linux-kernel - [tip:perf/core] perf lock: Limit bad rate precision

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Message-ID: <tip-60a25cbc4a167fc0129296c3c640d8506a57acc5@git.kernel.org>
Date:	Mon, 14 Oct 2013 22:24:38 -0700
From:	tip-bot for Davidlohr Bueso <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, hpa@...or.com,
	mingo@...nel.org, peterz@...radead.org,
	mitake@....info.waseda.ac.jp, fweisbec@...il.com,
	tglx@...utronix.de, davidlohr@...com, aswin@...com
Subject: [tip:perf/core] perf lock: Limit bad rate precision

Commit-ID:  60a25cbc4a167fc0129296c3c640d8506a57acc5
Gitweb:     http://git.kernel.org/tip/60a25cbc4a167fc0129296c3c640d8506a57acc5
Author:     Davidlohr Bueso <davidlohr@...com>
AuthorDate: Sun, 8 Sep 2013 19:19:18 -0700
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 9 Oct 2013 11:23:54 -0300

perf lock: Limit bad rate precision

Two decimal precision should be enough for this.

Signed-off-by: Davidlohr Bueso <davidlohr@...com>
Cc: Aswin Chandramouleeswaran <aswin@...com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/1378693159-8747-7-git-send-email-davidlohr@hp.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-lock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 780484f..972310c 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -686,7 +686,7 @@ static void print_bad_events(int bad, int total)
 
 	pr_info("\n=== output for debug===\n\n");
 	pr_info("bad: %d, total: %d\n", bad, total);
-	pr_info("bad rate: %f %%\n", (double)bad / (double)total * 100);
+	pr_info("bad rate: %.2f %%\n", (double)bad / (double)total * 100);
 	pr_info("histogram of events caused bad sequence\n");
 	for (i = 0; i < BROKEN_MAX; i++)
 		pr_info(" %10s: %d\n", name[i], bad_hist[i]);
--
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