Aaron Schulman cbe13ef59b Added Voltage and Current regulator ftrace events to atrace ... Cherry-pick of c2c6ecd119 from AOSP Tracing the state of the voltage and current regulators enables a developer to attribute power consumption measurements to specific perhipherals and cores. Unlike other indirect methods of tracing when peripherals and cores are toggled, the regulator ftrace event indicates the exact point in time when the kernel switches on or off the device. For example, in the following trace, a developer can see exactly when the krait2 core starts receiving power, and and when the voltage is set for voltage scaling. mpdecision-2172 [000] ...1 1566.665481: regulator_enable: name=krait2 mpdecision-2172 [000] ...1 1566.665493: regulator_enable_delay: name=krait2 mpdecision-2172 [000] ...1 1566.665495: regulator_enable_complete: name=krait2 <...>-4133 [002] ...1 1566.666891: regulator_set_voltage: name=krait2 (1075000-1100000) Change-Id: Ia322206ef74496daf1d9baa03545d8e89e398487 Signed-off-by: Aaron Schulman <aschulman@google.com>		2015-05-07 09:23:23 -07:00
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Android.mk	atrace: clean up tracing option enabling	2012-12-07 14:03:07 -08:00
atrace.cpp	Added Voltage and Current regulator ftrace events to atrace	2015-05-07 09:23:23 -07:00
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