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| author | Jiri Olsa <jolsa@kernel.org> | 2018-04-23 11:08:22 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-04-26 09:30:27 -0300 |
| commit | abc60bad0030193ffb55e438664bc09ac53939cf (patch) | |
| tree | 820d5dfb5fd8d80a1ce3c682256500085e3ebe45 | |
| parent | e55c14af488a728d314777f038bd05db18afc1e9 (diff) | |
| download | linux-abc60bad0030193ffb55e438664bc09ac53939cf.tar.gz linux-abc60bad0030193ffb55e438664bc09ac53939cf.tar.bz2 linux-abc60bad0030193ffb55e438664bc09ac53939cf.zip | |
perf stat: Display length strings of each run for --table option
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 <mingo@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180423090823.32309-9-jolsa@kernel.org
[ Updated 'perf stat --table' man page entry ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/Documentation/perf-stat.txt | 12 | ||||
| -rw-r--r-- | tools/perf/builtin-stat.c | 8 |
2 files changed, 13 insertions, 7 deletions
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt index 72a2414513bd..3a822f308e6d 100644 --- a/tools/perf/Documentation/perf-stat.txt +++ b/tools/perf/Documentation/perf-stat.txt @@ -123,14 +123,14 @@ spreadsheets. Columns are separated by the string specified in SEP. Performance counter stats for 'perf bench sched pipe' (5 runs): # Table of individual measurements: - 5.379 (-0.176) - 5.243 (-0.311) - 5.238 (-0.317) - 5.536 (-0.019) - 6.377 (+0.823) + 5.189 (-0.293) # + 5.189 (-0.294) # + 5.186 (-0.296) # + 5.663 (+0.181) ## + 6.186 (+0.703) #### # Final result: - 5.555 +- 0.213 seconds time elapsed ( +- 3.83% ) + 5.483 +- 0.198 seconds time elapsed ( +- 3.62% ) -G name:: --cgroup name:: diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 72553937c010..a4f662a462c6 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -1790,9 +1790,15 @@ 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, ""); |