[PATCH] perf/annotate: Add number of samples to the header

[Peter Zijlstra]

Staring at annotations of large functions is useless if there's only a
few samples in them. Report the number of samples in the header to make
this easier to determine.

Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
---
 tools/perf/util/annotate.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 7e5a1e8..7aba36f 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1512,13 +1512,14 @@ int symbol__annotate_printf(struct symbol *sym, struct 
map *map,
        const char *d_filename;
        const char *evsel_name = perf_evsel__name(evsel);
        struct annotation *notes = symbol__annotation(sym);
+       struct sym_hist *h = annotation__histogram(notes, evsel->idx);
        struct disasm_line *pos, *queue = NULL;
        u64 start = map__rip_2objdump(map, sym->start);
        int printed = 2, queue_len = 0;
        int more = 0;
        u64 len;
        int width = 8;
-       int namelen, evsel_name_len, graph_dotted_len;
+       int graph_dotted_len;
 
        filename = strdup(dso->long_name);
        if (!filename)
@@ -1530,17 +1531,14 @@ int symbol__annotate_printf(struct symbol *sym, struct 
map *map,
                d_filename = basename(filename);
 
        len = symbol__size(sym);
-       namelen = strlen(d_filename);
-       evsel_name_len = strlen(evsel_name);
 
        if (perf_evsel__is_group_event(evsel))
                width *= evsel->nr_members;
 
-       printf(" %-*.*s|        Source code & Disassembly of %s for %s\n",
-              width, width, "Percent", d_filename, evsel_name);
+       graph_dotted_len = printf(" %-*.*s|     Source code & Disassembly of %s 
for %s (%" PRIu64 " samples)\n",
+              width, width, "Percent", d_filename, evsel_name, h->sum);
 
-       graph_dotted_len = width + namelen + evsel_name_len;
-       printf("-%-*.*s-----------------------------------------\n",
+       printf("%-*.*s-----\n",
               graph_dotted_len, graph_dotted_len, graph_dotted_line);
 
        if (verbose)