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Subject: Re: more bogomips :)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Christian Kujau <lists@nerdbynature.de>
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Date: Sun, 25 Mar 2007 05:59:13 +1000
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On Sat, 2007-03-24 at 16:48 +0000, Christian Kujau wrote:
> I know bogomips are kinda "bogus by definition", but I'll ask anyway, 
> out of curiosity:
> 
> --- ppc-cpuinfo.2.6.20-rc6      2007-01-27 12:33:00.000000000 +0000
> +++ ppc-cpuinfo.2.6.21-rc4-git6 2007-03-24 16:25:26.000000000 +0000
> @@ -1,8 +1,8 @@
>   processor      : 0
>   cpu            : 7447A, altivec supported
> -clock          : 1199.999997MHz
> +clock          : 1199.999000MHz
>   revision       : 0.1 (pvr 8003 0101)
> -bogomips       : 36.73
> +bogomips       : 73.47
>   timebase       : 18432000
>   platform       : PowerMac
>   machine                : PowerBook6,5
> 
> It seems that with a more recent kernel, bogomips have doubled (both 
> with CONFIG_HZ=1000, if this matters). How comes?

Not sure what the bogomips are about nowadays but they are irrelevant on
most macs as we use the timebase for short delays.

Ben.