8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
Reviewed-by: pliden, stefank, eosterlund, ehelin, sjohanss, rbackman, coleenp, ihse, jgeorge, lmesnik, rkennke
Contributed-by: per.liden@oracle.com, stefan.karlsson@oracle.com, erik.osterlund@oracle.com, mikael.gerdin@oracle.com, kim.barrett@oracle.com, nils.eliasson@oracle.com, rickard.backman@oracle.com, rwestrel@redhat.com, coleen.phillimore@oracle.com, robbin.ehn@oracle.com, gerard.ziemski@oracle.com, hugh.wilkinson@intel.com, sandhya.viswanathan@intel.com, bill.npo.wheeler@intel.com, vinay.k.awasthi@intel.com, yasuenag@gmail.com
/*
* Copyright (c) 2014, 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
* @bug 8031323
* @summary Verify that objects promoted from eden space to survivor space after
* minor GC are aligned to SurvivorAlignmentInBytes.
* @requires vm.gc != "Z"
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
* -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
* -XX:SurvivorAlignmentInBytes=32 -XX:OldSize=128m
* -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
* TestPromotionToSurvivor 10m 9 SURVIVOR
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
* -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
* -XX:SurvivorAlignmentInBytes=32 -XX:OldSize=128m
* -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
* TestPromotionToSurvivor 20m 47 SURVIVOR
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
* -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
* -XX:SurvivorAlignmentInBytes=64 -XX:OldSize=128m
* -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
* TestPromotionToSurvivor 8m 9 SURVIVOR
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
* -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
* -XX:SurvivorAlignmentInBytes=64 -XX:OldSize=128m
* -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
* TestPromotionToSurvivor 20m 87 SURVIVOR
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI -XX:NewSize=256m -XX:MaxNewSize=256m
* -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
* -XX:SurvivorAlignmentInBytes=128 -XX:OldSize=128m
* -XX:MaxHeapSize=384m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
* TestPromotionToSurvivor 10m 9 SURVIVOR
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
* -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
* -XX:SurvivorAlignmentInBytes=128 -XX:OldSize=128m
* -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
* TestPromotionToSurvivor 20m 147 SURVIVOR
*/
public class TestPromotionToSurvivor {
public static void main(String args[]) {
SurvivorAlignmentTestMain test
= SurvivorAlignmentTestMain.fromArgs(args);
System.out.println(test);
long expectedUsage = test.getExpectedMemoryUsage();
test.baselineMemoryAllocation();
SurvivorAlignmentTestMain.WHITE_BOX.fullGC();
test.allocate();
SurvivorAlignmentTestMain.WHITE_BOX.youngGC();
test.verifyMemoryUsage(expectedUsage);
}
}