If the CPU utilization of a system is at 100%, workloads with low importance (low dispatch priority) might not get dispatched anymore. This could cause problems if the work holds a resource and by that holds up more important workloads. Therefore, any address space or enclave which has ready-to-run work units (TCBs or SRBs), but does not get CPU service within a certain time interval due to its low dispatch priority, will be temporarily promoted by WLM to a higher dispatch priority. This helps to complete low priority work in a finite time period, without permanently delaying high priority work.
The Blocked Workload Analysis section lists the number of dispatchable work units that are considered to be blocked and eligible for priority promotion. This section also displays the OPT parameters which define the workload promotion. It also displays the average exploitation of the defined promotion rate during the measurement interval. This information helps you to adjust these OPT parameters. To assess the amount of workload still being blocked, the average and peak number of address spaces and enclaves found blocked and waiting for promotion is also listed.