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perf stat: Increase perf metric output resolution

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Add another digit of precision to the perf metrics output.

Before:

  $ /usr/bin/perf stat --metrics run_cpi /bin/ls
  [...]
           4,345,526      pm_run_cyc                #      1.1 run_cpi
           3,818,069      pm_run_inst_cmpl
  [...]
  $ /usr/bin/perf stat --metrics run_cpi --metric-only /bin/ls
  [...]
               run_cpi
                   1.1
  [...]

After:

  $ perf stat --metrics run_cpi /bin/ls
  [...]
           4,280,882      pm_run_cyc                #     1.12 run_cpi
           3,817,016      pm_run_inst_cmpl
  [...]
  $ perf stat --metrics run_cpi --metric-only /bin/ls
  [...]
               run_cpi
                  1.06
  [...]

Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Paul Clarke <pc@us.ibm.com>
LPU-Reference: 1588861087-31280-1-git-send-email-pc@us.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Paul A. Clarke
2020-05-07 09:18:07 -05:00
committed by Arnaldo Carvalho de Melo
parent 9be27a5d41
commit d4d5ca0baa
1 changed files with 1 additions and 1 deletions
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2
tools/perf/util/stat-shadow.c
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@@ -797,7 +797,7 @@ static void generic_metric(struct perf_stat_config *config,
print_metric(config, ctxp, NULL, "%8.1f", print_metric(config, ctxp, NULL, "%8.1f",
metric_bf, ratio); metric_bf, ratio);
} else { } else {
print_metric(config, ctxp, NULL, "%8.1f", print_metric(config, ctxp, NULL, "%8.2f",
metric_name ? metric_name ?
metric_name : metric_name :
out->force_header ? name : "", out->force_header ? name : "",