On Mon, 26 Nov 2007 22:36:17 -0600 Robert Hancock <[email protected]> wrote:
> [email protected] wrote:
> > Question: Why is ksoftirqd eating about 5 to 10 percent of my CPU on an idle
> > system? The problem occurs if I config the kernel with tickless
> > support (i.e. CONFIG_TICK_ONESHOT=y). (Thanks to "oprofile" for putting me
> > onto this.)
> >
> > I have noted this same problem on kernel versions: 2.6.23.1, 2.6.23.8 and
> > 2.6.23.9
> >
> > **************************************************************************
> > *** Output from "vmstat -n 1 10" -- Note very high context switch rate ***
> > *** This is on a idle machine! ***
> > **************************************************************************
> >
> > procs -----------memory---------- ---swap-- -----io---- --system--
> > ----cpu----
> > r b swpd free buff cache si so bi bo in cs us sy
> > id wa
> > 0 0 0 1925556 4768 116104 0 0 124 2 6 7538 1 2
> > 96 1
> > 0 0 0 1925556 4768 116104 0 0 0 0 2 147329 0 1
> > 99 0
>
> What did oprofile show? It should be able to narrow down what
> function(s) are responsible for the CPU usage..
Sigh. I just asked a similar thing. Let's look at the mail headers:
Message-ID: <[email protected]>
...
From: [email protected]
From: Robert Hancock <[email protected]>
...
In-reply-to: <fa.c70Wy8WHP3DOaDydQ2D94+Xxx/[email protected]>
Please fix your email client so as to not break threading?
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