jdk8-mips64-public/hotspot: test/gc/arguments/TestMaxHeapSizeTools.java@bb416ee2a79b

     1 /*

     2 * Copyright (c) 2013, 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 */

    24 import java.util.regex.Matcher;

    25 import java.util.regex.Pattern;

    26 import java.util.ArrayList;

    27 import java.util.Arrays;

    29 import com.oracle.java.testlibrary.*;

    30 import sun.hotspot.WhiteBox;

    32 class ErgoArgsPrinter {

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

    34     WhiteBox wb = WhiteBox.getWhiteBox();

    35     wb.printHeapSizes();

    36   }

    37 }

    39 final class MinInitialMaxValues {

    40   public long minHeapSize;

    41   public long initialHeapSize;

    42   public long maxHeapSize;

    44   public long minAlignment;

    45   public long maxAlignment;

    46 }

    48 class TestMaxHeapSizeTools {

    50   public static void checkMinInitialMaxHeapFlags(String gcflag) throws Exception {

    51     checkInvalidMinInitialHeapCombinations(gcflag);

    52     checkValidMinInitialHeapCombinations(gcflag);

    53     checkInvalidInitialMaxHeapCombinations(gcflag);

    54     checkValidInitialMaxHeapCombinations(gcflag);

    55   }

    57   public static void checkMinInitialErgonomics(String gcflag) throws Exception {

    58     // heap sizing ergonomics use the value NewSize + OldSize as default values

    59     // for ergonomics calculation. Retrieve these values.

    60     long[] values = new long[2];

    61     getNewOldSize(gcflag, values);

    63     // we check cases with values smaller and larger than this default value.

    64     long newPlusOldSize = values[0] + values[1];

    65     long smallValue = newPlusOldSize / 2;

    66     long largeValue = newPlusOldSize * 2;

    68     // -Xms is not set

    69     checkErgonomics(new String[] { gcflag, "-Xmx16M" }, values, -1, -1);

    70     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);

    71     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);

    72     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-XX:InitialHeapSize=0" }, values, -1, -1);

    74     // -Xms is set to zero

    75     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0" }, values, -1, -1);

    76     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);

    77     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=" + largeValue }, values, -1, largeValue);

    78     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms0", "-XX:InitialHeapSize=0" }, values, -1, -1);

    80     // -Xms is set to small value

    81     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue }, values, -1, -1);

    82     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);

    83     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=" + largeValue }, values, smallValue, largeValue);

    84     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + smallValue, "-XX:InitialHeapSize=0" }, values, smallValue, -1);

    86     // -Xms is set to large value

    87     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue }, values, largeValue, largeValue);

    88     // the next case has already been checked elsewhere and gives an error

    89     // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + smallValue }, values, smallValue, smallValue);

    90     // the next case has already been checked elsewhere too

    91     // checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=" + largeValue }, values, values[0], largeValue);

    92     checkErgonomics(new String[] { gcflag, "-Xmx16M", "-Xms" + largeValue, "-XX:InitialHeapSize=0" }, values, largeValue, -1);

    93   }

    95   private static long align_up(long value, long alignment) {

    96     long alignmentMinusOne = alignment - 1;

    97     return (value + alignmentMinusOne) & ~alignmentMinusOne;

    98   }

   100   private static void getNewOldSize(String gcflag, long[] values) throws Exception {

   101     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(gcflag,

   102       "-XX:+PrintFlagsFinal", "-version");

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

   104     output.shouldHaveExitValue(0);

   106     String stdout = output.getStdout();

   107     values[0] = getFlagValue(" NewSize", stdout);

   108     values[1] = getFlagValue(" OldSize", stdout);

   109   }

   111   public static void checkGenMaxHeapErgo(String gcflag) throws Exception {

   112     TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 3);

   113     TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 4);

   114     TestMaxHeapSizeTools.checkGenMaxHeapSize(gcflag, 5);

   115   }

   117   private static void checkInvalidMinInitialHeapCombinations(String gcflag) throws Exception {

   118     expectError(new String[] { gcflag, "-Xms8M", "-XX:InitialHeapSize=4M", "-version" });

   119   }

   121   private static void checkValidMinInitialHeapCombinations(String gcflag) throws Exception {

   122     expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms4M", "-version" });

   123     expectValid(new String[] { gcflag, "-Xms4M", "-XX:InitialHeapSize=8M", "-version" });

   124     expectValid(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-Xms8M", "-version" });

   125     // the following is not an error as -Xms sets both minimal and initial heap size

   126     expectValid(new String[] { gcflag, "-XX:InitialHeapSize=4M", "-Xms8M", "-version" });

   127   }

   129   private static void checkInvalidInitialMaxHeapCombinations(String gcflag) throws Exception {

   130     expectError(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=8M", "-version" });

   131     expectError(new String[] { gcflag, "-XX:InitialHeapSize=8M", "-XX:MaxHeapSize=4M", "-version" });

   132   }

   134   private static void checkValidInitialMaxHeapCombinations(String gcflag) throws Exception {

   135     expectValid(new String[] { gcflag, "-XX:InitialHeapSize=4M", "-XX:MaxHeapSize=8M", "-version" });

   136     expectValid(new String[] { gcflag, "-XX:MaxHeapSize=8M", "-XX:InitialHeapSize=4M", "-version" });

   137     expectValid(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=4M", "-version" });

   138     // a value of "0" for initial heap size means auto-detect

   139     expectValid(new String[] { gcflag, "-XX:MaxHeapSize=4M", "-XX:InitialHeapSize=0M", "-version" });

   140   }

   142   private static long valueAfter(String source, String match) {

   143     int start = source.indexOf(match) + match.length();

   144     String tail = source.substring(start).split(" ")[0];

   145     return Long.parseLong(tail);

   146   }

   148   /**

   149    * Executes a new VM process with the given class and parameters.

   150    * @param vmargs Arguments to the VM to run

   151    * @param classname Name of the class to run

   152    * @param arguments Arguments to the class

   153    * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string

   154    * @return The OutputAnalyzer with the results for the invocation.

   155    */

   156   public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception {

   157     ArrayList<String> finalargs = new ArrayList<String>();

   159     String[] whiteboxOpts = new String[] {

   160       "-Xbootclasspath/a:.",

   161       "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",

   162       "-cp", System.getProperty("java.class.path"),

   163     };

   165     if (useTestDotJavaDotOpts) {

   166       // System.getProperty("test.java.opts") is '' if no options is set,

   167       // we need to skip such a result

   168       String[] externalVMOpts = new String[0];

   169       if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) {

   170         externalVMOpts = System.getProperty("test.java.opts").split(" ");

   171       }

   172       finalargs.addAll(Arrays.asList(externalVMOpts));

   173     }

   175     finalargs.addAll(Arrays.asList(vmargs));

   176     finalargs.addAll(Arrays.asList(whiteboxOpts));

   177     finalargs.add(classname);

   178     finalargs.addAll(Arrays.asList(arguments));

   180     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));

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

   182     output.shouldHaveExitValue(0);

   184     return output;

   185   }

   187   private static void getMinInitialMaxHeap(String[] args, MinInitialMaxValues val) throws Exception {

   188     OutputAnalyzer output = runWhiteBoxTest(args, ErgoArgsPrinter.class.getName(), new String[] {}, false);

   190     // the output we watch for has the following format:

   191     //

   192     // "Minimum heap X Initial heap Y Maximum heap Z Min alignment A Max Alignment B"

   193     //

   194     // where A, B, X, Y and Z are sizes in bytes.

   195     // Unfortunately there is no other way to retrieve the minimum heap size and

   196     // the alignments.

   198     Matcher m = Pattern.compile("Minimum heap \\d+ Initial heap \\d+ Maximum heap \\d+ Min alignment \\d+ Max alignment \\d+").

   199       matcher(output.getStdout());

   200     if (!m.find()) {

   201       throw new RuntimeException("Could not find heap size string.");

   202     }

   204     String match = m.group();

   206     // actual values

   207     val.minHeapSize = valueAfter(match, "Minimum heap ");

   208     val.initialHeapSize = valueAfter(match, "Initial heap ");

   209     val.maxHeapSize = valueAfter(match, "Maximum heap ");

   210     val.minAlignment = valueAfter(match, "Min alignment ");

   211     val.maxAlignment = valueAfter(match, "Max alignment ");

   212   }

   214   /**

   215    * Verify whether the VM automatically synchronizes minimum and initial heap size if only

   216    * one is given for the GC specified.

   217    */

   218   public static void checkErgonomics(String[] args, long[] newoldsize,

   219     long expectedMin, long expectedInitial) throws Exception {

   221     MinInitialMaxValues v = new MinInitialMaxValues();

   222     getMinInitialMaxHeap(args, v);

   224     if ((expectedMin != -1) && (align_up(expectedMin, v.minAlignment) != v.minHeapSize)) {

   225       throw new RuntimeException("Actual minimum heap size of " + v.minHeapSize +

   226         " differs from expected minimum heap size of " + expectedMin);

   227     }

   229     if ((expectedInitial != -1) && (align_up(expectedInitial, v.minAlignment) != v.initialHeapSize)) {

   230       throw new RuntimeException("Actual initial heap size of " + v.initialHeapSize +

   231         " differs from expected initial heap size of " + expectedInitial);

   232     }

   234     // always check the invariant min <= initial <= max heap size

   235     if (!(v.minHeapSize <= v.initialHeapSize && v.initialHeapSize <= v.maxHeapSize)) {

   236       throw new RuntimeException("Inconsistent min/initial/max heap sizes, they are " +

   237         v.minHeapSize + "/" + v.initialHeapSize + "/" + v.maxHeapSize);

   238     }

   239   }

   241   /**

   242    * Verify whether the VM respects the given maximum heap size in MB for the

   243    * GC specified.

   244    * @param gcflag The garbage collector to test as command line flag. E.g. -XX:+UseG1GC

   245    * @param maxHeapSize the maximum heap size to verify, in MB.

   246    */

   247   public static void checkGenMaxHeapSize(String gcflag, long maxHeapsize) throws Exception {

   248     final long K = 1024;

   250     MinInitialMaxValues v = new MinInitialMaxValues();

   251     getMinInitialMaxHeap(new String[] { gcflag, "-XX:MaxHeapSize=" + maxHeapsize + "M" }, v);

   253     long expectedHeapSize = align_up(maxHeapsize * K * K, v.maxAlignment);

   254     long actualHeapSize = v.maxHeapSize;

   256     if (actualHeapSize > expectedHeapSize) {

   257       throw new RuntimeException("Heap has " + actualHeapSize  +

   258         " bytes, expected to be less than " + expectedHeapSize);

   259     }

   260   }

   262   private static long getFlagValue(String flag, String where) {

   263     Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where);

   264     if (!m.find()) {

   265       throw new RuntimeException("Could not find value for flag " + flag + " in output string");

   266     }

   267     String match = m.group();

   268     return Long.parseLong(match.substring(match.lastIndexOf(" ") + 1, match.length()));

   269   }

   271   private static void shouldContainOrNot(OutputAnalyzer output, boolean contains, String message) throws Exception {

   272     if (contains) {

   273       output.shouldContain(message);

   274     } else {

   275       output.shouldNotContain(message);

   276     }

   277   }

   279   private static void expect(String[] flags, boolean hasWarning, boolean hasError, int errorcode) throws Exception {

   280     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags);

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

   282     shouldContainOrNot(output, hasWarning, "Warning");

   283     shouldContainOrNot(output, hasError, "Error");

   284     output.shouldHaveExitValue(errorcode);

   285   }

   287   private static void expectError(String[] flags) throws Exception {

   288     expect(flags, false, true, 1);

   289   }

   291   private static void expectValid(String[] flags) throws Exception {

   292     expect(flags, false, false, 0);

   293   }

   294 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/gc/arguments/TestMaxHeapSizeTools.java@bb416ee2a79b

test/gc/arguments/TestMaxHeapSizeTools.java