Commit a0b404f4 authored Apr 19, 2015 by Namhyung Kim Committed by Arnaldo Carvalho de Melo Apr 29, 2015

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>

parent cc5e461a

tools/perf/util/sort.h

+8 −7

Original line number	Diff line number	Diff line
		@@ -58,7 +58,7 @@ struct he_stat {

		struct hist_entry_diff {
		bool computed;

		union {
		/* PERF_HPP__DELTA */
		double period_ratio_delta;

		@@ -68,6 +68,7 @@ struct hist_entry_diff {
		/* HISTC_WEIGHTED_DIFF */
		s64 wdiff;
		};
		};

		/**
		* struct hist_entry - histogram entry