[PATCH 1/2] perf stat: Adjust print unit

From: Namhyung Kim
Date: Mon Feb 06 2012 - 02:30:24 EST


The default 'M/sec' unit is not useful if the result is small enough.
Adjust it dynamically according to the value.

Signed-off-by: Namhyung Kim <namhyung.kim@xxxxxxx>
---
tools/perf/builtin-stat.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 459b8620a5d9..32d930eb754e 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -844,12 +844,18 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)

fprintf(output, " # %8.3f GHz ", ratio);
} else if (runtime_nsecs_stats[cpu].n != 0) {
+ char unit = 'M';
+
total = avg_stats(&runtime_nsecs_stats[cpu]);

if (total)
ratio = 1000.0 * avg / total;
+ if (ratio < 0.001) {
+ ratio *= 1000;
+ unit = 'K';
+ }

- fprintf(output, " # %8.3f M/sec ", ratio);
+ fprintf(output, " # %8.3f %c/sec ", ratio, unit);
} else {
fprintf(output, " ");
}
--
1.7.9

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