The Interrupt Migration feature is part of HP-UX 11i v2 core.
Interrupt Migration can be used to view and modify the interrupt
configuration of the system.
The intended users of Interrupt Migration are system performance-tuning
experts who need to manage the interrupt distribution of the system.
Interrupts from interface cards can be either line-based
(LBI) or transaction-based (TBI) interrupts. If a processor receives
an interrupt when the processor’s interrupt pin is asserted,
that interrupt is line-based. If a processor detects an interrupt
message bus transaction on the system bus, that interrupt is transaction-based.
The intctl command provides options to display the interrupt configuration
of the system, migrate external I/O interrupts from one processor
to another, and to save and restore the interrupt configuration
of the system. The intctl command can be used by performance tuning experts to
re-distribute the interrupt load across the CPUs and to assign interrupts
of Real Time Extension (RTE)-reserved cards to RTE-reserved CPUs.
The intctl command is not a general system administration command.
It should be used only by performance-tuning experts with an advanced
level of system knowledge. Improper re-distribution of interrupts
across CPUs could decrease overall system performance by overloading
some processors and not optimally using the remaining processors.
For further information about Interrupt Migration, see the
manpage intctl(1M).
Summary
of Change |
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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”).
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 |
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There are no compatibility issues.
Performance |
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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 |
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For further information, see the Interrupt Migration command
manpage intctl(1M).
Obsolescence |
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Not applicable.
Printable version
