[RFC PATCH v2 2/8] trace: Add trace_ipi_send_cpumask()
From: Valentin Schneider <vschneid@redhat.com>
Date: 2022-11-02 18:35:13
Also in:
linux-alpha, linux-arm-kernel, linux-mips, linux-riscv, linux-s390, linux-sh, lkml, loongarch, sparclinux
Subsystem:
the rest, tracing · Maintainers:
Linus Torvalds, Steven Rostedt, Masami Hiramatsu
trace_ipi_raise() is unsuitable for generically tracing IPI sources due to its "reason" argument being an uninformative string (on arm64 all you get is "Function call interrupts" for SMP calls). Add a variant of it that takes a exports a target CPU, a callsite and a callback. Signed-off-by: Valentin Schneider <vschneid@redhat.com> --- include/trace/events/ipi.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/include/trace/events/ipi.h b/include/trace/events/ipi.h
index 0be71dad6ec03..b1125dc27682c 100644
--- a/include/trace/events/ipi.h
+++ b/include/trace/events/ipi.h@@ -35,6 +35,28 @@ TRACE_EVENT(ipi_raise, TP_printk("target_mask=%s (%s)", __get_bitmask(target_cpus), __entry->reason) ); +TRACE_EVENT(ipi_send_cpumask, + + TP_PROTO(const struct cpumask *cpumask, unsigned long callsite, void *callback), + + TP_ARGS(cpumask, callsite, callback), + + TP_STRUCT__entry( + __cpumask(cpumask) + __field(void *, callsite) + __field(void *, callback) + ), + + TP_fast_assign( + __assign_cpumask(cpumask, cpumask_bits(cpumask)); + __entry->callsite = (void *)callsite; + __entry->callback = callback; + ), + + TP_printk("cpumask=%s callsite=%pS callback=%pS", + __get_cpumask(cpumask), __entry->callsite, __entry->callback) +); + DECLARE_EVENT_CLASS(ipi_handler, TP_PROTO(const char *reason),
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2.31.1