Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH 2/7] perf diff: Make hist_entry_diff fields union | Date | Sun, 19 Apr 2015 13:04:10 +0900 |
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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> --- tools/perf/util/sort.h | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)
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; + }; }; /** -- 2.3.5
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