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| author | Takashi Iwai <tiwai@suse.de> | 2010-07-08 11:01:17 +0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-07-08 11:01:17 +0400 |
| commit | 54a3b8dc38d47834336400cbe376a3aca0437cae (patch) | |
| tree | aa6141675d3b806d506ae0a32dc34d2d0682da7b /Documentation/sound | |
| parent | f978d36da4024ee22957f74276e944624a8c7f6d (diff) | |
| download | linux-54a3b8dc38d47834336400cbe376a3aca0437cae.tar.xz | |
ALSA: Update documents about new bits of xrun_debug proc file
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound')
| -rw-r--r-- | Documentation/sound/alsa/Procfile.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/Procfile.txt b/Documentation/sound/alsa/Procfile.txt index 07301de12cc4..7fcd1ad96fcc 100644 --- a/Documentation/sound/alsa/Procfile.txt +++ b/Documentation/sound/alsa/Procfile.txt @@ -103,6 +103,8 @@ card*/pcm*/xrun_debug bit 2 = Enable additional jiffies check bit 3 = Log hwptr update at each period interrupt bit 4 = Log hwptr update at each snd_pcm_update_hw_ptr() + bit 5 = Show last 10 positions on error + bit 6 = Do above only once When the bit 0 is set, the driver will show the messages to kernel log when an xrun is detected. The debug message is @@ -122,6 +124,12 @@ card*/pcm*/xrun_debug Bits 3 and 4 are for logging the hwptr records. Note that these will give flood of kernel messages. + When bit 5 is set, the driver logs the last 10 xrun errors and + the proc file shows each jiffies, position, period_size, + buffer_size, old_hw_ptr, and hw_ptr_base values. + + When bit 6 is set, the full xrun log is shown only once. + card*/pcm*/sub*/info The general information of this PCM sub-stream. |