Re: ppc: bogomips at 73 when CPU is at 1GHz

[Gabriel Paubert]

On Wed, May 17, 2006 at 06:18:19AM +0900, Junichi Uekawa wrote:
> Hi,
> 
> I've noticed the very log value on bogomips on self-compiled 2.6.16.16
> on iBook G4.
> 
> [06:12:59]ibookg4:~> cat /proc/cpuinfo
> processor       : 0
> cpu             : 7447A, altivec supported
> clock           : 1066.666000MHz
> revision        : 0.1 (pvr 8003 0101)
> bogomips        : 73.47
> timebase        : 18432000
> machine         : PowerBook6,5
> motherboard     : PowerBook6,5 MacRISC3 Power Macintosh
> detected as     : 287 (iBook G4)
> pmac flags      : 0000001b
> L2 cache        : 512K unified
> pmac-generation : NewWorld
> 
> 
> It was somewhat higher on 2.6.14.
> 
> 
> Apparently I'm not the only person who noticed something similar; 
> but I can't really read spanish:

Well I can (I'm not a from Spain, but been living here
since 1986).

> 
> https://listas.hispalinux.es/pipermail/linux-ppc-es/2006-May/000820.html
> 
> 
> Am I missing something or is everyone seeing this?

Don't worry, bogomips are bogus. Now on PPC they are related to
the processor timebase frequency, which on G3 and G4 processor
is the bus frequency divided by 4.

	Regards,
	Gabriel
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