linux-kernel - [PATCH 2/9] perf stat: Increase metric length to align outputs

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Date:   Mon,  7 Nov 2022 13:33:07 -0800
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org,
        Kan Liang <kan.liang@...ux.intel.com>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        James Clark <james.clark@....com>
Subject: [PATCH 2/9] perf stat: Increase metric length to align outputs

When perf stat is called with very detailed events, the output doesn't
align well like below:

  $ sudo perf stat -a -ddd sleep 1

   Performance counter stats for 'system wide':

          8,020.23 msec cpu-clock                        #    7.997 CPUs utilized
             3,970      context-switches                 #  494.998 /sec
               169      cpu-migrations                   #   21.072 /sec
               586      page-faults                      #   73.065 /sec
       649,568,060      cycles                           #    0.081 GHz                      (30.42%)
       304,044,345      instructions                     #    0.47  insn per cycle           (38.40%)
        60,313,022      branches                         #    7.520 M/sec                    (38.89%)
         2,766,919      branch-misses                    #    4.59% of all branches          (39.26%)
        74,422,951      L1-dcache-loads                  #    9.279 M/sec                    (39.39%)
         8,025,568      L1-dcache-load-misses            #   10.78% of all L1-dcache accesses  (39.22%)
         3,314,995      LLC-loads                        #  413.329 K/sec                    (30.83%)
         1,225,619      LLC-load-misses                  #   36.97% of all LL-cache accesses  (30.45%)
   <not supported>      L1-icache-loads
        20,420,493      L1-icache-load-misses            #    0.00% of all L1-icache accesses  (30.29%)
        58,017,947      dTLB-loads                       #    7.234 M/sec                    (30.37%)
           704,677      dTLB-load-misses                 #    1.21% of all dTLB cache accesses  (30.27%)
           234,225      iTLB-loads                       #   29.204 K/sec                    (30.29%)
           417,166      iTLB-load-misses                 #  178.10% of all iTLB cache accesses  (30.32%)
   <not supported>      L1-dcache-prefetches
   <not supported>      L1-dcache-prefetch-misses

       1.002947355 seconds time elapsed

Increase the METRIC_LEN by 3 so that it can align properly.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/stat-display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index ea41e6308c50..17d656566cd9 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -218,7 +218,7 @@ struct outstate {
 	struct evsel *evsel;
 };
 
-#define METRIC_LEN  35
+#define METRIC_LEN  38
 
 static void new_line_std(struct perf_stat_config *config __maybe_unused,
 			 void *ctx)
-- 
2.38.1.431.g37b22c650d-goog