Using dynamic MIPS ratings

Having these engines in your current configuration, or in the configuration that you want to model, significantly affects the performance of the whole Central Electronic Complex (CEC). Therefore, it is impossible to assign a fixed MIPS rating to a particular processor model without taking into account the number of special processors.

To reflect the effect of specialized engines on the performance of the whole CEC, all BMC AMI Capacity Management components uses a proprietary method of calculating the dynamic MIPS rating. This method is based on the processor model and number of General Purpose engines, zAAPs, and zIIPs.

Note that on 2086, 2096, and some 2094 processor models (4 xx, 5 xx and 6 xx), the speed of specialized processors (zAAPs and zIIPs) can exceed the speed of General Purpose processors by 1.25 to 17 times. All BMC AMI Capacity Management components take this speed difference into account in calculating the dynamic MIPS rating.

Specialized ICF and IFL engines also affect the performance of the CEC, but their influence is much less significant because these engines are never used by an LPAR together with other types of engines. Because of that, BMC AMI Capacity Management components do not take into account the effect of ICF and IFL engines on CEC performance.

For more information about modeling zAAPs and zIIPs, see the BMC Performance Predictor for Mainframes documentation.