| /** |
| * 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.yarn.server.nodemanager.containermanager.scheduler; |
| |
| import org.apache.hadoop.yarn.api.records.Resource; |
| import org.apache.hadoop.yarn.api.records.ResourceUtilization; |
| import org.apache.hadoop.yarn.server.api.records.ResourceThresholds; |
| import org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitor; |
| import org.apache.hadoop.yarn.util.resource.Resources; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import static org.mockito.Matchers.anyBoolean; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.when; |
| |
| /** |
| * Unit tests for {@link SnapshotBasedOverAllocationPolicy}. |
| */ |
| public class TestSnapshotBasedOverAllocationPolicy { |
| private final ContainersMonitor containersMonitor = |
| mock(ContainersMonitor.class); |
| private ResourceThresholds overAllocationThresholds = |
| ResourceThresholds.newInstance(0.8f, 0.8f); |
| |
| private static final long MEMORY_CAPACITY_BYTE = 512 * 1024 * 1024 * 1024L; |
| private static final int VCORE_CAPACITY = 10; |
| |
| @Before |
| public void setUp() { |
| // the node has an allocation of 512 GBs of memory and 10 vcores |
| when(containersMonitor.getPmemAllocatedForContainers()) |
| .thenReturn(MEMORY_CAPACITY_BYTE); |
| when(containersMonitor.getVCoresAllocatedForContainers()) |
| .thenReturn((long)VCORE_CAPACITY); |
| } |
| |
| /** |
| * Get the amount of memory in MBs given a memory utilization percentage. |
| * @param memoryUtilization memory utilization in [0, 1.0] |
| * @return the memory in MBs |
| */ |
| private static int getMemoryMBs(double memoryUtilization) { |
| return (int) (Math.round(memoryUtilization * MEMORY_CAPACITY_BYTE) >> 20); |
| } |
| |
| @Test |
| public void testNoVcoresAvailable() { |
| SnapshotBasedOverAllocationPolicy overAllocationPolicy = |
| new SnapshotBasedOverAllocationPolicy( |
| overAllocationThresholds, containersMonitor); |
| |
| // the current cpu utilization is over the threshold, 0.8 |
| when(containersMonitor.getContainersUtilization(anyBoolean())).thenReturn( |
| new ContainersMonitor.ContainersResourceUtilization( |
| ResourceUtilization.newInstance(0, 0, 0.9f), |
| System.currentTimeMillis())); |
| Resource available = overAllocationPolicy.getAvailableResources(); |
| Assert.assertEquals( |
| "There should be no resources available for overallocation", |
| Resources.none(), available); |
| } |
| |
| @Test |
| public void testNoMemoryAvailable() { |
| SnapshotBasedOverAllocationPolicy overAllocationPolicy = |
| new SnapshotBasedOverAllocationPolicy( |
| overAllocationThresholds, containersMonitor); |
| |
| // the current memory utilization is over the threshold, 0.8 |
| when(containersMonitor.getContainersUtilization(anyBoolean())).thenReturn( |
| new ContainersMonitor.ContainersResourceUtilization( |
| ResourceUtilization.newInstance( |
| getMemoryMBs(0.9), 0, 0.0f), |
| System.currentTimeMillis())); |
| Resource available = overAllocationPolicy.getAvailableResources(); |
| Assert.assertEquals( |
| "There should be no resources available for overallocation", |
| Resources.none(), available); |
| } |
| |
| @Test |
| public void testNoMemoryVcoreAvailable() { |
| SnapshotBasedOverAllocationPolicy overAllocationPolicy = |
| new SnapshotBasedOverAllocationPolicy( |
| overAllocationThresholds, containersMonitor); |
| |
| // the current memory utilization is over the threshold, 0.8 |
| when(containersMonitor.getContainersUtilization(anyBoolean())).thenReturn( |
| new ContainersMonitor.ContainersResourceUtilization( |
| ResourceUtilization.newInstance( |
| getMemoryMBs(0.9), 0, 0.9f), |
| System.currentTimeMillis())); |
| Resource available = overAllocationPolicy.getAvailableResources(); |
| Assert.assertEquals( |
| "There should be no resources available for overallocation", |
| Resources.none(), available); |
| } |
| |
| @Test |
| public void testResourcesAvailable() { |
| SnapshotBasedOverAllocationPolicy overAllocationPolicy = |
| new SnapshotBasedOverAllocationPolicy( |
| overAllocationThresholds, containersMonitor); |
| |
| // the current memory and cpu utilization are both below the threshold |
| int memoryUtilizationMBs = getMemoryMBs(0.6); |
| when(containersMonitor.getContainersUtilization(anyBoolean())).thenReturn( |
| new ContainersMonitor.ContainersResourceUtilization( |
| ResourceUtilization.newInstance(memoryUtilizationMBs, 0, 0.6f), |
| System.currentTimeMillis())); |
| Resource available = overAllocationPolicy.getAvailableResources(); |
| Assert.assertEquals("Unexpected resources available for overallocation", |
| Resource.newInstance( |
| getMemoryMBs(0.8) - memoryUtilizationMBs, |
| Math.round(0.2f * VCORE_CAPACITY)), |
| available); |
| } |
| |
| @Test |
| public void testResourcesAvailableWithZeroUtilization() { |
| SnapshotBasedOverAllocationPolicy overAllocationPolicy = |
| new SnapshotBasedOverAllocationPolicy( |
| overAllocationThresholds, containersMonitor); |
| |
| // the current memory and cpu utilization are zeros |
| when(containersMonitor.getContainersUtilization(anyBoolean())).thenReturn( |
| new ContainersMonitor.ContainersResourceUtilization( |
| ResourceUtilization.newInstance(0, 0, 0.0f), |
| System.currentTimeMillis())); |
| Resource available = overAllocationPolicy.getAvailableResources(); |
| Assert.assertEquals("Unexpected resources available for overallocation", |
| Resource.newInstance( |
| getMemoryMBs(0.8), Math.round(0.8f * VCORE_CAPACITY)), |
| available); |
| } |
| } |