tree 7efe0585463aa46e86aa76f7fecd51694eddf09d
parent 9d3d54a4642c0b7047fda7555d1eec164b0fd052
author Yabin Cui <yabinc@google.com> 1534201105 -0700
committer Yabin Cui <yabinc@google.com> 1534270208 -0700

simpleperf: set kernel resources used for profiling on Android >=Q.

On Android >=Q, some debug system properties are used to set max
sample freq, cpu percentage and kernel buffer size used for recording.
This patches uses these debug properties to set needed kernel resources.
To set cpu percentage used for recording, add --cpu-percent option.

Bug: 110706031
Test: run simpleperf_unit_test.
Change-Id: I532ce417099c5a39ae89bdadfe76e512241904dd