2011/1/21 support support@san.ru

alsa-util.c: snd_pcm_avail() returned a value that is exceptionally large: 675220 bytes (3827 ms). alsa-util.c: Most likely this is a bug in the ALSA driver 'snd_emu10k1'. Please report this issue to the ALSA developers.

http://www.alsa-project.org/db/?f=641d9cb90af2e47e527c2912bee4e34bff41b87b

# rpm -qa | grep alsa alsa-lib-devel-1.0.23-2.fc14.i686 alsa-plugins-pulseaudio-1.0.22-1.fc13.i686 alsa-utils-1.0.23-3.fc14.i686 alsa-lib-1.0.23-2.fc14.i686

# uname -a Linux wp.san.ru 2.6.35.10-74.fc14.i686 #1 SMP Thu Dec 23 16:17:40 UTC 2010 i686 i686 i386 GNU/Linux

Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: Slave: Hardware PCM card 0 'SB Live! [Unknown]' device 0 subdevice 0 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: Its setup is: Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: stream : PLAYBACK Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: access : MMAP_INTERLEAVED Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: format : S16_LE Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: subformat : STD Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: channels : 2 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: rate : 44100 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: exact rate : 44100 (44100/1) Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: msbits : 16 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: buffer_size : 16384 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: period_size : 16384 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: period_time : 371519 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: tstamp_mode : ENABLE Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: period_step : 1 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: avail_min : 16384 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: period_event : 0 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: start_threshold : -1 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: stop_threshold : 1073741824 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: silence_threshold: 0 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: silence_size : 0 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: boundary : 1073741824 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: appl_ptr : 978195372 Jan 21 10:55:20 wp pulseaudio[2393]: alsa-util.c: hw_ptr : 978317001

hwptr 978317001 is ahead of appl_ptr 978195372 indicate xrun occur in PA server since PA server set stop_threshold to boundary

http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m___s_w___params.h...

PCM is automatically stopped in SND_PCM_STATE_XRUN state when available frames is >= threshold. If the stop threshold is equal to boundary (also software parameter - sw_param) then automatic stop will be disabled (thus device will do the endless loop in the ring buffer).

(978317001 - 978195372) > 5 * hw_bufsize

only hda driver has 2 second buffers pa_bytes_per_second(ss)*10 is as same as 5 * hwbuf_size

since buffer size 16384 at 44100Hz of emu10k1 and other sound cards are only 371ms , 5 x 371ms is only 1.5 seconds

you should ask the two PA developers why they add these condition since avail > hw_bufsize is already xrun,

http://git.0pointer.de/?p=pulseaudio.git;a=commitdiff;h=07333f8cae480a25af02...

if (k >= hwbuf_size * 3 || k >= pa_bytes_per_second(ss)*10)

http://git.0pointer.de/?p=pulseaudio.git;a=commitdiff;h=ec9f8f10f358ededa1de...

- if (k >= hwbuf_size * 3 || - k >= pa_bytes_per_second(ss)*10) + if (k >= hwbuf_size * 5 || + k >= pa_bytes_per_second(ss)*10) {

http://git.0pointer.de/?p=pulseaudio.git;a=commitdiff;h=557a90c487a5b681af6c...

if (k >= hwbuf_size * 3 || k >= pa_bytes_per_second(ss)*10)

http://git.0pointer.de/?p=pulseaudio.git;a=commitdiff;h=f29acfd0e0413a9bd126...

if (abs_k >= hwbuf_size * 5 || abs_k >= pa_bytes_per_second(ss)*10) {

if you grep -ir "buffer_bytes_max" , you should notice that only a few sound drivers have a buffer size of 2 seconds

aoa/soundbus/i2sbus/pcm.c: hw->buffer_bytes_max = 131072; arm/aaci.c: .buffer_bytes_max = 64 * 1024, arm/pxa2xx-pcm-lib.c: .buffer_bytes_max = 128 * 1024, atmel/ac97c.c: .buffer_bytes_max = 2 * 2 * 64 * 2048, atmel/abdac.c: .buffer_bytes_max = 64 * 4096, drivers/ml403-ac97cr.c: .buffer_bytes_max = (128*1024), drivers/vx/vx_pcm.c: .buffer_bytes_max = (128*1024), drivers/pcsp/pcsp_lib.c: .buffer_bytes_max = PCSP_BUFFER_SIZE, isa/ad1816a/ad1816a_lib.c: .buffer_bytes_max = (128*1024), isa/es1688/es1688_lib.c: .buffer_bytes_max = 65536, isa/wss/wss_lib.c: .buffer_bytes_max = (128*1024), isa/gus/gus_pcm.c: .buffer_bytes_max = (128*1024), isa/sb/sb8_main.c: .buffer_bytes_max = 65536, isa/sb/sb8_main.c: runtime->hw.buffer_bytes_max = 128 * 1024 * 1024; isa/sb/emu8000_pcm.c: .buffer_bytes_max = (128*1024), isa/sb/sb16_main.c: .buffer_bytes_max = (128*1024), isa/sb/sb16_main.c: runtime->hw.buffer_bytes_max = 32 * 1024; isa/msnd/msnd.c: .buffer_bytes_max = 0x3000, isa/es18xx.c: .buffer_bytes_max = 65536, mips/sgio2audio.c: .buffer_bytes_max = 65536, mips/hal2.c: .buffer_bytes_max = 65536, mips/au1x00.c: .buffer_bytes_max = 128*1024, parisc/harmony.c: .buffer_bytes_max = MAX_BUF_SIZE, pci/cs5535audio/cs5535audio_pcm.c: .buffer_bytes_max = (128*1024), pci/nm256/nm256.c: .buffer_bytes_max = 128 * 1024, pci/bt87x.c: .buffer_bytes_max = 255 * 4092, pci/ctxfi/ctpcm.c: .buffer_bytes_max = (128*1024), pci/ca0106/ca0106_main.c: .buffer_bytes_max = ((65536 - 64) * 8), pci/ca0106/ca0106_main.c: .buffer_bytes_max = 65536 - 128, pci/rme32.c: .buffer_bytes_max = RME32_BUFFER_SIZE, pci/rme32.c: .buffer_bytes_max = RME32_MID_BUFFER_SIZE, pci/aw2/aw2-alsa.c: .buffer_bytes_max = 32768, pci/rme96.c: .buffer_bytes_max = RME96_BUFFER_SIZE, pci/azt3328.c: .buffer_bytes_max = 65536, pci/cmipci.c: .buffer_bytes_max = (128*1024), pci/als300.c: .buffer_bytes_max = 64 * 1024, pci/sonicvibes.c: .buffer_bytes_max = (128*1024), pci/sis7019.c: .buffer_bytes_max = (0xfff9 * 4), pci/ymfpci/ymfpci_main.c: .buffer_bytes_max = 256 * 1024, /* FIXME: enough? */ pci/hda/hda_intel.c: .buffer_bytes_max = AZX_MAX_BUF_SIZE, pci/via82xx.c: .buffer_bytes_max = VIA_MAX_BUFSIZE, pci/es1938.c: .buffer_bytes_max = 0x8000, /* DMA controller screws on higher values */ pci/cs46xx/cs46xx_lib.c: .buffer_bytes_max = (256 * 1024), pci/cs4281.c: .buffer_bytes_max = (512*1024), pci/lx6464es/lx6464es.c: .buffer_bytes_max = 64*2*3*MICROBLAZE_IBL_MAX*MAX_STREAM_BUFFER, pci/korg1212/korg1212.c: .buffer_bytes_max = K1212_MAX_BUF_SIZE, pci/als4000.c: .buffer_bytes_max = 65536, pci/ad1889.c: .buffer_bytes_max = BUFFER_BYTES_MAX, pci/pcxhr/pcxhr.c: .buffer_bytes_max = (32*1024), pci/rme9652/rme9652.c: .buffer_bytes_max = RME9652_CHANNEL_BUFFER_BYTES * 26, pci/rme9652/hdsp.c: .buffer_bytes_max = HDSP_CHANNEL_BUFFER_BYTES * HDSP_MAX_CHANNELS, pci/ens1370.c: .buffer_bytes_max = (128*1024), pci/trident/trident_main.c: .buffer_bytes_max = (128*1024), pci/oxygen/oxygen_pcm.c:#define BUFFER_BYTES_MAX ((1 << 16) * 4) pci/oxygen/oxygen_pcm.c:#define BUFFER_BYTES_MAX_MULTICH ((1 << 24) * 4) pci/oxygen/oxygen_pcm.c:#define DEFAULT_BUFFER_BYTES (BUFFER_BYTES_MAX / 2) pci/intel8x0.c: .buffer_bytes_max = 128 * 1024, pci/intel8x0.c: runtime->hw.buffer_bytes_max = 64*1024; pci/es1968.c: .buffer_bytes_max = 65536, pci/ad1889.h:#define BUFFER_BYTES_MAX (256 * 1024) pci/fm801.c: .buffer_bytes_max = (128*1024), pci/atiixp.c: .buffer_bytes_max = 256 * 1024, pci/au88x0/au88x0_pcm.c: .buffer_bytes_max = 0x10000, pci/echoaudio/echo3g.c: .buffer_bytes_max = 262144, pci/echoaudio/indigoiox.c: .buffer_bytes_max = 262144, pci/echoaudio/layla20.c: .buffer_bytes_max = 262144, pci/echoaudio/mia.c: .buffer_bytes_max = 262144, pci/echoaudio/darla20.c: .buffer_bytes_max = 262144, pci/echoaudio/indigodjx.c: .buffer_bytes_max = 262144, pci/echoaudio/indigo.c: .buffer_bytes_max = 262144, pci/echoaudio/layla24.c: .buffer_bytes_max = 262144, pci/echoaudio/mona.c: .buffer_bytes_max = 262144, pci/echoaudio/gina24.c: .buffer_bytes_max = 262144, pci/echoaudio/indigoio.c: .buffer_bytes_max = 262144, pci/echoaudio/darla24.c: .buffer_bytes_max = 262144, pci/echoaudio/indigodj.c: .buffer_bytes_max = 262144, pci/riptide/riptide.c: .buffer_bytes_max = (64 * 1024), pci/emu10k1/emu10k1x.c: .buffer_bytes_max = (32*1024), pci/emu10k1/p16v.c: .buffer_bytes_max = ((65536 - 64) * 8), pci/emu10k1/p16v.c: .buffer_bytes_max = (65536 - 64), pci/emu10k1/emupcm.c: .buffer_bytes_max = (64*1024), pci/emu10k1/emupcm.c: .buffer_bytes_max = (128*1024), pci/ice1712/ice1712.c: .buffer_bytes_max = (64*1024), pci/ice1712/ice1712.c: .buffer_bytes_max = (128*1024), pci/ice1712/ice1712.c: .buffer_bytes_max = (256*1024), pci/ice1712/ice1724.c: .buffer_bytes_max = (1UL << 21), /* 19bits dword */ pci/ice1712/ice1724.c: .buffer_bytes_max = (1UL << 18), /* 16bits dword */ pci/ali5451/ali5451.c: .buffer_bytes_max = (256*1024), pci/ali5451/ali5451.c: .buffer_bytes_max = (128*1024), pci/maestro3.c: .buffer_bytes_max = (512*1024), pci/mixart/mixart.c: .buffer_bytes_max = (32*1024), pcmcia/pdaudiocf/pdaudiocf_pcm.c: .buffer_bytes_max = (512*1024), ppc/snd_ps3.c: .buffer_bytes_max = PS3_AUDIO_FIFO_SIZE * 64, ppc/pmac.c: .buffer_bytes_max = 131072, sh/sh_dac_audio.c: .buffer_bytes_max = (48*1024), sh/aica.c: .buffer_bytes_max = AICA_BUFFER_SIZE, soc/soc-core.c: runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; soc/au1x/dbdma2.c: .buffer_bytes_max = 4096 * 1024 - 1, soc/s3c24xx/s3c-dma.c: .buffer_bytes_max = 128*1024, soc/omap/omap-pcm.c: .buffer_bytes_max = 128 * 1024, soc/txx9/txx9aclc.c: .buffer_bytes_max = 32 * 1024, soc/sh/siu.h:#define SIU_BUFFER_BYTES_MAX (SIU_PERIOD_BYTES_MAX * SIU_PERIODS_MAX) soc/sh/siu_dai.c: .buffer_bytes_max = SIU_BUFFER_BYTES_MAX, soc/sh/fsi.c: .buffer_bytes_max = 64 * 1024, soc/sh/dma-sh7760.c: .buffer_bytes_max = DMABRG_PERIOD_MAX, soc/davinci/davinci-pcm.c: .buffer_bytes_max = 128 * 1024, soc/atmel/atmel-pcm.c: .buffer_bytes_max = 32 * 1024, soc/fsl/mpc5200_dma.c: .buffer_bytes_max = 2 * 1024 * 1024, soc/fsl/fsl_dma.c: .buffer_bytes_max = 128 * 1024, /* A reasonable limit */ soc/blackfin/bf5xx-i2s-pcm.c: .buffer_bytes_max = 0x20000, /* 128 kbytes */ soc/blackfin/bf5xx-ac97-pcm.c: .buffer_bytes_max = 0x20000, /* 128 kbytes */ soc/blackfin/bf5xx-tdm-pcm.c: .buffer_bytes_max = PCM_BUFFER_MAX, soc/imx/imx-pcm-dma-mx2.c: .buffer_bytes_max = IMX_SSI_DMABUF_SIZE, soc/imx/imx-pcm-fiq.c: .buffer_bytes_max = IMX_SSI_DMABUF_SIZE, soc/s6000/s6000-pcm.c: .buffer_bytes_max = 0x7ffffff0, sparc/amd7930.c: .buffer_bytes_max = (64*1024), sparc/dbri.c: .buffer_bytes_max = 64 * 1024, sparc/cs4231.c: .buffer_bytes_max = 32 * 1024, spi/at73c213.c: .buffer_bytes_max = 64 * 1024 - 1, usb/pcm.c: .buffer_bytes_max = 1024 * 1024, usb/misc/ua101.c: substream->runtime->hw.buffer_bytes_max = 45000 * 1024; usb/caiaq/audio.c: .buffer_bytes_max = MAX_BUFFER_SIZE, usb/usx2y/usx2yhwdeppcm.c: .buffer_bytes_max = (2*128*1024),