DEBUG: schedtune: add tracepoint for SchedTune configuration update

Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>

include/trace/events/sched.h

@@ -654,6 +654,27 @@ TRACE_EVENT(sched_load_avg_cpu,
 	TP_printk("cpu=%d load_avg=%lu util_avg=%lu",
 		  __entry->cpu, __entry->load_avg, __entry->util_avg)
 );
+
+/*
+ * Tracepoint for sched_tune_config settings
+ */
+TRACE_EVENT(sched_tune_config,
+
+	TP_PROTO(int boost),
+
+	TP_ARGS(boost),
+
+	TP_STRUCT__entry(
+		__field( int,	boost		)
+	),
+
+	TP_fast_assign(
+		__entry->boost 	= boost;
+	),
+
+	TP_printk("boost=%d ", __entry->boost)
+);
+
 #endif /* _TRACE_SCHED_H */
 
 /* This part must be outside protection */

kernel/sched/tune.c

@@ -7,6 +7,8 @@
 #include <linux/rcupdate.h>
 #include <linux/slab.h>
 
+#include <trace/events/sched.h>
+
 #include "sched.h"
 
 unsigned int sysctl_sched_cfs_boost __read_mostly;
@@ -392,6 +394,8 @@ boost_write(struct cgroup_subsys_state *css, struct cftype *cft,
 	/* Update CPU boost */
 	schedtune_boostgroup_update(st->idx, st->boost);
 
+	trace_sched_tune_config(st->boost);
+
 	return 0;
 }