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test/gc/arguments/TestMaxHeapSizeTools.java

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rev 8935 : 8028254: gc/arguments/TestMinInitialErgonomics.java failed with unexpected initial heap size
Reviewed-by: brutisso, tschatzl, sjohanss


  24 import java.util.regex.Matcher;
  25 import java.util.regex.Pattern;
  26 import java.util.ArrayList;
  27 import java.util.Arrays;
  28 
  29 import com.oracle.java.testlibrary.*;
  30 import sun.hotspot.WhiteBox;
  31 
  32 class ErgoArgsPrinter {
  33   public static void main(String[] args) throws Exception {
  34     WhiteBox wb = WhiteBox.getWhiteBox();
  35     wb.printHeapSizes();
  36   }
  37 }
  38 
  39 final class MinInitialMaxValues {
  40   public long minHeapSize;
  41   public long initialHeapSize;
  42   public long maxHeapSize;
  43 
  44   public long minAlignment;
  45   public long maxAlignment;
  46 }
  47 
  48 class TestMaxHeapSizeTools {
  49 
  50   public static void checkMinInitialMaxHeapFlags(String gcflag) throws Exception {
  51     checkInvalidMinInitialHeapCombinations(gcflag);
  52     checkValidMinInitialHeapCombinations(gcflag);
  53     checkInvalidInitialMaxHeapCombinations(gcflag);
  54     checkValidInitialMaxHeapCombinations(gcflag);
  55   }
  56 
  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);
  62 
  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;


 175     finalargs.addAll(Arrays.asList(arguments));
 176 
 177     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
 178     OutputAnalyzer output = new OutputAnalyzer(pb.start());
 179     output.shouldHaveExitValue(0);
 180 
 181     return output;
 182   }
 183 
 184   private static void getMinInitialMaxHeap(String[] args, MinInitialMaxValues val) throws Exception {
 185     OutputAnalyzer output = runWhiteBoxTest(args, ErgoArgsPrinter.class.getName(), new String[] {}, false);
 186 
 187     // the output we watch for has the following format:
 188     //
 189     // "Minimum heap X Initial heap Y Maximum heap Z Min alignment A Max Alignment B"
 190     //
 191     // where A, B, X, Y and Z are sizes in bytes.
 192     // Unfortunately there is no other way to retrieve the minimum heap size and
 193     // the alignments.
 194 
 195     Matcher m = Pattern.compile("Minimum heap \\d+ Initial heap \\d+ Maximum heap \\d+ Min alignment \\d+ Max alignment \\d+").
 196       matcher(output.getStdout());
 197     if (!m.find()) {
 198       throw new RuntimeException("Could not find heap size string.");
 199     }
 200 
 201     String match = m.group();
 202 
 203     // actual values
 204     val.minHeapSize = valueAfter(match, "Minimum heap ");
 205     val.initialHeapSize = valueAfter(match, "Initial heap ");
 206     val.maxHeapSize = valueAfter(match, "Maximum heap ");
 207     val.minAlignment = valueAfter(match, "Min alignment ");
 208     val.maxAlignment = valueAfter(match, "Max alignment ");
 209   }
 210 
 211   /**
 212    * Verify whether the VM automatically synchronizes minimum and initial heap size if only
 213    * one is given for the GC specified.
 214    */
 215   public static void checkErgonomics(String[] args, long[] newoldsize,
 216     long expectedMin, long expectedInitial) throws Exception {
 217 
 218     MinInitialMaxValues v = new MinInitialMaxValues();
 219     getMinInitialMaxHeap(args, v);
 220 
 221     if ((expectedMin != -1) && (align_up(expectedMin, v.minAlignment) != v.minHeapSize)) {
 222       throw new RuntimeException("Actual minimum heap size of " + v.minHeapSize +
 223         " differs from expected minimum heap size of " + expectedMin);
 224     }
 225 
 226     if ((expectedInitial != -1) && (align_up(expectedInitial, v.minAlignment) != v.initialHeapSize)) {
 227       throw new RuntimeException("Actual initial heap size of " + v.initialHeapSize +
 228         " differs from expected initial heap size of " + expectedInitial);
 229     }
 230 
 231     // always check the invariant min <= initial <= max heap size
 232     if (!(v.minHeapSize <= v.initialHeapSize && v.initialHeapSize <= v.maxHeapSize)) {
 233       throw new RuntimeException("Inconsistent min/initial/max heap sizes, they are " +
 234         v.minHeapSize + "/" + v.initialHeapSize + "/" + v.maxHeapSize);
 235     }
 236   }
 237 
 238   /**
 239    * Verify whether the VM respects the given maximum heap size in MB for the
 240    * GC specified.
 241    * @param gcflag The garbage collector to test as command line flag. E.g. -XX:+UseG1GC
 242    * @param maxHeapSize the maximum heap size to verify, in MB.
 243    */
 244   public static void checkGenMaxHeapSize(String gcflag, long maxHeapsize) throws Exception {
 245     final long K = 1024;
 246 
 247     MinInitialMaxValues v = new MinInitialMaxValues();
 248     getMinInitialMaxHeap(new String[] { gcflag, "-XX:MaxHeapSize=" + maxHeapsize + "M" }, v);
 249 
 250     long expectedHeapSize = align_up(maxHeapsize * K * K, v.maxAlignment);
 251     long actualHeapSize = v.maxHeapSize;
 252 
 253     if (actualHeapSize > expectedHeapSize) {
 254       throw new RuntimeException("Heap has " + actualHeapSize  +
 255         " bytes, expected to be less than " + expectedHeapSize);
 256     }
 257   }
 258 
 259   private static long getFlagValue(String flag, String where) {
 260     Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where);
 261     if (!m.find()) {
 262       throw new RuntimeException("Could not find value for flag " + flag + " in output string");
 263     }
 264     String match = m.group();
 265     return Long.parseLong(match.substring(match.lastIndexOf(" ") + 1, match.length()));
 266   }
 267 
 268   private static void shouldContainOrNot(OutputAnalyzer output, boolean contains, String message) throws Exception {
 269     if (contains) {
 270       output.shouldContain(message);




  24 import java.util.regex.Matcher;
  25 import java.util.regex.Pattern;
  26 import java.util.ArrayList;
  27 import java.util.Arrays;
  28 
  29 import com.oracle.java.testlibrary.*;
  30 import sun.hotspot.WhiteBox;
  31 
  32 class ErgoArgsPrinter {
  33   public static void main(String[] args) throws Exception {
  34     WhiteBox wb = WhiteBox.getWhiteBox();
  35     wb.printHeapSizes();
  36   }
  37 }
  38 
  39 final class MinInitialMaxValues {
  40   public long minHeapSize;
  41   public long initialHeapSize;
  42   public long maxHeapSize;
  43 
  44   public long spaceAlignment;
  45   public long heapAlignment;
  46 }
  47 
  48 class TestMaxHeapSizeTools {
  49 
  50   public static void checkMinInitialMaxHeapFlags(String gcflag) throws Exception {
  51     checkInvalidMinInitialHeapCombinations(gcflag);
  52     checkValidMinInitialHeapCombinations(gcflag);
  53     checkInvalidInitialMaxHeapCombinations(gcflag);
  54     checkValidInitialMaxHeapCombinations(gcflag);
  55   }
  56 
  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);
  62 
  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;


 175     finalargs.addAll(Arrays.asList(arguments));
 176 
 177     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
 178     OutputAnalyzer output = new OutputAnalyzer(pb.start());
 179     output.shouldHaveExitValue(0);
 180 
 181     return output;
 182   }
 183 
 184   private static void getMinInitialMaxHeap(String[] args, MinInitialMaxValues val) throws Exception {
 185     OutputAnalyzer output = runWhiteBoxTest(args, ErgoArgsPrinter.class.getName(), new String[] {}, false);
 186 
 187     // the output we watch for has the following format:
 188     //
 189     // "Minimum heap X Initial heap Y Maximum heap Z Min alignment A Max Alignment B"
 190     //
 191     // where A, B, X, Y and Z are sizes in bytes.
 192     // Unfortunately there is no other way to retrieve the minimum heap size and
 193     // the alignments.
 194 
 195     Matcher m = Pattern.compile("Minimum heap \\d+ Initial heap \\d+ Maximum heap \\d+ Space alignment \\d+ Heap alignment \\d+").
 196       matcher(output.getStdout());
 197     if (!m.find()) {
 198       throw new RuntimeException("Could not find heap size string.");
 199     }
 200 
 201     String match = m.group();
 202 
 203     // actual values
 204     val.minHeapSize = valueAfter(match, "Minimum heap ");
 205     val.initialHeapSize = valueAfter(match, "Initial heap ");
 206     val.maxHeapSize = valueAfter(match, "Maximum heap ");
 207     val.spaceAlignment = valueAfter(match, "Space alignment ");
 208     val.heapAlignment = valueAfter(match, "Heap alignment ");
 209   }
 210 
 211   /**
 212    * Verify whether the VM automatically synchronizes minimum and initial heap size if only
 213    * one is given for the GC specified.
 214    */
 215   public static void checkErgonomics(String[] args, long[] newoldsize,
 216     long expectedMin, long expectedInitial) throws Exception {
 217 
 218     MinInitialMaxValues v = new MinInitialMaxValues();
 219     getMinInitialMaxHeap(args, v);
 220 
 221     if ((expectedMin != -1) && (align_up(expectedMin, v.heapAlignment) != v.minHeapSize)) {
 222       throw new RuntimeException("Actual minimum heap size of " + v.minHeapSize +
 223         " differs from expected minimum heap size of " + expectedMin);
 224     }
 225 
 226     if ((expectedInitial != -1) && (align_up(expectedInitial, v.heapAlignment) != v.initialHeapSize)) {
 227       throw new RuntimeException("Actual initial heap size of " + v.initialHeapSize +
 228         " differs from expected initial heap size of " + expectedInitial);
 229     }
 230 
 231     // always check the invariant min <= initial <= max heap size
 232     if (!(v.minHeapSize <= v.initialHeapSize && v.initialHeapSize <= v.maxHeapSize)) {
 233       throw new RuntimeException("Inconsistent min/initial/max heap sizes, they are " +
 234         v.minHeapSize + "/" + v.initialHeapSize + "/" + v.maxHeapSize);
 235     }
 236   }
 237 
 238   /**
 239    * Verify whether the VM respects the given maximum heap size in MB for the
 240    * GC specified.
 241    * @param gcflag The garbage collector to test as command line flag. E.g. -XX:+UseG1GC
 242    * @param maxHeapSize the maximum heap size to verify, in MB.
 243    */
 244   public static void checkGenMaxHeapSize(String gcflag, long maxHeapsize) throws Exception {
 245     final long K = 1024;
 246 
 247     MinInitialMaxValues v = new MinInitialMaxValues();
 248     getMinInitialMaxHeap(new String[] { gcflag, "-XX:MaxHeapSize=" + maxHeapsize + "M" }, v);
 249 
 250     long expectedHeapSize = align_up(maxHeapsize * K * K, v.heapAlignment);
 251     long actualHeapSize = v.maxHeapSize;
 252 
 253     if (actualHeapSize > expectedHeapSize) {
 254       throw new RuntimeException("Heap has " + actualHeapSize  +
 255         " bytes, expected to be less than " + expectedHeapSize);
 256     }
 257   }
 258 
 259   private static long getFlagValue(String flag, String where) {
 260     Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where);
 261     if (!m.find()) {
 262       throw new RuntimeException("Could not find value for flag " + flag + " in output string");
 263     }
 264     String match = m.group();
 265     return Long.parseLong(match.substring(match.lastIndexOf(" ") + 1, match.length()));
 266   }
 267 
 268   private static void shouldContainOrNot(OutputAnalyzer output, boolean contains, String message) throws Exception {
 269     if (contains) {
 270       output.shouldContain(message);


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