Re: zeroing pages in the idle task?

On Thu, 14 Sep 2000, Takashi Oe wrote:

On Wed, 13 Sep 2000, Geert Uytterhoeven wrote:

quoted

On the m68k, we have some code to guestimate the CPU clock based on the
BogoMIPS (see get_cpuinfo() in arch/m68k/kernel/setup.c). Since we didn't care
about the overhead incurred by interrupt processing, it's not that accurate
though (I get 24.8 MHz on my 25 MHz 68040).

That thought had occured to me.  Only problem is that the relationship
between bogomips and cpu clock speed depends on, well, CPU.  For 601, it's
one to one, and, for 604, two to one, and so on.  I don't know the ratios
for 603, G3, or G4.

It's the same on m68k. Originally I had the ratios for 68040 only (and for
68000, which didn't matter at that time), but very soon I found them out for
other CPUs. All you need is a few testers :-)

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds


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