tree c70edbb7c5721032783688c50a4eb7a298b6ce65
parent a0e37d286b55bab43ce2c295f98885c9bf77dc95
author Adithya Srinivasan <adsrini@google.com> 1620073486 +0000
committer Adithya Srinivasan <adsrini@google.com> 1620076160 +0000

Limit Predictions size based on count instead of time

We have an arbitrary time of 120ms for the predictions before they
expire. Our assumption was that 120ms is plenty enough for apps & sf
that if they finish beyond this, it's basically a jank. However, with
some traces, we have noticed SF not running in the main thread at all
during setPowerMode() for more than 120ms. This is causing a data loss
in jank classification.

This change addresses this by limiting the number of predictions stored
in TokenManager.

Bug: 187091879
Bug: 186874532
Test: libsurfaceflinger_unittest
Change-Id: I555bfd974585b7e0632eade776d201f1189c81e0