[PATCH v4 22/48] perf cpumap: Trim the cpu_aggr_map

[Ian Rogers]

cpu_aggr_map__new removes duplicates, when this happens shrink the
array.

Reviewed-by: James Clark <james.clark@xxxxxxx>
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/perf/util/cpumap.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index f1d76a8e92e8..2779474f39db 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -185,7 +185,15 @@ struct cpu_aggr_map *cpu_aggr_map__new(const struct perf_cpu_map *cpus,
 			c->nr++;
 		}
 	}
-
+	/* Trim. */
+	if (c->nr != cpus->nr) {
+		struct cpu_aggr_map *trimmed_c =
+			realloc(c,
+				sizeof(struct cpu_aggr_map) + sizeof(struct aggr_cpu_id) * c->nr);
+
+		if (trimmed_c)
+			c = trimmed_c;
+	}
 	/* ensure we process id in increasing order */
 	qsort(c->map, c->nr, sizeof(struct aggr_cpu_id), aggr_cpu_id__cmp);
 
-- 
2.34.1.448.ga2b2bfdf31-goog