Author: Per Jørgensen
Date: 06:05:36 11/07/05
Go up one level in this thread
On November 07, 2005 at 08:44:04, Chuck wrote: >On November 07, 2005 at 08:02:55, Ray Banks wrote: > >>On November 07, 2005 at 06:30:35, Per Jørgensen wrote: >> >>>Hi Chesscomputerfans! >>> >>>I seriously consider to buy an AMD Dual Core CPU in order to be able to arrange >>>Enginematches with Pondern ON. I got a good advice here in the Forum; buy a >>>second Hard Disk and copy the TB's on this one so that you have 2 paths to the >>>TB's located on two different Hard Disks. I do my testing in the Shredder 9 >>>surface and I can see that I can add up to 4 paths to the location of the TB's. >>>No problem. Here comes my question: How do I exactly tell an engine (it could be >>>Fruit 2.2.1, Shredder 9, Fritz 9 or anyone else who supports TB's) that it >>>should use path 1 and told the opponentengine to use path 2?? >>> >>>I hope someone can help me :-) >>> >>>Best regards >>>Per >> >>I don't think you can do that, unless an engine has it's own ini file and even >>then I'm not sure which would override which. >> >>Anyway I don't believe you need to with a single ponder on match. There is only >>one position, and there will be some commonality with what tablebases are being >>accessed, and they will be cached firstly by the value in MB you set in the GUI, >>and secondly by the O/S. That is my view, but others may well disagree > >I think you will have some contention between the two engines unless you put the >tablebases on two hard drives on separate disk controllers. This would minimize >the contention as much as I can imagine, but won't eliminate it completely. The >engine not on move would thus interfere with the engine to move. Better to use >two separate computers IMO, but personally, I don't see what's wrong with >running ponder off matches. You want to know the strength of the engines and it >seems to me that ponder off will give you a pretty reliable result. > >Cheers, > >Chuck Hi Chuck! Thanks for your advice. Maybe I will continue to test with Pondern OFF (as I have been doing for quite a long time on my current single-core CPU) but making that decision means that I'm not sure I should buy a Dual Core CPU. If you test Pondern OFF on a Dual Core CPU then you have one core working and one core "sleeping". I admit that you have the chance to do a lot of "heavy work" on your PC while testing Pondern OFF (then the "sleeping" core will be activated) but I'm not doing a lot of that. Just checking my E-mails and maybe some simple Websites. And these small activities probably won't disturb a single-core CPU testing chessengine (at least only marginally). That's why I keep on considering an AMD Athlon 64 4000+ 2,4 GHz which is cheaper and (provided you are testing Pondern OFF) faster than a AMD Athlon 64 x2 4400+, 2,2 GHz. I would be happy to get yours and others opinion of this issue. Best regards Per
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