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Subject: Re: Crafty and NUMA

Author: Uri Blass

Date: 05:12:55 09/03/03

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On September 03, 2003 at 02:24:00, Gian-Carlo Pascutto wrote:

>On September 02, 2003 at 22:34:49, Robert Hyatt wrote:
>
>>>Been working a year fulltime now :)
>>>
>>
>>So?  It took you over a year to get your parallel search working.  It took
>>me weeks.
>>
>>:)
>
>In all fairness, he did a full DTS implementation, including rewriting the
>program to a nonrecursive search, while you took an easy way out.

I do not understand the need for non recursive search.

I think that non recursive search simply limit your possibilities for future
developement because the code is ugly and you need to write almost the same
function again and again.

If you want to change something in the search rules then you need to change your
program in a lot of places.

I guess that you need to write code for every possible depth that you get and in
order to let your self to do extensions you need to write code for
depth 10,depth 10 after one extension,depth 10 after 2 extensions, and you also
need to limit the number of extensions at specific depth.

You also limit your possibilities to extend because
you cannot decide to extend more than one ply without modifying your code.

<snipped>
>
>Diep's parallel performance does seem to be better than what you and I are
>getting.

I have no idea about Diep's parallel performance.
I do not know about a single game of Diep on the new machine and I guess that we
need to wait for november to see its performance.

Uri



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