[tip:perf/urgent] perf annotate: Loop group events directly in annotation__calc_percent()

[tip-bot for Jiri Olsa]

Commit-ID:  2bcf73069b0722c92a84c0fd57df542890a74904
Gitweb:     https://git.kernel.org/tip/2bcf73069b0722c92a84c0fd57df542890a74904
Author:     Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Sat, 4 Aug 2018 15:05:08 +0200
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 8 Aug 2018 15:55:47 -0300

perf annotate: Loop group events directly in annotation__calc_percent()

We need to bring in 'struct hists' object and for that we need 'struct
perf_evsel' object in the scope.

Switching the group data loop with the evsel group loop.  It does the
same thing, but it brings evsel object, that we can use later get the
'struct hists' object.

Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20180804130521.11408-8-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/annotate.c | 13 ++++++++-----
 tools/perf/util/evsel.h    |  7 +++++++
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 728603636adc..34d4bb73aa84 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1774,13 +1774,14 @@ static void calc_percent(struct sym_hist *sym_hist,
 }
 
 static void annotation__calc_percent(struct annotation *notes,
-				     struct perf_evsel *evsel, s64 len)
+				     struct perf_evsel *leader, s64 len)
 {
 	struct annotation_line *al, *next;
+	struct perf_evsel *evsel;
 
 	list_for_each_entry(al, &notes->src->source, node) {
 		s64 end;
-		int i;
+		int i = 0;
 
 		if (al->offset == -1)
 			continue;
@@ -1788,12 +1789,14 @@ static void annotation__calc_percent(struct annotation *notes,
 		next = annotation_line__next(al, &notes->src->source);
 		end  = next ? next->offset : len;
 
-		for (i = 0; i < al->data_nr; i++) {
+		for_each_group_evsel(evsel, leader) {
 			struct annotation_data *data;
 			struct sym_hist *sym_hist;
 
-			sym_hist = annotation__histogram(notes, evsel->idx + i);
-			data = &al->data[i];
+			BUG_ON(i >= al->data_nr);
+
+			sym_hist = annotation__histogram(notes, evsel->idx);
+			data = &al->data[i++];
 
 			calc_percent(sym_hist, data, al->offset, end);
 		}
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 973c03167947..163c960614d3 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -452,11 +452,18 @@ static inline int perf_evsel__group_idx(struct perf_evsel *evsel)
 	return evsel->idx - evsel->leader->idx;
 }
 
+/* Iterates group WITHOUT the leader. */
 #define for_each_group_member(_evsel, _leader) 					\
 for ((_evsel) = list_entry((_leader)->node.next, struct perf_evsel, node); 	\
      (_evsel) && (_evsel)->leader == (_leader);					\
      (_evsel) = list_entry((_evsel)->node.next, struct perf_evsel, node))
 
+/* Iterates group WITH the leader. */
+#define for_each_group_evsel(_evsel, _leader) 					\
+for ((_evsel) = _leader; 							\
+     (_evsel) && (_evsel)->leader == (_leader);					\
+     (_evsel) = list_entry((_evsel)->node.next, struct perf_evsel, node))
+
 static inline bool perf_evsel__has_branch_callstack(const struct perf_evsel *evsel)
 {
 	return evsel->attr.branch_sample_type & PERF_SAMPLE_BRANCH_CALL_STACK;