[GR-38414] [GR-44546] MemoryPoolMXBean improvements for serial and epsilon GC.

substratevm/CHANGELOG.md

@@ -22,6 +22,7 @@ This changelog summarizes major changes to GraalVM Native Image.
 * (GR-44216) Native Image is now shipped as part of the GraalVM JDK and thus no longer needs to be installed via `gu install native-image`.
 * (GR-44105) A warning is displayed when trying to generate debug info on macOS since that is not supported. It is now an error to use `-H:+StripDebugInfo` on macOS or `-H:-StripDebugInfo` on Windows since those values are not supported.
 * (GR-43966) Remove analysis options -H:AnalysisStatisticsFile and -H:ImageBuildStatisticsFile. Output files are now written to fixed subdirectories relative to image location (reports/image_build_statistics.json). 
+* (GR-38414) BellSoft implemented the `MemoryPoolMXBean` for the serial and epsilon GCs.
 * (GR-40641) Dynamic linking of AWT libraries on Linux.
 
 ## Version 22.3.0

substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/AbstractCollectionPolicy.java

@@ -26,7 +26,6 @@
 
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import com.oracle.svm.core.heap.GCCause;
 import org.graalvm.compiler.api.replacements.Fold;
 import org.graalvm.compiler.nodes.PauseNode;
 import org.graalvm.nativeimage.Platform;
@@ -36,6 +35,7 @@
 
 import com.oracle.svm.core.SubstrateGCOptions;
 import com.oracle.svm.core.Uninterruptible;
+import com.oracle.svm.core.heap.GCCause;
 import com.oracle.svm.core.heap.PhysicalMemory;
 import com.oracle.svm.core.heap.ReferenceAccess;
 import com.oracle.svm.core.jdk.UninterruptibleUtils;
@@ -193,13 +193,21 @@ private void updateSizeParametersLocked(SizeParameters params, SizeParameters pr
          * but we must still ensure that computations can handle it (for example, no overflows).
          */
         survivorSize = UnsignedUtils.min(survivorSize, params.maxSurvivorSize());
-        edenSize = UnsignedUtils.min(edenSize, maxEdenSize());
+        edenSize = UnsignedUtils.min(edenSize, getMaximumEdenSize());
         oldSize = UnsignedUtils.min(oldSize, params.maxOldSize());
         promoSize = UnsignedUtils.min(promoSize, params.maxOldSize());
     }
 
+    @Override
+    public UnsignedWord getInitialEdenSize() {
+        guaranteeSizeParametersInitialized();
+        return sizes.initialEdenSize;
+    }
+
+    @Override
     @Uninterruptible(reason = "Called from uninterruptible code.", mayBeInlined = true)
-    protected UnsignedWord maxEdenSize() {
+    public UnsignedWord getMaximumEdenSize() {
+        guaranteeSizeParametersInitialized();
         return alignDown(sizes.maxYoungSize.subtract(survivorSize.multiply(2)));
     }
 
@@ -215,6 +223,18 @@ public UnsignedWord getMaximumYoungGenerationSize() {
         return sizes.maxYoungSize;
     }
 
+    @Override
+    public UnsignedWord getInitialSurvivorSize() {
+        guaranteeSizeParametersInitialized();
+        return sizes.initialSurvivorSize;
+    }
+
+    @Override
+    public UnsignedWord getMaximumSurvivorSize() {
+        guaranteeSizeParametersInitialized();
+        return sizes.maxSurvivorSize();
+    }
+
     @Override
     public UnsignedWord getCurrentHeapCapacity() {
         assert VMOperation.isGCInProgress() : "use only during GC";
@@ -236,6 +256,18 @@ public UnsignedWord getYoungGenerationCapacity() {
         return edenSize.add(survivorSize);
     }
 
+    @Override
+    public UnsignedWord getInitialOldSize() {
+        guaranteeSizeParametersInitialized();
+        return sizes.initialOldSize();
+    }
+
+    @Override
+    public UnsignedWord getMaximumOldSize() {
+        guaranteeSizeParametersInitialized();
+        return sizes.maxOldSize();
+    }
+
     @Override
     public UnsignedWord getOldGenerationCapacity() {
         guaranteeSizeParametersInitialized();

substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/AbstractMemoryPoolMXBean.java

@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2023, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2023, BELLSOFT. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+package com.oracle.svm.core.genscavenge;
+
+import java.lang.management.ManagementFactory;
+import java.lang.management.MemoryPoolMXBean;
+import java.lang.management.MemoryType;
+import java.lang.management.MemoryUsage;
+import java.util.Arrays;
+
+import javax.management.ObjectName;
+
+import org.graalvm.nativeimage.Platform;
+import org.graalvm.nativeimage.Platforms;
+import org.graalvm.word.UnsignedWord;
+import org.graalvm.word.WordFactory;
+
+import com.oracle.svm.core.heap.AbstractMXBean;
+import com.oracle.svm.core.jdk.UninterruptibleUtils;
+
+import sun.management.Util;
+
+public abstract class AbstractMemoryPoolMXBean extends AbstractMXBean implements MemoryPoolMXBean {
+
+    private final String name;
+    private final String[] managerNames;
+    protected final UninterruptibleUtils.AtomicUnsigned peakUsage = new UninterruptibleUtils.AtomicUnsigned();
+
+    private static final UnsignedWord UNDEFINED = WordFactory.zero();
+    protected UnsignedWord initialValue = UNDEFINED;
+
+    @Platforms(Platform.HOSTED_ONLY.class)
+    protected AbstractMemoryPoolMXBean(String name, String... managerNames) {
+        this.name = name;
+        this.managerNames = managerNames;
+    }
+
+    UnsignedWord getInitialValue() {
+        if (initialValue.equal(UNDEFINED)) {
+            initialValue = computeInitialValue();
+        }
+        return initialValue;
+    }
+
+    abstract UnsignedWord computeInitialValue();
+
+    abstract UnsignedWord getMaximumValue();
+
+    abstract void afterCollection(GCAccounting accounting);
+
+    MemoryUsage memoryUsage(UnsignedWord usedAndCommitted) {
+        return new MemoryUsage(getInitialValue().rawValue(), usedAndCommitted.rawValue(), usedAndCommitted.rawValue(), getMaximumValue().rawValue());
+    }
+
+    MemoryUsage memoryUsage(UnsignedWord used, UnsignedWord committed) {
+        return new MemoryUsage(getInitialValue().rawValue(), used.rawValue(), committed.rawValue(), getMaximumValue().rawValue());
+    }
+
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public String[] getMemoryManagerNames() {
+        return Arrays.copyOf(managerNames, managerNames.length);
+    }
+
+    @Override
+    public ObjectName getObjectName() {
+        return Util.newObjectName(ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE + ",name=" + name);
+    }
+
+    @Override
+    public MemoryType getType() {
+        return MemoryType.HEAP;
+    }
+
+    @Override
+    public boolean isValid() {
+        return true;
+    }
+
+    @Override
+    public boolean isUsageThresholdSupported() {
+        return false;
+    }
+
+    @Override
+    public long getUsageThreshold() {
+        throw new UnsupportedOperationException("Usage threshold is not supported");
+    }
+
+    @Override
+    public void setUsageThreshold(long l) {
+        throw new UnsupportedOperationException("Usage threshold is not supported");
+    }
+
+    @Override
+    public boolean isUsageThresholdExceeded() {
+        throw new UnsupportedOperationException("Usage threshold is not supported");
+    }
+
+    @Override
+    public long getUsageThresholdCount() {
+        throw new UnsupportedOperationException("Usage threshold is not supported");
+    }
+
+    @Override
+    public boolean isCollectionUsageThresholdSupported() {
+        return false;
+    }
+
+    @Override
+    public long getCollectionUsageThreshold() {
+        throw new UnsupportedOperationException("Collection usage threshold is not supported");
+    }
+
+    @Override
+    public void setCollectionUsageThreshold(long l) {
+        throw new UnsupportedOperationException("Collection usage threshold is not supported");
+    }
+
+    @Override
+    public boolean isCollectionUsageThresholdExceeded() {
+        throw new UnsupportedOperationException("Collection usage threshold is not supported");
+    }
+
+    @Override
+    public long getCollectionUsageThresholdCount() {
+        throw new UnsupportedOperationException("Collection usage threshold is not supported");
+    }
+
+    @Override
+    public void resetPeakUsage() {
+        peakUsage.set(WordFactory.zero());
+    }
+
+    void updatePeakUsage(UnsignedWord value) {
+        UnsignedWord current;
+        do {
+            current = peakUsage.get();
+        } while (value.aboveThan(current) && !peakUsage.compareAndSet(current, value));
+    }
+}

substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/AdaptiveCollectionPolicy.java

@@ -270,7 +270,7 @@ protected void computeEdenSpaceSize(@SuppressWarnings("unused") boolean complete
         assert isAligned(desiredEdenSize);
         desiredEdenSize = minSpaceSize(desiredEdenSize);
 
-        UnsignedWord edenLimit = maxEdenSize();
+        UnsignedWord edenLimit = getMaximumEdenSize();
         if (desiredEdenSize.aboveThan(edenLimit)) {
             /*
              * If the policy says to get a larger eden but is hitting the limit, don't decrease

substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/BasicCollectionPolicies.java

@@ -87,6 +87,16 @@ public void updateSizeParameters() {
             // Size parameters are recomputed from current values whenever they are queried
         }
 
+        @Override
+        public UnsignedWord getInitialEdenSize() {
+            return UNDEFINED;
+        }
+
+        @Override
+        public UnsignedWord getMaximumEdenSize() {
+            return getMaximumYoungGenerationSize();
+        }
+
         @Override
         public final UnsignedWord getMaximumHeapSize() {
             long runtimeValue = SubstrateGCOptions.MaxHeapSize.getValue();
@@ -146,6 +156,16 @@ public final UnsignedWord getMinimumHeapSize() {
             return result;
         }
 
+        @Override
+        public UnsignedWord getInitialSurvivorSize() {
+            return UNDEFINED;
+        }
+
+        @Override
+        public UnsignedWord getMaximumSurvivorSize() {
+            return WordFactory.zero();
+        }
+
         @Override
         public UnsignedWord getSurvivorSpacesCapacity() {
             return WordFactory.zero();
@@ -156,6 +176,11 @@ public UnsignedWord getYoungGenerationCapacity() {
             return getMaximumYoungGenerationSize();
         }
 
+        @Override
+        public UnsignedWord getInitialOldSize() {
+            return UNDEFINED;
+        }
+
         @Override
         public UnsignedWord getOldGenerationCapacity() {
             UnsignedWord heapCapacity = getCurrentHeapCapacity();
@@ -166,6 +191,11 @@ public UnsignedWord getOldGenerationCapacity() {
             return heapCapacity.subtract(youngCapacity);
         }
 
+        @Override
+        public UnsignedWord getMaximumOldSize() {
+            return getOldGenerationCapacity();
+        }
+
         @Override
         public final UnsignedWord getMaximumFreeAlignedChunksSize() {
             return getMaximumYoungGenerationSize();

substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/CollectionPolicy.java

@@ -27,6 +27,7 @@
 import org.graalvm.nativeimage.Platform;
 import org.graalvm.nativeimage.Platforms;
 import org.graalvm.word.UnsignedWord;
+import org.graalvm.word.WordFactory;
 
 import com.oracle.svm.core.SubstrateOptions;
 import com.oracle.svm.core.heap.GCCause;
@@ -36,6 +37,8 @@
 
 /** The interface for a garbage collection policy. All sizes are in bytes. */
 public interface CollectionPolicy {
+    UnsignedWord UNDEFINED = WordFactory.unsigned(-1);
+
     @Platforms(Platform.HOSTED_ONLY.class)
     static String getInitialPolicyName() {
         if (SubstrateOptions.UseEpsilonGC.getValue()) {
@@ -143,6 +146,11 @@ static boolean shouldCollectYoungGenSeparately(boolean defaultValue) {
      */
     UnsignedWord getCurrentHeapCapacity();
 
+    /** May be {@link #UNDEFINED}. */
+    UnsignedWord getInitialEdenSize();
+
+    UnsignedWord getMaximumEdenSize();
+
     /**
      * The hard limit for the size of the entire heap. Exceeding this limit triggers an
      * {@link OutOfMemoryError}.
@@ -158,6 +166,11 @@ static boolean shouldCollectYoungGenSeparately(boolean defaultValue) {
     /** The minimum heap size, for inclusion in diagnostic output. */
     UnsignedWord getMinimumHeapSize();
 
+    /** May be {@link #UNDEFINED}. */
+    UnsignedWord getInitialSurvivorSize();
+
+    UnsignedWord getMaximumSurvivorSize();
+
     /**
      * The total capacity of all survivor-from spaces of all ages, equal to the size of all
      * survivor-to spaces of all ages. In other words, when copying during a collection, up to 2x
@@ -168,9 +181,14 @@ static boolean shouldCollectYoungGenSeparately(boolean defaultValue) {
     /** The capacity of the young generation, comprising the eden and survivor spaces. */
     UnsignedWord getYoungGenerationCapacity();
 
+    /** May be {@link #UNDEFINED}. */
+    UnsignedWord getInitialOldSize();
+
     /** The capacity of the old generation. */
     UnsignedWord getOldGenerationCapacity();
 
+    UnsignedWord getMaximumOldSize();
+
     /**
      * The maximum number of bytes that should be kept readily available for allocation or copying
      * during collections.
@@ -189,5 +207,4 @@ static boolean shouldCollectYoungGenSeparately(boolean defaultValue) {
 
     /** Called before the end of a collection, in the safepoint operation. */
     void onCollectionEnd(boolean completeCollection, GCCause cause);
-
 }