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authorNamhyung Kim <namhyung@kernel.org>2022-05-02 16:20:15 -0700
committerArnaldo Carvalho de Melo <acme@redhat.com>2022-05-10 14:37:55 -0300
commitcad10ce36671c99dde850de7bd4ca0d8df66c47f (patch)
tree74b1089acdbf4e4df98903987a4f538c821ac78e /tools/perf/builtin-annotate.c
parent7df319e5b3b60f159bebf2949f7e28823fff2086 (diff)
perf annotate: Add --percent-limit option
Like in 'perf report' and 'perf top', Add this option to limit the number of functions it displays based on the overhead value in percent. This affects only stdio and stdio2 output modes. Without this, it shows very long disassembly lines for every function in the data file. If users don't want this behavior, they can set a value in percent to suppress that. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20220502232015.697243-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-annotate.c')
-rw-r--r--tools/perf/builtin-annotate.c24
1 files changed, 24 insertions, 0 deletions
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),