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| author |   Namhyung Kim <namhyung@kernel.org> | 2015-04-19 13:04:10 +0900 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-04-29 10:37:44 -0300 |
| commit | a0b404f4c0820a934ae1b6ce39d8a4a0f01a7a20 (patch) | |
| tree | eda3323e26c228881ec6d18f412d03ee10633a91 /tools/perf/util/sort.h | |
| parent | perf hists: Get rid of position field from struct hist_entry (diff) | |
| download | linux-dev-a0b404f4c0820a934ae1b6ce39d8a4a0f01a7a20.tar.xz linux-dev-a0b404f4c0820a934ae1b6ce39d8a4a0f01a7a20.zip | |
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>
Diffstat (limited to 'tools/perf/util/sort.h')
| -rw-r--r-- | tools/perf/util/sort.h | 15 |
1 files 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; + }; }; /** |