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SubjectRe: BogoMIPS revisitied...MMX

Well.. What bogomips do tell you is that differnt processors optimize
differntly..

Two computers: P233 and PII-233 both running the same Linux kernel,
P233-400bogos PII233-200bogos.. DES2 client ran 15% faster on the P233
over the PII233.. :)

On Wed, 18 Mar 1998, Gerard Roudier wrote:

>
> On Tue, 17 Mar 1998, George Bonser wrote:
>
> > 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.
>
> This BogoPENIS^H^H^H^H^HMIPS comparison shows how fast these processors
> are able to execute some useless code.
> This perhaps speeds up M$ O/Ses ... ;)
>
> > 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?
>
> Seems the AMD K5 branch prediction algorithm and execution units are very
> fortunate with the Bogo loop.
> But the normal Pentium and the Cryix (you did this fine mistake above :-)
> P150+ seem to have great problem to predict the Bogo loop branch. Probably
> just too lazy rabbits. :)
>
> > I dunno, but I think I will buy more AMD chips ;)
>
> Indeed, you should, if the Bogo MIPS result is your preferred Linux
> application. ;)
>
>
> Gerard.
>
>
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