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

[Donald Sinclair <dks@xxxxxxxxxxx>]

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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