File: //lib/python3.9/site-packages/tuned/plugins/__pycache__/plugin_irq.cpython-39.pyc
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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.
.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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