ChessUSA.com TalkChess.com
Hosted by Your Move Chess & Games
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

cache alignment of tt
Post new topic    TalkChess.com Forum Index -> Computer Chess Club: Programming and Technical Discussions Flat
View previous topic :: View next topic  
Author Message
Robert Purves



Joined: 15 Feb 2010
Posts: 155
Location: New Zealand
PostPost subject: Re: cache alignment of tt    Posted: Mon Mar 12, 2012 4:10 am Reply to topic Reply with quote
You don't need a profiler. The best and simplest method is time-to-depth, obtained with a few lines of test-harness code in main(). Reproducibility is greatly enhanced by taking the fastest of 3--5 searches.

The combination of alignment and prefetching gives my engine a speedup of about 1%.
Code:
__builtin_prefetch( &sTT[hashCode & sTTIndexMask] );
Back to top
View user's profile Send private message
Display posts from previous:   
Subject Author Date/Time
cache alignment of tt Daniel Shawul Sun Mar 11, 2012 10:22 pm
      Re: cache alignment of tt H.G.Muller Sun Mar 11, 2012 10:39 pm
            Re: cache alignment of tt Daniel Shawul Sun Mar 11, 2012 11:06 pm
      Re: cache alignment of tt Jon Dart Mon Mar 12, 2012 12:43 am
            Re: cache alignment of tt Daniel Shawul Mon Mar 12, 2012 2:53 am
            Re: cache alignment of tt Vincent Diepeveen Thu Mar 15, 2012 8:12 pm
      Re: cache alignment of tt Robert Purves Mon Mar 12, 2012 4:10 am
            Re: cache alignment of tt Daniel Shawul Mon Mar 12, 2012 4:49 am
      Re: cache alignment of tt Robert Hyatt Mon Mar 12, 2012 5:21 am
            Re: cache alignment of tt Ricardo Barreira Mon Mar 12, 2012 8:25 am
                  Re: cache alignment of tt Robert Hyatt Mon Mar 12, 2012 3:54 pm
                        Re: cache alignment of tt Alvaro Cardoso Tue Mar 13, 2012 12:33 am
                              Re: cache alignment of tt Robert Hyatt Thu Mar 15, 2012 2:15 pm
                                    Re: cache alignment of tt Rémi Coulom Thu Mar 15, 2012 4:42 pm
                                          Re: cache alignment of tt Robert Hyatt Thu Mar 15, 2012 5:03 pm
                                                Re: cache alignment of tt Daniel Shawul Thu Mar 15, 2012 5:08 pm
            Re: cache alignment of tt Daniel Shawul Mon Mar 12, 2012 12:49 pm
Post new topic    TalkChess.com Forum Index -> Computer Chess Club: Programming and Technical Discussions

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum




Powered by phpBB © 2001, 2005 phpBB Group
Enhanced with Moby Threads