HP-UX 11i Version 2 Release Notes (October 2003)

General System Administration
Interrupt Migration
Chapter 4
89
For further information about Interrupt Migration, see the manpage intctl (1M).
Summary of Change
Interrupt Migration can be used to do the following:
• View the interrupt configuration of the system.
• Change the interrupt configuration of the system by migrating interrupts from one
CPU to another. The system performance can be significantly improved by
distributing the interrupt load across the CPUs through the Interrupt Migration
command (intctl).
• Store and restore the interrupt configuration of the system.
• Activate, de-activate or reserve CPUs (to receive interrupts from some specific cards)
for interrupts through the Processor Sets command, psrset (see “HP-UX Processor
Sets” on page 75).
Machines Affected
This feature works on all the servers supported by the HP-UX 11i v2 release, but not on
the workstations (see “Workstation- and Server-Specific Information” on page 39 for
details).
Impact
Interrupt Migration can be used to manage the interrupt configuration of the system.
Through proper distribution of the interrupt load across processors, the overall system
performance can be improved. RTE uses Interrupt Migration to reserve a CPU for
interrupts from RTE-reserved cards.
The Interrupt Migration command (intctl) can be used to display and change the
interrupt configuration of the system. The interrupt configuration of the system can be
saved and restored at a later time through the intctl command.
Compatibility
There are no compatibility issues.
Performance
The Interrupt Migration feature can be used by system administrators to distribute the
interrupt load across the CPUs and thus to improve system performance.
Documentation
For further information, see the Interrupt Migration command manpage intctl (1M).
Obsolescence
Not applicable.