Author: Tom Kerrigan
Date: 19:35:19 06/19/02
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On June 19, 2002 at 20:45:33, Keith Evans wrote: >Is there an easy way to compare a 1.4 GHz P3 to a 1 GHz McKinley and see where >this Crafty performance increase is coming from? I'm not at all familiar with >McKinley, but would it be possible to run a version of Crafty compiled for >32-bits on a McKinley and compare that to a Crafty compiled for 64-bits on >McKinley? Is this a dumb idea? If this isn't possible, then it's going to be >difficult to tell where the performance gain is really coming from. It's extremely possible. You can make a bitboard class that contains two 32-bit ints and overload all the int operators and run it on a 64-bit chip. I suggested this to Bob last time we had this argument and his response was that Crafty is written in C, not C++. (Apparently renaming his source files from .c to .cpp and writing this simple class is too much work.) Perhaps somebody else with access to a 64-bit chip and a modicum of motivation could perform this experiment. -Tom
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