linux-kernel - [PATCH] perf report: fix broken perf report -n on 32-bit systems

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Date:	Mon, 22 Oct 2012 23:00:25 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	linux-kernel@...r.kernel.org
Cc:	acme@...hat.com, jolsa@...hat.com, peterz@...radead.org,
	mingo@...e.hu, dsahern@...il.com, namhyung@...il.com
Subject: [PATCH] perf report: fix broken perf report -n on 32-bit systems


On 32-bit systems, using perf report -n would yield garbage
for the Samples column. This is because the hpp code was
assuming the hist_entry.stat.nr_events was u64 when in
reality it was u32.

This patch fixes the problem by defining nr_events
to be u64. u32 is too small anyway.

Signed-off-by: Stephane Eranian <eranian@...gle.com>
---

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index ef2f93c..616757e 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -992,7 +992,7 @@ static int hist_browser__fprintf_entry(struct hist_browser *browser,
 	printed += fprintf(fp, " %5.2f%%", percent);
 
 	if (symbol_conf.show_nr_samples)
-		printed += fprintf(fp, " %11u", he->stat.nr_events);
+		printed += fprintf(fp, " %11"PRIu64, he->stat.nr_events);
 
 	if (symbol_conf.show_total_period)
 		printed += fprintf(fp, " %12" PRIu64, he->stat.period);
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 13761d8..ecda054 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -49,7 +49,7 @@ struct he_stat {
 	u64			period_us;
 	u64			period_guest_sys;
 	u64			period_guest_us;
-	u32			nr_events;
+	u64			nr_events;
 };
 
 struct hist_entry_diff {
--
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