[PATCH 10/12] perf report: Show leader events only when event group is enabled

[Namhyung Kim <namhyung@kernel.org>]

From: Namhyung Kim <namhyung.kim@lge.com>

Since we have all necessary information in the leader events and
other members don't, show only leaders.

Cc: Stephane Eranian <eranian@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/builtin-report.c    |    4 ++++
 tools/perf/ui/browsers/hists.c |   38 ++++++++++++++++++++++++++++++++------
 tools/perf/ui/gtk/browser.c    |    4 ++++
 3 files changed, 40 insertions(+), 6 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 46ed9c2ad4ed..6f34a2d6e5a8 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -318,6 +318,10 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
 		struct hists *hists = &pos->hists;
 		const char *evname = perf_evsel__name(pos);
 
+		if (symbol_conf.report_group &&
+		    !perf_evsel__is_group_leader(pos))
+			continue;
+
 		hists__fprintf_nr_sample_events(hists, evname, stdout);
 		hists__fprintf(hists, NULL, false, true, 0, 0, stdout);
 		fprintf(stdout, "\n\n");
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index bdb1b2f9f819..dbd6995609bf 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1567,8 +1567,18 @@ out:
 	return key;
 }
 
+static bool filter_group_entries(struct ui_browser *self __used, void *entry)
+{
+	struct perf_evsel *evsel = list_entry(entry, struct perf_evsel, node);
+
+	if (symbol_conf.report_group && !perf_evsel__is_group_leader(evsel))
+		return true;
+
+	return false;
+}
+
 static int __perf_evlist__tui_browse_hists(struct perf_evlist *evlist,
-					   const char *help,
+					   int nr_entries, const char *help,
 					   void(*timer)(void *arg), void *arg,
 					   int delay_secs)
 {
@@ -1579,7 +1589,8 @@ static int __perf_evlist__tui_browse_hists(struct perf_evlist *evlist,
 			.refresh    = ui_browser__list_head_refresh,
 			.seek	    = ui_browser__list_head_seek,
 			.write	    = perf_evsel_menu__write,
-			.nr_entries = evlist->nr_entries,
+			.filter	    = filter_group_entries,
+			.nr_entries = nr_entries,
 			.priv	    = evlist,
 		},
 	};
@@ -1594,7 +1605,7 @@ static int __perf_evlist__tui_browse_hists(struct perf_evlist *evlist,
 			menu.b.width = line_len;
 	}
 
-	return perf_evsel_menu__run(&menu, evlist->nr_entries, help, timer,
+	return perf_evsel_menu__run(&menu, nr_entries, help, timer,
 				    arg, delay_secs);
 }
 
@@ -1602,15 +1613,30 @@ int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
 				  void(*timer)(void *arg), void *arg,
 				  int delay_secs)
 {
-	if (evlist->nr_entries == 1) {
+	int nr_entries = evlist->nr_entries;
+
+single_entry:
+	if (nr_entries == 1) {
 		struct perf_evsel *first = list_entry(evlist->entries.next,
 						      struct perf_evsel, node);
 		const char *ev_name = perf_evsel__name(first);
-		return perf_evsel__hists_browse(first, evlist->nr_entries, help,
+		return perf_evsel__hists_browse(first, nr_entries, help,
 						ev_name, false, timer, arg,
 						delay_secs);
 	}
 
-	return __perf_evlist__tui_browse_hists(evlist, help,
+	if (symbol_conf.report_group) {
+		struct perf_evsel *pos;
+
+		nr_entries = 0;
+		list_for_each_entry(pos, &evlist->entries, node)
+			if (perf_evsel__is_group_leader(pos))
+				nr_entries++;
+
+		if (nr_entries == 1)
+			goto single_entry;
+	}
+
+	return __perf_evlist__tui_browse_hists(evlist, nr_entries, help,
 					       timer, arg, delay_secs);
 }
diff --git a/tools/perf/ui/gtk/browser.c b/tools/perf/ui/gtk/browser.c
index e39c83cd5ac5..cc53a01ba14b 100644
--- a/tools/perf/ui/gtk/browser.c
+++ b/tools/perf/ui/gtk/browser.c
@@ -306,6 +306,10 @@ int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist,
 		GtkWidget *scrolled_window;
 		GtkWidget *tab_label;
 
+		if (symbol_conf.report_group &&
+		    !perf_evsel__is_group_leader(pos))
+			continue;
+
 		scrolled_window = gtk_scrolled_window_new(NULL, NULL);
 
 		gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window),
-- 
1.7.10.4