Commit-ID: c78df6c1d49b5d798f1579141e3a12be7c325d1e
Gitweb: http://git.kernel.org/tip/c78df6c1d49b5d798f1579141e3a12be7c325d1e
Author: Ingo Molnar <mingo@xxxxxxx>
AuthorDate: Wed, 27 Apr 2011 12:16:10 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Tue, 26 Apr 2011 20:04:58 +0200
perf stat: Print branch misses warning colors
Print the missed-branches percentage with different warning level ASCII colors,
as the percentage passes the 5%/10%/20% thresholds.
These thresholds are set to relatively low levels, because on most CPUs even a
moderate percentage of branch-misses already shows up as a slowdown.
Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Acked-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-ybqukg7p86leiup7gl03ecgk@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
tools/perf/builtin-stat.c | 31 ++++++++++++++++++++++++-------
1 files changed, 24 insertions(+), 7 deletions(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index e7d91f9..5d4e1b9 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -450,6 +450,29 @@ static void print_stalled_cycles(int cpu, struct perf_evsel *evsel __used, doubl
fprintf(stderr, " of all cycles are idle ");
}
+static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+{
+ double total, ratio = 0.0;
+ const char *color;
+
+ total = avg_stats(&runtime_branches_stats[cpu]);
+
+ if (total)
+ ratio = avg / total * 100.0;
+
+ color = PERF_COLOR_NORMAL;
+ if (ratio > 20.0)
+ color = PERF_COLOR_RED;
+ else if (ratio > 10.0)
+ color = PERF_COLOR_MAGENTA;
+ else if (ratio > 5.0)
+ color = PERF_COLOR_YELLOW;
+
+ fprintf(stderr, " # ");
+ color_fprintf(stderr, color, "%5.2f%%", ratio);
+ fprintf(stderr, " of all branches ");
+}
+
static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
{
double total, ratio = 0.0;
@@ -495,13 +518,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
} else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
runtime_branches_stats[cpu].n != 0) {
- total = avg_stats(&runtime_branches_stats[cpu]);
-
- if (total)
- ratio = avg * 100 / total;
-
- fprintf(stderr, " # %5.2f %% of all branches ", ratio);
-
+ print_branch_misses(cpu, evsel, avg);
} else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
runtime_cacherefs_stats[cpu].n != 0) {
total = avg_stats(&runtime_cacherefs_stats[cpu]);
--
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