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Subject: Crafty vs. Hyda-Scylla. Bob, could this work?

Author: Keith Ian Price

Date: 09:33:24 04/20/05



IBM recently came out with their Power-5 module:

http://static.userland.com/weblogsCom/images/wallyswisdomwarehouseweblogscom/8XPower5MCM.jpg

This module has 4 dual-core multi-theaded Power PCs similar to the ones used in
the Mac G5. That makes for a total of 16 virtual cores, and IBM has a system
that ties 8 of these modules together with a 4GB/s bus for a total of 128
virtual cores. The other four chips in the module are 4x36MB L3 cache. Since
Crafty already gets about 1500 kns on a fast processor, and the mult-threading
on a core offers about a 15-20% speedup, Crafty would likely exceed 100,000 kns
on a full system, especially if the hash tables could be kept in the L3 cache.
First, would it be possible to run a 128-thread version of Crafty? If so, do you
suppose that IBM might be interested in affording you the use of one of these,
as a Professor of Computer Science, to have a match against the self-proclaimed
successor to Deep Blue? I imagine they would get some good publicity having an
off-the-shelf IBM computer beat the specially designed chess computer in a
match. What do you think?



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