Re: [PATCH] Add support for deferrable timers (respun-Mar28)

[Kyle Moffett]

On Mar 29, 2007, at 07:41:12, Andi Kleen wrote:
> > ondemand is the biggest offender and the patch below reduces the  
> > number of interrupts by 50% or more (depending on HZ) on different  
> > test systems here.
>
> Cool!
>
> > Yes. There are quite a few other timers inside kernel that can be  
> > migrated. I will use timer_stats and track others and send in the  
> > patches soon.
>
> Longer term it might make sense to even expose this as a option to  
> user space. Maybe as a new timer in setitimer()? This might safe  
> power with "wiggling desktop applets" too.

Might also be useful to add an extra option to "top" to reduce the  
polling frequency if the system is otherwise idle.  A fixed 30-sec  
timer and a deferrable 1-sec timer or somesuch?

Cheers,
Kyle Moffett

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