Many mfgpt timer interrupts with tickless kernel

[Jordan Crouse]

On 22/03/07 18:26 +0100, Jens Axboe wrote:
> The tickless kernel just _enables_ low number of interrupts per second,
> it'll still wakeup everytime something is scheduled to run. So you
> probably want to look into _why_ th timer interrupts happen so often -
> who is the user of them?
> 
> I see ~70 interrupts/sec here with an idle machine in X, FWIW.

I've seen it as low as 10 on a very very quiet machine.  Enable the timer
statistics and run a sample - I'll bet you see some offenders like the
console cursor, the libertas, and other such greedy consumers of our time.

Jordan

-- 
Jordan Crouse
Senior Linux Engineer
Advanced Micro Devices, Inc.
<www.amd.com/embeddedprocessors>