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

From: Ingo Molnar
Date: Mon Feb 16 2009 - 15:09:49 EST



* Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> wrote:

> Here the calls to rcu_process_callbacks() are only 75
> microseconds apart, so that this function is consuming more
> than 10% of a CPU. The strange thing is that I don't see a
> raise_softirq() in between, though perhaps it gets inlined or
> something that makes it invisible to ftrace.

look at the latest trace please, that has even the most inline
raise-softirq method instrumented, so all the raising is
visible.

Ingo
--
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/