Author: fca
Date: 11:16:03 08/12/98
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On August 12, 1998 at 11:46:18, Mark Young wrote: >On August 12, 1998 at 11:13:06, fca wrote: > >>This has arisen from a post by Mr Langrath elsewhere. >> >>If multitasking two chess programs on one PC, and playing a game between >>them, how does one "fairly" allocate resources between them? >> >>I accept there is no question of properly deducing playing strength in such a >>scenario. That is NOT the objective, therefore. >> >>0. What does "fairly" mean? >> >>1. RAM? >> >>2. CPU %? >> >>3. Idle / background priority? >> >>4, Thinking Time set on program? >> >>and especially >> >>5. Should permanent brain be switched off on one or both programs? >> >>Ideas on how to arrive at the answers, please, or better still - the answers >>themselves. :-) >When I test programs on one computer I used a CPU meter, so I would know if one >of the programs was taking any cpu. Some programs will, even with permanent >brain off. Programmer guesses a competitor may be running... So keeps reading the keyboard intensively, or doing some other hogging. They are a sly lot. Of course motives cannot be attributed for sure! ;-) > Or some programs like Nimzo98 do not have permanent brain option. In >either case what you need to do is open up an option box in the program like >level or database or something like that. Check the cpu meter till you find >something that stops the program for taking any cpu.Then have the other program >think while the option box is still opened in the other. Good suggestion! BTW, I suspect (by virtue of solving time variation, not attributable to hash table effects as program probably had none and anyway the behaviour was reproducible from clean start-up) one program of starting thinking even in setup position, as you enter the pieces, once kings are on the board. It was for the ZX Spectrum, so I cannot check any more. It either assumed WTM or needed that input of Who to Move before commencing Setup! Of course, each time you added/subtracted a piece, it reinitialised thinking. Cunning way of improving solving times. Re all the other points, Mark? Kind regards fca
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