[tip: perf/core] perf top: Show info message while collecting samples

[tip-bot2 for Arnaldo Carvalho de Melo]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     5c959b6d8f9369e42a3cb0423bcce9ac069cee55
Gitweb:        https://git.kernel.org/tip/5c959b6d8f9369e42a3cb0423bcce9ac069cee55
Author:        Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate:    Mon, 19 Aug 2019 16:48:25 -03:00
Committer:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Tue, 20 Aug 2019 12:22:39 -03:00

perf top: Show info message while collecting samples

Give visual cue about what is happening while initially collecting the
minimal set of samples to collect/sort/display.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-xcui60p1v6ozijfam2o89ya8@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/ui/browsers/hists.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index b195b1b..30547fd 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -2894,6 +2894,9 @@ static int perf_evsel__hists_browse(struct evsel *evsel, int nr_events,
 	if (symbol_conf.col_width_list_str)
 		perf_hpp__set_user_width(symbol_conf.col_width_list_str);
 
+	if (!is_report_browser(hbt))
+		browser->b.no_samples_msg = "Collecting samples...";
+
 	while (1) {
 		struct thread *thread = NULL;
 		struct map *map = NULL;