deloptes wrote: > deloptes wrote: > >> Hi community, >> I moved my system to an SSD two days ago. I applied recommendation to >> use "discard" when I noticed that one kworker is using exactly 45% of the >> first cpu. > > > perf says > > > 55.13% [kernel] [k] acpi_os_read_port > 26.65% [kernel] [k] acpi_os_write_port > 8.33% [kernel] [k] __next_timer_interrupt > 5.41% libglib-2.0.so.0.4200.1 [.] > g_io_channel_get_buffer_condition > > > ./perf top -a > > so we now know where the cpu power goes - do you have any idea of this? > > regards
Based on these posts https://bugs.freedesktop.org/show_bug.cgi?id=90014 http://askubuntu.com/questions/176565/why-does-kworker-cpu-usage-get-so-high I found out gpe4D is causing the problem on my system # echo disable > /sys/firmware/acpi/interrupts/gpe4D 2>/dev/null solved the problem regards PS: to find out use # grep . /sys/firmware/acpi/interrupts/gpe*
