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Commit 0807d2d8 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf evsel: Know if byte swap is needed 

Instead of passing it around for parsing as an explicit parameter, will
help with reading tracepoint fields when not using a perf session or
pevent structure, i.e. for non perf.data centered workflows.

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-qa67ikv2sm49cwa7dyjhhp6g@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a14bb7a6

tools/perf/builtin-test.c

+2 −2
Original line number Diff line number Diff line
@@ -564,7 +564,7 @@ static int test__basic_mmap(void) 
			goto out_munmap;

		}



		err = perf_evlist__parse_sample(evlist, event, &sample, false);

		err = perf_evlist__parse_sample(evlist, event, &sample);

		if (err) {

			pr_err("Can't parse sample, err = %d\n", err);

			goto out_munmap;
@@ -781,7 +781,7 @@ static int test__PERF_RECORD(void) 
				if (type < PERF_RECORD_MAX)

					nr_events[type]++;



				err = perf_evlist__parse_sample(evlist, event, &sample, false);

				err = perf_evlist__parse_sample(evlist, event, &sample);

				if (err < 0) {

					if (verbose)

						perf_event__fprintf(event, stderr);

tools/perf/builtin-top.c

+1 −1
Original line number Diff line number Diff line
@@ -823,7 +823,7 @@ 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_evlist__parse_sample(top->evlist, event, &sample, false);

		ret = perf_evlist__parse_sample(top->evlist, event, &sample);

		if (ret) {

			pr_err("Can't parse sample, err = %d\n", ret);

			continue;

tools/perf/util/evlist.c

+2 −2
Original line number Diff line number Diff line
@@ -884,10 +884,10 @@ int perf_evlist__start_workload(struct perf_evlist *evlist) 
}



int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,

			      struct perf_sample *sample, bool swapped)

			      struct perf_sample *sample)

{

	struct perf_evsel *evsel = perf_evlist__first(evlist);

	return perf_evsel__parse_sample(evsel, event, sample, swapped);

	return perf_evsel__parse_sample(evsel, event, sample);

}



size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp)

tools/perf/util/evlist.h

+1 −1
Original line number Diff line number Diff line
@@ -125,7 +125,7 @@ bool perf_evlist__sample_id_all(struct perf_evlist *evlist); 
u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist);



int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,

			      struct perf_sample *sample, bool swapped);

			      struct perf_sample *sample);



bool perf_evlist__valid_sample_type(struct perf_evlist *evlist);

bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist);

tools/perf/util/evsel.c

+8 −5
Original line number Diff line number Diff line
@@ -767,11 +767,13 @@ int perf_evsel__open_per_thread(struct perf_evsel *evsel, 
	return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);

}



static int perf_event__parse_id_sample(const union perf_event *event, u64 type,

				       struct perf_sample *sample,

				       bool swapped)

static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,

				       const union perf_event *event,

				       struct perf_sample *sample)

{

	u64 type = evsel->attr.sample_type;

	const u64 *array = event->sample.array;

	bool swapped = evsel->needs_swap;

	union u64_swap u;



	array += ((event->header.size -
@@ -832,10 +834,11 @@ static bool sample_overlap(const union perf_event *event, 
}



int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,

			     struct perf_sample *data, bool swapped)

			     struct perf_sample *data)

{

	u64 type = evsel->attr.sample_type;

	u64 regs_user = evsel->attr.sample_regs_user;

	bool swapped = evsel->needs_swap;

	const u64 *array;



	/*
@@ -852,7 +855,7 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, 
	if (event->header.type != PERF_RECORD_SAMPLE) {

		if (!evsel->attr.sample_id_all)

			return 0;

		return perf_event__parse_id_sample(event, type, data, swapped);

		return perf_evsel__parse_id_sample(evsel, event, data);

	}



	array = event->sample.array;