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  * @test TestEagerReclaimHumongousRegions
  26  * @bug 8027959
  27  * @summary Test to make sure that eager reclaim of humongous objects work. We simply try to fill
  28  * up the heap with humongous objects that should be eagerly reclaimable to avoid Full GC.
  29  * @key gc
  30  * @library /testlibrary
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  */
  34 
  35 import java.util.regex.Pattern;
  36 import java.util.regex.Matcher;
  37 import java.util.LinkedList;
  38 
  39 import jdk.test.lib.OutputAnalyzer;
  40 import jdk.test.lib.ProcessTools;
  41 import jdk.test.lib.Asserts;
  42 
  43 class ReclaimRegionFast {
  44     public static final int M = 1024*1024;
  45 
  46     public static LinkedList<Object> garbageList = new LinkedList<Object>();
  47 
  48     public static void genGarbage() {
  49         for (int i = 0; i < 32*1024; i++) {
  50             garbageList.add(new int[100]);
  51         }
  52         garbageList.clear();
  53     }
  54 
  55     // A large object referenced by a static.
  56     static int[] filler = new int[10 * M];
  57 
  58     public static void main(String[] args) {
  59 
  60         int[] large = new int[M];

  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  * @test TestEagerReclaimHumongousRegions
  26  * @bug 8027959
  27  * @summary Test to make sure that eager reclaim of humongous objects work. We simply try to fill
  28  * up the heap with humongous objects that should be eagerly reclaimable to avoid Full GC.
  29  * @key gc
  30  * @library /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  */
  34 
  35 import java.util.regex.Pattern;
  36 import java.util.regex.Matcher;
  37 import java.util.LinkedList;
  38 
  39 import jdk.test.lib.process.OutputAnalyzer;
  40 import jdk.test.lib.process.ProcessTools;
  41 import jdk.test.lib.Asserts;
  42 
  43 class ReclaimRegionFast {
  44     public static final int M = 1024*1024;
  45 
  46     public static LinkedList<Object> garbageList = new LinkedList<Object>();
  47 
  48     public static void genGarbage() {
  49         for (int i = 0; i < 32*1024; i++) {
  50             garbageList.add(new int[100]);
  51         }
  52         garbageList.clear();
  53     }
  54 
  55     // A large object referenced by a static.
  56     static int[] filler = new int[10 * M];
  57 
  58     public static void main(String[] args) {
  59 
  60         int[] large = new int[M];