[PATCH 6/6] perf, sort: Allow unique sorting instead of combining hist_entries

[Don Zickus <dzickus@redhat.com>]

The cache contention tools needs to keep all the perf records unique in order
to properly parse all the data.  Currently add_hist_entry() will combine
the duplicate record and add the weight/period to the existing record.

This throws away the unique data the cache contention tool needs (mainly
the data source).  Create a flag to force the records to stay unique.

Signed-off-by: Don Zickus <dzickus@redhat.com>
---
 tools/perf/util/hist.c | 3 ++-
 tools/perf/util/sort.c | 1 +
 tools/perf/util/sort.h | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 81f47ee..69d2cb9 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -378,7 +378,8 @@ static struct hist_entry *add_hist_entry(struct hists *hists,
 		 */
 		cmp = hist_entry__cmp(he, entry);
 
-		if (!cmp) {
+		if (!cmp && !sort__wants_unique) {
+
 			he_stat__add_period(&he->stat, period, weight);
 
 			/*
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index be675f4..ca86b23 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -15,6 +15,7 @@ int		sort__need_collapse = 0;
 int		sort__has_parent = 0;
 int		sort__has_sym = 0;
 int		sort__has_dso = 0;
+int		sort__wants_unique = 0;
 enum sort_mode	sort__mode = SORT_MODE__NORMAL;
 
 enum sort_type	sort__first_dimension;
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index b1f52a8..b005445 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -33,6 +33,7 @@ extern int have_ignore_callees;
 extern int sort__need_collapse;
 extern int sort__has_parent;
 extern int sort__has_sym;
+extern int sort__wants_unique;
 extern enum sort_mode sort__mode;
 extern struct sort_entry sort_comm;
 extern struct sort_entry sort_dso;
-- 
1.7.11.7