tree 63d5c22159d308650bb8e8659d5a3cf572909569
parent 5e5077115701ae58ce91545fb141fcbf881d6aa0
author Kalesh Singh <kaleshsingh@google.com> 1617119949 -0400
committer Kalesh Singh <kaleshsingh@google.com> 1617752331 -0400

perfetto: Arm mm event trace config

If persist.perfetto.mm_events.enabled=true periodically
arm mm_event trace config.

The config is only armed if perfotto traced daemon is active.

If arming the config fails, the arm interval is increased
by a backoff factor before retrying.

If 10 failures occur in succession, abort trying to arm
the config.

If an alternate vendor trace config is present at
/vendor/etc/mm_events.cfg it will be armed instead of the default.

The mm_events props are configurable from vendor init.

Bug: 183037386
Test: Manual.
        - Set prop enabled,
        - Synthesize memory pressure
        - Verify perfetto trace data captured in bugreport
Change-Id: I48923e03dff97ae04f3c298ac6fc32189ce53a64