Why is intr taking up so much cpu?

[Kostik Belousov]

On Sun, Jul 18, 2010 at 01:14:41AM -0700, Doug Barton wrote:
> On Sat, 17 Jul 2010, Kostik Belousov wrote:
> 
> >Run top in the mode where all system threads are shown separately
> >(e.g. top -HS seems to do it), then watch what thread eats the processor.
> 
> And the winner is!
> 
>    11 root       -32    -     0K   168K WAIT    0   0:28 18.02% {swi4: 
>    clock}
>    11 root    21 -64    -     0K   168K WAIT    0   1:17 18.90% intr
> 
> The first is with -H, the second without.
Most likely it is some callout handling. Just in case, do you have
console screensaver active ?
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