Commit a0b404f4 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo

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: default avatarNamhyung 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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent cc5e461a
......@@ -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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