--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/g1/TestSummarizeRSetStatsTools.java Thu Sep 26 12:49:45 2013 +0200
@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2013, Oracle and/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.
+ *
+ * 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.
+ */
+
+/*
+ * Common helpers for TestSummarizeRSetStats* tests
+ */
+
+import sun.management.ManagementFactoryHelper;
+import com.sun.management.HotSpotDiagnosticMXBean;
+import com.sun.management.VMOption;
+
+import com.oracle.java.testlibrary.*;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.lang.Thread;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+class VerifySummaryOutput {
+ // 4M size, both are directly allocated into the old gen
+ static Object[] largeObject1 = new Object[1024 * 1024];
+ static Object[] largeObject2 = new Object[1024 * 1024];
+
+ static int[] temp;
+
+ public static void main(String[] args) {
+ // create some cross-references between these objects
+ for (int i = 0; i < largeObject1.length; i++) {
+ largeObject1[i] = largeObject2;
+ }
+
+ for (int i = 0; i < largeObject2.length; i++) {
+ largeObject2[i] = largeObject1;
+ }
+
+ int numGCs = Integer.parseInt(args[0]);
+
+ if (numGCs > 0) {
+ // try to force a minor collection: the young gen is 4M, the
+ // amount of data allocated below is roughly that (4*1024*1024 +
+ // some header data)
+ for (int i = 0; i < 1024 ; i++) {
+ temp = new int[1024];
+ }
+ }
+
+ for (int i = 0; i < numGCs - 1; i++) {
+ System.gc();
+ }
+ }
+}
+
+public class TestSummarizeRSetStatsTools {
+
+ // the VM is currently run using G1GC, i.e. trying to test G1 functionality.
+ public static boolean testingG1GC() {
+ HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean();
+
+ VMOption option = diagnostic.getVMOption("UseG1GC");
+ if (option.getValue().equals("false")) {
+ System.out.println("Skipping this test. It is only a G1 test.");
+ return false;
+ }
+ return true;
+ }
+
+ public static String runTest(String[] additionalArgs, int numGCs) throws Exception {
+ ArrayList<String> finalargs = new ArrayList<String>();
+ String[] defaultArgs = new String[] {
+ "-XX:+UseG1GC",
+ "-XX:+UseCompressedOops",
+ "-Xmn4m",
+ "-Xmx20m",
+ "-XX:InitiatingHeapOccupancyPercent=100", // we don't want the additional GCs due to initial marking
+ "-XX:+PrintGC",
+ "-XX:+UnlockDiagnosticVMOptions",
+ "-XX:G1HeapRegionSize=1M",
+ };
+
+ finalargs.addAll(Arrays.asList(defaultArgs));
+
+ if (additionalArgs != null) {
+ finalargs.addAll(Arrays.asList(additionalArgs));
+ }
+
+ finalargs.add(VerifySummaryOutput.class.getName());
+ finalargs.add(String.valueOf(numGCs));
+
+ ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+ finalargs.toArray(new String[0]));
+ OutputAnalyzer output = new OutputAnalyzer(pb.start());
+
+ output.shouldHaveExitValue(0);
+
+ String result = output.getStdout();
+ return result;
+ }
+
+ private static void checkCounts(int expected, int actual, String which) throws Exception {
+ if (expected != actual) {
+ throw new Exception("RSet summaries mention " + which + " regions an incorrect number of times. Expected " + expected + ", got " + actual);
+ }
+ }
+
+ public static void expectPerRegionRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
+ expectRSetSummaries(result, expectedCumulative, expectedPeriodic);
+ int actualYoung = result.split("Young regions").length - 1;
+ int actualHumonguous = result.split("Humonguous regions").length - 1;
+ int actualFree = result.split("Free regions").length - 1;
+ int actualOther = result.split("Old regions").length - 1;
+
+ // the strings we check for above are printed four times per summary
+ int expectedPerRegionTypeInfo = (expectedCumulative + expectedPeriodic) * 4;
+
+ checkCounts(expectedPerRegionTypeInfo, actualYoung, "Young");
+ checkCounts(expectedPerRegionTypeInfo, actualHumonguous, "Humonguous");
+ checkCounts(expectedPerRegionTypeInfo, actualFree, "Free");
+ checkCounts(expectedPerRegionTypeInfo, actualOther, "Old");
+ }
+
+ public static void expectRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
+ int actualTotal = result.split("concurrent refinement").length - 1;
+ int actualCumulative = result.split("Cumulative RS summary").length - 1;
+
+ if (expectedCumulative != actualCumulative) {
+ throw new Exception("Incorrect amount of RSet summaries at the end. Expected " + expectedCumulative + ", got " + actualCumulative);
+ }
+
+ if (expectedPeriodic != (actualTotal - actualCumulative)) {
+ throw new Exception("Incorrect amount of per-period RSet summaries at the end. Expected " + expectedPeriodic + ", got " + (actualTotal - actualCumulative));
+ }
+ }
+}
+