HP-UX Virtual Partitions Administrator's Guide (includes A.05.02)

CPU, Memory, and I/O Resources (A.05.xx)
CPU: Hyperthreading ON/OFF (HT ON/OFF)
Chapter 6
229
This means that all the vPars commands for CPUs work the same as they did in vPars A.04.xx, including
using the same legacy hardware path format.
• HT ON is not supported in a mixed HP-UX 11i v2/v3 vPars environment.
• Turning hyperthreading on or off at the EFI level or Monitor level has nPar wide scope. Individual virtual
partitions can use the HP-UX command lcpu_attr to turn logical processors on or off within processor
sets in a virtual partition. However, if hyperthreading is turned off at the EFI or Monitor level, the
lcpu_attr command will not have any effect.