perf stat: Allow to specify specific metric column len

The following change will introduce new metrics, that doesn't need such
wide hard coded spacing. Switch METRIC_ONLY_LEN macro usage with
metric_only_len variable.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20180606221513.11302-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 8f3fdc052728..3fc1f5286d50 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -145,6 +145,8 @@ static struct target target = {
 
 typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
 
+#define METRIC_ONLY_LEN 20
+
 static int                      run_count                       =  1;
 static bool                     no_inherit                      = false;
 static volatile pid_t           child_pid                       = -1;
@@ -182,6 +184,7 @@ static int			print_mixed_hw_group_error;
 static u64                      *walltime_run;
 static bool                     ru_display                      = false;
 static struct rusage            ru_data;
+static unsigned int             metric_only_len                 = METRIC_ONLY_LEN;
 
 struct perf_stat {
         bool                     record;
@@ -969,8 +972,6 @@ static void print_metric_csv(void *ctx,
         fprintf(out, "%s%s%s%s", csv_sep, vals, csv_sep, unit);
 }
 
-#define METRIC_ONLY_LEN 20
-
 /* Filter out some columns that don't work well in metrics only mode */
 
 static bool valid_only_metric(const char *unit)
@@ -1002,7 +1003,7 @@ static void print_metric_only(void *ctx, const char *color, const char *fmt,
         struct outstate *os = ctx;
         FILE *out = os->fh;
         char buf[1024], str[1024];
-        unsigned mlen = METRIC_ONLY_LEN;
+        unsigned mlen = metric_only_len;
 
         if (!valid_only_metric(unit))
                 return;
@@ -1054,7 +1055,7 @@ static void print_metric_header(void *ctx, const char *color __maybe_unused,
         if (csv_output)
                 fprintf(os->fh, "%s%s", unit, csv_sep);
         else
-                fprintf(os->fh, "%*s ", METRIC_ONLY_LEN, unit);
+                fprintf(os->fh, "%*s ", metric_only_len, unit);
 }
 
 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)