ACPI Storm / kworker thread hogging first core
vem_rw
New Member Posts: 5 ✭
Processor: N4200
I have found that there is a kworker thread continually running on the first core, taking somewhere between 80% and 95% of that core.
Investigating this further I found that /sys/firmware/acpi/interrupts/gpe03 was being triggered roughly 5000 times per second.
I am able to mask this interrupt, which releases the kworker thread.
I don't know what generates GPE03, so I don't know if this could now be masking a genuine fault.
Comments
-
Tracked this down to a SimCom modem:
- Removed modem (and interrupt mask) and issue not present
- Replace with Sierra Wireless modem and issue not present
- Replace with another SimCom modem (same model) and issue returned
Any thoughts on what the root cause may be?