REPRODUCIBILITY: always
OS VERSION: 5.1.0.8
HARDWARE: Sony Xperia XA2 Plus Dual SIM
UI LANGUAGE: ENG
REGRESSION: yes
DESCRIPTION:
After the upgrade from SFOS 5.0 to 5.1, harbour-systemmonitor shows me a totally different picture on my XA2 dual SIM.
Before (and as long I can remember on this phone), the CPU usage was always jumping from 25% to 100%. After the SFOS 5.1 upgrade, the CPU load dropped to about 10% all of a sudden. That sounds like very good news, but something else also changed: CPU sleep is also no longer detected. Technically, it is calculated as a difference between CLOCK_MONOTONIC and CLOCK_BOOTTIME. But chose values now report as identical. Does that mean something changed so those values are no longer filled correctly, or is there some other sleep related change? I can’t imagine there is no suspending at all, else the battery drain would be much bigger.
But about battery impact: it has gotten a bit worse. The device/battery is quite old, and I could always save some battery life with switching off android support at night and use 2G when on WiFi. But now this makes hardly any difference. Reboots did not change the new pattern. Do other people have similar experiences and on what devices?
The screenshot shows the change after the 5.1 update executed on 22:35.
PRECONDITIONS:
Harbour Systemmonitor installed to check
STEPS TO REPRODUCE:
Upgrade to 5.1 and witness the change
EXPECTED RESULT:
Largely the same pattern as before the upgrade
ACTUAL RESULT:
No more sleep detected using the usual counters
MODIFICATIONS:
patchmanager installed
