diff options
Diffstat (limited to 'sound/core/timer.c')
| -rw-r--r-- | sound/core/timer.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c index e7dc56ca4b9..7e5fe2d9166 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -44,11 +44,14 @@ #endif static int timer_limit = DEFAULT_TIMER_LIMIT; +static int timer_tstamp_monotonic = 1; MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); MODULE_DESCRIPTION("ALSA timer interface"); MODULE_LICENSE("GPL"); module_param(timer_limit, int, 0444); MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); +module_param(timer_tstamp_monotonic, int, 0444); +MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); struct snd_timer_user { struct snd_timer_instance *timeri; @@ -381,7 +384,10 @@ static void snd_timer_notify1(struct snd_timer_instance *ti, int event) struct snd_timer_instance *ts; struct timespec tstamp; - getnstimeofday(&tstamp); + if (timer_tstamp_monotonic) + do_posix_clock_monotonic_gettime(&tstamp); + else + getnstimeofday(&tstamp); snd_assert(event >= SNDRV_TIMER_EVENT_START && event <= SNDRV_TIMER_EVENT_PAUSE, return); if (event == SNDRV_TIMER_EVENT_START || @@ -1182,8 +1188,12 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, spin_unlock(&tu->qlock); return; } - if (tu->last_resolution != resolution || ticks > 0) - getnstimeofday(&tstamp); + if (tu->last_resolution != resolution || ticks > 0) { + if (timer_tstamp_monotonic) + do_posix_clock_monotonic_gettime(&tstamp); + else + getnstimeofday(&tstamp); + } if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && tu->last_resolution != resolution) { r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |