Re: ksoftirqd using mysteriously high amounts of CPU time

[Brad Laue <brad@brad-x.com>]

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