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 TestTargetSurvivorRatioFlag
  26  * @key gc
  27  * @summary Verify that option TargetSurvivorRatio affects survivor space occupancy after minor GC.
  28  * @requires (vm.opt.ExplicitGCInvokesConcurrent == null) | (vm.opt.ExplicitGCInvokesConcurrent == false)
  29  * @requires (vm.opt.UseJVMCICompiler == null) | (vm.opt.UseJVMCICompiler == false)
  30  * @library /testlibrary /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  * @build TestTargetSurvivorRatioFlag
  34  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  35  * @run driver TestTargetSurvivorRatioFlag
  36  */
  37 
  38 import jdk.test.lib.AllocationHelper;
  39 import java.lang.management.GarbageCollectorMXBean;
  40 import java.util.Arrays;
  41 import java.util.Collections;
  42 import java.util.LinkedList;
  43 import java.util.List;
  44 import java.util.regex.Matcher;
  45 import java.util.regex.Pattern;
  46 import jdk.test.lib.HeapRegionUsageTool;
  47 import jdk.internal.misc.Unsafe;
  48 import jdk.test.lib.OutputAnalyzer;
  49 import jdk.test.lib.ProcessTools;
  50 import jdk.test.lib.Utils;
  51 import sun.hotspot.WhiteBox;
  52 
  53 /* In order to test that TargetSurvivorRatio affects survivor space occupancy
  54  * we setup fixed MaxTenuringThreshold and then verifying that if size of allocated
  55  * objects is lower than (survivor_size * TargetSurvivorRatio / 100) then objects
  56  * will stay in survivor space until MaxTenuringThreshold minor GC cycles.
  57  * If more than (survivor_size * TargetSurvivorRatio / 100) objects were allocated,
  58  * then we verify that after MaxTenuringThreshold minor GC cycles survivor space
  59  * is almost empty.
  60  */
  61 public class TestTargetSurvivorRatioFlag {
  62 
  63     public static final long M = 1024 * 1024;
  64 
  65     // VM option values
  66     public static final long MAX_NEW_SIZE = 40 * M;
  67     public static final int SURVIVOR_RATIO = 8;
  68     public static final int MAX_TENURING_THRESHOLD = 15;
  69 

  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 TestTargetSurvivorRatioFlag
  26  * @key gc
  27  * @summary Verify that option TargetSurvivorRatio affects survivor space occupancy after minor GC.
  28  * @requires (vm.opt.ExplicitGCInvokesConcurrent == null) | (vm.opt.ExplicitGCInvokesConcurrent == false)
  29  * @requires (vm.opt.UseJVMCICompiler == null) | (vm.opt.UseJVMCICompiler == false)
  30  * @library /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  * @build sun.hotspot.WhiteBox
  34  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  35  * @run driver TestTargetSurvivorRatioFlag
  36  */
  37 

  38 import java.lang.management.GarbageCollectorMXBean;
  39 import java.util.Arrays;
  40 import java.util.Collections;
  41 import java.util.LinkedList;
  42 import java.util.List;
  43 import java.util.regex.Matcher;
  44 import java.util.regex.Pattern;

  45 import jdk.internal.misc.Unsafe;
  46 import jdk.test.lib.process.OutputAnalyzer;
  47 import jdk.test.lib.process.ProcessTools;
  48 import jdk.test.lib.Utils;
  49 import sun.hotspot.WhiteBox;
  50 
  51 /* In order to test that TargetSurvivorRatio affects survivor space occupancy
  52  * we setup fixed MaxTenuringThreshold and then verifying that if size of allocated
  53  * objects is lower than (survivor_size * TargetSurvivorRatio / 100) then objects
  54  * will stay in survivor space until MaxTenuringThreshold minor GC cycles.
  55  * If more than (survivor_size * TargetSurvivorRatio / 100) objects were allocated,
  56  * then we verify that after MaxTenuringThreshold minor GC cycles survivor space
  57  * is almost empty.
  58  */
  59 public class TestTargetSurvivorRatioFlag {
  60 
  61     public static final long M = 1024 * 1024;
  62 
  63     // VM option values
  64     public static final long MAX_NEW_SIZE = 40 * M;
  65     public static final int SURVIVOR_RATIO = 8;
  66     public static final int MAX_TENURING_THRESHOLD = 15;
  67