[tip: perf/urgent] perf tools: Fix time sorting

[tip-bot2 for Jiri Olsa]

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

Commit-ID:     722ddfde366fd46205456a9c5ff9b3359dc9a75e
Gitweb:        https://git.kernel.org/tip/722ddfde366fd46205456a9c5ff9b3359dc9a75e
Author:        Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate:    Tue, 05 Nov 2019 00:27:11 +01:00
Committer:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Tue, 05 Nov 2019 08:49:14 -03:00

perf tools: Fix time sorting

The final sort might get confused when the comparison is done over
bigger numbers than int like for -s time.

Check the following report for longer workloads:

  $ perf report -s time -F time,overhead --stdio

Fix hist_entry__sort() to properly return int64_t and not possible cut
int.

Fixes: 043ca389a318 ("perf tools: Use hpp formats to sort final output")
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Reviewed-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Michael Petlan <mpetlan@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v3.16+
Link: http://lore.kernel.org/lkml/20191104232711.16055-1-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/hist.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 679a1d7..7b6eaf5 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1625,7 +1625,7 @@ int hists__collapse_resort(struct hists *hists, struct ui_progress *prog)
 	return 0;
 }
 
-static int hist_entry__sort(struct hist_entry *a, struct hist_entry *b)
+static int64_t hist_entry__sort(struct hist_entry *a, struct hist_entry *b)
 {
 	struct hists *hists = a->hists;
 	struct perf_hpp_fmt *fmt;