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perf stat: Fix duration_time value for higher intervals

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[ 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: b90f1333ef ("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>
This commit is contained in:
Jiri Olsa 2020-05-18 15:14:45 +02:00 • committed by Greg Kroah-Hartman
commit b10dd4b3c1
1 changed files with 1 additions and 1 deletions
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2
tools/perf/builtin-stat.c
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@ -351,7 +351,7 @@ 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);
}