perf stat: Print stalled cycles warning colors

Print the stalled-cycles percentage with different warning level ASCII colors,
as the percentage passes the 25%/50%/75% thresholds.

Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-e25zz44rcms7mu9az4fu5zp0@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 27 insertions, 6 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 845ded8f15a2..e7d91f9cf789 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -46,6 +46,7 @@
 #include "util/evlist.h"
 #include "util/evsel.h"
 #include "util/debug.h"
+#include "util/color.h"
 #include "util/header.h"
 #include "util/cpumap.h"
 #include "util/thread.h"
@@ -426,6 +427,29 @@ static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
                 fprintf(stderr, " # %8.3f CPUs utilized          ", avg / avg_stats(&walltime_nsecs_stats));
 }
 
+static void print_stalled_cycles(int cpu, struct perf_evsel *evsel __used, double avg)
+{
+        double total, ratio = 0.0;
+        const char *color;
+
+        total = avg_stats(&runtime_cycles_stats[cpu]);
+
+        if (total)
+                ratio = avg / total * 100.0;
+
+        color = PERF_COLOR_NORMAL;
+        if (ratio > 75.0)
+                color = PERF_COLOR_RED;
+        else if (ratio > 50.0)
+                color = PERF_COLOR_MAGENTA;
+        else if (ratio > 25.0)
+                color = PERF_COLOR_YELLOW;
+
+        fprintf(stderr, " #   ");
+        color_fprintf(stderr, color, "%5.2f%%", ratio);
+        fprintf(stderr, " of all cycles are idle ");
+}
+
 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
 {
         double total, ratio = 0.0;
@@ -488,12 +512,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
                 fprintf(stderr, " # %8.3f %% of all cache refs    ", ratio);
 
         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES)) {
-                total = avg_stats(&runtime_cycles_stats[cpu]);
-
-                if (total)
-                        ratio = avg / total * 100.0;
-
-                fprintf(stderr, " #   %5.2f%% of all cycles are idle ", ratio);
+                print_stalled_cycles(cpu, evsel, avg);
         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
                 total = avg_stats(&runtime_nsecs_stats[cpu]);
 
@@ -508,6 +527,8 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
                         ratio = 1000.0 * avg / total;
 
                 fprintf(stderr, " # %8.3f M/sec                  ", ratio);
+        } else {
+                fprintf(stderr, "                                   ");
         }
 }