Author: Uri Blass
Date: 04:07:43 08/18/03
Go up one level in this thread
On August 18, 2003 at 06:47:15, Sune Fischer wrote: >On August 18, 2003 at 06:36:14, Uri Blass wrote: >>>>Well Sune, if it was that easy to just take 'em... >>>>Starting with SMP complicates your program by a factor x and introduces new >>>>fresh bugs. That goes for every little improvement and change you are going to >>>>do. You first have to think about how it affects your SMP logic even if it's >>>>"foolproof" written with good design. You always have to keep it ín mind and >>>>your debugging is even harder than before. More complicated and more bug >>>>intensive = 50 ELO. Hmmm I think I'll wait. If it was >51 I would go for it ... >>>>:-) >>>> >>>>/Peter >>> >>>That might be true, I don't have much experience with it, but I think it should >>>be manageable. >>> >>>Probably the primary argument not to do it, is that not many users have duals, >>>so from commercial point of view perhaps indeed it is better to spend the time >>>on something else which will benefit all. >>> >>>However, for the die hard fan who just wants the strongest kit (HW+SW), dual is >>>the way to go. >>> >>>-S. >> >>I am not sure. >> >>If you believe that at the same time that you implement dual you may implement >>instaed of it some better search algorithm than dual is not the way to go. > >You arugment seem to require a never ending stream of improvements to the search >algorithm, and at the same rate as it would take to make the program parallel. > >While this is no doubt true for most amateur engines for quite a while to come, >I'm not sure it is the case for the pros who has already been undergoing >optimizing procedures for decades. > >>Remember also that dual also may make slower the progress after you implement it >>because you may need to care about more possible bugs. > >I think it is matter of habit, you can get used to thinking parallel like you >can get used to so many other things. Weird pruning rules can certainly also >make life misserable ;) Or doing other things that prevent weird pruning rules may make the life miserable because you cannot use the weird pruning rules. > >Anyway, if the program is designed from the beginning to go parallel, I think it >is doable, just look at Crafty and Amy :) > >-S. you may be right but I did not design movei to be parallel from the start and I prefer to do what I find more interesting. Doing the program parallel is not something that interests me. This is a good reason to have more than one programmer in a team. One programmer can work on the code and tell the partner about changes and the second programmer can work about doing the thing parallel. At this point most of my ideas are still not used in movei and I believe that I have a lot of good ideas. Doing the program parallel is not one of them. Uri
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