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Roadrunner Supercomputer using 12,960 CELL Processors Hits 1 PetaFlop ?(1000 TeraFlops) of double-precision FP Performance
In comp.sys.ibm.pc.hardware.chips Cydrome Leader wrote in part:
I find it unlikely they still don't know how nuclear weapons work, especially considering they're mature technology and they've been around for decades. A two-stage thermonuclear warhead is a surprisingly complex device -- look up Teller-Ulam. To work properly, the design has to transfer enough light energy to ignite and burn the fusion secondary before the fission primary shock waves disassemble the device. There's _lots_ to simulate here in at least 2D over many timeslices. Yes, we know how to make them go bang. Just follow the recipe. But we don't always know the critical parts of that recipe, and what parts we could change. In general, the whole field of Finite-Element computation is still short of cycles and can swallow everything available. Multi-CPU clusters are still being built. Imagine being able to simulate vehicle collisions -- designers would be able to determine where metal could be added or other changes to improve occupant survival. -- Robert |
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Roadrunner Supercomputer using 12,960 CELL Processors Hits 1PetaFlop ?(1000 TeraFlops) of double-precision FP Performance
Robert Redelmeier wrote:
Multi-CPU clusters are still being built. Imagine being able to simulate vehicle collisions -- designers would be able to determine where metal could be added or other changes to improve occupant survival. No need to imagine this: We have operated a Linux cluster for nearly 5 years now that Hydro (the Aluminium company) uses to simulate the energy transfer/structure deformation that happens when a (sports) car using one of their aluminium frames with integrated "crash box" structures get into an accident. Yes, it is a _lot_ cheaper than running real crash tests, even though you still have to verify the theoretical results before the car will be certified for road use. Terje -- - "almost all programming can be viewed as an exercise in caching" |
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Roadrunner Supercomputer using 12,960 CELL Processors Hits 1PetaFlop ?(1000 TeraFlops) of double-precision FP Performance
On Jun 13, 11:10 am, Terje Mathisen
wrote: Yes, it is a _lot_ cheaper than running real crash tests, even though you still have to verify the theoretical results before the car will be certified for road use. Cost isn't the real advantage. You can't instrument an experiment the way that you can a simulation. The disadvantage, of course, is that you have mountains of information and sometimes no clue as to what to do with it. The science, the insight, the talent, and everything else worthwhile are in finding those clues and not in the petaflops or exabytes. Robert. |
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