Integrated Measurement for Cross-Platform OpenMP Performance Analysis

Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8766)


The ability to measure the performance of OpenMP programs portably across shared memory platforms and across OpenMP compilers is a challenge due to the lack of a widely-implemented performance interface standard. While the OpenMP community is currently evaluating a tools interface specification called OMPT, at present there are different instrumentation methods possible at different levels of observation and with different system and compiler dependencies. This paper describes how support for four mechanisms for OpenMP measurement has been integrated into the TAU performance system. These include source-level instrumentation (Opari), a runtime “collector” API (called ORA) built into an OpenMP compiler (OpenUH), a wrapped OpenMP runtime library (GOMP using ORA), and an OpenMP runtime library supporting an OMPT prototype (Intel). The capabilities of these approaches are evaluated with respect to observation visibility, portability, and measurement overhead for OpenMP benchmarks from the NAS parallel benchmarks, Barcelona OpenMP Task Suite, and SPEC 2012. The integrated OpenMP measurement support is also demonstrated on a scientific application, MPAS-Ocean.


Parallel Region Task Scheduler Thread Count OpenMP Program Hardware Counter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.University of OregonEugeneUSA
  2. 2.Los Alamos National LaboratoryLos AlamosUSA

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