Re: [gentoo-user] Kworker use >80% of CPU

[Gleb Klochkov]

Hi everybody, and thank you all!
Excuse me, I did not answer for a long time.
The problem is fixed for now. I delete all old kernels initrd and configs.
The only question now is: why just upgrade to new kernel don`t fix it. For
new kernel it should use default config, shouldn`t it?


--------------------
С уважением, Клочков Глеб


2014-03-21 14:31 GMT+04:00 Volker Armin Hemmann <volkerarmin@××××××××××.com>
:

> Am 20.03.2014 11:24, schrieb Tom Wijsman:
> > On Thu, 20 Mar 2014 11:39:58 +0400
> > Gleb Klochkov <glebiuskv@×××××.com> wrote:
> >
> >> Tom, thank you for your answer.
> >>
> >> $ dmesg >> http://bpaste.net/show/187533/
> > There this can be seen:
> >
> >     [   18.074574] [drm] Wrong MCH_SSKPD value: 0x16040307
> >     [   18.074575] [drm] This can cause pipe underruns and display
> >     issues.
> >     [   18.074575] [drm] Please upgrade your BIOS to fix this.
> >     [   18.148162] [drm] GMBUS [i915 gmbus vga] timed out, falling back
> >     to bit banging on pin 2
> >
> > Above your messages seem interesting; some expected value is wrong, it
> > also times out on a bus and then goes to use a pin instead. Not sure
> > how much of this is intended, but try to upgrade your BIOS as suggested.
> >
> >> $ cat /proc/interrupts >> http://bpaste.net/show/187537/
> > So, that would be this:
> >
> >     8: 63 0 0 0 IO-APIC-edge rtc0
> >
> > Hmm, nothing about it in the dmesg; also, 63 seems low (on my system,
> > however, it's only 1 as I think my system uses something different).
> >
> > You can try a different timer using this kernel parameter:
> >
> >     clocksource=hpet
> >
> > Another note-worthy thing:
> >
> >     9: 699799454 0 0 0 IO-APIC-fasteoi acpi
> >
> > That there are ~700 million ACPI interrupts seems abnormally high;
> > maybe the count is off by one, and 8 refers to 9? On my system, that's
> > been running for a while by now, it's only at ~6000 (six thousand).
>
> uptime
>  11:29:37 up 49 days, 15:48, 16 users,  load average: 0,38, 0,31, 0,39
>
>    8:          0          0          0         48   IO-APIC-edge      rtc0
>    9:          0          0          0          0   IO-APIC-fasteoi   acpi
>
>
> >
> > Changing the ACPI related kernel parameters to try to get it supported
> > differently might be one thing to do here; other than that, it might be
> > something going on with the hardware (try disconnecting things?) so the
> > BIOS upgrade is certainly of interest.
> >
> > Try the BIOS upgrade first, then play around with the parameters; if
> > things don't work out, I suggest you look for support on one of the
> > Linux kernel mailing lists (perhaps acpi-devel*). Good luck.
> >
> >  * https://lists.sourceforge.net/lists/listinfo/acpi-devel
> >
> imho he should first use a recent VANILLA kernel. 2.12 or 2.13.
>
> And build a config without all that unneeded garbage. Also increase the
> dmesg buffer. Most interesting stuff is missing.
>
>