Matt Goodrich wrote:
>
> I have just upgraded a Proliant 2500 from dual PPro 200's to dual Pentium II
> 333 overdrive processors. ...
> Now before I upgraded, I was running double check's on 2 exponents, 668xxxx.
> I was getting about .515 second iteration times.
> Now that I have upgraded, I am only getting .448 second iteration times.
Might it just be the effect of slower cache? As I recall, the numbers were:
P Pro 256 or 512K one CPU clock to deliver data
P II 512 K two
Celeron 128 K one
and on some tasks, Celeron outperforms P II at the same clock because of
this.
If the process is cache-bound and key data fits in both caches, this gives
about the right numbers. P II cache runs at 333/2 which is to 200 roughly
as .448 is to .515.
Alternately. do you just need a differently optimised version of the code
to get the best out of your P IIs?
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