Author: Dann Corbit
Date: 10:07:53 01/02/02
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On January 02, 2002 at 12:51:49, Gian-Carlo Pascutto wrote: [snip] >Deep Fritz appereantly doesn't get any kind of significant speedup on >dual hardware, so that's not much of an argument. For some positions it does not, and for some it does. I suspect there will be an improved version soon -- maybe for the contest. What about Junior? Do we see the same effect? >I don't think the Tigers would need a dual to be competitive, speed >disadvantage or not. They haven't in the past and I dont see why >it should be the case now. At some point they will have to. If the SMP gets sorted out correctly, then on an 8-way box you could have an 7x speed disadvantage. You're playing 40/2 and all the opponents get blitz time control. >Of course, they could just join with the SMP version of Rebel >or Tiger. After all, it was already in development since way >before the last WMCCC, or at least, that is what they claimed. I am sure that it is. However, consider how long it has taken Ed to do a Windows version of Rebel. Rebel is coded in assembly language, and there will be a huge inertia to make rapid changes in framework. >Surely a programmer as good as Christophe would have had it >working by now :) If a program is not designed from scratch for SMP, it can be a monstrous task to make the conversion. If you look at 99% of the chess programs around, you will see that they have a ton of global variables. Programs like that are a pain in the rear to convert to multithreading, and also things that have a lot of static variables. The speed and accuracy of Vincent's conversion is something of a marvel. Junior is written in C++ and I suspect that conversion went fairly easily. When you code in objects, generally speaking the objects own the data object that they interact with. If CT had it working by now, we would see a version of it. That implies that it is not working yet, or at least not debugged yet. I suspect that he has other priorities but will (at some point) focus his energy on an SMP version.
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