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46 lines
1.6 KiB
46 lines
1.6 KiB
4 months ago
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# Audio thread log viewer
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It is a tool to draw a time chart from audio thread log. It can make debug
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easier.
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[TOC]
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## Prepare an audio thread log
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The easiest way to get audio thread log is typing `cras_test_client --dump_a`
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in ChromeOS shell.
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The format should be like
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```
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Audio Thread Event Log:
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start at 4434i
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2019-07-02T15:30:46.539479158 cras atlog SET_DEV_WAKE dev:7 hw_level:216 sleep:168
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2019-07-02T15:30:46.539482658 cras atlog DEV_SLEEP_TIME dev:7 wake: 15:30:46.542974324
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2019-07-02T15:30:46.539492991 cras atlog DEV_SLEEP_TIME dev:8 wake: 15:30:46.539358095
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2019-07-02T15:30:46.539501241 cras atlog SLEEP sleep:000000000.000000000 longest_wake:001553999
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...
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```
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## Generate an HTML file
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```
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usage: viewer_c3.py [-h] [-o OUTPUT] [-d] FILE
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Draw time chart from audio thread log
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positional arguments:
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FILE The audio thread log file
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optional arguments:
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-h, --help show this help message and exit
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-o OUTPUT The output HTML file (default: view.html)
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-d Show debug message (default: False)
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```
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## View the result
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Open the output from vierwe_c3.py by Chrome. There are several functions in
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this site:
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+ The blue points show the hardware level change of the audio thread logs.
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Click a point can jump to a corresponding line in the log area.
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+ There are some options can be selected. It can show the event in the chart
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so that users can easily see when a stream is added, when a stream is fetched
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, and so on.
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+ The textarea in the lower right corner can be used to note.
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