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Non-intrusive and interactive profiling in parasight

Content Provider	ACM Digital Library
Author	Gertner, Ilya Aral, Ziya
Abstract	Debugging the performance of parallel applications is crucial for fully utilizing the potential of multiprocessor hardware. This paper describes profiling tools in Parasight, a programming environment that is geared towards non-intrusive performance analysis and high-level debugging. In Parasight, profilers execute as observer programs which run concurrently with the target program and monitor its behavior. This design grew out of our experience in debugging and monitoring the performance of real parallel programs.Parasight is used to implement an interactive profiler based on gprof, a standard UNIX profiling tool. The new profiler is an interactive tool that is dynamically controlled by the programmer and can run concurrently with the target program. It is also less intrusive than the original. This was achieved in part by off-loading the profile gathering computations to an adjacent processor and in part by allowing selective profiling.In conjunction with the new profiler, Parasight is used to implement high-level custom profiling routines that may be inserted at arbitrary locations in a target program to measure user-defined abstractions. One outcome has been to develop the beginnings of a profiling methodology in which high-level performance problems are detected through a function profiler and detailed performance bottlenecks are analyzed with custom profiling routines.Parasight, the new profiler and their associated tools have been implemented on the Encore Multimax, a shared-memory multiprocessor running UNIX. They have been used to profile both parallel and sequential programs.
Starting Page	21
Ending Page	30
Page Count	10
File Format	PDF
ISBN	0897912764
DOI	10.1145/62115.62119
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1988-01-01
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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