Measurement of I/O bus contention and correlation among heterogeneous device types in a single-bus multiprocessor system

Authors:
Steven H. Vanderleest;Ravishankar K. Iyer
Affiliations:
Center for Reliable and High-Performance Computing, Coordinated Science Laboratory, University of Illinois;Center for Reliable and High-Performance Computing, Coordinated Science Laboratory, University of Illinois
Venue:
ACM SIGARCH Computer Architecture News - Special issue on input/output in parallel computer systems
Year:
1994

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Abstract

This paper describes an approach to measuring bus contention and quantifying the resulting performance degradation. The focus is contention for a single I/O bus resulting from accesses to multiple heterogeneous I/O device types in an MP system. Heterogeneous device types are defined as devices that have widely different characteristics, such as video, network, and disk devices. Correlation analysis is used to characterize the contention and then the corresponding loss in performance is quantified using actual trace data.