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ubuntuでkworkerのcpu使用率がやたら高い

Posted at

/sys/firmware/acpi/interrupts/gpeXXの数値が高いやつを探せばいいらしいです。

$ grep . -r /sys/firmware/acpi/interrupts

...
/sys/firmware/acpi/interrupts/gpe15: 0 enabled
/sys/firmware/acpi/interrupts/gpe16: 5501 enabled
...

gpe16の値が高いので

$ su
$ echo disable > /sys/firmware/acpi/interrupts/gpe16

としてやるとおさまった。


GPE(general purpose event:ハードウェアのイベントいろいろ)をACPIがハンドルして、ACPIのシグナル管理しているkworkerがおしごと。
というものらしいです。変なイベントを拾ってるのかもしれませんね。

環境

$ uname -a

Linux MacBookPro 3.13.0-61-generic #100-Ubuntu SMP Wed Jul 29 11:21:34 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

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