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| author | Jiri Olsa <jolsa@kernel.org> | 2020-05-18 15:14:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-01 13:14:46 +0200 |
| commit | d911653688c588c22bdbc83459f87961c9d4399e (patch) | |
| tree | 2978a5a72f91541b2d0a634888c307ac9a8e877f /tools/perf | |
| parent | aa0d162b9fae4cc8cb01a2f0326777dca59f9ec2 (diff) | |
| download | linux-rt-d911653688c588c22bdbc83459f87961c9d4399e.tar.gz | |
perf stat: Fix duration_time value for higher intervals
[ Upstream commit ea9eb1f456a08c18feb485894185f7a4e31cc8a4 ]
Joakim reported wrong duration_time value for interval bigger
than 4000 [1].
The problem is in the interval value we pass to update_stats
function, which is typed as 'unsigned int' and overflows when
we get over 2^32 (happens between intervals 4000 and 5000).
Retyping the passed value to unsigned long long.
[1] https://www.spinics.net/lists/linux-perf-users/msg11777.html
Fixes: b90f1333ef08 ("perf stat: Update walltime_nsecs_stats in interval mode")
Reported-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200518131445.3745083-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-stat.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 6aae10ff954c..adabe9d4dc86 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -422,7 +422,7 @@ static void process_interval(void) } init_stats(&walltime_nsecs_stats); - update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000); + update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL); print_counters(&rs, 0, NULL); } |