Why is intr taking up so much cpu?

Kostik Belousov kostikbel at gmail.com
Sun Jul 18 10:30:09 UTC 2010


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 ?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 196 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-current/attachments/20100718/e6461761/attachment.pgp


More information about the freebsd-current mailing list