To MIPS or Not to MIPS; That is the CP Question!

Project and Program: MVS, MVS Performance

Tags: Proceedings, 2016, SHARE in San Antonio 2016

Processors used to be simple: they ran at a fixed instruction rate; and capacity planning was based on MIPS (Millions of Instructions Per Second). In addition to being immensely larger; today's z Systems processors are much more complex and sophisticated. Features such as PR/SM; the number of CPs; workload mixes; millicode; specialty engines; and cache structures all affect processor performance and capacity. During this presentation the speaker will discuss these issues and offer some suggestions on when to use MIPS for capacity planning; and when MIPS is merely a Misleading Indicator of Processor Speed. This session was presented previously; but it has been updated with the latest z Systems processor experience.-Gary King-IBM Corporation

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