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Critical path profiling of message passing and shared-memory programs

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1 Author(s)
Hollingsworth, J.K. ; Dept. of Comput. Sci., Maryland Univ., College Park, MD, USA

We introduce a runtime, nontrace-based algorithm to compute the critical path profile of the execution of message passing and shared-memory parallel programs. Our algorithm permits starting or stopping the critical path computation during program execution and reporting intermediate values. We also present an online algorithm to compute a variant of critical path, called critical path zeroing, that measures the reduction in application execution time that improving a selected procedure will have. Finally, we present a brief case study to quantify the runtime overhead of our algorithm and to show that online critical path profiling can be used to find program bottlenecks

Published in:

Parallel and Distributed Systems, IEEE Transactions on  (Volume:9 ,  Issue: 10 )

Date of Publication:

Oct 1998

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