Adding support to display visual aid 'length strings' to
easily spot the biggest difference in time table.
$ perf stat -r 10 --table perf bench sched pipe
...
Performance counter stats for './perf bench sched pipe' (5 runs):
# Table of individual measurements:
5.189 (-0.293) #
5.189 (-0.294) #
5.186 (-0.296) #
5.663 (+0.181) ##
6.186 (+0.703) ####
# Final result:
5.483 +- 0.198 seconds time elapsed ( +- 3.62% )
Suggested-by: Ingo Molnar <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Jiri Olsa <[email protected]>
---
tools/perf/builtin-stat.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 345687b0eb10..2137c7d11767 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1759,9 +1759,15 @@ static void print_table(FILE *output, int precision,
double avg)
for (idx = 0; idx < run_count; idx++) {
double run = (double) walltime_run[idx] / NSEC_PER_SEC;
+ int h, n = 1 + abs((int) (100.0 * (run - avg)/run) / 5);
- fprintf(output, " %17.*f (%+.*f)\n",
+ fprintf(output, " %17.*f (%+.*f) ",
precision, run, precision, run - avg);
+
+ for (h = 0; h < n; h++)
+ fprintf(output, "#");
+
+ fprintf(output, "\n");
}
fprintf(output, "\n%*s# Final result:\n", indent, "");
--
2.13.6
