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| author | Ingo Molnar <mingo@elte.hu> | 2011-04-27 12:16:10 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-04-26 20:04:58 +0200 |
| commit | c78df6c1d49b5d798f1579141e3a12be7c325d1e (patch) | |
| tree | 355d14ae8b178d93a95012c13a930ea41384dd1d /tools | |
| parent | a5d243d04a150acbfa79d641154f49e5d920f64f (diff) | |
| download | kernel-common-c78df6c1d49b5d798f1579141e3a12be7c325d1e.tar.gz kernel-common-c78df6c1d49b5d798f1579141e3a12be7c325d1e.tar.bz2 kernel-common-c78df6c1d49b5d798f1579141e3a12be7c325d1e.zip | |
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@chello.nl>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-ybqukg7p86leiup7gl03ecgk@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
| -rw-r--r-- | 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 e7d91f9cf789..5d4e1b9b2d89 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]); |