VPPB - A Visualization and Performance Prediction Tool for Multitreaded Solaris Programs

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Magnus Broberg, Lars Lundberg, Håkan Grahn
Title: VPPB - A Visualization and Performance Prediction Tool for Multitreaded Solaris Programs
Conference name: 12th International Parallel Processing Symposium
Year: 1998
Pagination: 770-776
ISBN: 0818684046
Publisher: IEEE Computer Soc.
City: Orlando, FL, USA
Organization: Blekinge Institute of Technology
Department: Dept. of Computer Science and Business Administration (Institutionen för datavetenskap och ekonomi)
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+46 455 780 00
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Authors e-mail: lars.lundberg@ide.hk-r.se
Language: English
Abstract: Efficient performance tuning of parallel programs is
often hard. In this paper we describe an approach that
uses a uni-processor execution of a multithreaded program
as reference to simulate a multiprocessor execution.
The speed-up is predicted, and the program behaviour is
visualized as a graph, which can be used in the performance
tuning process.
The simulator considers scheduling as well as hardware
parameters, e.g., the thread priority, no. of LWPs,
and no. of CPUs. The visualization part shows the simulated
execution in two graphs: one showing the threads’
behaviour over time and the other the amount of parallel-ism
over time. In the first graph is it possible to relate an
event in the graph to the code line causing the event. Validation
using a Sun multiprocessor with eight processors
and five scientific parallel applications shows that the
speed-up predictions are within +/-6% of a real execution.
Subject: Computer Science\Computersystems
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