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    Subject[PATCH 09/16] perf stat: Suppress printing std-dev when its 0
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    From: Jim Cromie <jim.cromie@gmail.com>

    For pretty output only (preserve column for cvs output), dont print
    std-deviation when its 0.00. Do this based upon value, instead of
    checking for --no-aggr, since the stats could conceivably be computed
    over the runs on each CPU, and theres no reason to preclude that.

    Link: http://lkml.kernel.org/r/1315437244-3788-4-git-send-email-jim.cromie@gmail.com
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---
    tools/perf/builtin-stat.c | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
    index af0d65b..076eda5 100644
    --- a/tools/perf/builtin-stat.c
    +++ b/tools/perf/builtin-stat.c
    @@ -528,7 +528,7 @@ static void print_noise_pct(double total, double avg)

    if (csv_output)
    fprintf(output, "%s%.2f%%", csv_sep, pct);
    - else
    + else if (pct)
    fprintf(output, " ( +-%6.2f%% )", pct);
    }

    --
    1.6.2.5


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