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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2009-12-18 13:03:03 -0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-18 16:22:52 +0100 |
| commit | b5b60fda1e462a849bc37dfbace2888191be82cc (patch) | |
| tree | 6b4d1e2811bfa9d003fca6b7a6d11b73ec792919 | |
| parent | 99e8c5a3b875a34d894a711c9a3669858d6adf45 (diff) | |
| download | linux-b5b60fda1e462a849bc37dfbace2888191be82cc.tar.gz linux-b5b60fda1e462a849bc37dfbace2888191be82cc.tar.bz2 linux-b5b60fda1e462a849bc37dfbace2888191be82cc.zip | |
perf session: Make events_stats u64 to avoid overflow on 32-bit arches
Pekka Enberg reported weird percentages in perf report. It
turns out we are overflowing a 32-bit variables in struct
events_stats on 32-bit architectures.
Before:
[acme@ana linux-2.6-tip]$ perf report -i pekka.perf.data 2> /dev/null | head -10
281.96% Xorg b710a561 [.] 0x000000b710a561
140.15% Xorg [kernel] [k] __initramfs_end
51.56% metacity libgobject-2.0.so.0.2000.1 [.] 0x00000000026e46
35.12% evolution libcairo.so.2.10800.6 [.] 0x000000000203bd
33.84% metacity libpthread-2.9.so [.] 0x00000000007a3d
After:
[acme@ana linux-2.6-tip]$ perf report -i pekka.perf.data 2> /dev/null | head -10
30.04% Xorg b710a561 [.] 0x000000b710a561
14.93% Xorg [kernel] [k] __initramfs_end
5.49% metacity libgobject-2.0.so.0.2000.1 [.] 0x00000000026e46
3.74% evolution libcairo.so.2.10800.6 [.] 0x000000000203bd
3.61% metacity libpthread-2.9.so [.] 0x00000000007a3d
Reported-by: Pekka Enberg <penberg@cs.helsinki.fi>
Tested-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1261148583-20395-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | tools/perf/builtin-report.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/event.h | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index e50a6b10ee6f..5c2ab5357ec6 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -224,7 +224,7 @@ static int __cmd_report(void) perf_session__collapse_resort(session); perf_session__output_resort(session, session->events_stats.total); - fprintf(stdout, "# Samples: %ld\n#\n", session->events_stats.total); + fprintf(stdout, "# Samples: %Ld\n#\n", session->events_stats.total); perf_session__fprintf_hists(session, NULL, false, stdout); if (sort_order == default_sort_order && parent_pattern == default_parent_pattern) diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index 8027309b0422..690a96d0467c 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -95,8 +95,8 @@ typedef union event_union { } event_t; struct events_stats { - unsigned long total; - unsigned long lost; + u64 total; + u64 lost; }; void event__print_totals(void); |