The RNI-based LSPR and the Latest IBM Z Performance Brief

Project and Program: MVS, MVS Performance

Tags: Proceedings, 2020, SHARE Fort Worth 2020

With the introduction of z196 in 2010, the Large System Performance Reference (LSPR) was significantly enhanced to be based on a measure of a workload's intensity of use of a processor's memory hierarchy. Since then the methodology has seen much validation and continues to be used up through the latest z Systems processors. This session will discuss the theory behind Relative Nest Intensity (RNI) and its basis on data gathered using CPU MF. Its application to capacity sizing will be illustrated by contrasting the performance of the latest z Systems processors; topics include processors, cache and memory topology, SMT, subcapacity models, and workload variability.-David Hutton-IBM

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