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/*
* Copyright (c) 2015, 2016, 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.
*/
/*
* @test TestNewRatioFlag
* @key gc
* @bug 8025166
* @summary Verify that heap devided among generations according to NewRatio
* @requires vm.gc != "Z" & vm.gc != "Shenandoah"
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* @run driver TestNewRatioFlag
*/
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.Utils;
import sun.hotspot.WhiteBox;
public class TestNewRatioFlag {
public static final long M = 1024 * 1024;
public static final long HEAP_SIZE = 100 * M;
public static void main(String args[]) throws Exception {
LinkedList<String> options = new LinkedList<>(
Arrays.asList(Utils.getFilteredTestJavaOpts("(-XX:[^ ]*NewSize=[^ ]+)|(-Xm[ns][^ ]+)"))
);
testNewRatio(4, options);
testNewRatio(6, options);
testNewRatio(10, options);
testNewRatio(15, options);
testNewRatio(20, options);
}
/**
* Verify that actual size of young gen conforms specified NewRatio
*
* @param ratio value of NewRatio option
* @param options additional options for VM
*/
public static void testNewRatio(int ratio, LinkedList<String> options) throws Exception {
LinkedList<String> vmOptions = new LinkedList<>(options);
Collections.addAll(vmOptions,
"-Xbootclasspath/a:.",
"-XX:+UnlockDiagnosticVMOptions",
"-XX:+WhiteBoxAPI",
"-XX:GCLockerEdenExpansionPercent=0",
"-Xmx" + HEAP_SIZE,
"-Xms" + HEAP_SIZE,
"-XX:NewRatio=" + ratio,
"-XX:-UseLargePages",
NewRatioVerifier.class.getName(),
Integer.toString(ratio)
);
ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(vmOptions.toArray(new String[vmOptions.size()]));
OutputAnalyzer analyzer = new OutputAnalyzer(procBuilder.start());
analyzer.shouldHaveExitValue(0);
System.out.println(analyzer.getOutput());
}
public static class NewRatioVerifier {
static WhiteBox wb = WhiteBox.getWhiteBox();
public static void main(String args[]) {
if (args.length != 1) {
throw new IllegalArgumentException("Expected 1 arg: <expectedRatio>");
}
int expectedRatio = Integer.valueOf(args[0]);
switch (GCTypes.YoungGCType.getYoungGCType()) {
case DefNew:
case ParNew:
verifyDefNewNewRatio(expectedRatio);
break;
case PSNew:
verifyPSNewRatio(expectedRatio);
break;
case G1:
verifyG1NewRatio(expectedRatio);
break;
default:
throw new RuntimeException("Unexpected young GC type");
}
}
/**
* Verify NewSize for DefNew and ParNew collectors.
*
* Compare expected NewSize calculated according to sizing policies used by DefNew
* with NewSize value reported by MemoryPoolMXBeans.
*/
public static void verifyDefNewNewRatio(int expectedRatio) {
long initEden = HeapRegionUsageTool.getEdenUsage().getInit();
long initSurv = HeapRegionUsageTool.getSurvivorUsage().getInit();
long initOld = HeapRegionUsageTool.getOldUsage().getInit();
long newSize = initEden + 2 * initSurv;
long expectedNewSize = HeapRegionUsageTool.alignDown(initOld / expectedRatio,
wb.getHeapSpaceAlignment());
if (expectedNewSize != newSize) {
throw new RuntimeException("Expected young gen size is: " + expectedNewSize
+ ", but observed new size is: " + newSize);
}
}
/**
* Verify NewSize for PS collector.
* Expected NewSize calculated according to alignment policies used by PS
* and then compared with actual NewSize obtained from MemoryPoolMXBeans.
*/
public static void verifyPSNewRatio(int expectedRatio) {
long initEden = HeapRegionUsageTool.getEdenUsage().getInit();
long initSurv = HeapRegionUsageTool.getSurvivorUsage().getInit();
long initOld = HeapRegionUsageTool.getOldUsage().getInit();
long newSize = initEden + 2 * initSurv;
long alignedDownNewSize = HeapRegionUsageTool.alignDown(initOld / expectedRatio,
wb.getHeapSpaceAlignment());
long expectedNewSize = HeapRegionUsageTool.alignUp(alignedDownNewSize,
wb.psVirtualSpaceAlignment());
if (expectedNewSize != newSize) {
throw new RuntimeException("Expected young gen size is: " + expectedNewSize
+ ", but observed new size is: " + newSize);
}
}
/**
* Verify NewSize for G1 GC.
* Amount of young regions calculated according to sizing policies used by G1
* and then compared with actual number of young regions derived from
* values reported by MemoryPoolMXBeans and region size.
*/
public static void verifyG1NewRatio(int expectedRatio) {
long initEden = HeapRegionUsageTool.getEdenUsage().getInit();
long initSurv = HeapRegionUsageTool.getSurvivorUsage().getInit();
long maxOld = HeapRegionUsageTool.getOldUsage().getMax();
int regionSize = wb.g1RegionSize();
int youngListLength = (int) ((initEden + initSurv) / regionSize);
int maxRegions = (int) (maxOld / regionSize);
int expectedYoungListLength = (int) (maxRegions / (double) (expectedRatio + 1));
if (youngListLength != expectedYoungListLength) {
throw new RuntimeException("Expected G1 young list length is: " + expectedYoungListLength
+ ", but observed young list length is: " + youngListLength);
}
}
}
}
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