Re: [Bug #12650] Strange load average and ksoftirqd behavior with2.6.29-rc2-git1

From: Damien Wyart
Date: Sun Feb 15 2009 - 04:53:10 EST


> > Load average is between 0.30 and 0.60 when the machine is idle, the
> > two ksoftirqd threads get a very high total running time in top.
> > This is on a P4 machine. On a recent laptop, the load is not as
> > high, but the ksoftirqd threads also get a very high total running
> > time.

> Mind having a look at this anomaly with the function graph tracer? We are
> interested in a representative trace that shows the weird ksoftirq activities.
> [ which trace could possibly pinpoint their origin. ]

> Here's the tracing quickstart:

> http://redhat.com/~mingo/tip.git/tracing-quickstart.txt

> Also attached below. Let me know if you have trouble getting a good trace,
> or if any of the steps were non-intuitive or burdensome to you.

Thanks for your feedback & explanations; I will try to have a look at
all this material asap, I think tomorrow.

Damien
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