bogoMIPS

[Nikos Mavroyanopoulos]

Μιας και αναφέρθηκε σε προηγούμενο email απο τον DJ Art, (αν και έλεγε MB/sec),
εψαξα λίγο για να δώ τί είναι αυτά τα bogoMIPS. (απο το bogomips faq):

What are bogoMIPS?
  MIPS is short for Millions of Instructions Per Second. It
  is a measure for the computation speed of a program. Like
  most such measures, it is more often abused than used
  properly (it is very difficult to justly compare MIPS for
  different kinds of computers). 

  BogoMips are Linus's invention. The kernel (or was it a
  device driver?) needs a timing loop (the time is too short
  and/or needs to be too exact for a non-busy-loop
  method of waiting), which must be calibrated to the
  processor speed of the machine. Hence, the kernel measures
  at boot time how fast a certain kind of busy loop runs on
  a computer. "Bogo" comes from "bogus", i.e, something
  which is a fake. Hence, the BogoMips value gives some
  indication of the processor speed, but it is way too
  unscientific to be called anything but BogoMips. 
  [...]

Why to pay attention to BogoMips ?
  [...]
  To see whether your system is faster than mine. Of course this
  is completely wrong, unreliable, ill-founded, and utterly useless,
  but all benchmarks suffer from this same problem. So why not
  use it? This inherent stupidity has never before stopped people
  from using benchmarks, has it? :-) 


-- 
Nikos Mavroyanopoulos
mailto:nmav at hellug.gr
I may not be perfect, but parts of me are excellent.
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