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Automatic Testing of OpenACC Applications

  • Khalid Ahmad
  • Michael Wolfe
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10732)

Abstract

PCAST (PGI Compiler-Assisted Software Testing) is a feature being developed in the PGI compilers and runtime to help users automate testing high performance numerical programs. PCAST normally works by running a known working version of a program and saving intermediate results to a reference file, then running a test version of a program and comparing the intermediate results against the reference file. Here, we describe the special case of using PCAST on OpenACC programs running on a GPU-accelerated system. Instead of saving to and comparing against a reference file, the compiler generates code to run each compute region on both the host CPU and the GPU. The values computed on the host and GPU are then compared, using OpenACC data directives and clauses to decide what data to compare.

Keywords

Program testing Relative debugging Reproducibility OpenACC GPU 

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.University of UtahSalt Lake CityUSA
  2. 2.NVIDIA/PGIBeavertonUSA

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