test/hotspot/jtreg/gc/shenandoah/TestPeriodicGC.java

*** 1,7 ***
--- 1,8 ---
  /*
   * Copyright (c) 2017, 2020, Red Hat, Inc. All rights reserved.
+  * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.

*** 43,15 ***
          cmds[args.length] = TestPeriodicGC.class.getName();
          cmds[args.length + 1] = "test";
          OutputAnalyzer output = ProcessTools.executeLimitedTestJava(cmds);
  
          output.shouldHaveExitValue(0);
!         if (periodic && !output.getOutput().contains("Trigger: Time since last GC")) {
!             throw new AssertionError(msg + ": Should have periodic GC in logs");
          }
!         if (!periodic && output.getOutput().contains("Trigger: Time since last GC")) {
!             throw new AssertionError(msg + ": Should not have periodic GC in logs");
          }
      }
  
      public static void main(String[] args) throws Exception {
          if (args.length > 0 && args[0].equals("test")) {
--- 44,32 ---
          cmds[args.length] = TestPeriodicGC.class.getName();
          cmds[args.length + 1] = "test";
          OutputAnalyzer output = ProcessTools.executeLimitedTestJava(cmds);
  
          output.shouldHaveExitValue(0);
!         if (periodic) {
!             output.shouldContain("Trigger: Time since last GC");
          }
!         if (!periodic) {
!             output.shouldNotContain("Trigger: Time since last GC");
+         }
+     }
+ 
+     public static void testGenerational(boolean periodic, String... args) throws Exception {
+         String[] cmds = Arrays.copyOf(args, args.length + 2);
+         cmds[args.length] = TestPeriodicGC.class.getName();
+         cmds[args.length + 1] = "test";
+         ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(cmds);
+ 
+         OutputAnalyzer output = new OutputAnalyzer(pb.start());
+         output.shouldHaveExitValue(0);
+         if (periodic) {
+             output.shouldContain("Trigger (Young): Time since last GC");
+             output.shouldContain("Trigger (Old): Time since last GC");
+         } else {
+             output.shouldNotContain("Trigger (Young): Time since last GC");
+             output.shouldNotContain("Trigger (Old): Time since last GC");
          }
      }
  
      public static void main(String[] args) throws Exception {
          if (args.length > 0 && args[0].equals("test")) {

*** 124,8 ***
--- 142,28 ---
                   "-XX:+UnlockExperimentalVMOptions",
                   "-XX:+UseShenandoahGC",
                   "-XX:ShenandoahGCMode=passive",
                   "-XX:ShenandoahGuaranteedGCInterval=1000"
          );
+ 
+         testGenerational(true,
+                          "-Xlog:gc",
+                          "-XX:+UnlockDiagnosticVMOptions",
+                          "-XX:+UnlockExperimentalVMOptions",
+                          "-XX:+UseShenandoahGC",
+                          "-XX:ShenandoahGCMode=generational",
+                          "-XX:ShenandoahGuaranteedYoungGCInterval=1000",
+                          "-XX:ShenandoahGuaranteedOldGCInterval=1500"
+         );
+ 
+         testGenerational(false,
+                          "-Xlog:gc",
+                          "-XX:+UnlockDiagnosticVMOptions",
+                          "-XX:+UnlockExperimentalVMOptions",
+                          "-XX:+UseShenandoahGC",
+                          "-XX:ShenandoahGCMode=generational",
+                          "-XX:ShenandoahGuaranteedYoungGCInterval=0",
+                          "-XX:ShenandoahGuaranteedOldGCInterval=0"
+         );
      }
  
  }