Over at the Cray Blog, Greg Clifford writes that significant improvements have been made in the scaling of explicit structural codes such as those used in crash simulation.
Recently, Cray has been working with Livermore Software Technology Corporation (LSTC) to test and improve the scaling performance of LS-DYNA program on thousands of cores. The goal is not to scale an artificial test case but rather real production models running 10 to 100 times faster. This requires running large complex simulations and profiling the performance on thousands of cores. This process identifies the parallel bottlenecks and highlights what parts of the application need to improve. This cooperative effort between LSTC and Cray has produced impressive results.
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