--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/gc/shenandoah/TestPeriodicGC.java	Mon Dec 10 15:47:44 2018 +0100
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
+ *
+ * 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+/*
+ * @test TestPeriodicGC
+ * @summary Test that periodic GC is working
+ * @key gc
+ * @requires vm.gc.Shenandoah
+ * @library /test/lib
+ * @run driver TestPeriodicGC
+ */
+
+import java.util.*;
+
+import jdk.test.lib.Asserts;
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.process.OutputAnalyzer;
+
+public class TestPeriodicGC {
+
+    public static void testWith(String msg, 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.createJavaProcessBuilder(cmds);
+
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        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")) {
+            Thread.sleep(5000); // stay idle
+            return;
+        }
+
+        String[] enabled = new String[] {
+                "adaptive",
+                "compact",
+                "static",
+                "traversal",
+        };
+
+        String[] disabled = new String[] {
+                "aggressive",
+                "passive",
+        };
+
+        for (String h : enabled) {
+            testWith("Short period with " + h,
+                    true,
+                    "-Xlog:gc",
+                    "-XX:+UnlockDiagnosticVMOptions",
+                    "-XX:+UnlockExperimentalVMOptions",
+                    "-XX:+UseShenandoahGC",
+                    "-XX:ShenandoahGCHeuristics=" + h,
+                    "-XX:ShenandoahGuaranteedGCInterval=1000"
+            );
+
+            testWith("Long period with " + h,
+                    false,
+                    "-Xlog:gc",
+                    "-XX:+UnlockDiagnosticVMOptions",
+                    "-XX:+UnlockExperimentalVMOptions",
+                    "-XX:+UseShenandoahGC",
+                    "-XX:ShenandoahGCHeuristics=" + h,
+                    "-XX:ShenandoahGuaranteedGCInterval=100000" // deliberately too long
+            );
+        }
+
+        for (String h : disabled) {
+            testWith("Short period with " + h,
+                    false,
+                    "-Xlog:gc",
+                    "-XX:+UnlockDiagnosticVMOptions",
+                    "-XX:+UnlockExperimentalVMOptions",
+                    "-XX:+UseShenandoahGC",
+                    "-XX:ShenandoahGCHeuristics=" + h,
+                    "-XX:ShenandoahGuaranteedGCInterval=1000"
+            );
+        }
+    }
+
+}