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/*
* Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/*
* @test TestThreadCounts
* @summary Test that Shenandoah GC thread counts are handled well
* @key gc
* @requires vm.gc.Shenandoah & !vm.graal.enabled
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @run driver TestThreadCounts
*/
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
public class TestThreadCounts {
public static void main(String[] args) throws Exception {
for (int conc = 0; conc < 16; conc++) {
for (int par = 0; par < 16; par++) {
testWith(conc, par);
}
}
}
private static void testWith(int conc, int par) throws Exception {
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
"-Xmx128m",
"-XX:+UnlockDiagnosticVMOptions",
"-XX:+UnlockExperimentalVMOptions",
"-XX:+UseShenandoahGC",
"-XX:ConcGCThreads=" + conc,
"-XX:ParallelGCThreads=" + par,
"-version");
OutputAnalyzer output = new OutputAnalyzer(pb.start());
if (conc == 0) {
output.shouldContain("Shenandoah expects ConcGCThreads > 0");
output.shouldHaveExitValue(1);
} else if (par == 0) {
output.shouldContain("Shenandoah expects ParallelGCThreads > 0");
output.shouldHaveExitValue(1);
} else if (conc > par) {
output.shouldContain("Shenandoah expects ConcGCThreads <= ParallelGCThreads");
output.shouldHaveExitValue(1);
} else {
output.shouldNotContain("Shenandoah expects ConcGCThreads <= ParallelGCThreads");
output.shouldHaveExitValue(0);
}
}
}
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