Re: [linux-pm] OpPoint summary

[Pavel Machek <pavel@ucw.cz>]

H!

> | > +static struct oppoint lowest = {
> | > +       .name = "lowest",
> | > +       .type = PM_FREQ_CHANGE,
> | > +       .frequency = 0,
> | > +       .voltage = 0,
> | > +       .latency = 15,
> | > +       .prepare_transition  = cpufreq_prepare_transition,
> | > +       .transition = centrino_transition,
> | > +       .finish_transition = cpufreq_finish_transition,
> | > +};
> | 
> | We had nice, descriptive interface... with numbers. Now you want to
> | introduce english state names... looks like a step back to me.
> ---
> 
> Well, a single number is fine if you're describing a scalar abstraction,
> but an operating point is a vector. You can't assume that "399" is three
> times "133" in performance or energy cost, so its "numberness" is simply
> misleading.

"lowest" can simply be mapped to "0", with "low" mapped to "1",
etc.

I believe, using english names is wrong in this case. If you want to
provide vectors... well provide the vectors. Is "medium" operating
point 1GHz on cpu 0 and 2GHz on cpu 1, or is it 1.5 ghz on cpu 0 and
1.5 ghz on cpu 1?
								Pavel

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