No subject

-m512 -M512 , au8830 always fail because of xrun and pulse cannot start the
test


Did the latency test require the driver to support SNDRV_PCM_INFO_SYNC_START
?

latency.c seem using a very large value for the start_threshold

    err = snd_pcm_sw_params_set_start_threshold(handle, swparams,
0x7fffffff);



 ./latency -r 44100 -Phw:1 -Chw:1 -m 512 -M 512
!!!Scheduler set to Round Robin with priority 99 FAILED!!!
Playback device is hw:1
Capture device is hw:1
Parameters are 44100Hz, S16_LE, 2 channels, non-blocking mode
Poll mode: no
Loop limit is 1323000 frames, minimum latency = 512, maximum latency = 512
buffer_size :0 252
Hardware PCM card 1 'HDA Intel' device 0 subdevice 0
Its setup is:
  stream       : PLAYBACK
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 16
  buffer_size  : 512
  period_size  : 256
  period_time  : 5804
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 256
  period_event : 0
  start_threshold  : 2147483647
  stop_threshold   : 512
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
  appl_ptr     : 0
  hw_ptr       : 0
Hardware PCM card 1 'HDA Intel' device 0 subdevice 0
Its setup is:
  stream       : CAPTURE
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 16
  buffer_size  : 512
  period_size  : 256
  period_time  : 5804
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 256
  period_event : 0
  start_threshold  : 2147483647
  stop_threshold   : 512
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
  appl_ptr     : 0
  hw_ptr       : 0
Trying latency 512 frames, 11609.977us, 11.609977ms (86.1328Hz)
Success
Playback:
*** frames = 1323512 ***
  state       : RUNNING
  trigger_time: 18306.838476235
  tstamp      : 18336.838630238
  delay       : 464
  avail       : 48
  avail_max   : 80
Capture:
*** frames = 1323000 ***
  state       : RUNNING
  trigger_time: 18306.838476235
  tstamp      : 18336.838668663
  delay       : 0
  avail       : 0
  avail_max   : 32
Maximum read: 32 frames
Maximum read latency: 725.624us, 0.725624ms (1378.1250Hz)
Hardware sync
Playback time = 18306.838476, Record time = 18306.838476, diff = 0