| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| package org.apache.hadoop.mapreduce.v2.app.rm; |
| |
| import org.apache.hadoop.yarn.api.records.Resource; |
| import org.apache.hadoop.yarn.proto.YarnServiceProtos.SchedulerResourceTypes; |
| |
| import java.util.EnumSet; |
| |
| public class ResourceCalculatorUtils { |
| public static int divideAndCeil(long a, long b) { |
| if (b == 0) { |
| return 0; |
| } |
| return (int) ((a + (b - 1)) / b); |
| } |
| |
| public static int computeAvailableContainers(Resource available, |
| Resource required, EnumSet<SchedulerResourceTypes> resourceTypes) { |
| if (resourceTypes.contains(SchedulerResourceTypes.CPU)) { |
| return Math.min( |
| calculateRatioOrMaxValue(available.getMemorySize(), required.getMemorySize()), |
| calculateRatioOrMaxValue(available.getVirtualCores(), required |
| .getVirtualCores())); |
| } |
| return calculateRatioOrMaxValue( |
| available.getMemorySize(), required.getMemorySize()); |
| } |
| |
| public static int divideAndCeilContainers(Resource required, Resource factor, |
| EnumSet<SchedulerResourceTypes> resourceTypes) { |
| if (resourceTypes.contains(SchedulerResourceTypes.CPU)) { |
| return Math.max(divideAndCeil(required.getMemorySize(), factor.getMemorySize()), |
| divideAndCeil(required.getVirtualCores(), factor.getVirtualCores())); |
| } |
| return divideAndCeil(required.getMemorySize(), factor.getMemorySize()); |
| } |
| |
| private static int calculateRatioOrMaxValue(long numerator, long denominator) { |
| if (denominator == 0) { |
| return Integer.MAX_VALUE; |
| } |
| return (int) (numerator / denominator); |
| } |
| } |