tree f6953d1e94e45b61cdfbf3805169cc223b6c7cbb
parent 87fcb8c6c18fa934f34b0af5f2f812076c90fabf
author Yabin Cui <yabinc@google.com> 1500512097 -0700
committer Yabin Cui <yabinc@google.com> 1500676616 -0700

simpleperf: support tracing offcpu time.

1. Add --trace-offcpu option in record command, to record the callstack
when a thread is scheduled off cpu.
2. Change the report command to report time spent not running on cpu
when --trace-offcpu option is used for recording.
3. Add related unittests and runtests.

Bug: http://b/37572306
Test: run simpleperf_unit_test.

Change-Id: Ia50cc39c8dde0c8fb1b1facbcb26bbd0a7ab1351