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alsa latency error when executed on am335x board

Srini
Genius 5250 points

Dear Ti e2e community,

Am facing the below error, when I tried to execute 

ferryzhou.wordpress.com/.../linux-alsa-latency-test

Even am using the above latency test app , when I run the app am facing the below error in ti sdk 8, could you please test from your end & let us know

root@am335x-evm:/# ./latency -P hw:0,0 -C hw:0,0 -r 8000 -m 128 -M 128 -p -s 1
Scheduler set to Round Robin with priority 99...
Playback device is hw:0,0
Capture device is hw:0,0
Parameters are 8000Hz, S16_LE, 2 channels, non-blocking mode
Poll mode: yes
Loop limit is 8000 frames, minimum latency = 128, maximum latency = 128
Record open error: Invalid argument
root@am335x-evm:/#

Please help me out in resolving this issue as early as possible

Many Thanks in advance
 
  • 0
    TI__Guru**** 393215 points

    Hi,

    I will forward this to the SW team.

  • 0 in reply to Biser Gatchev-XID
    TI__Guru 55345 points

    Hello Srini,

    This is the test result from our side.

    root@am335x-evm:~# ./latency -P hw:0,0 -C hw:0,0 -r 8000 -m 128 -M 128 -p -s 1                                                                                  
Scheduler set to Round Robin with priority 99...                                                                                                                
Playback device is hw:0,0                                                                                                                                       
Capture device is hw:0,0                                                                                                                                        
Parameters are 8000Hz, S16_LE, 2 channels, non-blocking mode                                                                                                    
Poll mode: yes                                                                                                                                                  
Loop limit is 8000 frames, minimum latency = 128, maximum latency = 128                                                                                         
Hardware PCM card 0 'AM335x-EVMSK' device 0 subdevice 0                                                                                                         
Its setup is:                                                                                                                                                   
  stream       : PLAYBACK                                                                                                                                       
  access       : RW_INTERLEAVED                                                                                                                                 
  format       : S16_LE                                                                                                                                         
  subformat    : STD                                                                                                                                            
  channels     : 2                                                                                                                                              
  rate         : 8000                                                                                                                                           
  exact rate   : 8000 (8000/1)                                                                                                                                  
  msbits       : 16                                                                                                                                             
  buffer_size  : 256                                                                                                                                            
  period_size  : 128                                                                                                                                            
  period_time  : 16000                                                                                                                                          
  tstamp_mode  : NONE                                                                                                                                           
  period_step  : 1                                                                                                                                              
  avail_min    : 128                                                                                                                                            
  period_event : 0                                                                                                                                              
  start_threshold  : 2147483647                                                                                                                                 
  stop_threshold   : 256                                                                                                                                        
  silence_threshold: 0                                                                                                                                          
  silence_size : 0                                                                                                                                              
  boundary     : 1073741824                                                                                                                                     
  appl_ptr     : 0                                                                                                                                              
  hw_ptr       : 0                                                                                                                                              
Hardware PCM card 0 'AM335x-EVMSK' device 0 subdevice 0                                                                                                         
Its setup is:                                                                                                                                                   
  stream       : CAPTURE                                                                                                                                        
  access       : RW_INTERLEAVED                                                                                                                                 
  format       : S16_LE                                                                                                                                         
  subformat    : STD                                                                                                                                            
  channels     : 2                                                                                                                                              
  rate         : 8000                                                                                                                                           
  exact rate   : 8000 (8000/1)                                                                                                                                  
  msbits       : 16                                                                                                                                             
  buffer_size  : 256                                                                                                                                            
  period_size  : 128                                                                                                                                            
  period_time  : 16000                                                                                                                                          
  tstamp_mode  : NONE                                                                                                                                           
  period_step  : 1                                                                                                                                              
  avail_min    : 128                                                                                                                                            
  period_event : 0                                                                                                                                              
  start_threshold  : 2147483647                                                                                                                                 
  stop_threshold   : 256                                                                                                                                        
  silence_threshold: 0                                                                                                                                          
  silence_size : 0                                                                                                                                              
  boundary     : 1073741824                                                                                                                                     
  appl_ptr     : 0                                                                                                                                              
  hw_ptr       : 0                                                                                                                                              
Trying latency 256 frames, 32000.000us, 32.000000ms (31.2500Hz)                                                                                                 
Success                                                                                                                                                         
Playback:                                                                                                                                                       
*** frames = 8320 ***                                                                                                                                           
  state       : RUNNING                                                                                                                                         
  trigger_time: 1423939116.998609634                                                                                                                            
  tstamp      : 1423939118.8859176                                                                                                                              
  delay       : 224                                                                                                                                             
  avail       : 32                                                                                                                                              
  avail_max   : 160                                                                                                                                             
Capture:                                                                                                                                                        
*** frames = 8064 ***                                                                                                                                           
  state       : RUNNING                                                                                                                                         
  trigger_time: 1423939116.998602676                                                                                                                            
  tstamp      : 1423939118.9239968                                                                                                                              
  delay       : 0                                                                                                                                               
  avail       : 0                                                                                                                                               
  avail_max   : 128                                                                                                                                             
Maximum read: 128 frames                                                                                                                                        
Maximum read latency: 16000.000us, 16.000000ms (62.5000Hz)                                                                                                      
Playback time = 1423939116.998609, Record time = 1423939116.998602, diff = 7                                                                                    
Segmentation fault                                                                                                                                              
root@am335x-evm:~#

    Best regards,
    Kemal