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
  26  * @summary Test checks output displayed with jstat -gccause.
  27  *          Test scenario:
  28  *          test several times provokes garbage collection in the debuggee application and after each garbage
  29  *          collection runs jstat. jstat should show that after garbage collection number of GC events and garbage
  30  *          collection time increase.
  31  * @modules java.base/jdk.internal.misc
  32  * @library /test/lib
  33  * @library ../share
  34  * @requires vm.opt.ExplicitGCInvokesConcurrent != true

  35  * @run main/othervm -XX:+UsePerfData -Xmx128M GcCauseTest01
  36  */
  37 import utils.*;
  38 
  39 public class GcCauseTest01 {
  40 
  41     public static void main(String[] args) throws Exception {
  42 
  43         // We will be running "jstat -gc" tool
  44         JstatGcCauseTool jstatGcTool = new JstatGcCauseTool(ProcessHandle.current().pid());
  45 
  46         // Run once and get the  results asserting that they are reasonable
  47         JstatGcCauseResults measurement1 = jstatGcTool.measure();
  48         measurement1.assertConsistency();
  49 
  50         GcProvoker gcProvoker = new GcProvoker();
  51 
  52         // Provoke GC then run the tool again and get the results  asserting that they are reasonable
  53         gcProvoker.provokeGc();
  54         JstatGcCauseResults measurement2 = jstatGcTool.measure();

  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
  26  * @summary Test checks output displayed with jstat -gccause.
  27  *          Test scenario:
  28  *          test several times provokes garbage collection in the debuggee application and after each garbage
  29  *          collection runs jstat. jstat should show that after garbage collection number of GC events and garbage
  30  *          collection time increase.
  31  * @modules java.base/jdk.internal.misc
  32  * @library /test/lib
  33  * @library ../share
  34  * @requires vm.opt.ExplicitGCInvokesConcurrent != true
  35  * @requires vm.gc != "Z"
  36  * @run main/othervm -XX:+UsePerfData -Xmx128M GcCauseTest01
  37  */
  38 import utils.*;
  39 
  40 public class GcCauseTest01 {
  41 
  42     public static void main(String[] args) throws Exception {
  43 
  44         // We will be running "jstat -gc" tool
  45         JstatGcCauseTool jstatGcTool = new JstatGcCauseTool(ProcessHandle.current().pid());
  46 
  47         // Run once and get the  results asserting that they are reasonable
  48         JstatGcCauseResults measurement1 = jstatGcTool.measure();
  49         measurement1.assertConsistency();
  50 
  51         GcProvoker gcProvoker = new GcProvoker();
  52 
  53         // Provoke GC then run the tool again and get the results  asserting that they are reasonable
  54         gcProvoker.provokeGc();
  55         JstatGcCauseResults measurement2 = jstatGcTool.measure();