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  * @test TestDynamicNumberOfGCThreads
  26  * @bug 8017462
  27  * @summary Ensure that UseDynamicNumberOfGCThreads runs
  28  * @requires vm.gc=="null"
  29  * @key gc
  30  * @library /testlibrary
  31  */
  32 
  33 import com.oracle.java.testlibrary.ProcessTools;
  34 import com.oracle.java.testlibrary.OutputAnalyzer;



  35 
  36 public class TestDynamicNumberOfGCThreads {
  37   public static void main(String[] args) throws Exception {
  38 
  39     testDynamicNumberOfGCThreads("UseConcMarkSweepGC");

  40 
  41     testDynamicNumberOfGCThreads("UseG1GC");

  42 
  43     testDynamicNumberOfGCThreads("UseParallelGC");

  44   }
  45 
  46   private static void verifyDynamicNumberOfGCThreads(OutputAnalyzer output) {

  47     output.shouldContain("new_active_workers");
  48     output.shouldHaveExitValue(0);
  49   }
  50 
  51   private static void testDynamicNumberOfGCThreads(String gcFlag) throws Exception {
  52     // UseDynamicNumberOfGCThreads and TraceDynamicGCThreads enabled
  53     ProcessBuilder pb_enabled =
  54       ProcessTools.createJavaProcessBuilder("-XX:+" + gcFlag, "-Xmx10M", "-XX:+PrintGCDetails",  "-XX:+UseDynamicNumberOfGCThreads", "-XX:+TraceDynamicGCThreads", GCTest.class.getName());










  55     verifyDynamicNumberOfGCThreads(new OutputAnalyzer(pb_enabled.start()));
  56   }
  57 
  58   static class GCTest {
  59     private static byte[] garbage;
  60     public static void main(String [] args) {
  61       System.out.println("Creating garbage");
  62       // create 128MB of garbage. This should result in at least one GC
  63       for (int i = 0; i < 1024; i++) {
  64         garbage = new byte[128 * 1024];
  65       }
  66       System.out.println("Done");
  67     }
  68   }
  69 }

  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  * @test TestDynamicNumberOfGCThreads
  26  * @bug 8017462
  27  * @summary Ensure that UseDynamicNumberOfGCThreads runs
  28  * @requires vm.gc=="null"
  29  * @key gc
  30  * @library /testlibrary
  31  */
  32 
  33 import com.oracle.java.testlibrary.ProcessTools;
  34 import com.oracle.java.testlibrary.OutputAnalyzer;
  35 import java.util.ArrayList;
  36 import java.util.Arrays;
  37 import java.util.Collections;
  38 
  39 public class TestDynamicNumberOfGCThreads {
  40   public static void main(String[] args) throws Exception {
  41 
  42     testDynamicNumberOfGCThreads("UseConcMarkSweepGC", true);
  43     testDynamicNumberOfGCThreads("UseConcMarkSweepGC", false);
  44 
  45     testDynamicNumberOfGCThreads("UseG1GC", true);
  46     testDynamicNumberOfGCThreads("UseG1GC", false);
  47 
  48     testDynamicNumberOfGCThreads("UseParallelGC", true);
  49     testDynamicNumberOfGCThreads("UseParallelGC", false);
  50   }
  51 
  52   private static void verifyDynamicNumberOfGCThreads(OutputAnalyzer output) {
  53     output.shouldHaveExitValue(0); // test should run succesfully
  54     output.shouldContain("new_active_workers");

  55   }
  56 
  57   private static void testDynamicNumberOfGCThreads(String gcFlag, boolean emulate_uniprocessor) throws Exception {
  58     // UseDynamicNumberOfGCThreads and TraceDynamicGCThreads enabled
  59     String[] defaults = {"-XX:+" + gcFlag, "-Xmx10M", "-XX:+PrintGCDetails",  "-XX:+UseDynamicNumberOfGCThreads", "-XX:+TraceDynamicGCThreads", GCTest.class.getName()};
  60     ArrayList<String> args = new ArrayList();
  61     Collections.addAll(args, defaults);
  62     Arrays.asList(defaults);
  63     // Ensure it works on uniprocessors or if user specifies -XX:ParallelGCThread=1.
  64     if (emulate_uniprocessor) {
  65         args.add(0, "-XX:+ForceDynamicNumberOfGCThreads");
  66         args.add(0, "-XX:ParallelGCThreads=1");
  67     }
  68     String[] finalArgs = new String[args.size()];
  69     finalArgs = args.toArray(finalArgs);
  70     ProcessBuilder pb_enabled = ProcessTools.createJavaProcessBuilder(finalArgs);
  71     verifyDynamicNumberOfGCThreads(new OutputAnalyzer(pb_enabled.start()));
  72   }
  73 
  74   static class GCTest {
  75     private static byte[] garbage;
  76     public static void main(String [] args) {
  77       System.out.println("Creating garbage");
  78       // create 128MB of garbage. This should result in at least one GC
  79       for (int i = 0; i < 1024; i++) {
  80         garbage = new byte[128 * 1024];
  81       }
  82       System.out.println("Done");
  83     }
  84   }
  85 }