Re: ksoftirqd using mysteriously high amounts of CPU time

[Brad Laue]

Yury V. Umanets wrote:
> On Thu, 2004-03-11 at 19:22, Brad Laue wrote:
>
> > Yury V. Umanets wrote:
> >
> > > Hello,
> > >
> > > I have impression, that it is somehow related to ACPI and CPU
> > > temperature. When CPU gets more hot ksoftirqd starts to eat 99% of CPU.
> > >
> > > It may be checked by disabling ACPI (if enabled) and/or monitoring
> > > /proc/acpi/thermal_zone/THRM/temperature (if any).
> >
> > Happens on a system without ACPI or Power Management of any kind enabled 
> > though.
> >
> > Brad
>
> Then have you seen clear dependence of ksoftirqd getting crazy on system
> load? Or something else?

Not sure what you mean; when the problem begins to get bad, anything 
that tries to use a network interface causes ksoftirqd to jump to 99% 
CPU, and eventually it just stays there at idle. The process trying to 
use the network uses abnormal amounts of CPU time as well.

Brad
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/