Takashi Iwai <[EMAIL PROTECTED]> writes: > Then check whether XRUN occurs at next. Make sure that you compiled > the driver with debug option (--with-debug=full configure option), > then do the following as root: > > # echo 2 > /proc/asound/card0/pcm2p/xrun_debug > > then play the ac3 file. You'll get stacktraces in kernel messages if > XRUN is detected by the sound driver. It's not perfect but an easy > way.
Since alsa site is down, I've tried to get XRUN traces with the kernel. I've enabled SND_DEBUG and CONFIG_SND_PCM_XRUN_DEBUG. Note that I got a few XRUN while I got a *lot* of ac3 ... err ... hiccups (for lack of a better word). Here's what I got (with your patch) with a recompiled 2.6.17 kernel: (I started ac3dec, then md5sum) Sep 10 13:55:57 gandalf kernel: XRUN: pcmC0D2p Sep 10 13:55:57 gandalf kernel: <f0987cdd> snd_pcm_period_elapsed+0x1ef/0x27d [snd_pcm] <f0b060ad> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1] Sep 10 13:55:57 gandalf kernel: <f0affda5> snd_emu10k1_interrupt+0x2ad/0x390 [snd_emu10k1] <b0123e04> do_timer+0x3a/0x2e2 Sep 10 13:55:57 gandalf kernel: <b010ccc7> mark_offset_pmtmr+0x14/0x34d <b0139e32> handle_IRQ_event+0x23/0x4c Sep 10 13:55:57 gandalf kernel: <b0139ed8> __do_IRQ+0x7d/0xcd <b0105019> do_IRQ+0x19/0x24 Sep 10 13:55:57 gandalf kernel: <b010359e> common_interrupt+0x1a/0x20 <b0101d7c> default_idle+0x0/0x55 Sep 10 13:55:57 gandalf kernel: <b0101da8> default_idle+0x2c/0x55 <b0101e60> cpu_idle+0x8f/0xa8 Sep 10 13:55:57 gandalf kernel: <b03046ee> start_kernel+0x374/0x37b Here's another where I started md5sum *before* ac3dec. : Sep 10 13:59:12 gandalf kernel: XRUN: pcmC0D2p Sep 10 13:59:13 gandalf kernel: <f0986dc1> snd_pcm_update_hw_ptr+0x172/0x1a5 [snd_pcm] <f0987622> snd_pcm_lib_write1+0xed/0x467 [snd_pcm] Sep 10 13:59:13 gandalf kernel: <b012c5b9> remove_wait_queue+0xf/0x34 <b0117d3f> __wake_up+0x2a/0x3d Sep 10 13:59:13 gandalf kernel: <f0987ae4> snd_pcm_lib_write+0xa2/0xac [snd_pcm] <f09884b1> snd_pcm_lib_write_transfer+0x0/0xa2 [snd_pcm] Sep 10 13:59:13 gandalf kernel: <f09852de> snd_pcm_playback_ioctl1+0xd7/0x3de [snd_pcm] <f0985632> snd_pcm_playback_ioctl+0x0/0x1b [snd_pcm] Sep 10 13:59:13 gandalf kernel: <b01622a8> do_ioctl+0x1c/0x5d <b016253b> vfs_ioctl+0x252/0x264 Sep 10 13:59:13 gandalf kernel: <b0162595> sys_ioctl+0x48/0x5f <b0102af3> sysenter_past_esp+0x54/0x75 Sep 10 13:59:21 gandalf kernel: XRUN: pcmC0D2p Sep 10 13:59:21 gandalf kernel: <f0987cdd> snd_pcm_period_elapsed+0x1ef/0x27d [snd_pcm] <f0b060ad> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1] Sep 10 13:59:21 gandalf kernel: <f0affda5> snd_emu10k1_interrupt+0x2ad/0x390 [snd_emu10k1] <b0123e04> do_timer+0x3a/0x2e2 Sep 10 13:59:21 gandalf kernel: <b010ccc7> mark_offset_pmtmr+0x14/0x34d <b0139e32> handle_IRQ_event+0x23/0x4c Sep 10 13:59:21 gandalf kernel: <b0139ed8> __do_IRQ+0x7d/0xcd <b0105019> do_IRQ+0x19/0x24 Sep 10 13:59:21 gandalf kernel: <b010359e> common_interrupt+0x1a/0x20 <b0101d7c> default_idle+0x0/0x55 Sep 10 13:59:21 gandalf kernel: <b0101da8> default_idle+0x2c/0x55 <b0101e60> cpu_idle+0x8f/0xa8 Sep 10 13:59:21 gandalf kernel: <b03046ee> start_kernel+0x374/0x37b Sep 10 13:59:22 gandalf kernel: XRUN: pcmC0D2p Sep 10 13:59:22 gandalf kernel: <f0987cdd> snd_pcm_period_elapsed+0x1ef/0x27d [snd_pcm] <f0b060ad> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1] Sep 10 13:59:22 gandalf kernel: <f0affda5> snd_emu10k1_interrupt+0x2ad/0x390 [snd_emu10k1] <b0139e32> handle_IRQ_event+0x23/0x4c Sep 10 13:59:22 gandalf kernel: <b0139ed8> __do_IRQ+0x7d/0xcd <b0105019> do_IRQ+0x19/0x24 Sep 10 13:59:22 gandalf kernel: <b010359e> common_interrupt+0x1a/0x20 Sep 10 13:59:40 gandalf kernel: XRUN: pcmC0D2p Sep 10 13:59:40 gandalf kernel: <f0987cdd> snd_pcm_period_elapsed+0x1ef/0x27d [snd_pcm] <f0b060ad> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1] Sep 10 13:59:40 gandalf kernel: <f0affda5> snd_emu10k1_interrupt+0x2ad/0x390 [snd_emu10k1] <b0139e32> handle_IRQ_event+0x23/0x4c Sep 10 13:59:40 gandalf kernel: <b0139ed8> __do_IRQ+0x7d/0xcd <b0105019> do_IRQ+0x19/0x24 Sep 10 13:59:40 gandalf kernel: <b010359e> common_interrupt+0x1a/0x20 <b0101d7c> default_idle+0x0/0x55 Sep 10 13:59:40 gandalf kernel: <b0101da8> default_idle+0x2c/0x55 <b0101e60> cpu_idle+0x8f/0xa8 Sep 10 13:59:40 gandalf kernel: <b03046ee> start_kernel+0x374/0x37b Another one (from now on, I've also enabled CONFIG_SND_VERBOSE_PRINTK): Sep 10 14:19:01 gandalf kernel: ALSA sound/core/pcm_lib.c:138: XRUN: pcmC0D2p Sep 10 14:19:01 gandalf kernel: <f0b6a1bd> snd_pcm_period_elapsed+0x217/0x2a5 [snd_pcm] <f0d6520d> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1] Sep 10 14:19:01 gandalf kernel: <f0d5ede6> snd_emu10k1_interrupt+0x2b6/0x3b0 [snd_emu10k1] <b010ccc7> mark_offset_pmtmr+0x14/0x34d Sep 10 14:19:01 gandalf kernel: <b0139e32> handle_IRQ_event+0x23/0x4c <b0139ed8> __do_IRQ+0x7d/0xcd Sep 10 14:19:01 gandalf kernel: <b0105019> do_IRQ+0x19/0x24 <b010359e> common_interrupt+0x1a/0x20 Sep 10 14:21:34 gandalf kernel: ALSA sound/core/pcm_lib.c:138: XRUN: pcmC0D2p Sep 10 14:21:34 gandalf kernel: <f0b691b9> snd_pcm_update_hw_ptr+0x186/0x1b9 [snd_pcm] <f0b69a85> snd_pcm_lib_write1+0xf8/0x485 [snd_pcm] Sep 10 14:21:34 gandalf kernel: <b012c5b9> remove_wait_queue+0xf/0x34 <b0117d3f> __wake_up+0x2a/0x3d Sep 10 14:21:34 gandalf kernel: <f0b69f9c> snd_pcm_lib_write+0xc3/0xcd [snd_pcm] <f0b6a9ef> snd_pcm_lib_write_transfer+0x0/0xad [snd_pcm] Sep 10 14:21:34 gandalf kernel: <f0b67537> snd_pcm_playback_ioctl1+0xec/0x3f3 [snd_pcm] <f0b6788b> snd_pcm_playback_ioctl+0x0/0x1b [snd_pcm] Sep 10 14:21:34 gandalf kernel: <b01622a8> do_ioctl+0x1c/0x5d <b016253b> vfs_ioctl+0x252/0x264 Sep 10 14:21:34 gandalf kernel: <b0162595> sys_ioctl+0x48/0x5f <b0102af3> sysenter_past_esp+0x54/0x75 Sep 10 14:21:37 gandalf kernel: ALSA sound/core/pcm_lib.c:138: XRUN: pcmC0D2p Sep 10 14:21:37 gandalf kernel: <f0b6a1bd> snd_pcm_period_elapsed+0x217/0x2a5 [snd_pcm] <f0d6520d> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1] Sep 10 14:21:37 gandalf kernel: <f0d5ede6> snd_emu10k1_interrupt+0x2b6/0x3b0 [snd_emu10k1] <b0139e32> handle_IRQ_event+0x23/0x4c Sep 10 14:21:37 gandalf kernel: <b0139ed8> __do_IRQ+0x7d/0xcd <b0105019> do_IRQ+0x19/0x24 Sep 10 14:21:37 gandalf kernel: <b010359e> common_interrupt+0x1a/0x20 Sep 10 14:21:38 gandalf kernel: ALSA sound/core/pcm_lib.c:138: XRUN: pcmC0D2p Sep 10 14:21:38 gandalf kernel: <f0b6a1bd> snd_pcm_period_elapsed+0x217/0x2a5 [snd_pcm] <f0d6520d> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1] Sep 10 14:21:38 gandalf kernel: <f0d5ede6> snd_emu10k1_interrupt+0x2b6/0x3b0 [snd_emu10k1] <b0139e32> handle_IRQ_event+0x23/0x4c Sep 10 14:21:38 gandalf kernel: <b0139ed8> __do_IRQ+0x7d/0xcd <b0105019> do_IRQ+0x19/0x24 Sep 10 14:21:38 gandalf kernel: <b010359e> common_interrupt+0x1a/0x20 <b0101d7c> default_idle+0x0/0x55 Sep 10 14:21:38 gandalf kernel: <b0101da8> default_idle+0x2c/0x55 <b0101e60> cpu_idle+0x8f/0xa8 Sep 10 14:21:38 gandalf kernel: <b03046ee> start_kernel+0x374/0x37b Sep 10 14:21:40 gandalf kernel: ALSA sound/core/pcm_lib.c:138: XRUN: pcmC0D2p Sep 10 14:21:40 gandalf kernel: <f0b6a1bd> snd_pcm_period_elapsed+0x217/0x2a5 [snd_pcm] <f0d6520d> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1] Sep 10 14:21:40 gandalf kernel: <f0d5ede6> snd_emu10k1_interrupt+0x2b6/0x3b0 [snd_emu10k1] <b0139e32> handle_IRQ_event+0x23/0x4c Sep 10 14:21:40 gandalf kernel: <b0139ed8> __do_IRQ+0x7d/0xcd <b0105019> do_IRQ+0x19/0x24 Sep 10 14:21:40 gandalf kernel: <b010359e> common_interrupt+0x1a/0x20 <b0101d7c> default_idle+0x0/0x55 Sep 10 14:21:40 gandalf kernel: <b0101da8> default_idle+0x2c/0x55 <b0101e60> cpu_idle+0x8f/0xa8 Sep 10 14:21:40 gandalf kernel: <b03046ee> start_kernel+0x374/0x37b Sep 10 14:21:40 gandalf kernel: ALSA sound/core/pcm_lib.c:138: XRUN: pcmC0D2p Sep 10 14:21:40 gandalf kernel: <f0b6a1bd> snd_pcm_period_elapsed+0x217/0x2a5 [snd_pcm] <f0d6520d> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1] Sep 10 14:21:40 gandalf kernel: <f0d5ede6> snd_emu10k1_interrupt+0x2b6/0x3b0 [snd_emu10k1] <b0139e32> handle_IRQ_event+0x23/0x4c Sep 10 14:21:40 gandalf kernel: <b0139ed8> __do_IRQ+0x7d/0xcd <b0105019> do_IRQ+0x19/0x24 Sep 10 14:21:40 gandalf kernel: <b010359e> common_interrupt+0x1a/0x20 <b0101d7c> default_idle+0x0/0x55 Sep 10 14:21:40 gandalf kernel: <b0101da8> default_idle+0x2c/0x55 <b0101e60> cpu_idle+0x8f/0xa8 Sep 10 14:21:40 gandalf kernel: <b03046ee> start_kernel+0x374/0x37b HTH ------------------------------------------------------------------------- Using Tomcat but need to do more? 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