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authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>2009-08-10 10:51:23 +0800
committerThomas Gleixner <tglx@linutronix.de>2009-08-29 14:10:06 +0200
commitc6a2a1770245f654f35f60e1458d4356680f9519 (patch)
tree0a015269ca839ac2fe91b3d86955997bf7b8686d /include/trace
parent2b022e3d4bf9885f781221c59d86283a2cdfc2ed (diff)
hrtimer: Add tracepoint for hrtimers
Add tracepoints which cover the life cycle of a hrtimer. The tracepoints are integrated with the already existing debug_object debug points as far as possible. [ tglx: Fixed comments, made output conistent, easier to read and parse. Fixed output for 32bit archs which do not use the scalar representation of ktime_t. Hand current time to trace_hrtimer_expiry_entry instead of calling get_time() inside of the trace assignment. ] Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Anton Blanchard <anton@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Zhaolei <zhaolei@cn.fujitsu.com> LKML-Reference: <4A7F8B2B.5020908@cn.fujitsu.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/timer.h139
1 files changed, 139 insertions, 0 deletions
diff --git a/include/trace/events/timer.h b/include/trace/events/timer.h
index 725892a93b49..df3c07fa0cb8 100644
--- a/include/trace/events/timer.h
+++ b/include/trace/events/timer.h
@@ -5,6 +5,7 @@
#define _TRACE_TIMER_H
#include <linux/tracepoint.h>
+#include <linux/hrtimer.h>
#include <linux/timer.h>
/**
@@ -131,6 +132,144 @@ TRACE_EVENT(timer_cancel,
TP_printk("timer %p", __entry->timer)
);
+/**
+ * hrtimer_init - called when the hrtimer is initialized
+ * @timer: pointer to struct hrtimer
+ * @clockid: the hrtimers clock
+ * @mode: the hrtimers mode
+ */
+TRACE_EVENT(hrtimer_init,
+
+ TP_PROTO(struct hrtimer *timer, clockid_t clockid,
+ enum hrtimer_mode mode),
+
+ TP_ARGS(timer, clockid, mode),
+
+ TP_STRUCT__entry(
+ __field( void *, timer )
+ __field( clockid_t, clockid )
+ __field( enum hrtimer_mode, mode )
+ ),
+
+ TP_fast_assign(
+ __entry->timer = timer;
+ __entry->clockid = clockid;
+ __entry->mode = mode;
+ ),
+
+ TP_printk("hrtimer %p, clockid %s, mode %s", __entry->timer,
+ __entry->clockid == CLOCK_REALTIME ?
+ "CLOCK_REALTIME" : "CLOCK_MONOTONIC",
+ __entry->mode == HRTIMER_MODE_ABS ?
+ "HRTIMER_MODE_ABS" : "HRTIMER_MODE_REL")
+);
+
+/**
+ * hrtimer_start - called when the hrtimer is started
+ * @timer: pointer to struct hrtimer
+ */
+TRACE_EVENT(hrtimer_start,
+
+ TP_PROTO(struct hrtimer *timer),
+
+ TP_ARGS(timer),
+
+ TP_STRUCT__entry(
+ __field( void *, timer )
+ __field( void *, function )
+ __field( s64, expires )
+ __field( s64, softexpires )
+ ),
+
+ TP_fast_assign(
+ __entry->timer = timer;
+ __entry->function = timer->function;
+ __entry->expires = hrtimer_get_expires(timer).tv64;
+ __entry->softexpires = hrtimer_get_softexpires(timer).tv64;
+ ),
+
+ TP_printk("hrtimer %p, func %pf, expires %llu, softexpires %llu",
+ __entry->timer, __entry->function,
+ (unsigned long long)ktime_to_ns((ktime_t) {
+ .tv64 = __entry->expires }),
+ (unsigned long long)ktime_to_ns((ktime_t) {
+ .tv64 = __entry->softexpires }))
+);
+
+/**
+ * htimmer_expire_entry - called immediately before the hrtimer callback
+ * @timer: pointer to struct hrtimer
+ * @now: pointer to variable which contains current time of the
+ * timers base.
+ *
+ * Allows to determine the timer latency.
+ */
+TRACE_EVENT(hrtimer_expire_entry,
+
+ TP_PROTO(struct hrtimer *timer, ktime_t *now),
+
+ TP_ARGS(timer, now),
+
+ TP_STRUCT__entry(
+ __field( void *, timer )
+ __field( s64, now )
+ ),
+
+ TP_fast_assign(
+ __entry->timer = timer;
+ __entry->now = now->tv64;
+ ),
+
+ TP_printk("hrtimer %p, now %llu", __entry->timer,
+ (unsigned long long)ktime_to_ns((ktime_t) {
+ .tv64 = __entry->now }))
+ );
+
+/**
+ * hrtimer_expire_exit - called immediately after the hrtimer callback returns
+ * @timer: pointer to struct hrtimer
+ *
+ * When used in combination with the hrtimer_expire_entry tracepoint we can
+ * determine the runtime of the callback function.
+ */
+TRACE_EVENT(hrtimer_expire_exit,
+
+ TP_PROTO(struct hrtimer *timer),
+
+ TP_ARGS(timer),
+
+ TP_STRUCT__entry(
+ __field( void *, timer )
+ ),
+
+ TP_fast_assign(
+ __entry->timer = timer;
+ ),
+
+ TP_printk("hrtimer %p", __entry->timer)
+);
+
+/**
+ * hrtimer_cancel - called when the hrtimer is canceled
+ * @timer: pointer to struct hrtimer
+ */
+TRACE_EVENT(hrtimer_cancel,
+
+ TP_PROTO(struct hrtimer *timer),
+
+ TP_ARGS(timer),
+
+ TP_STRUCT__entry(
+ __field( void *, timer )
+ ),
+
+ TP_fast_assign(
+ __entry->timer = timer;
+ ),
+
+ TP_printk("hrtimer %p", __entry->timer)
+);
+
#endif /* _TRACE_TIMER_H */
/* This part must be outside protection */