SCHEDULE: NOV 15-20, 2015

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A Standard Debug Interface for OpenMP Target Regions

SESSION: Regular & ACM Student Research Competition Poster Reception

EVENT TYPE: Posters, Receptions, ACM Student Research Competition

EVENT TAG(S): HPC Beginner Friendly, Regular Poster

TIME: 5:15PM - 7:00PM

SESSION CHAIR(S): Michela Becchi, Manish Parashar, Dorian C. Arnold

AUTHOR(S):Andreas Erik Hindborg, Ignacio Laguna, Sven Karlsson, Dong H. Ahn

ROOM:Level 4 - Lobby

ABSTRACT:

As OpenMP covers more on-node parallelism, debugging OpenMP
programs is becoming challenging. Debuggers often debug OpenMP at a
system-thread level, leaving programmers with limited state
information on OpenMP threads. The OpenMP debugging interface, OMPD,
has been proposed as a standard interface to overcome these
limitations. However, the current specification works only for OpenMP
3.1 -- it cannot handle OpenMP 4.0 programs because it does not
consider OpenMP target constructs. In this work, we study how to
extend OMPD to OpenMP 4.0 and propose a set of OMPD extensions. We
identify crucial scalability issues with the way OMPD currently
represents threads and propose a new representation, Construction of
Online Lightweight Thread handle, COLT, as a scalable solution. Our
evaluation shows that our scheme is feasible as far as basic OMPD
support is provided for OpenMP 4 runtime component and can also
significantly reduce the memory and performance overheads of the
debuggers.

Chair/Author Details:

Michela Becchi, Manish Parashar, Dorian C. Arnold (Chair) - University of Missouri|Rutgers University|University of New Mexico|

Andreas Erik Hindborg - Technical University of Denmark

Ignacio Laguna - Lawrence Livermore National Laboratory

Sven Karlsson - Technical University of Denmark

Dong H. Ahn - Lawrence Livermore National Laboratory

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