Abstract

Sampling the state of interactive computer users of harware and programming in a time-sharing system leads to an understanding of delays to users caused by contentionf or resources. This paper discusses user state sampling by means of a program called VM/ Monitor on the interactive time-sharing system, VM/370, although the methodology is applicable to other time-sharing systems. Also discussed are system bottleneck detection and secondary tuning after bottlenecks have been found. Possible extensions of the technique are also presented.

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