From b5b60fda1e462a849bc37dfbace2888191be82cc Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Fri, 18 Dec 2009 13:03:03 -0200 Subject: [PATCH] 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 Tested-by: Pekka Enberg Signed-off-by: Arnaldo Carvalho de Melo Cc: Frederic Weisbecker Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras LKML-Reference: <1261148583-20395-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar --- tools/perf/builtin-report.c | 2 +- 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 e50a6b10ee6..5c2ab5357ec 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 8027309b042..690a96d0467 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);