Re: [bgl-discuss] Comparison between BGL nodes and standard PPCs

[Andrew Siegel <siegela@xxxxxxxxxxx>]

even though you're not using the second fpu, it's still a little worse 
than is typical. This is likely because of how the math intrinsics are 
implemented -- do you have a significant # of sqrts, logs, etc?

On Thu, 10 Mar 2005, Donald Sinclair wrote:

> What are the major differences other than the presence of communication
> hardware between the BGL processors and other Power PC chips, Power 3, for
> example? I ask, since despite the fact that both this chip and the
> Power 3 have 2 floating point units and the rest of the unit has the
> Power PC architecture, and I use the same compiler (xlf), the performance
> I get from the 700 MHz BGL processor is less than half what I can get from
> a 375 MHz Power 3, even when I use the -qarch=440d.
>                                    Don Sinclair
> 
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