HP-UX Workload Manager User's Guide

Integration with other products
Integrating with processor sets (PSETs)
Appendix D406
NOTE On HP-UX 11i v1 (B.11.11) systems, you must install PSET
(PROCSETS) software; see the HP-UX WLM Release Notes. PSET
functionality comes with HP-UX 11i v2 (B.11.23) and later. Certain
software restrictions apply to using PSET-based groups with virtual
partitions (vPars), Instant Capacity, and Pay per use. For more
information, see the WLM Release Notes (/opt/wlm/share/doc/Rel_Notes).