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ScaleMP's vSMP software turns commodity Infiniband clusters with Intel's x86 processors into large shared memory machines providing a single system image at low cost. However, codes need to be tuned to deliver good performance on these machines. TrajSearch, developed at the Institute for Combustion Technology at RWTH Aachen University, is a post-processing code for analyzing trajectories in three dimensional turbulent flow fields. The initial OpenMP version of TrajSearch has been tuned to run very efficiently on the vSMP cluster which exhibits a pronounced NUMA behavior. As a side effect, the code also performs nicely on a more expensive large SGI Altix UV shared memory machine.
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