perf evlist: Introduce perf_evlist__parse_sample

That is a more compact form of perf_session__parse_sample and to support
multiple evlists per perf_session is the way to go anyway.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-vkxx3j5qktoj11bvcwmfjj13@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-test.c

@@ -562,9 +562,7 @@ static int test__basic_mmap(void)
 			goto out_munmap;
 		}
 
-		err = perf_event__parse_sample(event, attr.sample_type,
+		err = perf_evlist__parse_sample(evlist, event, &sample, false);
-					       evsels[0]->sample_size,
-					       false, &sample, false);
 		if (err) {
 			pr_err("Can't parse sample, err = %d\n", err);
 			goto out_munmap;
@@ -781,9 +779,7 @@ static int test__PERF_RECORD(void)
 				if (type < PERF_RECORD_MAX)
 					nr_events[type]++;
 
-				err = perf_event__parse_sample(event, evsel->attr.sample_type,
+				err = perf_evlist__parse_sample(evlist, event, &sample, false);
-							       evsel->sample_size, true,
-							       &sample, false);
 				if (err < 0) {
 					if (verbose)
 						perf_event__fprintf(event, stderr);

tools/perf/builtin-top.c

@@ -811,7 +811,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
 	int ret;
 
 	while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
-		ret = perf_session__parse_sample(session, event, &sample);
+		ret = perf_evlist__parse_sample(top->evlist, event, &sample, false);
 		if (ret) {
 			pr_err("Can't parse sample, err = %d\n", ret);
 			continue;

tools/perf/util/evlist.c

@@ -881,3 +881,12 @@ int perf_evlist__start_workload(struct perf_evlist *evlist)
 
 	return 0;
 }
+
+int perf_evlist__parse_sample(struct perf_evlist *evlist,
+			      const union perf_event *event,
+			      struct perf_sample *sample, bool swapped)
+{
+	struct perf_evsel *e = list_entry(evlist->entries.next, struct perf_evsel, node);
+	return perf_event__parse_sample(event, e->attr.sample_type, e->sample_size,
+					e->attr.sample_id_all, sample, swapped);
+}

tools/perf/util/evlist.h

@@ -122,6 +122,10 @@ u64 perf_evlist__sample_type(const struct perf_evlist *evlist);
 bool perf_evlist__sample_id_all(const const struct perf_evlist *evlist);
 u16 perf_evlist__id_hdr_size(const struct perf_evlist *evlist);
 
+int perf_evlist__parse_sample(struct perf_evlist *evlist,
+			      const union perf_event *event,
+			      struct perf_sample *sample, bool swapped);
+
 bool perf_evlist__valid_sample_type(const struct perf_evlist *evlist);
 bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist);
 

tools/perf/util/python.c

@@ -797,17 +797,13 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
 
 	event = perf_evlist__mmap_read(evlist, cpu);
 	if (event != NULL) {
-		struct perf_evsel *first;
 		PyObject *pyevent = pyrf_event__new(event);
 		struct pyrf_event *pevent = (struct pyrf_event *)pyevent;
 
 		if (pyevent == NULL)
 			return PyErr_NoMemory();
 
-		first = list_entry(evlist->entries.next, struct perf_evsel, node);
+		err = perf_evlist__parse_sample(evlist, event, &pevent->sample, false);
-		err = perf_event__parse_sample(event, first->attr.sample_type,
-					       first->sample_size,
-					       sample_id_all, &pevent->sample, false);
 		if (err)
 			return PyErr_Format(PyExc_OSError,
 					    "perf: can't parse sample, err=%d", err);

tools/perf/util/session.c

@@ -16,19 +16,6 @@
 #include "cpumap.h"
 #include "event-parse.h"
 
-int perf_session__parse_sample(struct perf_session *session,
-			       const union perf_event *event,
-			       struct perf_sample *sample)
-{
-	struct perf_evsel *first;
-	first = list_entry(session->evlist->entries.next, struct perf_evsel, node);
-
-	return perf_event__parse_sample(event, first->attr.sample_type,
-					first->sample_size,
-					first->attr.sample_id_all, sample,
-					session->header.needs_swap);
-}
-
 int perf_session__synthesize_sample(struct perf_session *session,
 				    union perf_event *event,
 				    const struct perf_sample *sample)
@@ -692,7 +679,8 @@ static void flush_sample_queue(struct perf_session *s,
 		if (iter->timestamp > limit)
 			break;
 
-		ret = perf_session__parse_sample(s, iter->event, &sample);
+		ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample,
+						s->header.needs_swap);
 		if (ret)
 			pr_err("Can't parse sample, err = %d\n", ret);
 		else
@@ -1103,7 +1091,8 @@ static int perf_session__process_event(struct perf_session *session,
 	/*
 	 * For all kernel events we get the sample data
 	 */
-	ret = perf_session__parse_sample(session, event, &sample);
+	ret = perf_evlist__parse_sample(session->evlist, event, &sample,
+					session->header.needs_swap);
 	if (ret)
 		return ret;
 

tools/perf/util/session.h

@@ -126,10 +126,6 @@ size_t perf_session__fprintf_dsos_buildid(struct perf_session *self,
 
 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp);
 
-int perf_session__parse_sample(struct perf_session *session,
-			       const union perf_event *event,
-			       struct perf_sample *sample);
-
 int perf_session__synthesize_sample(struct perf_session *session,
 				    union perf_event *event,
 				    const struct perf_sample *sample);