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An Experimental Model to Analyze OpenMP Applications for System Utilization

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OpenMP in the Petascale Era (IWOMP 2011)

Part of the book series: Lecture Notes in Computer Science ((LNPSE,volume 6665))

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Abstract

Data centers are increasingly focused on optimal use of resources. For technical computing environments, with compute-dominated workloads, we can increase data center efficiencies by increasing multi-core processor utilization. OpenMP programmers need assistance in better understanding efficiencies and scaling for both dedicated and throughput environments. An experimental OpenMP performance analysis model has been developed to give insight into many application scalability bottlenecks. A tool has been developed to implement the model. Compared to other performance analysis tools, this tool takes into account how the operating system scheduler affects OpenMP threaded application performance. Poor parallel scalability can result in reduced system utilization. A case study shows how the tool helped diagnose performance loss caused by OpenMP work distribution schedule strategies. Changing the work distribution schedule substantially improved application performance and system utilization. This tool is specific to Solaris and Studio compilers, although the performance model is applicable to other OpenMP compilers, Linux and UNIX systems.

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Author information

Authors and Affiliations

  1. Oracle Corporation, 500 Eldorado Blvd UBRM05-420, Broomfield, CO, 80021, USA

    Mark Woodyard

Authors
  1. Mark Woodyard
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Editor information

Editors and Affiliations

  1. Dept. of Computer Science, University of Houston, 501 Philip G. Hoffman Hall, 4800 Calhoun Rd, 77204-3475, Houston, TX, USA

    Barbara M. Chapman

  2. Dept. of Computer Sci., Univ. of Illinois, 61801, Urbana, Illinois, USA

    William D. Gropp

  3. Argonne National Laboratory, TCS, Bldg 240, Rm 1125, 9700 S. Cass Avenue, 60439, Argonne, IL, USA

    Kalyan Kumaran

  4. Center for Information Services and High Performance Computing (ZIH), Technische Universität Dresden, Zellescher Weg 12, 01062, Dresden, Germany

    Matthias S. Müller

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© 2011 Springer-Verlag Berlin Heidelberg

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Woodyard, M. (2011). An Experimental Model to Analyze OpenMP Applications for System Utilization. In: Chapman, B.M., Gropp, W.D., Kumaran, K., Müller, M.S. (eds) OpenMP in the Petascale Era. IWOMP 2011. Lecture Notes in Computer Science, vol 6665. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-21487-5_3

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  • DOI: https://doi.org/10.1007/978-3-642-21487-5_3

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-21486-8

  • Online ISBN: 978-3-642-21487-5

  • eBook Packages: Computer ScienceComputer Science (R0)

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