53 lines
2.1 KiB
Text
53 lines
2.1 KiB
Text
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This version of init contains code to perform "bootcharting", i.e. generating log
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files that can be later processed by the tools provided by www.bootchart.org.
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To activate it, you need to define build 'init' with the INIT_BOOTCHART environment
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variable defined to 'true', for example:
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touch system/init/init.c
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m INIT_BOOTCHART=true
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On the emulator, use the new -bootchart <timeout> option to boot with bootcharting
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activated for <timeout> seconds.
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Otherwise, flash your device, and start it. Then create a file on the /data partition
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with a command like the following:
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adb shell 'echo $TIMEOUT > /data/bootchart-start'
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Where the value of $TIMEOUT corresponds to the wanted bootcharted period in seconds;
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for example, to bootchart for 2 minutes, do:
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adb shell 'echo 120 > /data/bootchart-start'
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Reboot your device, bootcharting will begin and stop after the period you gave.
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You can also stop the bootcharting at any moment by doing the following:
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adb shell 'echo 1 > /data/bootchart-stop'
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Note that /data/bootchart-stop is deleted automatically by init at the end of the
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bootcharting. This is not the case of /data/bootchart-start, so don't forget to delete it
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when you're done collecting data:
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adb shell rm /data/bootchart-start
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The log files are placed in /data/bootchart/. you must run the script tools/grab-bootchart.sh
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which will use ADB to retrieve them and create a bootchart.tgz file that can be used with
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the bootchart parser/renderer, or even uploaded directly to the form located at:
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http://www.bootchart.org/download.html
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NOTE: the bootchart.org webform doesn't seem to work at the moment, you can generate an
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image on your machine by doing the following:
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1/ download the sources from www.bootchart.org
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2/ unpack them
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3/ in the source directory, type 'ant' to build the bootchart program
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4/ type 'java -jar bootchart.jar /path/to/bootchart.tgz
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technical note:
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this implementation of bootcharting does use the 'bootchartd' script provided by
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www.bootchart.org, but a C re-implementation that is directly compiled into our init
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program.
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