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SPAM: a microcode based tool for tracing operating system events

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Source

International Symposium on Microarchitecture archive
Proceedings of the 20th annual workshop on Microprogramming table of contents

Colorado Springs, Colorado, United States

Pages: 168 - 171

Year of Publication: 1987

ISBN:0-89791-250-0

Authors

Stephen W. Melvin	Computer Science Division, University of California, Berkeley, Berkeley, CA
Yale N. Patt	Computer Science Division, University of California, Berkeley, Berkeley, CA

Sponsor

SIGMICRO: ACM Special Interest Group on Microarchitectural Research and Processing

Publisher

ACM New York, NY, USA

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Downloads (6 Weeks): 2, Downloads (12 Months): 7, Citation Count: 1

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ABSTRACT

We have developed a tool called SPAM (for System Performance Analysis using Microcode), based on microcode modifications to a VAX 8600, that traces operating system events as a side-effect to normal execution. This trace of interrupts, exceptions, system calls and context switches can then be processed to analyze operating system behavior for the purpose of debugging, tuning or development. SPAM allows measurements to be made on a fully operating UNIX system with little perturbation (typically less than 10%) and without the need for modifying the kernel.

REFERENCES

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