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test/hotspot/jtreg/serviceability/tmtools/jstat/GcTest01.java

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  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 -gc.
  27  *          Test scenario:
  28  *          test several times provokes garbage collection
  29  *          in the debuggee application
  30  *          and after each garbage collection runs jstat.
  31  *          jstat should show that after garbage collection
  32  *          number of GC events and garbage
  33  *          collection time increase.
  34  * @modules java.base/jdk.internal.misc
  35  * @library /test/lib
  36  * @library ../share
  37  * @requires vm.opt.ExplicitGCInvokesConcurrent != true
  38  * @requires vm.gc != "Z"
  39  * @run main/othervm -XX:+UsePerfData -Xmx128M GcTest01
  40  */
  41 import utils.*;
  42 
  43 public class GcTest01 {
  44 
  45     public static void main(String[] args) throws Exception {
  46 
  47         // We will be running "jstat -gc" tool
  48         JstatGcTool jstatGcTool = new JstatGcTool(ProcessHandle.current().pid());
  49 
  50         // Run once and get the  results asserting that they are reasonable
  51         JstatGcResults measurement1 = jstatGcTool.measure();
  52         measurement1.assertConsistency();
  53 
  54         GcProvoker gcProvoker = new GcProvoker();
  55 
  56         // Provoke GC then run the tool again and get the results
  57         // asserting that they are reasonable
  58         gcProvoker.provokeGc();


  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 -gc.
  27  *          Test scenario:
  28  *          test several times provokes garbage collection
  29  *          in the debuggee application
  30  *          and after each garbage collection runs jstat.
  31  *          jstat should show that after garbage collection
  32  *          number of GC events and garbage
  33  *          collection time increase.
  34  * @modules java.base/jdk.internal.misc
  35  * @library /test/lib
  36  * @library ../share
  37  * @requires vm.opt.ExplicitGCInvokesConcurrent != true
  38  * @requires vm.gc != "Z" & vm.gc != "Shenandoah"
  39  * @run main/othervm -XX:+UsePerfData -Xmx128M GcTest01
  40  */
  41 import utils.*;
  42 
  43 public class GcTest01 {
  44 
  45     public static void main(String[] args) throws Exception {
  46 
  47         // We will be running "jstat -gc" tool
  48         JstatGcTool jstatGcTool = new JstatGcTool(ProcessHandle.current().pid());
  49 
  50         // Run once and get the  results asserting that they are reasonable
  51         JstatGcResults measurement1 = jstatGcTool.measure();
  52         measurement1.assertConsistency();
  53 
  54         GcProvoker gcProvoker = new GcProvoker();
  55 
  56         // Provoke GC then run the tool again and get the results
  57         // asserting that they are reasonable
  58         gcProvoker.provokeGc();
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