[PATCH] perf report: Check percent limit of single callchain on stdio

[Namhyung Kim]

While previous commit ("perf report: Apply callchain percent limit
on --stdio") checked percent limit of callchain, it missed to check a
single-path callchains.  It resulted in showing callchains under the
limit if an entry has only single path of call graph.

Reported-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
 tools/perf/ui/stdio/hist.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index eae25efa684e..35964579627b 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -199,6 +199,7 @@ static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
 	int i = 0;
 	int ret = 0;
 	char bf[1024];
+	double percent;
 
 	/*
 	 * If have one single callchain root, don't bother printing
@@ -208,6 +209,11 @@ static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
 	node = rb_first(root);
 	if (node && !rb_next(node)) {
 		cnode = rb_entry(node, struct callchain_node, rb_node);
+
+		percent = 100.0 * callchain_cumul_hits(cnode) / total_samples;
+		if (percent < callchain_param.min_percent)
+			return 0;
+
 		list_for_each_entry(chain, &cnode->val, list) {
 			/*
 			 * If we sort by symbol, the first entry is the same than
-- 
2.6.4