terminate due to CPU overload >> >> It seems a configuration issue. Could you give some comments? thanks > >Your sound driver is broken (as noted in the log messages above). > >Some audio drivers do not implement snd_pcm_delay() and >snd_pcm_avail() correctly. e.g. intel-hda on some chips sometimes >overflows in snd_pcm_avail(). Since this call is used to determine how >much data PA must generate and write to the audio device an overflown >value usually means that PA will eat considerable CPU time to fullfill >humungous requests by the sound card. PA's CPU load limiter then >activates itself and terminates PA. > >Also, as noted in log message the sound driver of yours very often >sets POLLOUT although there is nothing to write. That as well is a bug >in the sound driver. It causes PA to spin in its IO loop and results >on unnecessarily high CPU load. > >Please make sure that your sound driver is fixed. > >Also note the recent thread on alsa-devel about this. > >Lennart > >-- >Lennart Poettering Red Hat, Inc. >lennart [at] poettering [dot] net ICQ# 11060553 >http://0pointer.net/lennart/ GnuPG 0x1A015CC4 >_______________________________________________ >pulseaudio-discuss mailing list >pulseaudio-discuss at mail.0pointer.de >https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss
