cpufreq and changing driver

Marco Calviani marco.calviani at gmail.com
Fri Dec 2 09:05:24 GMT 2005


Hi Bruno,

 > > 2) sorry what about the point that we were discussing above? The high
> > number of transition you were explaining me, are present in the actual
> > implementation of powerd, and if not, why?
>
> It's not present under powerd for the simple fact that to be efficient
> in term of not being too intrusive (kernel to user data transfers, etc),
> powerd can only provide a limited number of check per second (at this
> time, 2 per second).  But the current algorithm present in powerd is
> not well suited in that case.  You have to wait one demi-second
> for the processor being put to full speed if the system was idle
> before.
>

Are there on the horizon any sort of plans to implement a newer and
more efficient algorithm to increase the number of transition per
second? Sorry but i've not understood why linux-cpufreqd is able to
cope with those without being so intrusive.....

Best regards,
MC


More information about the freebsd-acpi mailing list