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...oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/GenScavengeGCOptions.java
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| /* | ||
| * Copyright (c) 2022, 2022, 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. 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 com.oracle.svm.core.SubstrateOptions; | ||
| import org.graalvm.collections.EconomicMap; | ||
| import org.graalvm.compiler.options.Option; | ||
| import org.graalvm.compiler.options.OptionKey; | ||
| import org.graalvm.compiler.options.OptionType; | ||
|
|
||
| import com.oracle.svm.core.heap.Heap; | ||
| import com.oracle.svm.core.option.NotifyGCRuntimeOptionKey; | ||
| import com.oracle.svm.core.option.HostedOptionKey; | ||
| import com.oracle.svm.core.option.RuntimeOptionKey; | ||
| import com.oracle.svm.core.util.InterruptImageBuilding; | ||
| import com.oracle.svm.core.util.UserError; | ||
|
|
||
| /** Common options that can be specified for both the serial and the epsilon GC. */ | ||
| public final class GenScavengeGCOptions { | ||
| @Option(help = "Serial and epsilon GC only: the maximum heap size as percent of physical memory.", type = OptionType.User) // | ||
| public static final RuntimeOptionKey<Integer> MaximumHeapSizePercent = new NotifyGCRuntimeOptionKey<>(80, GenScavengeGCOptions::serialOrEpsilonGCOnly); | ||
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|
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| @Option(help = "Serial and epsilon GC only: the maximum size of the young generation as a percentage of the maximum heap size.", type = OptionType.User) // | ||
| public static final RuntimeOptionKey<Integer> MaximumYoungGenerationSizePercent = new NotifyGCRuntimeOptionKey<>(10, GenScavengeGCOptions::serialOrEpsilonGCOnly); | ||
|
|
||
| @Option(help = "Serial and epsilon GC only: the size of an aligned chunk.", type = OptionType.Expert) // | ||
| public static final HostedOptionKey<Long> AlignedHeapChunkSize = new HostedOptionKey<>(1L * 1024L * 1024L, GenScavengeGCOptions::serialOrEpsilonGCOnly) { | ||
| @Override | ||
| protected void onValueUpdate(EconomicMap<OptionKey<?>, Object> values, Long oldValue, Long newValue) { | ||
| int multiple = 4096; | ||
| UserError.guarantee(newValue > 0 && newValue % multiple == 0, "%s value must be a multiple of %d.", getName(), multiple); | ||
| } | ||
| }; | ||
|
|
||
| /* | ||
| * This should be a fraction of the size of an aligned chunk, else large small arrays will not | ||
| * fit in an aligned chunk. | ||
| */ | ||
| @Option(help = "Serial and epsilon GC only: the size at or above which an array will be allocated in its own unaligned chunk. 0 implies (AlignedHeapChunkSize / 8).", type = OptionType.Expert) // | ||
| public static final HostedOptionKey<Long> LargeArrayThreshold = new HostedOptionKey<>(0L, GenScavengeGCOptions::serialOrEpsilonGCOnly); | ||
|
|
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| @Option(help = "Serial and epsilon GC only: fill unused memory chunks with a sentinel value.", type = OptionType.Debug) // | ||
| public static final HostedOptionKey<Boolean> ZapChunks = new HostedOptionKey<>(false, GenScavengeGCOptions::serialOrEpsilonGCOnly); | ||
|
|
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| @Option(help = "Serial and epsilon GC only: before use, fill memory chunks with a sentinel value.", type = OptionType.Debug) // | ||
| public static final HostedOptionKey<Boolean> ZapProducedHeapChunks = new HostedOptionKey<>(false, GenScavengeGCOptions::serialOrEpsilonGCOnly); | ||
|
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| @Option(help = "Serial and epsilon GC only: after use, Fill memory chunks with a sentinel value.", type = OptionType.Debug) // | ||
| public static final HostedOptionKey<Boolean> ZapConsumedHeapChunks = new HostedOptionKey<>(false, GenScavengeGCOptions::serialOrEpsilonGCOnly); | ||
|
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| @Option(help = "Serial and epsilon GC only: bytes that can be allocated before (re-)querying the physical memory size", type = OptionType.Debug) // | ||
| public static final HostedOptionKey<Long> AllocationBeforePhysicalMemorySize = new HostedOptionKey<>(1L * 1024L * 1024L, GenScavengeGCOptions::serialOrEpsilonGCOnly); | ||
|
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| @Option(help = "Serial and epsilon GC only: number of bytes at the beginning of each heap chunk that are not used for payload data, i.e., can be freely used as metadata by the heap chunk provider.", type = OptionType.Debug) // | ||
| public static final HostedOptionKey<Integer> HeapChunkHeaderPadding = new HostedOptionKey<>(0, GenScavengeGCOptions::serialOrEpsilonGCOnly); | ||
|
|
||
| private GenScavengeGCOptions() { | ||
| } | ||
|
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| private static void serialOrEpsilonGCOnly(OptionKey<?> optionKey) { | ||
| if (!SubstrateOptions.UseSerialGC.getValue() && !SubstrateOptions.UseEpsilonGC.getValue()) { | ||
| throw new InterruptImageBuilding("The option " + optionKey.getName() + " is garbage collector specific and cannot be specified if the " + | ||
| Heap.getHeap().getGC().getName() + " is used at runtime."); | ||
| } | ||
| } | ||
| } |
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