Re: Better performance with 2.6

["Richard B. Johnson" <root@chaos.analogic.com>]

On Tue, 2 Mar 2004, Chris Meadors wrote:

> On Tue, 2004-03-02 at 14:10, Richard B. Johnson wrote:
>
> > Are you talking about BogoMips??  This is just how many twinkies
> > you can eat in a second with the current coding style in the
> > short timer counter. It has absolutely, positively, nothing to
> > do with "CPU capacity".
>
> He probably meant MHz.  But the same thing.  What difference does a
> tenth of a MHz matter?
>
> I do have a question about BogoMIPS.  I know they don't mean anything,
> but why on my Opteron system with two processors that read the same on
> the cpu MHz line, do my bogomips vary so much?
>
> processor       : 0
> cpu MHz         : 1393.980
> bogomips        : 2736.12
>
> processor       : 1
> cpu MHz         : 1393.980
> bogomips        : 3145.72
>

Because the loop-counter is called at different times, therefore
the cache has different stuff in it.

Cheers,
Dick Johnson
Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
            Note 96.31% of all statistics are fiction.