Differential D12367 Diff 41308 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;

				/* 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