diff --git a/tools/perf/util/bpf_lock_contention.c b/tools/perf/util/bpf_lock_contention.c
index eb8e29b8064b..b1cfa63a488f 100644
--- a/tools/perf/util/bpf_lock_contention.c
+++ b/tools/perf/util/bpf_lock_contention.c
@@ -470,8 +470,8 @@ static void update_lock_stat(int map_fd, int pid, u64 end_ts,
 		stat_key.lock_addr_or_cgroup = ts_data->lock;
 		break;
 	case LOCK_AGGR_CGROUP:
-		/* TODO */
-		return;
+		stat_key.lock_addr_or_cgroup = ts_data->cgroup_id;
+		break;
 	default:
 		return;
 	}
diff --git a/tools/perf/util/bpf_skel/lock_contention.bpf.c b/tools/perf/util/bpf_skel/lock_contention.bpf.c
index d4186ae9f85c..0d9c6f55050e 100644
--- a/tools/perf/util/bpf_skel/lock_contention.bpf.c
+++ b/tools/perf/util/bpf_skel/lock_contention.bpf.c
@@ -597,6 +597,8 @@ int contention_begin(u64 *ctx)
 	pelem->timestamp = bpf_ktime_get_ns();
 	pelem->lock = (__u64)ctx[0];
 	pelem->flags = (__u32)ctx[1];
+	if (aggr_mode == LOCK_AGGR_CGROUP)
+		pelem->cgroup_id = get_current_cgroup_id();
 
 	if (needs_callstack) {
 		u32 i = 0;
@@ -832,7 +834,7 @@ int contention_end(u64 *ctx)
 			key.stack_id = pelem->stack_id;
 		break;
 	case LOCK_AGGR_CGROUP:
-		key.lock_addr_or_cgroup = get_current_cgroup_id();
+		key.lock_addr_or_cgroup = pelem->cgroup_id;
 		break;
 	default:
 		/* should not happen */
diff --git a/tools/perf/util/bpf_skel/lock_data.h b/tools/perf/util/bpf_skel/lock_data.h
index 28c5e5aced7f..652e114e6b87 100644
--- a/tools/perf/util/bpf_skel/lock_data.h
+++ b/tools/perf/util/bpf_skel/lock_data.h
@@ -13,6 +13,7 @@ struct owner_tracing_data {
 struct tstamp_data {
 	u64 timestamp;
 	u64 lock;
+	u64 cgroup_id;
 	u32 flags;
 	s32 stack_id;
 };