sched, smp: Trace IPIs sent via send_call_function_single_ipi()

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send_call_function_single_ipi() is the thing that sends IPIs at the bottom
of smp_call_function*() via either generic_exec_single() or
smp_call_function_many_cond(). Give it an IPI-related tracepoint.

Note that this ends up tracing any IPI sent via __smp_call_single_queue(),
which covers __ttwu_queue_wakelist() and irq_work_queue_on() "for free".

Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230307143558.294354-3-vschneid@redhat.com

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Valentin Schneider 2023-03-07 14:35:53 +00:00 • committed by Peter Zijlstra

parent 56eb0598c7

commit cc9cb0a717

4 changed files with 9 additions and 4 deletions

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arch/arm/kernel/smp.c

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arch/arm64/kernel/smp.c

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kernel/sched/core.c

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kernel/smp.c

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