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authorArnaldo Carvalho de Melo <acme@redhat.com>2012-09-26 12:48:18 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-09-26 12:48:18 -0300
commit0807d2d8a381f4fc600ad481c3e77e5cdb624eed (patch)
tree3cd46552cea3e1a9c7c872250f790cb180f6cccf
parenta14bb7a6fd4a3d563ca971daf462ba4dc294a7a6 (diff)
downloadlinux-linaro-stable-0807d2d8a381f4fc600ad481c3e77e5cdb624eed.tar.gz
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: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/builtin-test.c4
-rw-r--r--tools/perf/builtin-top.c2
-rw-r--r--tools/perf/util/evlist.c4
-rw-r--r--tools/perf/util/evlist.h2
-rw-r--r--tools/perf/util/evsel.c13
-rw-r--r--tools/perf/util/evsel.h3
-rw-r--r--tools/perf/util/header.c6
-rw-r--r--tools/perf/util/python.c2
-rw-r--r--tools/perf/util/session.c6
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;