Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Programming question.

Author: Inmann Werner

Date: 15:14:36 03/19/99

Go up one level in this thread


On March 19, 1999 at 18:08:02, Dann Corbit wrote:

>Actually, something very strange is at work here.  Now that I look closely, the
>data objects are the same size.  Are you sure that you have the optimization
>settings unchanged?  Maybe you used a debug build for timing on the P90?  Did
>you change the instruction mix?
>
>My previous remarks assumed that you expanded the tables.  Since they are the
>same size, it is not the memory I/O that is a problem.
>
>Both lookups should be of identical speed.

I agree!!!

I am sure. I changed nothing. Only the definition (char * ...) and the mallocs.
All the rest is the same code. But I have all optimizations on in both variants.
The only thing, I can think is, that there is problem with prozessor caching.
In same way, the ram must be organized different. The traffic is the same.
But 30% disturbs me, although P90 is a old machine.

Werner



This page took 0 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.