From 0807d2d8a381f4fc600ad481c3e77e5cdb624eed Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Wed, 26 Sep 2012 12:48:18 -0300 Subject: [PATCH] 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 Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-qa67ikv2sm49cwa7dyjhhp6g@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-test.c | 4 ++-- tools/perf/builtin-top.c | 2 +- tools/perf/util/evlist.c | 4 ++-- tools/perf/util/evlist.h | 2 +- tools/perf/util/evsel.c | 13 ++++++++----- tools/perf/util/evsel.h | 3 ++- tools/perf/util/header.c | 6 +++++- tools/perf/util/python.c | 2 +- tools/perf/util/session.c | 6 ++---- 9 files changed, 24 insertions(+), 18 deletions(-) diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c index 78b47a75a7c9..2fd2c031f627 100644 --- a/tools/perf/builtin-test.c +++ b/tools/perf/builtin-test.c @@ -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); diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 5550754c05f2..e434a16bb5ac 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -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; diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 27f6de3aab16..704bd91ce05d 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -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) diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index 3f2e1e4ccdd5..008a95702bf7 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -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); diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 2467eaf2968f..fe9581b0323c 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -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; diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index bb445d1cbc7b..60d28853748e 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -69,6 +69,7 @@ struct perf_evsel { struct cpu_map *cpus; unsigned int sample_size; bool supported; + bool needs_swap; /* parse modifier helper */ int exclude_GH; struct perf_evsel *leader; @@ -205,7 +206,7 @@ static inline int perf_evsel__read_scaled(struct perf_evsel *evsel, void hists__init(struct hists *hists); int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, - struct perf_sample *sample, bool swapped); + struct perf_sample *sample); static inline struct perf_evsel *perf_evsel__next(struct perf_evsel *evsel) { diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 6aae3290358e..7daad237dea5 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -1256,8 +1256,10 @@ read_event_desc(struct perf_header *ph, int fd) if (ret != (ssize_t)sizeof(nr)) goto error; - if (ph->needs_swap) + if (ph->needs_swap) { nr = bswap_32(nr); + evsel->needs_swap = true; + } evsel->name = do_read_string(fd, ph); @@ -2626,6 +2628,8 @@ int perf_session__read_header(struct perf_session *session, int fd) if (evsel == NULL) goto out_delete_evlist; + + evsel->needs_swap = header->needs_swap; /* * Do it before so that if perf_evsel__alloc_id fails, this * entry gets purged too at perf_evlist__delete(). diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index ca85444bcfbf..9181bf212fb9 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -805,7 +805,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist, if (pyevent == NULL) return PyErr_NoMemory(); - err = perf_evlist__parse_sample(evlist, event, &pevent->sample, false); + err = perf_evlist__parse_sample(evlist, event, &pevent->sample); if (err) return PyErr_Format(PyExc_OSError, "perf: can't parse sample, err=%d", err); diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 3049b0ae7003..8cdd23239c90 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -722,8 +722,7 @@ static int flush_sample_queue(struct perf_session *s, if (iter->timestamp > limit) break; - ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample, - s->header.needs_swap); + ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample); if (ret) pr_err("Can't parse sample, err = %d\n", ret); else { @@ -1174,8 +1173,7 @@ static int perf_session__process_event(struct perf_session *session, /* * For all kernel events we get the sample data */ - ret = perf_evlist__parse_sample(session->evlist, event, &sample, - session->header.needs_swap); + ret = perf_evlist__parse_sample(session->evlist, event, &sample); if (ret) return ret; -- 2.30.2