1 files changed, 42 insertions, 0 deletions
diff --git a/intern/cycles/integrator/work_balancer.h b/intern/cycles/integrator/work_balancer.h
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+++ b/intern/cycles/integrator/work_balancer.h
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+/*
+ * Copyright 2011-2021 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "util/util_vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+struct WorkBalanceInfo {
+  /* Time spent performing corresponding work. */
+  double time_spent = 0;
+
+  /* Average occupancy of the device while performing the work. */
+  float occupancy = 1.0f;
+
+  /* Normalized weight, which is ready to be used for work balancing (like calculating fraction of
+   * the big tile which is to be rendered on the device). */
+  double weight = 1.0;
+};
+
+/* Balance work for an initial render interation, before any statistics is known. */
+void work_balance_do_initial(vector<WorkBalanceInfo> &work_balance_infos);
+
+/* Rebalance work after statistics has been accumulated.
+ * Returns true if the balancing did change. */
+bool work_balance_do_rebalance(vector<WorkBalanceInfo> &work_balance_infos);
+
+CCL_NAMESPACE_END