NDLI: Performance analysis of the alliant fx/8 multiprocessor using statistical clustering

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Performance analysis of the alliant fx/8 multiprocessor using statistical clustering

Content Provider	NASA Technical Reports Server (NTRS)
Author	Dimpsey, Robert Tod
Copyright Year	1988
Description	Results for two distinct, real, scientific workloads executed on an Alliant FX/8 are discussed. A combination of user concurrency and system overhead measurements was taken for both workloads. Preliminary analysis shows that the first sampled workload is comprised of consistently high user concurrency, low system overhead, and little paging. The second sample has much less user concurrency, but significant paging and system overhead. Statistical cluster analysis is used to extract a state transition model to jointly characterize user concurrency and system overhead. A skewness factor is introduced and used to bring out the effects of unbalanced clustering when determining states with important transitions. The results from the models show that during the collection of the first sample, the system was operating in states of high user concurrency approximately 75 percent of the time. The second workload sample shows the system in high user concurrency states only 26 percent of the time. In addition, it is ascertained that high system overhead is usually accompanied by low user concurrency. The analysis also shows a high predictability of system behavior for both workloads.
File Size	1395083
Page Count	44
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19890003774
Archival Resource Key	ark:/13960/t16m84r34
Language	English
Publisher Date	1988-11-01
Access Restriction	Open
Subject Keyword	Computer Operations And Hardware Cluster Analysis Concurrent Processing Statistical Distributions Skewness Computer Systems Performance Mathematical Models Supercomputers Architecture Computers Multiprocessing Computers Queueing Theory Run Time Computers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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