tree 22b8d2725b9ce920d7b525fc7fd1967fc32dbbce
parent d55477b23954ec32d46ff4b4ab839b81e5ddba29
author Luke Chang <lukechang@google.com> 1636470874 +0800
committer Luke Chang <lukechang@google.com> 1636616806 +0800

metrics: Add frequency residency metric

Frequency Residency is a useful normalized metric to find
the predominantly frequency and frequency distribution for
devices with dynamic voltage and frequency scaling. This
patch extracts metadata from the clock_set_rate ftrace
events to generate frequency residency metrics.

Bug: 205778323
Test: <trace_processor_shell> --run-metrics android_dvfs \
      <perfetto_trace>
Test: tools/diff_test_trace_processor.py <trace_processor_shell> \
      --trace-filter='dvfs_metric'
Change-Id: Icc6465e23b748b95f774068b9545339fdf2aab9f
Signed-off-by: Luke Chang <lukechang@google.com>