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>

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 845ded8f15a26bd05bb919df98cf6bc2f5ab896d..e7d91f9cf7890ace42ab7892683f159c6d9c3269 100644 (file)
--- 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, "                                   ");
        }
 }