File: //lib/python3.9/site-packages/tuned/plugins/__pycache__/plugin_irq.cpython-39.opt-1.pyc
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`irq`::
Allows tuning of IRQ affinities, and thus re-implements functionality
already present in the `scheduler` plugin. However, this plugin offers
more flexibility, as it allows tuning of individual interrupts with
different affinities. When using the `irq` plugin, make sure to disable
IRQ processing in the `scheduler` plugin by setting its option
[option]`irq_process=false`.
The plugin handles individual IRQs as `devices`, and multiple plugin
instances can be defined, each addressing different devices/irqs.
The `device` names used by the plugin are `irq<n>`, where `<n>` is the
IRQ number. The special `device` `DEFAULT` controls values written to
`/proc/irq/default_smp_affinity`, which applies to all non-active IRQs.
===
The option [option]`affinity` controls the IRQ affinity to be set. It is
a string in "cpulist" format (such as 1,3-4). If the configured affinity
is empty, then the affinity of the respective IRQs is not touched.
===
The option [option]`mode` is a string which can either be `set` (default)
or `intersect`. In `set` mode the [option]`affinity` is always written
as configured, whereas in `intersect` mode, the new affinity will be
calculated as the intersection of the current and the configured affinity.
If that intersection is empty, the configured affinity will be used.
--
.Example moving all IRQs to CPU0, except irq16, which is directed to CPU2
====
----
[irq_special]
type=irq
devices=irq16
affinity=2
[irq]
affinity=0
----
====
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