SC is the International Conference for
 High Performnance Computing, Networking, Storage and Analysis

SCHEDULE: NOV 13-19, 2010

PerfExpert: An Easy-to-Use Performance Diagnosis Tool for HPC Applications

SESSION: Optimization Strategies on the Node

EVENT TYPE: Paper

TIME: 4:30PM - 5:00PM

SESSION CHAIR: Karl Fuerlinger

AUTHOR(S):Martin Burtscher, Byoung-Do Kim, Jeff Diamond, John McCalpin, Lars Koesterke, James Browne

ROOM:393

ABSTRACT:
HPC systems are notorious for operating at a small fraction of their peak performance, and the ongoing migration to multi-core and multi-socket compute nodes further complicates performance optimization. The readily available performance evaluation tools require considerable effort to learn and utilize. Hence, most HPC application writers do not use them. As remedy, we have developed PerfExpert, a tool that combines a simple user interface with a sophisticated analysis engine to detect probable core, socket, and node-level performance bottlenecks in each important procedure and loop of an application. For each bottleneck, PerfExpert provides a concise performance assessment and suggests steps that can be taken by the programmer to improve performance. These steps include compiler switches and optimization strategies with code examples. We have applied PerfExpert to several HPC production codes on the Ranger supercomputer. In all cases, it correctly identified the critical code sections and provided accurate assessments of their performance.

Chair/Author Details:

Karl Fuerlinger (Chair) - University of California, Berkeley

Martin Burtscher - University of Texas at Austin

Byoung-Do Kim - University of Texas at Austin

Jeff Diamond - University of Texas at Austin

John McCalpin - University of Texas at Austin

Lars Koesterke - University of Texas at Austin

James Browne - University of Texas at Austin

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The full paper can be found in the ACM Digital Library and IEEE Computer Society

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