| /** |
| * 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.ResourceUtilization; |
| import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container; |
| import org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitor; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * An implementation of the {@link ResourceUtilizationTracker} that equates |
| * resource utilization with the total resource allocated to the container. |
| */ |
| public class AllocationBasedResourceUtilizationTracker implements |
| ResourceUtilizationTracker { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(AllocationBasedResourceUtilizationTracker.class); |
| |
| private ResourceUtilization containersAllocation; |
| private ContainerScheduler scheduler; |
| |
| AllocationBasedResourceUtilizationTracker(ContainerScheduler scheduler) { |
| this.containersAllocation = ResourceUtilization.newInstance(0, 0, 0.0f); |
| this.scheduler = scheduler; |
| } |
| |
| /** |
| * Get the accumulation of totally allocated resources to a container. |
| * @return ResourceUtilization Resource Utilization. |
| */ |
| @Override |
| public ResourceUtilization getCurrentUtilization() { |
| return this.containersAllocation; |
| } |
| |
| /** |
| * Add Container's resources to the accumulated Utilization. |
| * @param container Container. |
| */ |
| @Override |
| public void addContainerResources(Container container) { |
| ContainersMonitor.ContainerManagerUtils.increaseResourceUtilization( |
| getContainersMonitor(), this.containersAllocation, |
| container.getResource()); |
| } |
| |
| /** |
| * Subtract Container's resources to the accumulated Utilization. |
| * @param container Container. |
| */ |
| @Override |
| public void subtractContainerResource(Container container) { |
| ContainersMonitor.ContainerManagerUtils.decreaseResourceUtilization( |
| getContainersMonitor(), this.containersAllocation, |
| container.getResource()); |
| } |
| |
| /** |
| * Check if NM has resources available currently to run the container. |
| * @param container Container. |
| * @return True, if NM has resources available currently to run the container. |
| */ |
| @Override |
| public boolean hasResourcesAvailable(Container container) { |
| long pMemBytes = container.getResource().getMemorySize() * 1024 * 1024L; |
| return hasResourcesAvailable(pMemBytes, |
| (long) (getContainersMonitor().getVmemRatio()* pMemBytes), |
| container.getResource().getVirtualCores()); |
| } |
| |
| private boolean hasResourcesAvailable(long pMemBytes, long vMemBytes, |
| int cpuVcores) { |
| // Check physical memory. |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("pMemCheck [current={} + asked={} > allowed={}]", |
| this.containersAllocation.getPhysicalMemory(), |
| (pMemBytes >> 20), |
| (getContainersMonitor().getPmemAllocatedForContainers() >> 20)); |
| } |
| if (this.containersAllocation.getPhysicalMemory() + |
| (int) (pMemBytes >> 20) > |
| (int) (getContainersMonitor() |
| .getPmemAllocatedForContainers() >> 20)) { |
| return false; |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("before vMemCheck" + |
| "[isEnabled={}, current={} + asked={} > allowed={}]", |
| getContainersMonitor().isVmemCheckEnabled(), |
| this.containersAllocation.getVirtualMemory(), (vMemBytes >> 20), |
| (getContainersMonitor().getVmemAllocatedForContainers() >> 20)); |
| } |
| // Check virtual memory. |
| if (getContainersMonitor().isVmemCheckEnabled() && |
| this.containersAllocation.getVirtualMemory() + |
| (int) (vMemBytes >> 20) > |
| (int) (getContainersMonitor() |
| .getVmemAllocatedForContainers() >> 20)) { |
| return false; |
| } |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("before cpuCheck [asked={} > allowed={}]", |
| this.containersAllocation.getCPU(), |
| getContainersMonitor().getVCoresAllocatedForContainers()); |
| } |
| // Check CPU. Compare using integral values of cores to avoid decimal |
| // inaccuracies. |
| if (!hasEnoughCpu(this.containersAllocation.getCPU(), |
| getContainersMonitor().getVCoresAllocatedForContainers(), cpuVcores)) { |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Returns whether there is enough space for coresRequested in totalCores. |
| * Converts currentAllocation usage to nearest integer count before comparing, |
| * as floats are inherently imprecise. NOTE: this calculation assumes that |
| * requested core counts must be integers, and currentAllocation core count |
| * must also be an integer. |
| * |
| * @param currentAllocation The current allocation, a float value from 0 to 1. |
| * @param totalCores The total cores in the system. |
| * @param coresRequested The number of cores requested. |
| * @return True if currentAllocationtotalCores*coresRequested <= |
| * totalCores. |
| */ |
| public boolean hasEnoughCpu(float currentAllocation, long totalCores, |
| int coresRequested) { |
| // Must not cast here, as it would truncate the decimal digits. |
| return Math.round(currentAllocation * totalCores) |
| + coresRequested <= totalCores; |
| } |
| |
| public ContainersMonitor getContainersMonitor() { |
| return this.scheduler.getContainersMonitor(); |
| } |
| } |