A proposal for error handling in OpenMP

  • Authors:
  • Alejandro Duran;Roger Ferrer;Juan José Costa;Marc Gonzàz;Xavier Martorell;Eduard Ayguadé;Jesú Labarta

  • Affiliations:
  • Barcelona Supercomputing Center, Departament d'Arquitectura de Computadors, Universitat Politècnica de Catalunya, Barcelona, Spain;Barcelona Supercomputing Center, Departament d'Arquitectura de Computadors, Universitat Politècnica de Catalunya, Barcelona, Spain;Barcelona Supercomputing Center, Departament d'Arquitectura de Computadors, Universitat Politècnica de Catalunya, Barcelona, Spain;Barcelona Supercomputing Center, Departament d'Arquitectura de Computadors, Universitat Politècnica de Catalunya, Barcelona, Spain;Barcelona Supercomputing Center, Departament d'Arquitectura de Computadors, Universitat Politècnica de Catalunya, Barcelona, Spain;Barcelona Supercomputing Center, Departament d'Arquitectura de Computadors, Universitat Politècnica de Catalunya, Barcelona, Spain;Barcelona Supercomputing Center, Departament d'Arquitectura de Computadors, Universitat Politècnica de Catalunya, Barcelona, Spain

  • Venue:
  • International Journal of Parallel Programming
  • Year:
  • 2007
  • Towards an error model for OpenMP

    IWOMP'10 Proceedings of the 6th international conference on Beyond Loop Level Parallelism in OpenMP: accelerators, Tasking and more

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Abstract

OpenMP has been focused in performance applied to numerical applications, but when we try to move this focus to other kind of applications, like Web servers, we detect one important lack. In these applications, performance is important, but reliability is even more important, and OpenMP does not have any recovery mechanism. In this paper we present a novel proposal to address this lack. In order to add error handling to OpenMP we propose some extensions to the current OpenMP specification. A directive and a clause are proposed, defining a scope for the error handling (where the error can occur) and specifying a behaviour for handling the specific errors. Some examples of use are presented, and we present also an evaluation showing the impact of this proposal in OpenMP applications. We show that this impact is low enough to consider the proposal worthwhile for OpenMP.