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SubjectRe: BogoMIPS revisitied...MMX

Here is an interesting array:

AMD K5-100: 199.07 BMPS
INTEL P-60: 23.96 BMPS
Cryix 6x86 P150+ (at 120MHz): 52.33 BMPS
INTEL 486-DX266: 33.08 BMPS.

Why is the AMD 100MHz CPU 4x faster (in BogoMIPS) than a Cyrix running a
20% higher clock speed? I would say that the AMD CPU Microcode is
optimized more toward the type of instruction that the bogomips loop
executes. Why is it nearly 10x faster than the Intel chip?

I dunno, but I think I will buy more AMD chips ;)



On Tue, 17 Mar 1998, Perry Harrington wrote:

> Ok, I wouldn't ask this question if I didn't think that there was
> more going on here.
>
> I have a P100 Toshiba laptop. It's your average P100 mobile 2.9v
> processor. I recently purchased a P233MMX as well.
>
> The thing that baffles me is this:
>
> I know that the bogomips loop is a >small< and tight loop of 3 or
> 4 instructions. Why is it that my P100 spits out something like
> 39.19 BogoMIPS and my P233MMX spits out 466.15 bogomips? I know
> that the Pentium had some issue with this, being that a standard
> 486 executed *that* particular loop faster.
>
> So, why such the HUGE difference?
>
> --Perry
>
> --
> Perry Harrington Linux rules all OSes. APSoft ()
> email: perry@apsoft.com Think Blue. /\
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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>
>

George Bonser
Just be thankful that Microsoft does not manufacture pharmaceuticals.
http://www.debian.org
Debian/GNU Linux ... the maintainable operating system.


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