Jeremy Fitzhardinge wrote:
>
> On 20-Jan-00 Alan Cox wrote:
> >> How does Linux on the TM3120 (and TM5400) cope with the variable speed
> >> in which the udelay loop is executed?
> >
> > Im told the next gen intel CPU's our udelay() wont work. I'm not under any
> > wonderous NDA's so I dont know why or what magic is planned, but an RDTSC
> > based udelay() has to get done anyway
> Do the Transmeta chips emulate a TSC which goes at a constant rate,
> even though they dynamically change core frequency?
Oh, that would be possible: If they have a PLL which can run at say
15/16 , they can add 16/15 to the TSC every clock.
Roger.
(*) they site 90% of top speed as requiring 90% core voltage, thus
only 71% of the power. So, something close to that resolution must be
possible.
P.S. Does everybody realize that the "cool stuff" in Linus' interview
interviewer: What do you make at Transmeta?
Linus: Stuff.
interviewer: What kind of stuff?
Linus: Cool stuff.
was a clever pun that nobody "got" for half a year or longer?
-- ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 ** *-- BitWizard writes Linux device drivers for any device you may have! --* "I didn't say it was your fault. I said I was going to blame it on you."- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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