Author: Matthew Hull
Date: 09:20:42 05/02/05
Go up one level in this thread
On May 02, 2005 at 12:03:56, Daniel Pineo wrote: >On May 01, 2005 at 23:27:40, Eugene Nalimov wrote: > >>On May 01, 2005 at 21:01:17, Daniel Pineo wrote: >> >>>On April 30, 2005 at 20:22:22, Christos Gitsis wrote: >>> >>>>On April 29, 2005 at 16:26:28, Uri Blass wrote: >>>> >>>>>I read that Shredder9 for 64 bit is released and my question is what is the >>>>>speed difference that program earn from compiling for 64 bits when you need also >>>>>64 bit window to run it. >>>>> >>>>>Can somebody tell me about the speed gain in nodes per second of all the free >>>>>source code programs including programs that do not use bitboard like tscp or >>>>>fruit and bitboard programs like Crafty. >>>>> >>>>>Uri >>>> >>>>I have tested two different versions of Crafty-19.19 using my Athlon 64 3400+: >>>> >>>>- Under 32-bit Windows XP the fastest version I could find in the Internet >>>>(among about 8 different executables) runs at an average of about 1.5 million >>>>NPS and has reached a maximum of 1.7 MNPS. >>>> >>>>- Under 64-bit Gentoo Linux it runs at an average of 2.2 million NPS and has >>>>reached a maximum of 2.48 MNPS. >>>> >>>>The increase in speed is 40~50%. >>>> >>>>I hope this helps >>> >>> >>>Don't you think switching from windows to linux might have something to do with >>>that 40~50% increase? >> >>Last time I asked AMD people to check, 64-bit Visual C generated better code >>than 64-bit GCC 4.0. > >I would expect so, microsoft makes quality stuff nowadays. > > >> >>So on 64-bit Windows increase would be even larger. >> >>Thanks, >>Eugene > >I was just pointing out that giving the nps increase from 32bit windows to 64bit >linux doesn't really pinpoint the benefit of goint to 64bit since some of the >increase may be due to the OS change. I think the OS has very little to do with it. The compiler has a lot to do with it and the program itself in terms of it's ability to profit from 64-bit architecture. AFAIK, bitboard programs tend to benefit more than others. The OS counts for next to nothing by comparison. Matt > >- Dan Pineo
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