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| author | Jaroslav Kysela <perex@perex.cz> | 2009-05-28 13:21:52 +0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-05-29 13:47:36 +0400 |
| commit | c62a01ad6e746fae9c93f51ea67e0abfd8d94b58 (patch) | |
| tree | a334fb7283e7bf925e61c08dc926288890d2e616 /sound/core | |
| parent | 8bea869c5e56234990e6bad92a543437115bfc18 (diff) | |
| download | linux-c62a01ad6e746fae9c93f51ea67e0abfd8d94b58.tar.xz | |
ALSA: PCM midlevel: introduce mask for xrun_debug() macro
For debugging purposes, it is better to separate actions.
Bit-values:
1: show bad PCM ring buffer pointer
2: show also stack (to debug kernel latency issues)
4: check pointer against system jiffies
Example:
5: show bad PCM ring buffer pointer and do jiffies check
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/pcm_lib.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index adc2b0bd1132..25cb36710ef4 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -126,20 +126,20 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram } #ifdef CONFIG_SND_PCM_XRUN_DEBUG -#define xrun_debug(substream) ((substream)->pstr->xrun_debug) +#define xrun_debug(substream, mask) ((substream)->pstr->xrun_debug & (mask)) #else -#define xrun_debug(substream) 0 +#define xrun_debug(substream, mask) 0 #endif -#define dump_stack_on_xrun(substream) do { \ - if (xrun_debug(substream) > 1) \ - dump_stack(); \ +#define dump_stack_on_xrun(substream) do { \ + if (xrun_debug(substream, 2)) \ + dump_stack(); \ } while (0) static void xrun(struct snd_pcm_substream *substream) { snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); - if (xrun_debug(substream)) { + if (xrun_debug(substream, 1)) { snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n", substream->pcm->card->number, substream->pcm->device, @@ -197,7 +197,7 @@ static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream, #define hw_ptr_error(substream, fmt, args...) \ do { \ - if (xrun_debug(substream)) { \ + if (xrun_debug(substream, 1)) { \ if (printk_ratelimit()) { \ snd_printd("PCM: " fmt, ##args); \ } \ @@ -251,7 +251,7 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream) } /* Do jiffies check only in xrun_debug mode */ - if (!xrun_debug(substream)) + if (!xrun_debug(substream, 4)) goto no_jiffies_check; /* Skip the jiffies check for hardwares with BATCH flag. @@ -342,7 +342,7 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) new_hw_ptr = hw_base + pos; } /* Do jiffies check only in xrun_debug mode */ - if (xrun_debug(substream) && + if (xrun_debug(substream, 4) && ((delta * HZ) / runtime->rate) > jdelta + HZ/100) { hw_ptr_error(substream, "hw_ptr skipping! " |