1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 package gc.g1;

    25 

    26 /*

    27  * @test TestLargePageUseForHeap.java

    28  * @summary Test that Java heap is allocated using large pages of the appropriate size if available.

    29  * @bug 8221517

    30  * @key gc

    31  * @modules java.base/jdk.internal.misc

    32  * @library /test/lib

    33  * @requires vm.gc.G1

    34  * @requires os.family != "solaris"

    35  * @build sun.hotspot.WhiteBox

    36  * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission

    37  * @run main/othervm -Xbootclasspath/a:. -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

    38         -XX:+IgnoreUnrecognizedVMOptions -XX:+UseLargePages gc.g1.TestLargePageUseForHeap

    39  */

    40 

    41 import jdk.test.lib.process.OutputAnalyzer;

    42 import jdk.test.lib.process.ProcessTools;

    43 import jtreg.SkippedException;

    44 import sun.hotspot.WhiteBox;

    45 

    46 public class TestLargePageUseForHeap {

    47     static long largePageSize;

    48     static long smallPageSize;

    49 

    50     static void checkSize(OutputAnalyzer output, long expectedSize, String pattern) {

    51         String pageSizeStr = output.firstMatch(pattern, 1);

    52 

    53         if (pageSizeStr == null) {

    54             output.reportDiagnosticSummary();

    55             throw new RuntimeException("Match from '" + pattern + "' got 'null' expected: " + expectedSize);

    56         }

    57 

    58         long size = parseMemoryString(pageSizeStr);

    59         if (size != expectedSize) {

    60             output.reportDiagnosticSummary();

    61             throw new RuntimeException("Match from '" + pattern + "' got " + size + " expected: " + expectedSize);

    62         }

    63     }

    64 

    65     static boolean checkLargePageEnabled(OutputAnalyzer output) {

    66         // This message is printed when tried to reserve a memory with large page but it failed.

    67         String errorStr = "Reserve regular memory without large pages";

    68         String heapPattern = ".*Heap: ";

    69         // If errorStr is printed just before heap page log, reservation for Java Heap is failed.

    70         String result = output.firstMatch(errorStr + "\n" + heapPattern);

    71         if (result != null) {

    72             return false;

    73         }

    74         return true;

    75     }

    76 

    77     static void checkHeap(OutputAnalyzer output, long expectedPageSize) throws Exception {

    78         checkSize(output, expectedPageSize, "Heap: .*page_size=([^ ]+)");

    79     }

    80 

    81     static void testVM(long regionSize) throws Exception {

    82         ProcessBuilder pb;

    83         // Test with large page enabled.

    84         pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",

    85                                                    "-XX:G1HeapRegionSize=" + regionSize,

    86                                                    "-Xmx128m",

    87                                                    "-Xlog:pagesize,gc+heap+coops=debug",

    88                                                    "-XX:+UseLargePages",

    89                                                    "-version");

    90 

    91         OutputAnalyzer output = new OutputAnalyzer(pb.start());

    92         boolean largePageEnabled = checkLargePageEnabled(output);

    93         checkHeap(output, largePageEnabled ? largePageSize : smallPageSize);

    94         output.shouldHaveExitValue(0);

    95 

    96         // Test with large page disabled.

    97         pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",

    98                                                    "-XX:G1HeapRegionSize=" + regionSize,

    99                                                    "-Xmx128m",

   100                                                    "-Xlog:pagesize,gc+heap+coops=debug",

   101                                                    "-XX:-UseLargePages",

   102                                                    "-version");

   103 

   104         output = new OutputAnalyzer(pb.start());

   105         checkHeap(output, smallPageSize);

   106         output.shouldHaveExitValue(0);

   107     }

   108 

   109     public static void main(String[] args) throws Exception {

   110         WhiteBox wb = WhiteBox.getWhiteBox();

   111         smallPageSize = wb.getVMPageSize();

   112         largePageSize = wb.getVMLargePageSize();

   113 

   114         if (largePageSize == 0) {

   115             throw new SkippedException("Large page support does not seem to be available on this platform.");

   116         }

   117         if (largePageSize == smallPageSize) {

   118             throw new SkippedException("Large page support does not seem to be available on this platform."

   119                     + "Small and large page size are the same.");

   120         }

   121 

   122         // G1HeapRegionSize=1MB

   123         testVM(1 * 1024 * 1024);

   124 

   125         // G1HeapRegionSize=2MB

   126         testVM(2 * 1024 * 1024);

   127 

   128         // G1HeapRegionSize=8MB

   129         testVM(8 * 1024 * 1024);

   130     }

   131 

   132     public static long parseMemoryString(String value) {

   133         long multiplier = 1;

   134 

   135         if (value.endsWith("B")) {

   136             multiplier = 1;

   137         } else if (value.endsWith("K")) {

   138             multiplier = 1024;

   139         } else if (value.endsWith("M")) {

   140             multiplier = 1024 * 1024;

   141         } else if (value.endsWith("G")) {

   142             multiplier = 1024 * 1024 * 1024;

   143         } else {

   144             throw new IllegalArgumentException("Expected memory string '" + value + "'to end with either of: B, K, M, G");

   145         }

   146 

   147         long longValue = Long.parseUnsignedLong(value.substring(0, value.length() - 1));

   148 

   149         return longValue * multiplier;

   150     }

   151 }

   152