2009/6/7 Hideki Kato <[email protected]>: > Łukasz, is the program multi-threaded?
Is is single threaded and 32-bit. > > Corei7 920 runs about 7% slower than core2 at the same clock. > Possibly due to the optimized code for core2? That is my belief. I will reconsider buying i7. Thank you for your benchmarks. Lukasz > > Experimental results follow. > > On a 3 GHz (333 x 9) core2 Q6600: > 200000 playouts in 1.49209 seconds > 134.04 kpps > 44.6798 kpps/GHz (clock independent) > 105316/94359 (black wins / white wins), > > Average of the middle 10 of 12 runs is 44.79506 kpps/GHz. > Raw data: 44.6798, 44.7951, 44.8276, 44.8207, 44.8398, 44.6887, > 44.8317, 44.8491, 44.782, 44.7216, 44.7983, 44.8451 > > On a 3.6 GHz (180 x 20) corei7 920: > 200000 playouts in 1.34808 seconds > 148.359 kpps > 41.2643 kpps/GHz (clock independent) > 105316/94359 (black wins / white wins), > Average of the middle 10 of 12 runs is 41.57643 kpps/GHz. > Raw data: 41.2643, 41.9025, 41.3732, 41.5582, 41.1666, 41.4887, > 41.7724, 41.9751, 41.6362, 41.787, 41.269, 41.7128 > > On a 3 GHz (150 x 20) corei7 920: > 200000 playouts in 1.6001 seconds > 124.992 kpps > 40.1661 kpps/GHz (clock independent) > 105316/94359 (black wins / white wins), > Average of the middle 10 of 12 runs is 41.79165 kpps/GHz. > Raw data: 40.1661, 41.8626, 41.8366, 41.687, 41.7099, 41.9556, > 41.3053, 41.9335, 41.8255, 41.8838, 42.077, 41.9167 > > With hyper threading on (3 GHz 920): > 200000 playouts in 1.5881 seconds > 125.937 kpps > 41.9898 kpps/GHz (clock independent) > 105316/94359 (black wins / white wins), > Average of the middle 10 of 12 runs is 41.82533 kpps/GHz. > Raw data: 41.9898, 42.0318, 42.0503, 41.947, 40.6079, 41.7033, > 42.0283, 41.8386, 41.5187, 41.8013, 41.9114, 41.4831 > > Hideki > > Łukasz Lew: <[email protected]>: >>2009/6/6 Hideki Kato <[email protected]>: >>> Hi Lukasz, >>> >>> I have five core2 and one i7 computers running at home. I prefer i7, >>> though don't have exact measure. >>> >>> The most important difference is the memory interface, ie, core2 >>> uses a obsolete common bus (FSB) while i7 uses p2p connection with >>> an internal (on chip) memory controller. Also, core2 uses DDR2 >>> (obsolete) and i7 uses DDR3 memory modules. >> >>I know the technical differences. I just wonder do they matter in >>practice of computer-go >> >> >>> >>> On overclocking, i7 performs better. i7 920 (cheapest model) runs at >>> 3.6 GHz (C0 stepping; recent D0 is said at 4 GHz) while core2 Q9550 >>> (middle range model) runs at 3.2 GHz, with a rather silent air >>> cooling. >> >>thanks. >> >>> >>> If you have a benchmark program please send me. Ubuntu Linux or >>> WIndows XP is fine. >>> >> >>http://www.mimuw.edu.pl/~lew/engine.gz >>please run with: >>./engine --seed 123 -b >> >>FYI it tests only the processor, not the memory and is optimized for core2. >> >>> Ah, I don't prefer two sockets SMP computers since we will have hexa >>> and octa core chips soon (next year? I don't remember). >> >>I agree. >> >>> >>> Hideki >>> >>> Łukasz Lew: <[email protected]>: >>>>Hi >>>> >>>>I have few days to buy a computer for Monte-carlo Go program. >>>>There is not enough money for a multi processor, so I have to decide between >>>>- core i7 2.66 GHz >>>>- some core2 quad >>>>both subjected to over-clocking. >>>> >>>>Have you observed that Monte-Carlo Go program is faster on core i7 >>>>than on core2 ? >>>> >>>>Lukasz >>>>PS >>>>Or have you found some cheap solutions for shared memory dual processor? >>>>_______________________________________________ >>>>computer-go mailing list >>>>[email protected] >>>>http://www.computer-go.org/mailman/listinfo/computer-go/ >>> -- >>> [email protected] (Kato) >>> _______________________________________________ >>> computer-go mailing list >>> [email protected] >>> http://www.computer-go.org/mailman/listinfo/computer-go/ >>> >>_______________________________________________ >>computer-go mailing list >>[email protected] >>http://www.computer-go.org/mailman/listinfo/computer-go/ > -- > [email protected] (Kato) > _______________________________________________ > computer-go mailing list > [email protected] > http://www.computer-go.org/mailman/listinfo/computer-go/ > _______________________________________________ computer-go mailing list [email protected] http://www.computer-go.org/mailman/listinfo/computer-go/
