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On an Idle Nexus 4 I ran fatrace and observed:
unity8(450): O /system/build.prop
unity8(450): R /system/build.prop
unity8(450): C /system/build.prop
unity8(450): O /system/build.prop
unity8(450): R /system/build.prop
unity8(450): C /system/build.prop
...
etc
This file is mounted on a read-only system, so it won't change during
the process lifetime of unity8, so I wonder why it occasionally polls
this file? Can it cache this data rather than polling it? If we can
reduce the polling it will reduce the power consumption in a deep idle
state of the phone.
** Affects: unity8 (Ubuntu)
Importance: Undecided
Status: Expired
** Tags: mobile-power-consumption
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[unity8] polling of /system/build.prop on idle system
https://bugs.launchpad.net/bugs/1191781
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