kernel 2.4.22 uses permanently 20% of CPU

nabla

hi all,

i just upgraded to vanilla 2.4.22 and now the cpu-usage stays permanently at about 20%.

its a system thread, not a process.
top: Cpu(s): 8.2% user, 20.7% system, 0.0% nice, 71.2% idle

can somebody tell me how to find out which part of my sytem is using my cpu permanently or even how to solve this?

thanks a lot,
nabla

wishkah · Guru Joined: 09 May 2003 Posts: 441 Location: de

Do you use ACPI? There was a bug a few versions ago where ACPI made the system always consume 100% cpu power... try turning it off, if you use it, if you don't, nevermind

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JayavarMaN · n00b Joined: 27 Aug 2003 Posts: 7

I use 2.4.22 with ACPI and dont have that problem so, it has to be some other option u enabled/disabled...

notbunny · Posted: Wed Sep 03, 2003 2:56 pm Post subject:

I am experiencing the 20-24% constant cpu throttle as well and im using vanilla 2.4.21 from kernel.org. I am personally going to try using kernel 2.4.22 and only using ACPI cpu enumeration only. As I have a dual-p3 and it needs that ACPI support to enumerate the cpu's.
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"Envy is the ulcer of the soul." -Socrates

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notbunny · Posted: Wed Sep 03, 2003 7:34 pm Post subject: still no luck

I went from 2.4.22 vanilla to the current gentoo sources and im still getting 20% system when it SHOULD be idle.. its constant 20-30%.. Im using a SMP kernel as I have a dual proc machine. Im thinking of trying a non-smp non-acpi to see if that makes a difference..

any suggestions??
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"Envy is the ulcer of the soul." -Socrates

-Jeff

notbunny · Posted: Wed Sep 03, 2003 8:21 pm Post subject:

by cat /proc/interrupts (wait 1 min) then cat /proc/interrupts

Uou will notice if its problem relating to interrupts. Ive noticed that I have excessive interrupts from my USB core, I am running VIA Apollo Pro on my ASUS CUV4X-D board.
_________________
"Envy is the ulcer of the soul." -Socrates

-Jeff