HP-UX Virtual Partitions Administrator's Guide (includes A.05.02)
CPU, Memory, and I/O Resources (A.03.xx)
CPU: Removing a Bound CPU
Chapter 8
291
CPU: 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.
NOTE When executing any operations relating to bound CPUs (adding, modifying, or deleting), the
target virtual partition must be down.
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.
CPU: 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.
Example
• If you have two bound CPUs and want to remove the bound CPU at hardware path 41 (and do not want to
add any unbound CPUs), delete the hardware path 41, modify
min
to one, and modify
total
number to
one:
# vparmodify -p winona2 -d cpu:41 -m cpu:::1 -m cpu::1
NOTE If you delete only
hw_path
and leave
total
as two and leave
min
as two, you will still have
two bound CPUs.