Master Processor Exerciser (VIRSTOMP)

Master Processor Exerciser (VIRSTOMP), an IBM internal tool, is used to create workloads with unique and repeatable storage reference patterns and drive work on the z/VM master processor. The program was created from the Virtual Storage Exerciser (VIRSTOEX) tool.

The tools are the same with the exception of how the BURNCT= execution is implemented. In VIRSTOEX, there is simply a BrCT instruction which is executed. In VIRSTOMP, the BrCT instruction is moved to a User Defined Diagnose (x'018C') which is loaded as NONMP to force the instruction to be executed on the z/VM master processor. All the parameters of VIRSTOMP are identical to the VIRSTOEX parameters.