From: Jiri Olsa jolsa@kernel.org
commit 722ddfde366fd46205456a9c5ff9b3359dc9a75e upstream.
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@kernel.org Reviewed-by: Andi Kleen ak@linux.intel.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Michael Petlan mpetlan@redhat.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: stable@vger.kernel.org # v3.16+ Link: http://lore.kernel.org/lkml/20191104232711.16055-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- tools/perf/util/hist.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -1080,7 +1080,7 @@ void hists__collapse_resort(struct hists } }
-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 perf_hpp_fmt *fmt; int64_t cmp = 0;