another trick is install the perf package, and then run "perf top" and
this should show you where the kernel is spending its time (it might
tell us the driver and the driver will tell us what hardware it is).

On Mon, Oct 5, 2020 at 6:22 PM ToddAndMargo via users
<users@lists.fedoraproject.org> wrote:
>
> On 2020-10-05 16:07, Mike Wright wrote:
> > On 10/5/20 3:57 PM, ToddAndMargo via users wrote:
> >> On 2020-10-05 15:48, Mike Wright wrote:
> >>> On 10/5/20 3:37 PM, ToddAndMargo via users wrote:
> >>>> On 2020-10-05 15:31, Mike Wright wrote:
> >>>>> On 10/5/20 3:21 PM, ToddAndMargo via users wrote:
> >>>>>> On 2020-10-05 15:09, Roger Heflin wrote:
> >>>>>>> you need output from "top"
> >>>>>>
> >>>>>> It is the same as htop with less data.  Both
> >>>>>> show virtually no activity.  But htop does show
> >>>>>> core 2 being swamped with something
> >>>>>
> >>>>> When running "top" press "1".  It will give you specifics on each
> >>>>> core/thread.
> >>>>
> >>>> "top" with "1" pressed:
> >>>> https://ibb.co/mCFKRF7
> >>>>
> >>>> Not really seeing anything useful.  Maybe I am missing something.
> >>>
> >>> Look at %Cpu1.  It is using 91.5% of its time servicing hardware
> >>> interrupts.  I looked at two different boxes and neither of them show
> >>> anything > 0.0 on 4 cores or 12 cores.
> >>>
> >>> Maybe it's time to start unplugging devices until that time comes
> >>> down. Then you'll have a culprit.
> >>
> >> I do not understand.  Cpu 2 is the issue, not cpu 1.
> >>
> >> And what do you mean by devices?  I do not even have an flash
> >> drives plugged in.
> >
> > Part 2 :/
> >
> > If you have no external devices then it must be internal.  Could a drive
> > be failing?  Motherboard?
>
> Perhaps.  But a reboot would not clear it up if that
> was the case.
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