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Subject[PATCH 16/18] perf report: Show group description when event group is enabled
Date
From: Namhyung Kim <namhyung.kim@lge.com>

When using event group viewer, it's better to show the group
description rather than the leader information alone.

If a leader did not contain any member, it's a non-group event.

Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/builtin-report.c | 15 +++++++++++++++
tools/perf/ui/browsers/hists.c | 25 +++++++++++++++++++++++++
tools/perf/ui/gtk/browser.c | 14 +++++++++++---
tools/perf/util/evsel.c | 25 +++++++++++++++++++++++++
tools/perf/util/evsel.h | 8 ++++++++
5 files changed, 84 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 87af38bd75a8..e5b53f6554f4 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -299,6 +299,21 @@ static size_t hists__fprintf_nr_sample_events(struct hists *self,
char unit;
unsigned long nr_samples = self->stats.nr_events[PERF_RECORD_SAMPLE];
u64 nr_events = self->stats.total_period;
+ struct perf_evsel *evsel = hists_to_evsel(self);
+ char buf[512];
+ size_t size = sizeof(buf);
+
+ if (symbol_conf.event_group && evsel->nr_members > 1) {
+ struct perf_evsel *pos;
+
+ perf_evsel__group_desc(evsel, buf, size);
+ evname = buf;
+
+ for_each_group_member(pos, evsel) {
+ nr_samples += pos->hists.stats.nr_events[PERF_RECORD_SAMPLE];
+ nr_events += pos->hists.stats.total_period;
+ }
+ }

nr_samples = convert_unit(nr_samples, &unit);
ret = fprintf(fp, "# Samples: %lu%c", nr_samples, unit);
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 0d8b0143cd9b..3e31534fcc47 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1211,6 +1211,21 @@ static int hists__browser_title(struct hists *hists, char *bf, size_t size,
const struct thread *thread = hists->thread_filter;
unsigned long nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
u64 nr_events = hists->stats.total_period;
+ struct perf_evsel *evsel = hists_to_evsel(hists);
+ char buf[512];
+ size_t buflen = sizeof(buf);
+
+ if (symbol_conf.event_group && evsel->nr_members > 1) {
+ struct perf_evsel *pos;
+
+ perf_evsel__group_desc(evsel, buf, buflen);
+ ev_name = buf;
+
+ for_each_group_member(pos, evsel) {
+ nr_samples += pos->hists.stats.nr_events[PERF_RECORD_SAMPLE];
+ nr_events += pos->hists.stats.total_period;
+ }
+ }

nr_samples = convert_unit(nr_samples, &unit);
printed = scnprintf(bf, size,
@@ -1607,6 +1622,16 @@ static void perf_evsel_menu__write(struct ui_browser *browser,
ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
HE_COLORSET_NORMAL);

+ if (symbol_conf.event_group && evsel->nr_members > 1) {
+ struct perf_evsel *pos;
+
+ ev_name = perf_evsel__group_name(evsel);
+
+ for_each_group_member(pos, evsel) {
+ nr_events += pos->hists.stats.nr_events[PERF_RECORD_SAMPLE];
+ }
+ }
+
nr_events = convert_unit(nr_events, &unit);
printed = scnprintf(bf, sizeof(bf), "%lu%c%s%s", nr_events,
unit, unit == ' ' ? "" : " ", ev_name);
diff --git a/tools/perf/ui/gtk/browser.c b/tools/perf/ui/gtk/browser.c
index 3b1642dc0e31..e7e11df829ed 100644
--- a/tools/perf/ui/gtk/browser.c
+++ b/tools/perf/ui/gtk/browser.c
@@ -324,10 +324,18 @@ int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist,
const char *evname = perf_evsel__name(pos);
GtkWidget *scrolled_window;
GtkWidget *tab_label;
+ char buf[512];
+ size_t size = sizeof(buf);

- if (symbol_conf.event_group &&
- !perf_evsel__is_group_leader(pos))
- continue;
+ if (symbol_conf.event_group) {
+ if (!perf_evsel__is_group_leader(pos))
+ continue;
+
+ if (pos->nr_members > 1) {
+ perf_evsel__group_desc(pos, buf, size);
+ evname = buf;
+ }
+ }

scrolled_window = gtk_scrolled_window_new(NULL, NULL);

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 73e6085a7294..a35e2547a7eb 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -405,6 +405,31 @@ const char *perf_evsel__name(struct perf_evsel *evsel)
return evsel->name ?: "unknown";
}

+const char *perf_evsel__group_name(struct perf_evsel *evsel)
+{
+ return evsel->group_name ?: "anon group";
+}
+
+int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
+{
+ int ret;
+ struct perf_evsel *pos;
+ const char *group_name = perf_evsel__group_name(evsel);
+
+ ret = scnprintf(buf, size, "%s", group_name);
+
+ ret += scnprintf(buf + ret, size - ret, " { %s",
+ perf_evsel__name(evsel));
+
+ for_each_group_member(pos, evsel)
+ ret += scnprintf(buf + ret, size - ret, ", %s",
+ perf_evsel__name(pos));
+
+ ret += scnprintf(buf + ret, size - ret, " }");
+
+ return ret;
+}
+
/*
* The enable_on_exec/disabled value strategy:
*
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 54a8efbd8dcb..d2d1870928df 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -113,6 +113,8 @@ extern const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX];
int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
char *bf, size_t size);
const char *perf_evsel__name(struct perf_evsel *evsel);
+const char *perf_evsel__group_name(struct perf_evsel *evsel);
+int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size);

int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
@@ -238,4 +240,10 @@ static inline int perf_evsel__group_idx(struct perf_evsel *evsel)
{
return evsel->idx - evsel->leader->idx;
}
+
+#define for_each_group_member(_evsel, _leader) \
+for ((_evsel) = list_entry((_leader)->node.next, struct perf_evsel, node); \
+ (_evsel) && (_evsel)->leader == (_leader); \
+ (_evsel) = list_entry((_evsel)->node.next, struct perf_evsel, node))
+
#endif /* __PERF_EVSEL_H */
--
1.7.11.7


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