ondemand cpufreq handler

[bluebird]

On tuesday, the 5/15/2007, 14:02 -0500 Kurt H Maier wrote:
> On 5/15/07, Arjan van de Ven <arjan at linux.intel.com> wrote:
> >
> > actually you really should use ondemand, at least on Intel hardware.
> > The others are just suboptimal.
> >
> 
> Would you please cite some places we can do more reading on this?  You
> keep saying ondemand is better, and I believe you, but I'd like to
> read about why that is in detail.
> 
> Thanks.
> 

From what I read ondemand is best for Intel CPUs and conservative for
AMD CPUs. Maybe PowerTOP could recommend the governors that way?

Quoted from
http://www.free-it.de/archiv/talks_2005/paper-11017/paper-11017.html

The ondemand governor decreases the frequency step by step if the
processor is idle, but increases it to full processing power if there
seems to be demand for it. It needs to be noted that for example AMD
processors do only allow for step by step switching between frequencies;
using this governor may thus cause unexpected latencies.

The conservative governor tries to overcome the limitation of the 
ondemand governor on AMD CPUs noted above and only increases the CPU
frequency step by step...

Cheers,
Friedrich

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