Refer to the query use information provided for the RMFWCL query to gain an understanding of the value provided by these workload characterization queries. This RMFWCT query provides additional insight that allows you to further refine decisions regarding capacity requirements in an existing z10 or z196 CPC, or when planning to upgrade to a z196 or later generation CPC.
For example, if the workloads driving the need for additional capacity primarily execute on zIIP engines, then you should closely examine the cache utilization characteristics at the zIIP engine level to help determine how much capacity is needed to meet your requirements.
You may discover that for a particular LPAR, workloads running on zIIP or zAAP processors have better Level 1 cache hit ratios. When a miss occurs, they incur fewer penalty cycles in retrieving the required item than workloads running on CP processors. This knowledge will help you to determine the appropriate number and types of IPU engines necessary to meet your capacity requirements.
Finally, when analyzing application performance, where applications tend to exploit particular IPU types, such as the CP or specialty engines, these CPUTYPE level charts provide much better cache usage analysis than the LPAR level charts where all IPU performance information is summarized to the LPAR level.
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