SCHEDULE: NOV 16-21, 2014

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Super Debugging: It Was Working Until I Changed ...

SESSION: Invited Talks 1

EVENT TYPE: Invited Speakers

TIME: 11:15AM - 12:00PM

SESSION CHAIR: Robert F. Lucas

Presenter(s):David Abramson

ROOM:New Orleans Theater

ABSTRACT:

Debugging software is a complex, error prone, and often a frustrating experience. Typically, there is only limited tool support, and many of these do little more than allow a user to control the execution of a program and examine it's run time state. This process becomes even more difficult in supercomputers that exploit massive parallelism because the state is distributed across processors, and additional failure modes (such as race and timing errors) can occur. We have developed a debugging strategy called "Relative Debugging", that allows a user to compare the run time state between executing programs, one being a working, "reference" code, and the other being a test version. In this talk I will outline the basic ideas in relative debugging, and will give examples of how it can be applied to debugging supercomputing applications.

Chair/Presenter Details:

Robert F. Lucas (Chair) - Information Sciences Institute

David Abramson - University of Queensland

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