| // Copyright 2016 The Bazel Authors. All rights reserved. |
| // |
| // 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. |
| |
| package com.google.devtools.build.lib.actions; |
| |
| import com.sun.management.OperatingSystemMXBean; |
| import java.lang.management.ManagementFactory; |
| |
| /** This class computes the local host's resource capacity. */ |
| final class LocalHostResource { |
| |
| private static final ResourceSet DEFAULT_RESOURCES = |
| ResourceSet.create( |
| // Only com.sun.management.OperatingSystemMXBean provides the total physical memory size. |
| // This bean is container-aware as of JDK 14. |
| // https://github.com/openjdk/jdk/commit/7b82266a159ce363708e347aba7e1b0d38206b48 |
| ((OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean()) |
| .getTotalPhysicalMemorySize() |
| / (1024.0 * 1024.0), |
| // As of JDK 11, availableProcessors is aware of cgroups as commonly used by containers. |
| // https://hg.openjdk.java.net/jdk/hs/rev/7f22774a5f42#l6.178 |
| Runtime.getRuntime().availableProcessors(), |
| Integer.MAX_VALUE); |
| |
| public static ResourceSet get() { |
| return DEFAULT_RESOURCES; |
| } |
| |
| private LocalHostResource() {} |
| } |