tree 0844f13d966891908f421c8faaf1c29f5f19299f
parent fb0faec367832e8fdc05508d831a697972dfa4f2
author Dmitri Plotnikov <dplotnikov@google.com> 1625006852 -0700
committer Dmitri Plotnikov <dplotnikov@google.com> 1625202268 -0700

Address race condition in procstate time tracking

The issue occurs when the application proc state changes
rapidly, e.g. from FOREGROUND to BACKGROUND to CACHED.
The original code would sometimes attribute the time slice
to the wrong proc state.

Bug: 192550308
Test: (on cuttlefish) atest --rerun-until-failure 300 FrameworksCoreTests:com.android.internal.os.BstatsCpuTimesValidationTest -- --abi x86_64

Change-Id: Ic22bbfa3aae701014fc016ec9e2d32b1c528d462