Author: Robert Hyatt
Date: 08:52:28 03/18/03
Go up one level in this thread
On March 17, 2003 at 16:24:12, Matthew White wrote: >On March 17, 2003 at 16:16:06, Robert Hyatt wrote: > >>On March 17, 2003 at 14:24:36, Matthew Hull wrote: >> >>>On March 17, 2003 at 13:26:46, Robert Hyatt wrote: >>> >>>>On March 17, 2003 at 06:43:53, Jorge Pichard wrote: >>>> >>>>>On March 16, 2003 at 21:03:07, Jason Kasick wrote: >>>>> >>>>>>Anyone heard of Polywell computers, namely the ones with the AMD 2500 chips? >>>>> >>>>>Since for Chess the CPU is what really count, here is an economical PC. >>>>> >>>>>http://computers.cnet.com/hardware/0-1018-404-20837925.html?tag=txt >>>> >>>> >>>>the CPU is not the _only_ thing to look at. Memory bandwidth is another. A >>>>machine >>>>with a MB that supports interleaved memory will be somewhat faster, but >>>>generally somewhat >>>>more expensive as well. There are other issues too, of course. >>> >>> >>>Intel uses interleaved memory. What do SGI, IBM, SUN, use on their SMP >>>machines? And for Cray, what was "crossbar"? >> >>Depends on what you mean by "Intel uses interleaved memory". There were, in the >>past, plenty of dual MBs without interleaving. >> >>Cray also used interleaving. I ran on machines with up to 32-way (32 banks) >>interleaving. >>I don't know of any super-computer that didn't/doesn't use interleaving. >> >>I don't use SMP suns. SGI interleaves. IBM also does. I'd suspect big Suns do >>this as well >>but don't have access to any. >> >> >>> >>>Matt > >The Suns do interleaving. The E10k's do according to one of Sun's marketing >pages (http://www.sun.com.au/products/hardware/highend/10000/Tour/memory.html). >I found evidence that several of the other SMP machines do as well. > >Matt The funny part of that is that their processors are so slow compared to everyone else, that interleaving is sort of like putting frosting on a cake made of cardboard. :)
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