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--- realtime:documentation:howto:tools:cpu-partitioning:irqaffinity [2017/07/17 16:08]
anna-maria created
+++ realtime:documentation:howto:tools:cpu-partitioning:irqaffinity [2023/10/02 13:19] (current)
costa.shul +Default IRQ affinity
@@ Line 1: / Line 1: @@
-====== irqaffinity ======
+====== Default IRQ affinity ======
 The ''irqaffinity'' kernel parameter can be used to specify a
-set of CPUs which are allowed to handle the incoming IRQs. The
+default set of CPUs which are allowed to handle the incoming IRQs. The
 parameter argument is a CPU list:
-  isoaffinity=<cpu number>,….,<cpu number>
+  irqaffinity=<cpu number>,….,<cpu number>
+References:
-Please refer to
+  * [[https://docs.kernel.org/admin-guide/kernel-parameters.html#cpu-lists|cpu lists in The kernel's command-line parameters]]
-[[https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt|Linux kernel documentation]] for more detailed information.
+  * [[https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/kernel/irq/irqdesc.c|kernel/irq/irqdesc.c]]
+  * see ''irq_default_affinity'' in the sources
+  * see ''/proc/irq/default_smp_affinity'' in [[https://docs.kernel.org/core-api/irq/irq-affinity.html|SMP IRQ affinity]]
+  * [[realtime:documentation:howto:tools:cpu-partitioning:procfs|smp_affinity in procfs]]

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