linux-kernel - [tip:perfcounters/urgent] perf stat: Use percentages for scaling output

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Message-ID: <tip-210ad39fb7ef0bc0494483f517f42524f16bb2a7@git.kernel.org>
Date:	Mon, 29 Jun 2009 19:54:52 GMT
From:	tip-bot for Ingo Molnar <mingo@...e.hu>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, acme@...hat.com, paulus@...ba.org,
	hpa@...or.com, mingo@...hat.com, a.p.zijlstra@...llo.nl,
	efault@....de, jaswinder@...nel.org, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:perfcounters/urgent] perf stat: Use percentages for scaling output

Commit-ID:  210ad39fb7ef0bc0494483f517f42524f16bb2a7
Gitweb:     http://git.kernel.org/tip/210ad39fb7ef0bc0494483f517f42524f16bb2a7
Author:     Ingo Molnar <mingo@...e.hu>
AuthorDate: Mon, 29 Jun 2009 21:50:54 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 29 Jun 2009 21:50:54 +0200

perf stat: Use percentages for scaling output

Peter expressed a strong preference for percentage based
display of scaled values - so revert to that from the
recently introduced multiplication-factor unit.

Reported-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Jaswinder Singh Rajput <jaswinder@...nel.org>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 tools/perf/builtin-stat.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 3e5ea4e..c5a2907 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -307,7 +307,8 @@ static void print_counter(int counter)
 		abs_printout(counter, count, noise);
 
 	if (scaled)
-		fprintf(stderr, "  (%7.2fx scaled)", (double)count[1]/count[2]);
+		fprintf(stderr, "  (scaled from %.2f%%)",
+			(double) count[2] / count[1] * 100);
 
 	fprintf(stderr, "\n");
 }
--
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