HP-UX Virtual Partitions Administrator's Guide (includes A.05.02)

CPU, Memory, and I/O Resources (A.03.xx)
CPU: Managing I/O Interrupts
Chapter 8
293
CPU: Managing I/O Interrupts
This section describes information you need if you are managing I/O interrupts on a vPars-enabled system.
Note that migrating interrupts should only be done by advanced administrators for performance tuning.
intctl command
The intctl command is a HP-UX tool that allows you to manage I/O interrupts among active CPUs.
For HP-UX 11i v1, intctl is not installed by default with HP-UX, but you can obtain the software for intctl
from the HP-UX Software Pack for 11i v1. Software Pack is available from the Software Pack DVD included
with the HP-UX 11i OE DVDs or from the Software Depot web site at http://www.hp.com/go/softwaredepot.
For more information, see the Interrupt Migration Product Note available at http://docs.hp.com or the intctl
(1M) manpage.
Notes
• Interrupts are processed only by bound CPUs.
• Therefore, when managing I/O interrupts with intctl, you can manage the I/O interrupts only among
the bound CPUs.
• Further, disabling interrupts on a bound CPU does not convert the bound CPU into an unbound CPU.