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

NOTE: The target virtual partition can be up or down when specifying by hardware path.
CPUs that are added using the hardware path syntax can be deleted only by using the hardware
path syntax.
Adding or deleting CPUs by hardware path changes total only when the virtual partition is up
(unless the operation is an addition and the specified CPU is already assigned to the partition).
If the virtual partition is down, total is not changed and becomes a high boundary. For example,
if keira2 is down and total is set to 2, you cannot have more than 2 CPUs added by hardware
path. This is for A.03.xx backwards compatibility.
Example
• To add the CPUs at 0/10 and 0/11 to keira2:
keira1# vparmodify -p keira2 -a cpu:0/10 -a cpu:0/11
Using both the Hardware Path Specification and CLP specification
Although you can add and delete CPUs by hardware path, to avoid confusion it is recommended
that you specify by cell rather than by hardware path. The exception is for dual-core processors.
For dual-core processors, if you wish to have both cores of a processor assigned to the same
virtual partition, you should specify by hardware path instead of by cell. Specifying by cell cannot
guarantee that both cores in the processor are the CPUs chosen by the Monitor and assigned to
the target virtual partition, although the Monitor will attempt to do this whenever possible.
For more information on configuring dual-core processors, see “CPU: Dual-Core Processors”
(page 200).
CPU: Notes on vPars Syntax, Rules, and Output
CPU: CLI Rules for Dynamic Migration of Memory and CPU
Note the following CLI (Command Line Interface) rules for online migration of memory and
CPUs while the target partitions are up. Note that because the following applies to only online
migration (in other words, where the target partition is up), the following does not apply to the
vparcreate command, where the target virtual partition should never be up during the
vparcreate invocation.
• In the same command, you cannot have an online addition and online deletion. For example,
the following are illegal:
— keira1# vparmodify -p keira2 -a cpu::2 -d cpu::1
— keira1# vparmodify -p keira2 -a mem::1024 -d mem::512
You must specify each change on a separate command line. For example, the following are
allowed:
198 CPU, Memory, and I/O Resources (A.05.xx)