Re: cvs commit: src/sys/kern kern_spinlock.c src/sys/platform/vkernel/i386 cpu_regs.c src/sys/sys systm.h src/sys/platform/pc32/i386 machdep.c

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Michal Belczyk wrote:
> > > Nice thing is
> > > that one can set voltage and frequency idependently of each other, at least 
> > > on
> > > my cpu ;-)  And it was working with estd.
> >  This actually worked (more as a bug) with the est module as well (always 
> >  operating on the current core).  However, I could not see any benefit 
> >  setting a lower frequency/voltage:  The CPU would run slower, but the fan 
> >  would turn on equally often.
> The fan is another thing to control -- e.g. all the ThinkPads suffer from
> badly programmed embedded controller which is responsible for how it works.

Thing is that it works on windows xp out of the box:  always cool, few fan.

> Anyway, estd should change the frequency depending on system load.  I tried it
> on my laptop simply by running make buildworld and it worked as expected.

Yes, I know.  I was setting it manually and observed reduced performance (openssl benchmark or so), however in idle state it still got as hot as before.  Even when reducing the acpi power state (I think that's the clock duty cycle) to 1 (instead of 8, I think) the system didn't get cooler, just *really* slow.  Really.  I-see-X-painting-slow.  Yet still hot :)

> > > Now it's probably non-compilable
> > > after some SYSINIT-related macros had been renamed.
> > > Note that it's based only on intel docs and my own experiments so there 
> > > might
> > > be bugs in it.
> >  It would be really awesome if you maybe could find the time to integrate 
> >  this into the sources and submit a patch, as you have already considerable 
> >  experience.  Do you think this might be possible?
> Sure it's possible! :-)

Very cool, thanks!

> I'll work on it and send patches.  Have you got some core2duo machine to test
> it before I post it to the submit list?

Yes, but it won't hurt if you run it over submit@, so that it can get more coverage.

thanks
 simon

PS: congratulations to your (almost) masters!

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