RMF LPAR management time reporting

RMF processor utilization reporting includes LPAR Management Time on the Partition Data Report. RMF provides information about all shared logical cores that remain active for the duration of the reporting interval. RMF can also be run on a single LP if additional information is required.

There are two types of LPAR management time reporting: time spent managing the LP, and time spent managing the physical configuration. With LPAR Management Time reporting, the time used to manage an LP can be separated from the time used by the workload in an LP.

Figure 1 is an example of how information from the enhanced RMF LPAR Management Time reports can be used. This example shows the LPAR Management Time and the partition effective dispatch time for each LP. As CPU utilization increases, LPAR management time decreases, and the external throughput rate (ETR) increases.

Using the RMF report, CPU-utilization calculations can be based on an LP’s effective dispatch time. The effective dispatch time can be determined by excluding LPAR Management Time from the time that a physical core is assigned to a logical core.