Author: Mark Young
Date: 06:56:50 07/02/05
Go up one level in this thread
On July 01, 2005 at 22:27:02, Eugene Nalimov wrote: >On July 01, 2005 at 21:38:28, Robert Hyatt wrote: > >>... >> >>My point was that Hydra is most _certainly_ not some new level of computer chess >>as stated by Adams. I wouldn't argue against it being the best computer chess >>entity at the moment. But it is absolutely _not_ head and shoulders above >>others. The advantage I have is that I have a lot of experience with parallel >>and distributed search, and know the losses that a distributed search entails >>compared to a pure SMP approach. And even if they are currently reaching 200M >>nodes per second, which I somehow doubt given the FPGA numbers they have >>published in the past, that is not _that_ much faster than other readily >>available hardware. I've seen numbers well beyond 20M for Crafty on a quad >>dual-core opteron, for example. I've seen numbers more than double that on >>other machines I can't really mention at the moment. So they are not _that_ far >>beyond today's programs. Clearly Adam's comments are based on some other >>reality or understanding that is not based on factual analysis. > >Today you can buy Itanium2 64-CPU system at >http://www.hp.com/products1/servers/integrity/superdome_high_end/ > >Last time I measured Crafty run at ~1.5Mnps on one Itanium2 CPU. So with some >additional work (avoid cache conflicts, maybe introduce smaller local hash to be >probed at the last ply or two) Crafty can hit ~100Mnps on such beast. > >For less than $40k you can buy reasonable configured 8 sockets / 16 cores >Opteron system. For example take a look at >http://www.pcsforeveryone.com/product_info.php?cPath=1967&products_id=14101&customize=true > >Crafty should run at ~30-35Mnps on such system. > >Both those systems are NUMA, not clusters, so search should be more efficient. > >Thanks, >Eugene I have a question. What is better, and by how much. A AMD Athlon 64 X2 Dual-Core ... Or a Dual Opteron system? My quess would be the dual opteron would be a bit faster, but the dual-core would be cheaper. What is the best bang for the buck?
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