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
vPars A.04.xx/A.05.xx RulesvPars A.03.xx Rules
dynamic CPU migration
• all CPUs except the boot processor can be migrated
while a virtual partition is up
dynamic CPU migration
• only unbound CPUs can be migrated while a virtual
partition is up
count rules
• min <= total
• total = (number of CPUs assigned by hw_path) +
(number of CPUs assigned by cell) + (number of CPUs
assigned by vPars Monitor)
NOTE: when the virtual partition is booted, one of the
CPUs from the operand list above becomes the boot
processor.
NOTE: from a user’s point of view, the same CPU
could be considered under more than one category.
However, the vPars Monitor will categorize and count
a CPU only once. Use vparstatus -v to see the CPU
details
• total <= max
• when a virtual partition is down, the number of CPUs
assigned by hardware path must be less than or equal
to the pre-existing total
count rules
• number of CPUs assigned by hw_path <= min
• min<= total<= max
adding to or deleting from the total count of CPUs is
performed by any of the following:
• modifying total directly (cpu::total)
• adding or deleting by hw_path (cpu:hw_path)
— if the virtual partition is up, total will be adjusted
automatically (unless the CPUs are already assigned
to the partition)
— if the virtual partition is down, the number of CPUs
assigned by hardware path must be less than or
equal to the pre-existing total
if this is the case, you should first modify total to
allow the additional CPU.
• adding or deleting by CLP
— total will be adjusted automatically
adding to or deleting from the total count of CPUs
assigned to a virtual partition is performed by only
• modifying total directly (cpu::total)
adding by num (-a cpu::num)
• deletion requires decreasing by num (-d cpu::num) or
by hw_path (-d cpu:hw_path)
adding by num (-a cpu::num)
• deletion requires decreasing by num (-d cpu::num)
adding by hw_path (-a cpu:hw_path)
• deletion requires deleting by hw_path (-d
cpu:hw_path)
• this does adjust total if the virtual partition is up
(unless the CPU is already assigned to the partition);
otherwise, if the virtual partition is down, the number
of CPUs assigned by hardware path must be less than
or equal to the current total
• partition can be up or down
adding by hw_path (-a cpu:hw_path)
• deletion requires deleting by hw_path (-d
cpu:hw_path)
• this does not adjust total
• this does not adjust min
• requires the partition to be down
44 How vPars and Its Components Work