Author: Dann Corbit
Date: 12:39:00 05/02/05
Go up one level in this thread
On May 02, 2005 at 12:20:42, Matthew Hull wrote: >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. I think for sure that this is the correct analysis. I would be interested to know the version of GCC used. I have heard interesting projections about GCC 4.0, but the version I built has problems finding the include files so I cannot use it.
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