timer frequency how many hz?

[Arjan van de Ven]

Fabio Nigi - wrote:
> hi to all,
> i try to recompile my kernel 2.6.21.1 for best battery performance 
> i have enabled:
> CONFIG_NO_HZ
> CONFIG_HIGH_RES_TIMERS
> CONFIG_HPET_TIMER
> CONFIG_PREEMPT to low latency desktop
> and timer frequency to 1000hz
> is a good choice or i must select a more slow timer frequency?

when tickless works, the timer frequency no longer matters, so 1000 is 
good.

> 
> why powertop on my centrino's laptop(sony vaio vgn-fs485b) 
> say that i don't enable hpet
> support?

your bios probably doesn't enable it; there is a patch on the powertop 
website to make linux enable it anyway...