Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: test/runtime/os/AvailableProcessors.java
test/runtime/os/AvailableProcessors.java
- changeset 8923
- 82f3ae5b4190
- parent 8619
- 3a38e441474d
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| 8922:864d59bedf3d | 8923:82f3ae5b4190 |
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| 1 /* | |
| 2 * Copyright (c) 2016, 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 import java.io.File; | |
| 24 import com.oracle.java.testlibrary.ProcessTools; | |
| 25 import com.oracle.java.testlibrary.OutputAnalyzer; | |
| 26 import java.util.ArrayList; | |
| 27 | |
| 28 /* | |
| 29 * @test | |
| 30 * @bug 6515172 | |
| 31 * @summary Check that availableProcessors reports the correct value when running in a cpuset on linux | |
| 32 * @requires os.family == "linux" | |
| 33 * @library /testlibrary | |
| 34 * @build com.oracle.java.testlibrary.* | |
| 35 * @run driver AvailableProcessors | |
| 36 */ | |
| 37 public class AvailableProcessors { | |
| 38 | |
| 39 static final String SUCCESS_STRING = "Found expected processors: "; | |
| 40 | |
| 41 public static void main(String[] args) throws Throwable { | |
| 42 if (args.length > 0) | |
| 43 checkProcessors(Integer.parseInt(args[0])); | |
| 44 else { | |
| 45 // run ourselves under different cpu configurations | |
| 46 // using the taskset command | |
| 47 String taskset; | |
| 48 final String taskset1 = "/bin/taskset"; | |
| 49 final String taskset2 = "/usr/bin/taskset"; | |
| 50 if (new File(taskset1).exists()) | |
| 51 taskset = taskset1; | |
| 52 else if (new File(taskset2).exists()) | |
| 53 taskset = taskset2; | |
| 54 else { | |
| 55 System.out.println("Skipping test: could not find taskset command"); | |
| 56 return; | |
| 57 } | |
| 58 | |
| 59 int available = Runtime.getRuntime().availableProcessors(); | |
| 60 | |
| 61 if (available == 1) { | |
| 62 System.out.println("Skipping test: only one processor available"); | |
| 63 return; | |
| 64 } | |
| 65 | |
| 66 // Get the java command we want to execute | |
| 67 // Enable logging for easier failure diagnosis | |
| 68 ProcessBuilder master = | |
| 69 ProcessTools.createJavaProcessBuilder(false, | |
| 70 "-XX:+UnlockDiagnosticVMOptions", | |
| 71 "-XX:+PrintActiveCpus", | |
| 72 "AvailableProcessors"); | |
| 73 | |
| 74 int[] expected = new int[] { 1, available/2, available-1, available }; | |
| 75 | |
| 76 for (int i : expected) { | |
| 77 System.out.println("Testing for " + i + " processors ..."); | |
| 78 int max = i - 1; | |
| 79 ArrayList<String> cmdline = new ArrayList<>(master.command()); | |
| 80 // prepend taskset command | |
| 81 cmdline.add(0, "0-" + max); | |
| 82 cmdline.add(0, "-c"); | |
| 83 cmdline.add(0, taskset); | |
| 84 // append expected processor count | |
| 85 cmdline.add(String.valueOf(i)); | |
| 86 ProcessBuilder pb = new ProcessBuilder(cmdline); | |
| 87 System.out.println("Final command line: " + | |
| 88 ProcessTools.getCommandLine(pb)); | |
| 89 OutputAnalyzer output = ProcessTools.executeProcess(pb); | |
| 90 output.shouldContain(SUCCESS_STRING); | |
| 91 } | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 static void checkProcessors(int expected) { | |
| 96 int available = Runtime.getRuntime().availableProcessors(); | |
| 97 if (available != expected) | |
| 98 throw new Error("Expected " + expected + " processors, but found " | |
| 99 + available); | |
| 100 else | |
| 101 System.out.println(SUCCESS_STRING + available); | |
| 102 } | |
| 103 } |
