Author: John Merlino
Date: 12:13:32 04/12/01
Go up one level in this thread
On April 12, 2001 at 14:14:14, Paul Doire wrote:
>On April 12, 2001 at 13:41:41, John Merlino wrote:
>
>>On April 12, 2001 at 11:58:05, Paul Doire wrote:
>>
>>>On April 12, 2001 at 11:23:00, John Merlino wrote:
>>>
>>>>On April 12, 2001 at 07:07:47, Daniel Chancey wrote:
>>>>
>>>>>Could you explain the problem of hash clearing again?
>>>>>
>>>>>Castle2000
>>>>
>>>>First, you should know that the problem will go away with the next (and final)
>>>>patch.
>>>>
>>>>Second, it's pretty simple. The hash table is cleared out at the beginning of
>>>>every search. On my PIII-600, it took about 1/2 second (by my VERY ROUGH
>>>>estimations) to clear a 32MB hash table. Therefore, in a G/5 that goes 80 moves
>>>>(for example) a Chessmaster personality with a 32MB hash table will lose 40
>>>>seconds on its clock for nothing, since 31MB of the hash table is completely
>>>>wasted.
>>>>
>>>>jm
>>>
>>>Hi John,
>>>Interestingly enough,CM Default doesn't do as well against GT-2
>>>on same pc matches. However CM KKND 32H does defeat GT-2 and CM Default at least
>>>50-60% of the time (entertainment games only... OK cruel posters).
>>>Do you think that somehow the custom personality CM KKND 32H clears it's hash
>>>tables better than Default? It doesn't make sense but the results seem to make
>>>it appear that way.Why else would CM KKND have better results?
>>>
>>>Thanks for your time,
>>>Paul
>>
>>Unknown, since I do not have enough information to answer the question. Are we
>>still talking about G/5 games? How many games have been played and what's the
>>actual tally (W/L/D)?
>>
>>Didn't your other post say that the default soundly beat KKND? I'm confused....
>>
>>jm
>
>Hi John, Thanks for replying,
>
>My other post entitled "CM8K personality tourney results-120 games" G/5
>The results were for the top two as follows :
>CMKKND 32H +10=8-6 14
>CM Default +7=12-6 13
>
>although overall score was within one, I thought CM KKND 32H win ratio was
>more impressive than CM Defaults, and it does much better against GT-2.
Ok, I understand (I think). I was confused by the post where you said:
--------------
Hardware: 541 Mhz celeron 128 mb ram win 98se
G/5
After reading John Merlino's post about excessive hash clearing under the
current patched version of CM8000, I decided to try the top two candidates from
my last tourney with only one meg hash each.
As you can see the results this time are much different.
win draw loss games score
CM Default 22 18 10 50 31
CM KKND 1 MB Ram 10 18 22 50 19
--------------
That's why draws are scored as well. The difference was one point, even though
the KKND personality actually won 3 more games. Notice that they both LOST the
same number of games (at least you get SOMETHING for a draw).
However, there's no way that personality settings can affect the speed at which
the hash table clears. It automatically happens at the beginning of every move,
regardless....
jm
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