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Bug 2882 - summary
Summary: summary
Status: RESOLVED INVALID
Alias: None
Product: SDL
Classification: Unclassified
Component: audio (show other bugs)
Version: don't know
Hardware: ARM Linux
: P2 major
Assignee: Mahendran K
QA Contact: Mahendran K
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-02-16 11:01 UTC by Mahendran K
Modified: 2015-02-18 03:14 UTC (History)
1 user (show)

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Description Mahendran K 2015-02-16 11:01:05 UTC 
Hi,

Issue : CPU load is high (more than 95% @~06:59:26) for 4-6 seconds

Test setup:
Board name = imx6 Dual Lite
audio card name = card 0: imx6qsabreaics4 [imx6q-sabreai-cs42888], device 0: HiFi cs42888-0

asound.conf:
pcm.ratehw {              
        type rate           
        slave {     
                pcm output
                rate 48000  
        }
        converter linear
} 

pcm.output {     
        type hw       
        card imx6qsabreaics4
} 

I have used aplay util to execute the test.
aplay -D ratehw -r44100 -fS16_LE -c2 /dev/urandom -v --period-time=8000 --buffer-time=24000


I have monitored the aplay CPU load for every two seconds.
test_time  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
06:59:22   678 root      20   0  3436 1188 1036 S   10  0.1  41:02.28 aplay
06:59:25   678 root      20   0  3436 1188 1036 R   10  0.1  41:02.54 aplay
06:59:27   678 root      20   0  3436 1188 1036 R   99  0.1  41:05.00 aplay
06:59:30   678 root      20   0  3436 1188 1036 R   10  0.1  41:06.99 aplay
06:59:32   678 root      20   0  3436 1188 1036 S   10  0.1  41:07.24 aplay

Seems like https://bugzilla.libsdl.org/show_bug.cgi?id=2794 bug.

Someone could give a hint on CPU load high scenario and who is causing the problem.

Regards,
Mahendran K
Comment 1 Ryan C. Gordon 2015-02-18 03:14:12 UTC 
This isn't an SDL bug, this sounds like a ALSA driver or libasound bug.

(I suspect Bug #2794 is also not an SDL bug, fwiw, but I'll mention this info there.)

Resolving this bug as INVALID because there's nothing we can do if aplay triggers the problem.

--ryan.