Hi!
> > > Sensibly configured power saving/speed throttle systems do not change the
> > > frequency at all. The duty cycle is changed and this controls the cpu
> > > performance but the tsc is constant
> >
> > Do you have an example of notebook that does powersaving like that?
> > I have 2 examples of notebooks with changing TSC speed...
> >
>
> Intel PIIX-based systems will do duty-cycle throttling, for example.
Don't think so. My toshiba is PIIX-based, AFAIC:
root@bug:~# cat /proc/pci
Bus 0, device 5, function 0:
Bridge: Intel Corporation 82371AB PIIX4 ISA (rev 2).
Bus 0, device 5, function 1:
IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 1).
Master Capable. Latency=64.
I/O at 0x1000 [0x100f].
Bus 0, device 5, function 2:
USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 1).
IRQ 11.
Master Capable. Latency=64.
I/O at 0xffe0 [0xffff].
Bus 0, device 5, function 3:
Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 2).
Still, it is willing to run with RDTSC at 300MHz, 150MHz, and
40MHz. (The last one in _extreme_ cases when CPU fan fails -- running
at 40MHz is better than cooking cpu).
--
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Panos Katsaloulis describing me w.r.t. patents at [EMAIL PROTECTED]
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