Abstract
Due to the need for extensive and detailed simulations of the CEBAF Large Acceptance Spectrometer (CLAS), the Monte-Carlo code CLASGeant was transferred to a heterogeneous computing cluster and has been linked to the Parallel Virtual Machine (PVM) message-passing library. The resulting simulation package, PvmGeant, achieves an almost linear speedup in physics-event simulation. This article describes modifications to the original GEANT code, its integration with PVM, and performance tests that were conducted at the comput ing cluster at The Supercomputing Computations Re search Institute at Florida State University. Particular attention has been given to measuring the effect of different data structures on the cost of network com munication between nodes.
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