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 Common AttemptOOM CPUSetsReader 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.DockerRunOptions;
  40 import jdk.test.lib.containers.docker.DockerTestUtils;
  41 import jdk.test.lib.Asserts;
  42 import jdk.test.lib.Platform;
  43 import jdk.test.lib.Utils;
  44 import jdk.test.lib.process.OutputAnalyzer;
  45 
  46 
  47 public class TestCPUSets {
  48     private static final String imageName = Common.imageName("cpusets");
  49 
  50     public static void main(String[] args) throws Exception {
  51         if (!DockerTestUtils.canTestDocker()) {
  52             return;
  53         }
  54 
  55         Common.prepareWhiteBox();
  56         DockerTestUtils.buildJdkDockerImage(imageName, "Dockerfile-BasicTest", "jdk-docker");
  57 
  58         try {
  59             // Sanity test the cpu sets reader and parser
  60             CPUSetsReader.test();
  61             testTheSet("Cpus_allowed_list");
  62             testTheSet("Mems_allowed_list");
  63         } finally {
  64             DockerTestUtils.removeDockerImage(imageName);
  65         }
  66     }
  67 
  68 
  69     private static void testTheSet(String setType) throws Exception {
  70         String cpuSetStr = CPUSetsReader.readFromProcStatus(setType);
  71 
  72         if (cpuSetStr == null) {
  73             System.out.printf("The %s test is skipped %n", setType);
  74         } else {
  75             List<Integer> cpuSet = CPUSetsReader.parseCpuSet(cpuSetStr);
  76 
  77             // Test subset of one, full subset, and half of the subset
  78             testCpuSet(CPUSetsReader.listToString(cpuSet, 1));
  79             if (cpuSet.size() > 1) {
  80                 testCpuSet(CPUSetsReader.listToString(cpuSet));
  81             }
  82             if (cpuSet.size() > 2) {
  83                 testCpuSet(CPUSetsReader.listToString(cpuSet, cpuSet.size()/2 ));
  84             }
  85         }
  86     }
  87 
  88 
  89     private static DockerRunOptions commonOpts() {
  90         DockerRunOptions opts = new DockerRunOptions(imageName, "/jdk/bin/java",
  91                                                      "PrintContainerInfo");
  92         opts.addDockerOpts("--volume", Utils.TEST_CLASSES + ":/test-classes/");
  93         opts.addJavaOpts("-Xlog:os+container=trace", "-cp", "/test-classes/");
  94         Common.addWhiteBoxOpts(opts);
  95         return opts;
  96     }
  97 
  98 
  99     private static void checkResult(List<String> lines, String lineMarker, String value) {
 100         boolean lineMarkerFound = false;
 101 
 102         for (String line : lines) {
 103             if (line.contains(lineMarker)) {
 104                 lineMarkerFound = true;
 105                 String[] parts = line.split(":");
 106                 System.out.println("DEBUG: line = " + line);
 107                 System.out.println("DEBUG: parts.length = " + parts.length);
 108 
 109                 Asserts.assertEquals(parts.length, 2);
 110                 String set = parts[1].replaceAll("\\s","");
 111                 String actual = CPUSetsReader.listToString(CPUSetsReader.parseCpuSet(set));
 112                 Asserts.assertEquals(actual, value);
 113                 break;
 114             }
 115         }
 116         Asserts.assertTrue(lineMarkerFound);
 117     }
 118 
 119 
 120     private static void testCpuSet(String value) throws Exception {
 121         Common.logNewTestCase("cpusets.cpus, value = " + value);
 122 
 123         DockerRunOptions opts = commonOpts();
 124         opts.addDockerOpts("--cpuset-cpus=" + value);
 125 
 126         List<String> lines = Common.run(opts).asLines();
 127         checkResult(lines, "cpuset.cpus is:", value);
 128     }
 129 
 130     private static void testMemSet(String value) throws Exception {
 131         Common.logNewTestCase("cpusets.mems, value = " + value);
 132 
 133         DockerRunOptions opts = commonOpts();
 134         opts.addDockerOpts("--cpuset-mems=" + value);
 135 
 136         List<String> lines = Common.run(opts).asLines();
 137         checkResult(lines, "cpuset.mems is:", value);
 138     }
 139 
 140 }