HP-UX Virtual Partitions Administrator Guide (includes A.05.07) (5900-1229, September 2010)

Table 2-6 CPU Rules from A.03.xx to A.04.xx/A.05.xx (continued)
vPars A.04.xx/A.05.xx RulesvPars A.03.xx Rules
deleting by hw_path (-d cpu:hw_path)
• can delete any CPU (except the boot processor)
deleting by hw_path (-d cpu:hw_path)
• can only delete CPU added by hw_path
adding by cell (-a cell:cell_ID:cpu::num)
• requires deleting by either of the following:
— by cell (-d cell:cell_ID:cpu::num)
— by hw_path (-d cpu:hw_path)
adding by cell
• not available in A.03.xx
boot processor
• cannot be deleted while the virtual partition is up
Note that the actual boot processor can change across
virtual partition reboots. Use the vparstatus -v
command to determine which CPU is the current boot
processor
boot processor
• not available in A.03.xx
vparstatus output when virtual partition is down
• shows CPUs assigned by hardware path
• shows count of CPUs assigned by cell
vparstatus output when virtual partition is down
• shows all bound CPUs assigned to the partition
I/O interrupts
• at boot: all CPUs can handle I/O interrupts
• after boot:
— when CPUs are removed from a virtual partition,
the I/O interrupts are automatically reassigned to
the other active CPUs
— when CPUs are added to a virtual partition, the I/O
interrupts are not automatically processed by the
added CPUs
— intctl can be applied to all CPUs
I/O interrupts
• only bound CPUs can handle I/O interrupts
• intctl (interrupt control) applies to only the bound
CPUs
Transitioning from vPars A.03.xx to vPars A.04.xx/A.05.xx (CPU Syntax and Rules) 45