jdk8-mips64-public/hotspot: test/runtime/SharedArchiveFile/CdsSameObjectAlignment.java@740e263c80c6 (annotated)

test/runtime/SharedArchiveFile/CdsSameObjectAlignment.java@740e263c80c6 (annotated)

test/runtime/SharedArchiveFile/CdsSameObjectAlignment.java

Thu, 15 Aug 2013 20:04:10 -0400

author: hseigel
date: Thu, 15 Aug 2013 20:04:10 -0400
changeset 5528: 740e263c80c6
parent 5257: 1e9094165098
child 5625: 35b99e7e0af2
permissions: -rw-r--r--

8003424: Enable Class Data Sharing for CompressedOops
8016729: ObjectAlignmentInBytes=16 now forces the use of heap based compressed oops
8005933: The -Xshare:auto option is ignored for -server
Summary: Move klass metaspace above the heap and support CDS with compressed klass ptrs.
Reviewed-by: coleenp, kvn, mgerdin, tschatzl, stefank

 /*
  * 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.
  */
 /*
  * @test CdsSameObjectAlignment
  * @summary Testing CDS (class data sharing) using varying object alignment.
  *          Using same object alignment for each dump/load pair
  * @library /testlibrary
  */
 import com.oracle.java.testlibrary.*;
 public class CdsSameObjectAlignment {
     public static void main(String[] args) throws Exception {
         String nativeWordSize = System.getProperty("sun.arch.data.model");
         if (!Platform.is64bit()) {
             System.out.println("ObjectAlignmentInBytes for CDS is only " +
                 "supported on 64bit platforms; this plaform is " +
                 nativeWordSize);
             System.out.println("Skipping the test");
         } else {
             dumpAndLoadSharedArchive(8);
             dumpAndLoadSharedArchive(16);
             dumpAndLoadSharedArchive(32);
             dumpAndLoadSharedArchive(64);
         }
     }
     private static void
     dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {
         String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="
             + objectAlignmentInBytes;
         System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "
             + objectAlignmentInBytes);
         // create shared archive
         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
             "-XX:+UnlockDiagnosticVMOptions",
             "-XX:SharedArchiveFile=./sample.jsa",
             "-Xshare:dump",
             objectAlignmentArg);
         OutputAnalyzer output = new OutputAnalyzer(pb.start());
         output.shouldContain("Loading classes to share");
         output.shouldHaveExitValue(0);
         // run using the shared archive
         pb = ProcessTools.createJavaProcessBuilder(
             "-XX:+UnlockDiagnosticVMOptions",
             "-XX:SharedArchiveFile=./sample.jsa",
             "-Xshare:on",
             objectAlignmentArg,
             "-version");
         output = new OutputAnalyzer(pb.start());
         try {
             output.shouldContain("sharing");
             output.shouldHaveExitValue(0);
         } catch (RuntimeException e) {
             // CDS uses absolute addresses for performance.
             // It will try to reserve memory at a specific address;
             // there is a chance such reservation will fail
             // If it does, it is NOT considered a failure of the feature,
             // rather a possible expected outcome, though not likely
             output.shouldContain("Could not allocate metaspace at a compatible address");
             output.shouldHaveExitValue(1);
         }
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/runtime/SharedArchiveFile/CdsSameObjectAlignment.java@740e263c80c6 (annotated)

test/runtime/SharedArchiveFile/CdsSameObjectAlignment.java