May 2 – 6, 2011
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Europe/Berlin timezone

OpenMP Performance on Virtual Machines

May 3, 2011, 2:15 PM
Hörsaal / lecture hall (GSI Helmholtzzentrum für Schwerionenforschung GmbH)

Hörsaal / lecture hall

GSI Helmholtzzentrum für Schwerionenforschung GmbH

Planckstr. 1, 64291 Darmstadt, Germany
Computing & Batch Services Computing


Dr Jie Tao


Virtualization technology has been applied to a variety of areas including server consolidation, High Performance Computing, as well as Grid and Cloud computing. Due to the fact that applications do not run directly on the hardware of a host machine, virtualization generally causes a performance loss for both sequential and parallel applications. This talk studies the OpenMP applications running on a virtualized multicore machine. It shows the overhead of parallelization and compares the parallel performance on virtual machines with the performance of native executions. An interesting scenario is that one application runs much slower in parallel than the sequential runs. A performance analysis tool is then applied to investigate the cause of such abnormal behavior. The talk demonstrates the performance optimization and the results based on the analysis.

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