perf annotate: Introduce annotation_line__max_percent()

Out of the annotate_browser__write() routine, to be used in the --stdio2
mode.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-0he0wyy4haswqi1qb35x37do@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/ui/browsers/annotate.c

@@ -117,15 +117,10 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 	int width = browser->width, printed;
 	int i, pcnt_width = annotation__pcnt_width(notes),
 	       cycles_width = annotation__cycles_width(notes);
-	double percent_max = 0.0;
+	double percent_max = annotation_line__max_percent(al, notes);
 	char bf[256];
 	bool show_title = false;
 
-	for (i = 0; i < notes->nr_events; i++) {
-		if (al->samples[i].percent > percent_max)
-			percent_max = al->samples[i].percent;
-	}
-
 	if ((row == 0) && (al->offset == -1 || percent_max == 0.0)) {
 		if (notes->have_cycles) {
 			if (al->ipc == 0.0 && al->cycles == 0)

tools/perf/util/annotate.c

@@ -2184,6 +2184,20 @@ bool ui__has_annotation(void)
 	return use_browser == 1 && perf_hpp_list.sym;
 }
 
+
+double annotation_line__max_percent(struct annotation_line *al, struct annotation *notes)
+{
+	double percent_max = 0.0;
+	int i;
+
+	for (i = 0; i < notes->nr_events; i++) {
+		if (al->samples[i].percent > percent_max)
+			percent_max = al->samples[i].percent;
+	}
+
+	return percent_max;
+}
+
 int symbol__annotate2(struct symbol *sym, struct map *map, struct perf_evsel *evsel,
 		      struct annotation_options *options, struct arch **parch)
 {

tools/perf/util/annotate.h

@@ -124,6 +124,9 @@ bool disasm_line__is_valid_jump(struct disasm_line *dl, struct symbol *sym);
 void disasm_line__free(struct disasm_line *dl);
 struct annotation_line *
 annotation_line__next(struct annotation_line *pos, struct list_head *head);
+
+double annotation_line__max_percent(struct annotation_line *al, struct annotation *notes);
+
 int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw);
 size_t disasm__fprintf(struct list_head *head, FILE *fp);
 void symbol__calc_percent(struct symbol *sym, struct perf_evsel *evsel);