Re: [PATCH] Updated: Dynamic Tick version 050408-1 - C-state measures

Pavel Machek
2005-04-19T21:09:58Z

Hi!

> The machine is a Pentium M 2.00 GHz, supporting C0-C4 processor power states.
> The machine run at 2.00 GHz all the time.
..
> _passing bm_history=0xFFFFFFFF (default) to processor module:_
>
> Average current the last 470 seconds: *1986mA* (also measured better
> values ~1800, does battery level play a role?!?)

Probably yes. If voltage changes, 2000mA means different ammount of power.

> (cmp. ftp://ftp.suse.com/pub/people/trenn/dyn_tick_c_states/measures_C4_machine/1000_HZ_bm_history_FFFFFFFF)
>
>
> _passing bm_history=0xFF to processor module:_
>
> Average current the last 190 seconds: *1757mA*
> (cmp. ftp://ftp.suse.com/pub/people/trenn/dyn_tick_c_states/measures_C4_machine/1000_HZ_bm_history_FF)
> (Usage count could be bogus, as some invokations could not succeed
> if bm has currently been active).

Ok.

> idle_ms == 100, bm_promote_bs == 30
> Average current the last 80 seconds: *1466mA*
> (cmp.
> ftp://ftp.suse.com/pub/people/trenn/dyn_tick_c_states/measures_C4_machine/tony_dyn_tick_processor_idle_100_bm_30)

Very nice indeed. That seems like ~5W saved, right? That might give
you one more hour of battery life....
Pavel

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