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Lecture Notes in Computer Science
Multiprocessors based on simultaneous multithreaded (SMT) or multicore (CMP) processors are continuing to gain a significant share in both highperformance and mainstream computing markets. In this paper we evaluate the performance of OpenMP applications on these two parallel architectures. We use detailed hardware metrics to identify architectural bottlenecks. We find that the high level of resource sharing in SMTs results in performance complications, should more than 1 thread be assigned on adoi:10.1007/978-3-540-68555-5_11 fatcat:5sdth4krs5b3hhnsht24ymz5k4