Author: Vincent Diepeveen
Date: 17:29:14 09/19/03
Go up one level in this thread
On September 19, 2003 at 17:48:46, Mikael Bäckman wrote: >On September 19, 2003 at 15:00:55, Vincent Diepeveen wrote: > >>On September 19, 2003 at 11:48:09, Mikael Bäckman wrote: >> >>>On September 19, 2003 at 11:14:29, Vincent Diepeveen wrote: >>> >>>>Hello, >>>> >>>>I'm looking for positions to search very deep with a cpu or 500 which are >>>>interesting to search deep. Seemingly a whole machine must get reserved for DIEP >>>>world champs 2003. The NWO/NCF perhaps needs to pay for the cpu hours also >>>>during the night says SARA (there is 7 organisations involved and i have written >>>>at least 1 page for each processor to get it so i won't even start quoting all >>>>the organisations involved). >>>> >>>>Most jobs run like 2 weeks or so at say for example 32 processors, so all those >>>>jobs cannot get started trivially in the night. >>>> >>>>Anyway more negotiations will be there, because the world champs like this will >>>>cost 80000 cpu hours. >>>> >>>>This is all internal talks. In case any of such scenario happens or even between >>>>rounds when diep finishes sooner its games, there sometimes is a few hours left >>>>to run diep at 500 cpu's at for example 1 position each run. >>>> >>>>that's 250Ghz with around 200GB hashtables in total. >>>> >>>>So this allows some massive deep calculations. I'm looking for cool positions to >>>>try. >>>> >>>>Please don't mention the openings position, i'm already using that now and it >>>>isn't very interesting at all to search that one deep. >>> >>>How deep have you searched the opening position and what is the PV you get? >> >>You can search the opening very deep if you want to. I have had diep versions in >>the past where i have put a big bonus for center pawns and a king being safe >>behind a shelter. So it wants to castle badly then and put pawns badly in >>center. > >Yes, I know. :) I was merely interested in what the 'normal' 500 cpu version >thinks about the position. I cannot test at 500 processors currently. I can 22-30 november only. It's too busy to test before that. Right now it is running for example a weather simulation at 258 processors (already for 3 months or so) generating a 10TB database. So any test at > 100 cpu's is out of the question. And if i would it would be fore a few minutes. I saw however in a few outputs the real power in such machines, and that's where they normally get used for, is for real long term simulations at many cpu's. The weather simulations is a very good example. 350000 cpu hour they throw into it, but i get impression it will be more in the end as they have bugfixed a few things like the height of the seawater had a big bug in the simulations. Note this software is international. This supercomputer isn't the only one running this software for this simulation. There is many around the world running and even more monitoring the results. >/Mikael > > >> >>It gets depths like 22 ply easily then. >> >>So openings position is not so interesting simply. Big bonuses guiding the >>development in a clear way are more important than the number of CPU's there in >>itself is. >> >>But still depths are big yes :) >> >>> >>> >>> >>>>feel free to email to me about this: diep@xs4all.nl >>>> >>>>Best regards, >>>>Vincent
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