linux-kernel - [PATCH V2 13/22] perf itrace: Add processing for Instruction Tracing events

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Date:	Thu, 20 Nov 2014 15:23:19 +0200
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH V2 13/22] perf itrace: Add processing for Instruction Tracing events

Provide hooks so that an Instruction Trace
decoder can process Instruction Tracing
events.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/util/itrace.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++
 tools/perf/util/itrace.h | 13 +++++++++++++
 2 files changed, 62 insertions(+)

diff --git a/tools/perf/util/itrace.c b/tools/perf/util/itrace.c
index b50d959..eb43a7f 100644
--- a/tools/perf/util/itrace.c
+++ b/tools/perf/util/itrace.c
@@ -599,6 +599,28 @@ out_free:
 	return err;
 }
 
+static bool itrace__dont_decode(struct perf_session *session)
+{
+	return !session->itrace_synth_opts ||
+	       session->itrace_synth_opts->dont_decode;
+}
+
+int perf_event__process_itrace_info(struct perf_tool *tool __maybe_unused,
+				    union perf_event *event,
+				    struct perf_session *session __maybe_unused)
+{
+	enum itrace_type type = event->itrace_info.type;
+
+	if (dump_trace)
+		fprintf(stdout, " type: %u\n", type);
+
+	switch (type) {
+	case PERF_ITRACE_UNKNOWN:
+	default:
+		return -EINVAL;
+	}
+}
+
 int perf_event__synthesize_itrace(struct perf_tool *tool,
 				  perf_event__handler_t process,
 				  size_t size, u64 offset, u64 ref, int idx,
@@ -619,6 +641,30 @@ int perf_event__synthesize_itrace(struct perf_tool *tool,
 	return process(tool, &ev, NULL, NULL);
 }
 
+s64 perf_event__process_itrace(struct perf_tool *tool, union perf_event *event,
+			       struct perf_session *session)
+{
+	s64 err;
+
+	if (dump_trace)
+		fprintf(stdout, " size: %#"PRIx64"  offset: %#"PRIx64"  ref: %#"PRIx64"  idx: %u  tid: %d  cpu: %d\n",
+			event->itrace.size, event->itrace.offset,
+			event->itrace.reference, event->itrace.idx,
+			event->itrace.tid, event->itrace.cpu);
+
+	if (itrace__dont_decode(session))
+		return event->itrace.size;
+
+	if (!session->itrace || event->header.type != PERF_RECORD_ITRACE)
+		return -EINVAL;
+
+	err = session->itrace->process_itrace_event(session, event, tool);
+	if (err < 0)
+		return err;
+
+	return event->itrace.size;
+}
+
 #define PERF_ITRACE_DEFAULT_PERIOD_TYPE		PERF_ITRACE_PERIOD_NANOSECS
 #define PERF_ITRACE_DEFAULT_PERIOD		100000
 #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ	16
@@ -764,6 +810,9 @@ int perf_event__process_itrace_error(struct perf_tool *tool __maybe_unused,
 				     union perf_event *event,
 				     struct perf_session *session)
 {
+	if (itrace__dont_decode(session))
+		return 0;
+
 	if (session->itrace)
 		session->itrace->error_count += 1;
 
diff --git a/tools/perf/util/itrace.h b/tools/perf/util/itrace.h
index a7d4ad2..575037c 100644
--- a/tools/perf/util/itrace.h
+++ b/tools/perf/util/itrace.h
@@ -34,6 +34,10 @@ struct option;
 struct record_opts;
 struct itrace_info_event;
 
+enum itrace_type {
+	PERF_ITRACE_UNKNOWN,
+};
+
 enum itrace_error_type {
 	PERF_ITRACE_DECODER_ERROR = 1,
 };
@@ -90,6 +94,9 @@ struct itrace {
 			     union perf_event *event,
 			     struct perf_sample *sample,
 			     struct perf_tool *tool);
+	int (*process_itrace_event)(struct perf_session *session,
+				    union perf_event *event,
+				    struct perf_tool *tool);
 	int (*flush_events)(struct perf_session *session,
 			    struct perf_tool *tool);
 	void (*free_events)(struct perf_session *session);
@@ -330,10 +337,16 @@ int perf_event__synthesize_itrace_info(struct itrace_record *itr,
 				       struct perf_tool *tool,
 				       struct perf_session *session,
 				       perf_event__handler_t process);
+int perf_event__process_itrace_info(struct perf_tool *tool,
+				    union perf_event *event,
+				    struct perf_session *session);
 int perf_event__synthesize_itrace(struct perf_tool *tool,
 				  perf_event__handler_t process,
 				  size_t size, u64 offset, u64 ref, int idx,
 				  u32 tid, u32 cpu);
+s64 perf_event__process_itrace(struct perf_tool *tool,
+			       union perf_event *event,
+			       struct perf_session *session);
 int perf_event__process_itrace_error(struct perf_tool *tool,
 				     union perf_event *event,
 				     struct perf_session *session);
-- 
1.9.1

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