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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
This commit is contained in:
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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2
kernel/smp.c
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@@ -26,6 +26,8 @@
#include <linux/sched/debug.h>
#include <linux/jump_label.h>
#include <trace/events/ipi.h>
#include "smpboot.h"
#include "sched/smp.h"