perf top: Fix refreshing hierarchy entries on TUI

commit c611152373e84a7677cd7d496e849de4debdab66 upstream.

Markus reported that 'perf top --hierarchy' cannot scroll down after
refresh.  This was because the number of entries are not updated when
hierarchy is enabled.

Unlike normal report view, hierarchy mode needs to keep its own entry
count since it can have non-leaf entries which can expand/collapse.

Reported-and-Tested-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Fixes: f5b763feebe9 ("perf hists browser: Count number of hierarchy entries")
Link: http://lkml.kernel.org/r/20161007050412.3000-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 7aee954b307fadc9e19fc57ffa9a6cc6c644ca3f..4ad1eac23f6637dd8f33a330c01b3e883dc9aff7 100644 (file)
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -595,7 +595,8 @@ int hist_browser__run(struct hist_browser *browser, const char *help)
                        u64 nr_entries;
                        hbt->timer(hbt->arg);
 
-                       if (hist_browser__has_filter(browser))
+                       if (hist_browser__has_filter(browser) ||
+                           symbol_conf.report_hierarchy)
                                hist_browser__update_nr_entries(browser);
 
                        nr_entries = hist_browser__nr_entries(browser);