From a0b404f4c0820a934ae1b6ce39d8a4a0f01a7a20 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Sun, 19 Apr 2015 13:04:10 +0900
Subject: perf diff: Make hist_entry_diff fields union
The period_ratio_delta, period_ratio and wdiff are never by used at the
same time. Instead, Just one of them is accessed according to a
comparison method. So make it union to reduce memory footprint.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1429416255-12070-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/sort.h | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
(limited to 'tools/perf/util/sort.h')
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index af192f172fa2..de3303fe726d 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -58,15 +58,16 @@ struct he_stat {
struct hist_entry_diff {
bool computed;
+ union {
+ /* PERF_HPP__DELTA */
+ double period_ratio_delta;
- /* PERF_HPP__DELTA */
- double period_ratio_delta;
-
- /* PERF_HPP__RATIO */
- double period_ratio;
+ /* PERF_HPP__RATIO */
+ double period_ratio;
- /* HISTC_WEIGHTED_DIFF */
- s64 wdiff;
+ /* HISTC_WEIGHTED_DIFF */
+ s64 wdiff;
+ };
};
/**
--
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