Author: Robert Hyatt
Date: 07:36:02 03/24/02
Go up one level in this thread
On March 24, 2002 at 04:09:49, Slater Wold wrote: >On March 24, 2002 at 00:00:30, Robert Hyatt wrote: > >>On March 23, 2002 at 17:21:10, Slater Wold wrote: >> >>>On March 23, 2002 at 17:07:53, Sune Fischer wrote: >>> >>>>On March 23, 2002 at 15:58:19, Tom Kerrigan wrote: >>>> >>>>>On March 23, 2002 at 09:53:13, Dan Andersson wrote: >>>>> >>>>>>As seen in: >>>>>>http://www.aceshardware.com/read.jsp?id=45000312 >>>>>>A chess program using traditional work scheduling algorithms will not be using >>>>>>the Hammer architecture at its most effective. But it won't be all that bad due >>>>>>to the HyperTransport tunnels. And high bandwidth memory. A funny consequence of >>>>>>the architecture is that SMP multiprocessing is achieved by having software >>>>>>drivers. >>>>> >>>>>I don't know what you mean by "traditional work scheduling algorithms" but the >>>>>Hammer will be great for running chess programs out of the box. The only way to >>>>>make it faster would be to recompile the programs for x86-64, which reportedly >>>>>yields a 10-15% performance gain. >>>> >>>>The Hammer is a 64-bit chip, I expect it to bring a lot more than just 10-15% in >>>>chess, more like 100-150% for those progs with bitboards. >>>> >>>>-S. >>> >>>You're dreaming. Alpha's don't get *anywhere* near that kind of gain. More >>>like the 10-15% that Tom said. >>> >> >> >>Depends. Tim Mann produced > 1M nodes per second on a 600mhz alpha. NO >>600 mhz Intel will come within 1/2 that total... > >Well I proved it before, 1 alpha node does NOT == 1 x86 node. > >He was getting a *much* better score on the WAC suite than I was, running neck >and neck NPS. On what processors? I posted the tail end of the WAC run from a single and dual processor 21264 at 600mhz. The single got .8M nodes per second, the dual got 1.2M. That dual 600 is faster than my quad 700. Which means it is more than 2x faster than a single cpu. On my 550mhz xeon, crafty hit 202K nodes per second. Same version of the program, same everything else... > >Think he was getting 7+ more correct answers on the suite than I was. And I >think I was beating the Alpha by like 150k nps. (Same version of Crafty.) > >> >> >> >>>> >>>>>-Tom
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