With the implementation of Simultaneous Multi-threading (SMT) for zIIPs, IBM has introduced many new metrics, and this video reviews that reporting. It also demonstrates reporting on various relationships between zIIPs and CPs, along with numerous metrics designed to enhance management of the zIIP configuration in a manner similar to general purpose CPs, including LPAR weights, RNI, polarity, PR/SM overhead, and capture ratios.
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zIIP-eligible CPU consumption that overflows onto general purpose CPs (GCPs) – known as “zIIP crossover” - is a key focal point for software cost savings. However, despite your meticulous efforts, it is possible that zIIP crossover work is still consuming GCP cycles unnecessarily.
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