HP-UX Virtual Partitions Administrator's Guide (includes A.03.05 and A.04.05)

CPU: Boot Processor and Dynamic CPU Definitions
Beginning with vPars A.04.01, the restrictions of bound CPUs have been removed as well as the
terms bound and unbound. Now, there are two types of CPUs: boot processors and dynamic
CPUs.
The Boot Processor is the CPU on which the OS kernel of the virtual partition was booted. There
is one boot processor per virtual partition. On booting of a virtual partition, the vPars Monitor
determines which CPU becomes the boot processor. Note that the specific CPU chosen as the
boot processor may differ across virtual partition reboots.
Dynamic CPUs are all the other CPUs, because all CPUs, except the boot processor of each virtual
partition, can be dynamically migrated. You can find which CPU is the boot processor by using
the vparstatus command; see “Commands: Displaying Monitor and Resource Information
(vparstatus)” (page 133).
Note that you can only add CPUs that are available. If you are using iCAP (formerly known as
iCOD), the CPUs must be active and authorized by iCAP before you can add it to a virtual
partition.
In A.04.xx, all CPUs can process I/O interrupts. See “Managing I/O Interrupts” (page 232).
CPU: Boot Processor and Dynamic CPU Definitions 227