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Re: Bogomips - Centrino



Jan Lühr schrieb:
> ja hallo erstmal,...

dito,

> Wo ist denn dann der Unterschied zur Taktrate? 1 GHZ heißt doch eigentlich
> auch 1 Milliarde ASM-Nopes pro Sek.

Auf [1] findest du folgendes:

BogoMips was named "Bogo"Mips for a reason; it's totally bogus as
a benchmark.  It's nothing more than a timer loop -- the kernel runs a
null loop which does nothing but count down to 0.  It calibrates this
loop against the real time clock to see how fast it executes.  From that
point onwards the calibrated loop is used as a way for the kernel to do
timing delay loops; for example a device driver might want to delay for
10 microseconds while hardware does something.

The reported BogoMips figure is just how many times the delay loop can
be executed in one second.  So it really tells you nothing about how
fast the processor is for useful work.

> Keep smiling
> yanosz

MfG Jan

[1] http://www.obsolyte.com/bogomips.html

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