Why is intr taking up so much cpu?

Doug Barton dougb at FreeBSD.org
Sun Jul 18 08:14:47 UTC 2010

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.



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