1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 /*
  26  * @test
  27  * @summary Test JVM's awareness of cpu sets (cpus and mems)
  28  * @requires docker.support
  29  * @requires (os.arch != "s390x")
  30  * @library /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  *          jdk.jartool/sun.tools.jar
  34  * @build AttemptOOM sun.hotspot.WhiteBox PrintContainerInfo
  35  * @run driver ClassFileInstaller -jar whitebox.jar sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
  36  * @run driver TestCPUSets
  37  */
  38 import java.util.List;
  39 import jdk.test.lib.containers.docker.Common;
  40 import jdk.test.lib.containers.docker.DockerRunOptions;
  41 import jdk.test.lib.containers.docker.DockerTestUtils;
  42 import jdk.test.lib.containers.cgroup.CPUSetsReader;
  43 import jdk.test.lib.Asserts;
  44 import jdk.test.lib.Platform;
  45 import jdk.test.lib.Utils;
  46 import jdk.test.lib.process.OutputAnalyzer;
  47 
  48 
  49 public class TestCPUSets {
  50     private static final String imageName = Common.imageName("cpusets");
  51 
  52     public static void main(String[] args) throws Exception {
  53         if (!DockerTestUtils.canTestDocker()) {
  54             return;
  55         }
  56 
  57         Common.prepareWhiteBox();
  58         DockerTestUtils.buildJdkDockerImage(imageName, "Dockerfile-BasicTest", "jdk-docker");
  59 
  60         try {
  61             // Sanity test the cpu sets reader and parser
  62             CPUSetsReader.test();
  63             testTheSet("Cpus_allowed_list");
  64             testTheSet("Mems_allowed_list");
  65         } finally {
  66             DockerTestUtils.removeDockerImage(imageName);
  67         }
  68     }
  69 
  70 
  71     private static void testTheSet(String setType) throws Exception {
  72         String cpuSetStr = CPUSetsReader.readFromProcStatus(setType);
  73 
  74         if (cpuSetStr == null) {
  75             System.out.printf("The %s test is skipped %n", setType);
  76         } else {
  77             List<Integer> cpuSet = CPUSetsReader.parseCpuSet(cpuSetStr);
  78 
  79             // Test subset of one, full subset, and half of the subset
  80             testCpuSet(CPUSetsReader.listToString(cpuSet, 1));
  81             if (cpuSet.size() > 1) {
  82                 testCpuSet(CPUSetsReader.listToString(cpuSet));
  83             }
  84             if (cpuSet.size() > 2) {
  85                 testCpuSet(CPUSetsReader.listToString(cpuSet, cpuSet.size()/2 ));
  86             }
  87         }
  88     }
  89 
  90 
  91     private static DockerRunOptions commonOpts() {
  92         DockerRunOptions opts = new DockerRunOptions(imageName, "/jdk/bin/java",
  93                                                      "PrintContainerInfo");
  94         opts.addDockerOpts("--volume", Utils.TEST_CLASSES + ":/test-classes/");
  95         opts.addJavaOpts("-Xlog:os+container=trace", "-cp", "/test-classes/");
  96         Common.addWhiteBoxOpts(opts);
  97         return opts;
  98     }
  99 
 100 
 101     private static void checkResult(List<String> lines, String lineMarker, String value) {
 102         boolean lineMarkerFound = false;
 103 
 104         for (String line : lines) {
 105             if (line.contains(lineMarker)) {
 106                 lineMarkerFound = true;
 107                 String[] parts = line.split(":");
 108                 System.out.println("DEBUG: line = " + line);
 109                 System.out.println("DEBUG: parts.length = " + parts.length);
 110 
 111                 Asserts.assertEquals(parts.length, 2);
 112                 String set = parts[1].replaceAll("\\s","");
 113                 String actual = CPUSetsReader.listToString(CPUSetsReader.parseCpuSet(set));
 114                 Asserts.assertEquals(actual, value);
 115                 break;
 116             }
 117         }
 118         Asserts.assertTrue(lineMarkerFound);
 119     }
 120 
 121 
 122     private static void testCpuSet(String value) throws Exception {
 123         Common.logNewTestCase("cpusets.cpus, value = " + value);
 124 
 125         DockerRunOptions opts = commonOpts();
 126         opts.addDockerOpts("--cpuset-cpus=" + value);
 127 
 128         List<String> lines = Common.run(opts).asLines();
 129         checkResult(lines, "cpuset.cpus is:", value);
 130     }
 131 
 132     private static void testMemSet(String value) throws Exception {
 133         Common.logNewTestCase("cpusets.mems, value = " + value);
 134 
 135         DockerRunOptions opts = commonOpts();
 136         opts.addDockerOpts("--cpuset-mems=" + value);
 137 
 138         List<String> lines = Common.run(opts).asLines();
 139         checkResult(lines, "cpuset.mems is:", value);
 140     }
 141 
 142 }