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authorArnaldo Carvalho de Melo <acme@redhat.com>2009-12-18 13:03:03 -0200
committerIngo Molnar <mingo@elte.hu>2009-12-18 16:22:52 +0100
commitb5b60fda1e462a849bc37dfbace2888191be82cc (patch)
tree6b4d1e2811bfa9d003fca6b7a6d11b73ec792919
parent99e8c5a3b875a34d894a711c9a3669858d6adf45 (diff)
downloadop-kernel-dev-b5b60fda1e462a849bc37dfbace2888191be82cc.zip
op-kernel-dev-b5b60fda1e462a849bc37dfbace2888191be82cc.tar.gz
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.c2
-rw-r--r--tools/perf/util/event.h4
2 files changed, 3 insertions, 3 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index e50a6b1..5c2ab53 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 8027309..690a96d 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);
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