linux-kernel - [PATCH 3/6] perf: add reference time event

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Message-Id: <1307490946-24673-1-git-send-email-dsahern@gmail.com>
Date:	Tue,  7 Jun 2011 17:55:46 -0600
From:	David Ahern <dsahern@...il.com>
To:	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	acme@...stprotocols.net, mingo@...e.hu, peterz@...radead.org,
	fweisbec@...il.com, paulus@...ba.org, tglx@...utronix.de,
	David Ahern <dsahern@...il.com>
Subject: [PATCH 3/6] perf: add reference time event

For initial perf_clock to time-of-day correlation.

Signed-off-by: David Ahern <dsahern@...il.com>
---
 tools/perf/util/event.c   |    1 +
 tools/perf/util/event.h   |    8 ++++++++
 tools/perf/util/session.c |    4 ++++
 tools/perf/util/session.h |    3 ++-
 4 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 3c1b8a6..1a89a04 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -24,6 +24,7 @@ static const char *perf_event__names[] = {
 	[PERF_RECORD_HEADER_TRACING_DATA]	= "TRACING_DATA",
 	[PERF_RECORD_HEADER_BUILD_ID]		= "BUILD_ID",
 	[PERF_RECORD_FINISHED_ROUND]		= "FINISHED_ROUND",
+	[PERF_RECORD_REFTIME]			= "REF_TIME",
 };
 
 const char *perf_event__name(unsigned int id)
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 1d7f664..f481f90 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -98,6 +98,7 @@ enum perf_user_event_type { /* above any possible kernel type */
 	PERF_RECORD_HEADER_TRACING_DATA		= 66,
 	PERF_RECORD_HEADER_BUILD_ID		= 67,
 	PERF_RECORD_FINISHED_ROUND		= 68,
+	PERF_RECORD_REFTIME			= 69,
 	PERF_RECORD_HEADER_MAX
 };
 
@@ -124,6 +125,12 @@ struct tracing_data_event {
 	u32 size;
 };
 
+struct reftime_event {
+	struct perf_event_header header;
+	struct timeval tv;
+	u64 nsec;
+};
+
 union perf_event {
 	struct perf_event_header	header;
 	struct ip_event			ip;
@@ -137,6 +144,7 @@ union perf_event {
 	struct event_type_event		event_type;
 	struct tracing_data_event	tracing_data;
 	struct build_id_event		build_id;
+	struct reftime_event		reftime;
 };
 
 void perf_event__print_totals(void);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index b723f21..322632c 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -792,6 +792,10 @@ static int perf_session__process_user_event(struct perf_session *session, union
 		return ops->build_id(event, session);
 	case PERF_RECORD_FINISHED_ROUND:
 		return ops->finished_round(event, session, ops);
+	case PERF_RECORD_REFTIME:
+		if (ops->reftime)
+			return ops->reftime(event, session);
+		return -EINVAL;
 	default:
 		return -EINVAL;
 	}
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index de4178d..9728701 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -81,7 +81,8 @@ struct perf_event_ops {
 	event_synth_op	attr,
 			event_type,
 			tracing_data,
-			build_id;
+			build_id,
+			reftime;
 	event_op2	finished_round;
 	bool		ordered_samples;
 	bool		ordering_requires_timestamps;
-- 
1.7.5.2

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