Computer Chess Club Archives

Search

Terms

Messages

Subject: Re: How do you insure that Hash Table entries are correct?

Author: Larry Griffiths

Date: 19:40:05 09/16/00

Go up one level in this thread

On September 16, 2000 at 19:25:56, Robert Hyatt wrote:

>
>This last thing suggests that maybe your hash keys are not as random as they
>should be.  I have done some hash testing and I don't see any "holes".  IE I
>can quickly write over nearly *every* position.  I detect this by simply running
>a search, then counting how many entries are from this search, vs previous
>searches.  I can get 99% easily...

I did some testing and I believe you are correct, Bob.

I changed the following in my code...

//					hrandom=random(HASHTABLEENTRIES);
					hrandom=random(4000000000);

I dont know why I was using HASHTABLEENTRIES (the number of) as my
input to random, but changing it to 4000000000 made the bands go away.

Thanks Bob :)

Larry.

This page took 0.01 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.