perf report: Add processing for cycle histograms

[deliverable/linux.git] / tools / perf / util / hist.c

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 54fc0033dd6af5fdfffac2b43e52cbd62e1892f8..a6e9ddd37913088c7a427d8c97a55c59e5de3813 100644 (file)
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1415,6 +1415,39 @@ int hists__link(struct hists *leader, struct hists *other)
        return 0;
 }
 
+void hist__account_cycles(struct branch_stack *bs, struct addr_location *al,
+                         struct perf_sample *sample, bool nonany_branch_mode)
+{
+       struct branch_info *bi;
+
+       /* If we have branch cycles always annotate them. */
+       if (bs && bs->nr && bs->entries[0].flags.cycles) {
+               int i;
+
+               bi = sample__resolve_bstack(sample, al);
+               if (bi) {
+                       struct addr_map_symbol *prev = NULL;
+
+                       /*
+                        * Ignore errors, still want to process the
+                        * other entries.
+                        *
+                        * For non standard branch modes always
+                        * force no IPC (prev == NULL)
+                        *
+                        * Note that perf stores branches reversed from
+                        * program order!
+                        */
+                       for (i = bs->nr - 1; i >= 0; i--) {
+                               addr_map_symbol__account_cycles(&bi[i].from,
+                                       nonany_branch_mode ? NULL : prev,
+                                       bi[i].flags.cycles);
+                               prev = &bi[i].to;
+                       }
+                       free(bi);
+               }
+       }
+}
 
 size_t perf_evlist__fprintf_nr_events(struct perf_evlist *evlist, FILE *fp)
 {