Installing and Managing HP-UX Virtual Partitions (A.02.01)

Monitor and Shell Commands
Adding and Removing CPU Resources
Chapter 5 143
winona1# vparcreate -p winona2 -a cpu::2 -a cpu:::2 -a
cpu:41
• If you want to specify multiple processors, use the -acpu: hw_path
option for each hardware path. For example, if you want to specify
the CPU at hardware path 41 and the CPU at hardware path 45, the
command is:
winona1# vparcreate -p winona2 -a cpu::2 -a cpu:::2 -a
cpu:41 -a cpu:45
Note that because there are two paths specified, min must be greater
than or equal to two. Further, because there are at least two bound
CPUs, total must be at least two.
Removing a Bound CPU
To remove a bound CPU from a virtual partition, use the vparmodify
command to modify the total and min parameters for the virtual
partition.
Example • If the partition winona2 has two bound CPUs and you want only one
bound CPU (and you do not want to add any unbound CPUs), set the
total and min numbers to one:
winona1# vparmodify -p winona2 -m cpu:::1 -m cpu::1
NOTE: If you set only the min number to one and leave the total
number set at two, you will still have two CPUs assigned to winona2.
One bound CPU will be removed from the partition, but one unbound
CPU will be added to the partition in order to maintain the total of
two CPUs.
NOTE: Because one of the value requirements for CPUs is min <=
total and because command line options are processed left to right,
when setting both min and total to one, you need to set min to one
before setting total to one. This is accomplished by specifying the -m
cpu::: min option before the -m cpu:: total option.
Removing a CPU with a Specified Hardware Path
If you had specified a hardware path for a bound CPU, you would delete
the specified hw_path and modify the min and total numbers.