Michael Kraemer wrote:
> hello group,
>
> I have a Power4 (p630) and a Power5 (p520) box.
> Running some number crunching code, compiled in "common" mode,
> reveals that the relative performance gain
> is hardly above the ratio to be expected from the GHz ratio (1.2 vs 1.5).
> Shouldn't one expect a bit more "intrinsic" gain when
> going from P4 to P5 ?

Can you explain in a little more detail ... p630 4 Way ? p520 2 Way ?
Running AIX 5.3 ? smt on/off ?

What are the exact models you are using? as the p630 1.2GHz rPerf
ranges from around 2.5 to 8.0'ish depending on model and the p520
ranges from approx 3.0 to 9.0 ish

Rgds
Mark Taylor