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-rw-r--r--include/trace/events/power.h51
-rw-r--r--kernel/power/qos.c3
2 files changed, 54 insertions, 0 deletions
diff --git a/include/trace/events/power.h b/include/trace/events/power.h
index 427acab5d69..f1e73bd04be 100644
--- a/include/trace/events/power.h
+++ b/include/trace/events/power.h
@@ -5,6 +5,7 @@
#define _TRACE_POWER_H
#include <linux/ktime.h>
+#include <linux/pm_qos.h>
#include <linux/tracepoint.h>
DECLARE_EVENT_CLASS(cpu,
@@ -177,6 +178,56 @@ DEFINE_EVENT(power_domain, power_domain_target,
TP_ARGS(name, state, cpu_id)
);
+
+/*
+ * The pm qos events are used for pm qos update
+ */
+DECLARE_EVENT_CLASS(pm_qos_update,
+
+ TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value),
+
+ TP_ARGS(action, prev_value, curr_value),
+
+ TP_STRUCT__entry(
+ __field( enum pm_qos_req_action, action )
+ __field( int, prev_value )
+ __field( int, curr_value )
+ ),
+
+ TP_fast_assign(
+ __entry->action = action;
+ __entry->prev_value = prev_value;
+ __entry->curr_value = curr_value;
+ ),
+
+ TP_printk("action=%s prev_value=%d curr_value=%d",
+ __print_symbolic(__entry->action,
+ { PM_QOS_ADD_REQ, "ADD_REQ" },
+ { PM_QOS_UPDATE_REQ, "UPDATE_REQ" },
+ { PM_QOS_REMOVE_REQ, "REMOVE_REQ" }),
+ __entry->prev_value, __entry->curr_value)
+);
+
+DEFINE_EVENT(pm_qos_update, pm_qos_update_target,
+
+ TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value),
+
+ TP_ARGS(action, prev_value, curr_value)
+);
+
+DEFINE_EVENT_PRINT(pm_qos_update, pm_qos_update_flags,
+
+ TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value),
+
+ TP_ARGS(action, prev_value, curr_value),
+
+ TP_printk("action=%s prev_value=0x%x curr_value=0x%x",
+ __print_symbolic(__entry->action,
+ { PM_QOS_ADD_REQ, "ADD_REQ" },
+ { PM_QOS_UPDATE_REQ, "UPDATE_REQ" },
+ { PM_QOS_REMOVE_REQ, "REMOVE_REQ" }),
+ __entry->prev_value, __entry->curr_value)
+);
#endif /* _TRACE_POWER_H */
/* This part must be outside protection */
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index f2f5f6e22a3..4fb8d142793 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -44,6 +44,7 @@
#include <linux/uaccess.h>
#include <linux/export.h>
+#include <trace/events/power.h>
/*
* locking rule: all changes to constraints or notifiers lists
@@ -202,6 +203,7 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
spin_unlock_irqrestore(&pm_qos_lock, flags);
+ trace_pm_qos_update_target(action, prev_value, curr_value);
if (prev_value != curr_value) {
blocking_notifier_call_chain(c->notifiers,
(unsigned long)curr_value,
@@ -272,6 +274,7 @@ bool pm_qos_update_flags(struct pm_qos_flags *pqf,
spin_unlock_irqrestore(&pm_qos_lock, irqflags);
+ trace_pm_qos_update_flags(action, prev_value, curr_value);
return prev_value != curr_value;
}