The following commit has been merged into the smp/core branch of tip:
Commit-ID: 56eb0598c7a30c76009a082d3213486d6a013df0
Gitweb: https://git.kernel.org/tip/56eb0598c7a30c76009a082d3213486d6a013df0
Author: Valentin Schneider <vschneid@xxxxxxxxxx>
AuthorDate: Tue, 07 Mar 2023 14:35:52
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Fri, 24 Mar 2023 11:01:26 +01:00
trace: Add trace_ipi_send_cpumask()
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 exports a target cpumask, a callsite and a callback.
Signed-off-by: Valentin Schneider <vschneid@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230307143558.294354-2-vschneid@xxxxxxxxxx
---
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 0be71da..b1125dc 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),
|