diff options
| -rw-r--r-- | tools/perf/Documentation/perf-annotate.txt | 5 | ||||
| -rw-r--r-- | tools/perf/builtin-annotate.c | 24 |
2 files changed, 29 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt index 33c2521cba4a..18fcc52809fb 100644 --- a/tools/perf/Documentation/perf-annotate.txt +++ b/tools/perf/Documentation/perf-annotate.txt @@ -147,6 +147,11 @@ include::itrace.txt[] The period/hits keywords set the base the percentage is computed on - the samples period or the number of samples (hits). +--percent-limit:: + Do not show functions which have an overhead under that percent on + stdio or stdio2 (Default: 0). Note that this is about selection of + functions to display, not about lines within the function. + SEE ALSO -------- linkperf:perf-record[1], linkperf:perf-report[1] diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c index e65dc380be15..2ffe071dbcff 100644 --- a/tools/perf/builtin-annotate.c +++ b/tools/perf/builtin-annotate.c @@ -54,6 +54,7 @@ struct perf_annotate { bool skip_missing; bool has_br_stack; bool group_set; + float min_percent; const char *sym_hist_filter; const char *cpu_list; DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS); @@ -324,6 +325,17 @@ static void hists__find_annotations(struct hists *hists, (strcmp(he->ms.sym->name, ann->sym_hist_filter) != 0)) goto find_next; + if (ann->min_percent) { + float percent = 0; + u64 total = hists__total_period(hists); + + if (total) + percent = 100.0 * he->stat.period / total; + + if (percent < ann->min_percent) + goto find_next; + } + notes = symbol__annotation(he->ms.sym); if (notes->src == NULL) { find_next: @@ -457,6 +469,16 @@ out: return ret; } +static int parse_percent_limit(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + struct perf_annotate *ann = opt->value; + double pcnt = strtof(str, NULL); + + ann->min_percent = pcnt; + return 0; +} + static const char * const annotate_usage[] = { "perf annotate [<options>]", NULL @@ -557,6 +579,8 @@ int cmd_annotate(int argc, const char **argv) OPT_CALLBACK(0, "percent-type", &annotate.opts, "local-period", "Set percent type local/global-period/hits", annotate_parse_percent_type), + OPT_CALLBACK(0, "percent-limit", &annotate, "percent", + "Don't show entries under that percent", parse_percent_limit), OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts", "Instruction Tracing options\n" ITRACE_HELP, itrace_parse_synth_opts), |