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Re: kworker eats 45% from first cpu

From deloptes <deloptes@gmail.com>
Newsgroups linux.debian.user
Subject Re: kworker eats 45% from first cpu
Date 2017-01-09 09:50 +0100
Message-ID <sXDOq-1PC-11@gated-at.bofh.it> (permalink)
References <sXtP3-3WS-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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

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kworker eats 45% from first cpu deloptes <deloptes@gmail.com> - 2017-01-08 23:10 +0100
  Re: kworker eats 45% from first cpu deloptes <deloptes@gmail.com> - 2017-01-09 09:50 +0100
    [SOLVED] Re: kworker eats 45% from first cpu deloptes <deloptes@gmail.com> - 2017-01-09 20:10 +0100

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