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Last active March 30, 2025 01:08
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處理高ACPI interrupt造成high CPU usage的問題
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high_cpu_usage_for_acpi_notifiy.md

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Description

當使用top命令看到類似於下面的command佔據極高的CPU usage（可能高達20%~30%）。

kworker/0:xx-kacpi_notify

透過下面的命令來列出系統上的ACPI interrupt.

grep . -r /sys/firmware/acpi/interrupts | grep -v " 0"

找到有STS的那個gpe interrupt. 例如，看到下面這樣的字樣

/sys/firmware/acpi/interrupts/gpe6F:203678841 STS enabled unmasked

使用下面的命令，將其關閉

echo "disable" > /sys/firmware/acpi/interrupts/gpe6F

再重新使用top命令看看，是不是該command已經消失，同時CPU loading下降至正常水準。

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