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

Vallabha Hampiholi vallabha.pa at googlemail.com
Mon Jul 25 03:15:16 PDT 2011


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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