"System" process constantly using 50% CPU
Having some issues with my phone. I'm on CNexus' 4.3 stock MK3 rom. The only mods I've done to it is disabling some of the bloat with TB and also have Wanam Xposed installed.
Note that I have seen this behavior on other roms too.
Usually within a day or 2 of doing a reboot, the "system" process will begin using 50% CPU all the time. No wakelocks show up in BBS, and "android system" doesn't show increased usage in the stock battery stats, however other apps can see it happening.
I took a few screenshots with System Panel to show - after running it's monitoring function for a few hours. I also used the command "top" in terminal emulator to generate a text file showing the results:
User 23%, System 34%, IOW 0%, IRQ 0%
User 13 + Nice 141 + Sys 228 + Idle 271 + IOW 0 + IRQ 0 + SIRQ 0 = 653
PID PR CPU% S #THR VSS RSS PCY UID Name
778 0 49% S 143 771668K 149192K fg system system_server
10258 0 4% R 1 1336K 644K root top
381 1 1% S 8 10628K 1808K root /system/bin/netd
8713 1 0% S 1 0K 0K root kworker/u:4
1668 0 0% S 5 5244K 608K root /system/bin/mpdecision
I have renamed qsiff_daemon to .bak to see if it would help with the issue, however it did not. Qosmgr file apparently doesn't exist in this rom.
As you can see in the screenshots, System is at maximum CPU (this is with my phone sitting idle), and it is using a lot of CPU time when my phone was otherwise doing nothing. I also attached a screenshot of OS Monitor showing the process in detail.
Does anyone else have this issue? Any ideas on how to solve it? I can't seem to find a way to get any details as to what "System" is and if there are sub-processes that make it up.
EDIT: More details. Ran Top again, this time so it would name the thread:
User 23%, System 38%, IOW 0%, IRQ 0%
User 14 + Nice 162 + Sys 284 + Idle 283 + IOW 0 + IRQ 0 + SIRQ 0 = 743
PID TID PR CPU% S VSS RSS PCY UID Thread Proc
778 1283 0 48% R 779916K 146584K bg system CountryDetector system_server
12255 12255 1 8% R 1840K 1152K fg u0_a210 top top
8455 8455 0 0% S 0K 0K root kworker/u:3
778 903 0 0% S 779916K 146584K fg system er.ServerThread system_server
1668 1687 0 0% S 5244K 608K root mpdecision /system/bin/mpdecision
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Phone: Samsung Galaxy SIII SPH-L710 flashed to VZW MVNO
ROM: MSG & Chubbz v5.0.2