linux-kernel - [tip:perf/urgent] perf hists: Fix column length on --hierarchy

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Date:   Sat, 12 Nov 2016 02:54:39 -0800
From:   tip-bot for Namhyung Kim <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     hpa@...or.com, acme@...hat.com, namhyung@...nel.org,
        jolsa@...nel.org, linux-kernel@...r.kernel.org,
        peterz@...radead.org, tglx@...utronix.de, markus@...ppelsdorf.de,
        mingo@...nel.org
Subject: [tip:perf/urgent] perf hists: Fix column length on --hierarchy

Commit-ID:  c72ab446cac1d6c9551fd26c4cfef1b2fc5041fd
Gitweb:     http://git.kernel.org/tip/c72ab446cac1d6c9551fd26c4cfef1b2fc5041fd
Author:     Namhyung Kim <namhyung@...nel.org>
AuthorDate: Tue, 8 Nov 2016 22:08:33 +0900
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 9 Nov 2016 11:55:29 -0300

perf hists: Fix column length on --hierarchy

Markus reported that there's a weird behavior on perf top --hierarchy
regarding the column length.

Looking at the code, I found a dubious code which affects the symptoms.
When --hierarchy option is used, the last column length might be
inaccurate since it skips to update the length on leaf entries.

I cannot remember why it did and looks like a leftover from previous
version during the development.

Anyway, updating the column length often is not harmful.  So let's move
the code out.

Reported-and-Tested-by: Markus Trippelsdorf <markus@...ppelsdorf.de>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Fixes: 1a3906a7e6b9 ("perf hists: Resort hist entries with hierarchy")
Link: http://lkml.kernel.org/r/20161108130833.9263-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/hist.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index b02992e..a69f027 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1600,18 +1600,18 @@ static void hists__hierarchy_output_resort(struct hists *hists,
 		if (prog)
 			ui_progress__update(prog, 1);
 
+		hists->nr_entries++;
+		if (!he->filtered) {
+			hists->nr_non_filtered_entries++;
+			hists__calc_col_len(hists, he);
+		}
+
 		if (!he->leaf) {
 			hists__hierarchy_output_resort(hists, prog,
 						       &he->hroot_in,
 						       &he->hroot_out,
 						       min_callchain_hits,
 						       use_callchain);
-			hists->nr_entries++;
-			if (!he->filtered) {
-				hists->nr_non_filtered_entries++;
-				hists__calc_col_len(hists, he);
-			}
-
 			continue;
 		}