Re: ksoftirqd using mysteriously high amounts of CPU time

From: Andrew Morton
Date: Wed Mar 10 2004 - 18:58:02 EST

Brad Laue <brad@xxxxxxxxxx> wrote:
> I'm running into an issue where ksoftirqd/0 consumes a considerably
> larger amount of CPU time than it should, and begins to actively
> consume 99% CPU time during network operations.

Please ensure that the machine was booted with `profile=1' on
the kernel boot command line. The cost of this is negligible.

When the problem starts happening, run:

sudo readprofile -r
sleep 10
sudo readprofile -n -v -m /boot/ | sort -n +2 | tail -40

(make sure that /boot/ refers to the currently-running kernel)
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at