1 /* 2 * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 /* 25 * @test TestThreadCounts 26 * @summary Test that Shenandoah GC thread counts are handled well 27 * @key gc 28 * @requires vm.gc.Shenandoah & !vm.graal.enabled 29 * @library /test/lib 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 * @run driver TestThreadCounts 33 */ 34 35 import jdk.test.lib.process.ProcessTools; 36 import jdk.test.lib.process.OutputAnalyzer; 37 38 public class TestThreadCounts { 39 public static void main(String[] args) throws Exception { 40 for (int conc = 0; conc < 16; conc++) { 41 for (int par = 0; par < 16; par++) { 42 testWith(conc, par); 43 } 44 } 45 } 46 47 private static void testWith(int conc, int par) throws Exception { 48 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions", 49 "-XX:+UnlockExperimentalVMOptions", 50 "-XX:+UseShenandoahGC", 51 "-XX:ConcGCThreads=" + conc, 52 "-XX:ParallelGCThreads=" + par, 53 "-version"); 54 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 55 56 if (conc == 0) { 57 output.shouldContain("Shenandoah expects ConcGCThreads > 0"); 58 output.shouldHaveExitValue(1); 59 } else if (par == 0) { 60 output.shouldContain("Shenandoah expects ParallelGCThreads > 0"); 61 output.shouldHaveExitValue(1); 62 } else if (conc > par) { 63 output.shouldContain("Shenandoah expects ConcGCThreads <= ParallelGCThreads"); 64 output.shouldHaveExitValue(1); 65 } else { 66 output.shouldNotContain("Shenandoah expects ConcGCThreads <= ParallelGCThreads"); 67 output.shouldHaveExitValue(0); 68 } 69 } 70 71 }