[pulseaudio-discuss] [PulseAudio-Discuss] PulseAudio System Timer Requirements

[Vallabha Hampiholi]

Just as an update, I see following when invoking the server,

N: alsa-util.c: Disabling timer-based scheduling because high-resolution
timers are not available from the kernel.

How will this affect the system?

I also experienced a strange behaviour. When invoking two gst launches with
pulsesink, pulseaudio server shutdown.

-Rgds
Vallabha
On Mon, Jul 25, 2011 at 3:45 PM, Vallabha Hampiholi <vallabha.pa@
googlemail.com> wrote:

> Dear Experts,
>
> What is PulseAudio's requirements from a system timer perspective?
>
> cat /proc/timer_list
>
> gives me following information. Let me know if it suffices PA's
> requirement. I see that the resolution available is 1/100th of a second.
>
> Timer List Version: v0.6
> HRTIMER_MAX_CLOCK_BASES: 2
> now at 22634717484152 nsecs
>
> cpu: 0
>  clock 0:
>   .base:       c0460160
>   .index:      0
>   .resolution: 10000000 nsecs
>   .get_time:   ktime_get_real
> active timers:
>  clock 1:
>   .base:       c0460188
>   .index:      1
>   .resolution: 10000000 nsecs
>   .get_time:   ktime_get
> active timers:
>  #0: <c0484c58>, sched_rt_period_timer, S:01
>  # expires at 22635000000000-22635000000000 nsecs [in 282515848 to
> 282515848 nsecs]
>   .nohz_mode      : 1
>   .idle_tick      : 22634720000000 nsecs
>   .tick_stopped   : 0
>   .idle_jiffies   : 2233471
>   .idle_calls     : 3361941
>   .idle_sleeps    : 3187525
>   .idle_entrytime : 22634713881502 nsecs
>   .idle_waketime  : 22634713881502 nsecs
>   .idle_exittime  : 22634713918152 nsecs
>   .idle_sleeptime : 21115835861013 nsecs
>   .iowait_sleeptime: 49387606847 nsecs
>   .last_jiffies   : 2233471
>   .next_jiffies   : 2233500
>   .idle_expires   : 22635000000000 nsecs
> jiffies: 2233471
>
> Tick Device: mode:     1
> Per CPU device: 0
> Clock Event Device: gp timer
>  max_delta_ns:   214748367050
>  min_delta_ns:   1000
>  mult:           85899345
>  shift:          32
>  mode:           3
>  next_event:     22634720000000 nsecs
>  set_next_event: omap2_gp_timer_set_next_event
>  set_mode:       omap2_gp_timer_set_mode
>  event_handler:  tick_nohz_handler
>  retries:        0
>
> -Rgds
> Vallabha
>
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