| /* |
| * Copyright (c) 2015, 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. |
| * |
| * 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. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "gc/shared/collectedHeap.hpp" |
| #include "gc/shared/collectorPolicy.hpp" |
| #include "gc/shared/threadLocalAllocBuffer.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/commandLineFlagConstraintsGC.hpp" |
| #include "runtime/commandLineFlagRangeList.hpp" |
| #include "runtime/globals.hpp" |
| #include "runtime/globals_extension.hpp" |
| #include "utilities/defaultStream.hpp" |
| |
| #if INCLUDE_ALL_GCS |
| #include "gc/g1/g1_globals.hpp" |
| #include "gc/g1/heapRegionBounds.inline.hpp" |
| #include "gc/shared/plab.hpp" |
| #endif // INCLUDE_ALL_GCS |
| #ifdef COMPILER1 |
| #include "c1/c1_globals.hpp" |
| #endif // COMPILER1 |
| #ifdef COMPILER2 |
| #include "opto/c2_globals.hpp" |
| #endif // COMPILER2 |
| |
| // Some flags that have default values that indicate that the |
| // JVM should automatically determine an appropriate value |
| // for that flag. In those cases it is only appropriate for the |
| // constraint checking to be done if the user has specified the |
| // value(s) of the flag(s) on the command line. In the constraint |
| // checking functions, FLAG_IS_CMDLINE() is used to check if |
| // the flag has been set by the user and so should be checked. |
| |
| #if INCLUDE_ALL_GCS |
| static Flag::Error ParallelGCThreadsAndCMSWorkQueueDrainThreshold(uint threads, uintx threshold, bool verbose) { |
| // CMSWorkQueueDrainThreshold is verified to be less than max_juint |
| if (UseConcMarkSweepGC && (threads > (uint)(max_jint / (uint)threshold))) { |
| CommandLineError::print(verbose, |
| "ParallelGCThreads (" UINT32_FORMAT ") or CMSWorkQueueDrainThreshold (" |
| UINTX_FORMAT ") is too large\n", |
| threads, threshold); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| return Flag::SUCCESS; |
| } |
| #endif |
| |
| // As ParallelGCThreads differs among GC modes, we need constraint function. |
| Flag::Error ParallelGCThreadsConstraintFunc(uint value, bool verbose) { |
| Flag::Error status = Flag::SUCCESS; |
| |
| #if INCLUDE_ALL_GCS |
| // Parallel GC passes ParallelGCThreads when creating GrowableArray as 'int' type parameter. |
| // So can't exceed with "max_jint" |
| if (UseParallelGC && (value > (uint)max_jint)) { |
| CommandLineError::print(verbose, |
| "ParallelGCThreads (" UINT32_FORMAT ") must be " |
| "less than or equal to " UINT32_FORMAT " for Parallel GC\n", |
| value, max_jint); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| // To avoid overflow at ParScanClosure::do_oop_work. |
| if (UseConcMarkSweepGC && (value > (max_jint / 10))) { |
| CommandLineError::print(verbose, |
| "ParallelGCThreads (" UINT32_FORMAT ") must be " |
| "less than or equal to " UINT32_FORMAT " for CMS GC\n", |
| value, (max_jint / 10)); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| status = ParallelGCThreadsAndCMSWorkQueueDrainThreshold(value, CMSWorkQueueDrainThreshold, verbose); |
| #endif |
| return status; |
| } |
| |
| // As ConcGCThreads should be smaller than ParallelGCThreads, |
| // we need constraint function. |
| Flag::Error ConcGCThreadsConstraintFunc(uint value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| // CMS and G1 GCs use ConcGCThreads. |
| if ((UseConcMarkSweepGC || UseG1GC) && (value > ParallelGCThreads)) { |
| CommandLineError::print(verbose, |
| "ConcGCThreads (" UINT32_FORMAT ") must be " |
| "less than or equal to ParallelGCThreads (" UINT32_FORMAT ")\n", |
| value, ParallelGCThreads); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif |
| return Flag::SUCCESS; |
| } |
| |
| static Flag::Error MinPLABSizeBounds(const char* name, size_t value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| if ((UseConcMarkSweepGC || UseG1GC) && (value < PLAB::min_size())) { |
| CommandLineError::print(verbose, |
| "%s (" SIZE_FORMAT ") must be " |
| "greater than or equal to ergonomic PLAB minimum size (" SIZE_FORMAT ")\n", |
| name, value, PLAB::min_size()); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif // INCLUDE_ALL_GCS |
| return Flag::SUCCESS; |
| } |
| |
| static Flag::Error MaxPLABSizeBounds(const char* name, size_t value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| if ((UseConcMarkSweepGC || UseG1GC) && (value > PLAB::max_size())) { |
| CommandLineError::print(verbose, |
| "%s (" SIZE_FORMAT ") must be " |
| "less than or equal to ergonomic PLAB maximum size (" SIZE_FORMAT ")\n", |
| name, value, PLAB::max_size()); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif // INCLUDE_ALL_GCS |
| return Flag::SUCCESS; |
| } |
| |
| static Flag::Error MinMaxPLABSizeBounds(const char* name, size_t value, bool verbose) { |
| Flag::Error status = MinPLABSizeBounds(name, value, verbose); |
| |
| if (status == Flag::SUCCESS) { |
| return MaxPLABSizeBounds(name, value, verbose); |
| } |
| return status; |
| } |
| |
| Flag::Error YoungPLABSizeConstraintFunc(size_t value, bool verbose) { |
| return MinMaxPLABSizeBounds("YoungPLABSize", value, verbose); |
| } |
| |
| Flag::Error OldPLABSizeConstraintFunc(size_t value, bool verbose) { |
| Flag::Error status = Flag::SUCCESS; |
| |
| #if INCLUDE_ALL_GCS |
| if (UseConcMarkSweepGC) { |
| if (value == 0) { |
| CommandLineError::print(verbose, |
| "OldPLABSize (" SIZE_FORMAT ") must be greater than 0", |
| value); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| // For CMS, OldPLABSize is the number of free blocks of a given size that are used when |
| // replenishing the local per-worker free list caches. |
| // For more details, please refer to Arguments::set_cms_and_parnew_gc_flags(). |
| status = MaxPLABSizeBounds("OldPLABSize", value, verbose); |
| } else { |
| status = MinMaxPLABSizeBounds("OldPLABSize", value, verbose); |
| } |
| #endif |
| return status; |
| } |
| |
| Flag::Error MinHeapFreeRatioConstraintFunc(uintx value, bool verbose) { |
| if (value > MaxHeapFreeRatio) { |
| CommandLineError::print(verbose, |
| "MinHeapFreeRatio (" UINTX_FORMAT ") must be " |
| "less than or equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", |
| value, MaxHeapFreeRatio); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error MaxHeapFreeRatioConstraintFunc(uintx value, bool verbose) { |
| if (value < MinHeapFreeRatio) { |
| CommandLineError::print(verbose, |
| "MaxHeapFreeRatio (" UINTX_FORMAT ") must be " |
| "greater than or equal to MinHeapFreeRatio (" UINTX_FORMAT ")\n", |
| value, MinHeapFreeRatio); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| static Flag::Error CheckMaxHeapSizeAndSoftRefLRUPolicyMSPerMB(size_t maxHeap, intx softRef, bool verbose) { |
| if ((softRef > 0) && ((maxHeap / M) > (max_uintx / softRef))) { |
| CommandLineError::print(verbose, |
| "Desired lifetime of SoftReferences cannot be expressed correctly. " |
| "MaxHeapSize (" SIZE_FORMAT ") or SoftRefLRUPolicyMSPerMB " |
| "(" INTX_FORMAT ") is too large\n", |
| maxHeap, softRef); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error SoftRefLRUPolicyMSPerMBConstraintFunc(intx value, bool verbose) { |
| return CheckMaxHeapSizeAndSoftRefLRUPolicyMSPerMB(MaxHeapSize, value, verbose); |
| } |
| |
| Flag::Error MinMetaspaceFreeRatioConstraintFunc(uintx value, bool verbose) { |
| if (value > MaxMetaspaceFreeRatio) { |
| CommandLineError::print(verbose, |
| "MinMetaspaceFreeRatio (" UINTX_FORMAT ") must be " |
| "less than or equal to MaxMetaspaceFreeRatio (" UINTX_FORMAT ")\n", |
| value, MaxMetaspaceFreeRatio); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error MaxMetaspaceFreeRatioConstraintFunc(uintx value, bool verbose) { |
| if (value < MinMetaspaceFreeRatio) { |
| CommandLineError::print(verbose, |
| "MaxMetaspaceFreeRatio (" UINTX_FORMAT ") must be " |
| "greater than or equal to MinMetaspaceFreeRatio (" UINTX_FORMAT ")\n", |
| value, MinMetaspaceFreeRatio); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error InitialTenuringThresholdConstraintFunc(uintx value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| // InitialTenuringThreshold is only used for ParallelGC. |
| if (UseParallelGC && (value > MaxTenuringThreshold)) { |
| CommandLineError::print(verbose, |
| "InitialTenuringThreshold (" UINTX_FORMAT ") must be " |
| "less than or equal to MaxTenuringThreshold (" UINTX_FORMAT ")\n", |
| value, MaxTenuringThreshold); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error MaxTenuringThresholdConstraintFunc(uintx value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| // As only ParallelGC uses InitialTenuringThreshold, |
| // we don't need to compare InitialTenuringThreshold with MaxTenuringThreshold. |
| if (UseParallelGC && (value < InitialTenuringThreshold)) { |
| CommandLineError::print(verbose, |
| "MaxTenuringThreshold (" UINTX_FORMAT ") must be " |
| "greater than or equal to InitialTenuringThreshold (" UINTX_FORMAT ")\n", |
| value, InitialTenuringThreshold); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif |
| |
| // MaxTenuringThreshold=0 means NeverTenure=false && AlwaysTenure=true |
| if ((value == 0) && (NeverTenure || !AlwaysTenure)) { |
| CommandLineError::print(verbose, |
| "MaxTenuringThreshold (0) should match to NeverTenure=false " |
| "&& AlwaysTenure=true. But we have NeverTenure=%s " |
| "AlwaysTenure=%s\n", |
| NeverTenure ? "true" : "false", |
| AlwaysTenure ? "true" : "false"); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| return Flag::SUCCESS; |
| } |
| |
| #if INCLUDE_ALL_GCS |
| Flag::Error G1RSetRegionEntriesConstraintFunc(intx value, bool verbose) { |
| if (!UseG1GC) return Flag::SUCCESS; |
| |
| // Default value of G1RSetRegionEntries=0 means will be set ergonomically. |
| // Minimum value is 1. |
| if (FLAG_IS_CMDLINE(G1RSetRegionEntries) && (value < 1)) { |
| CommandLineError::print(verbose, |
| "G1RSetRegionEntries (" INTX_FORMAT ") must be " |
| "greater than or equal to 1\n", |
| value); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error G1RSetSparseRegionEntriesConstraintFunc(intx value, bool verbose) { |
| if (!UseG1GC) return Flag::SUCCESS; |
| |
| // Default value of G1RSetSparseRegionEntries=0 means will be set ergonomically. |
| // Minimum value is 1. |
| if (FLAG_IS_CMDLINE(G1RSetSparseRegionEntries) && (value < 1)) { |
| CommandLineError::print(verbose, |
| "G1RSetSparseRegionEntries (" INTX_FORMAT ") must be " |
| "greater than or equal to 1\n", |
| value); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error G1YoungSurvRateNumRegionsSummaryConstraintFunc(intx value, bool verbose) { |
| if (!UseG1GC) return Flag::SUCCESS; |
| |
| if (value > (intx)HeapRegionBounds::target_number()) { |
| CommandLineError::print(verbose, |
| "G1YoungSurvRateNumRegionsSummary (" INTX_FORMAT ") must be " |
| "less than or equal to region count (" SIZE_FORMAT ")\n", |
| value, HeapRegionBounds::target_number()); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error G1HeapRegionSizeConstraintFunc(size_t value, bool verbose) { |
| if (!UseG1GC) return Flag::SUCCESS; |
| |
| // Default value of G1HeapRegionSize=0 means will be set ergonomically. |
| if (FLAG_IS_CMDLINE(G1HeapRegionSize) && (value < HeapRegionBounds::min_size())) { |
| CommandLineError::print(verbose, |
| "G1HeapRegionSize (" SIZE_FORMAT ") must be " |
| "greater than or equal to ergonomic heap region minimum size\n", |
| value); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error G1NewSizePercentConstraintFunc(uintx value, bool verbose) { |
| if (!UseG1GC) return Flag::SUCCESS; |
| |
| if (value > G1MaxNewSizePercent) { |
| CommandLineError::print(verbose, |
| "G1NewSizePercent (" UINTX_FORMAT ") must be " |
| "less than or equal to G1MaxNewSizePercent (" UINTX_FORMAT ")\n", |
| value, G1MaxNewSizePercent); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error G1MaxNewSizePercentConstraintFunc(uintx value, bool verbose) { |
| if (!UseG1GC) return Flag::SUCCESS; |
| |
| if (value < G1NewSizePercent) { |
| CommandLineError::print(verbose, |
| "G1MaxNewSizePercent (" UINTX_FORMAT ") must be " |
| "greater than or equal to G1NewSizePercent (" UINTX_FORMAT ")\n", |
| value, G1NewSizePercent); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| #endif // INCLUDE_ALL_GCS |
| |
| Flag::Error ParGCStridesPerThreadConstraintFunc(uintx value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| if (UseConcMarkSweepGC && (value > ((uintx)max_jint / (uintx)ParallelGCThreads))) { |
| CommandLineError::print(verbose, |
| "ParGCStridesPerThread (" UINTX_FORMAT ") must be " |
| "less than or equal to ergonomic maximum (" UINTX_FORMAT ")\n", |
| value, ((uintx)max_jint / (uintx)ParallelGCThreads)); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error CMSOldPLABMinConstraintFunc(size_t value, bool verbose) { |
| Flag::Error status = Flag::SUCCESS; |
| |
| #if INCLUDE_ALL_GCS |
| if (UseConcMarkSweepGC) { |
| if (value > CMSOldPLABMax) { |
| CommandLineError::print(verbose, |
| "CMSOldPLABMin (" SIZE_FORMAT ") must be " |
| "less than or equal to CMSOldPLABMax (" SIZE_FORMAT ")\n", |
| value, CMSOldPLABMax); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| status = MaxPLABSizeBounds("CMSOldPLABMin", value, verbose); |
| } |
| #endif |
| return status; |
| } |
| |
| Flag::Error CMSOldPLABMaxConstraintFunc(size_t value, bool verbose) { |
| Flag::Error status = Flag::SUCCESS; |
| |
| #if INCLUDE_ALL_GCS |
| if (UseConcMarkSweepGC) { |
| status = MaxPLABSizeBounds("CMSOldPLABMax", value, verbose); |
| } |
| #endif |
| return status; |
| } |
| |
| Flag::Error MarkStackSizeConstraintFunc(size_t value, bool verbose) { |
| if (value > MarkStackSizeMax) { |
| CommandLineError::print(verbose, |
| "MarkStackSize (" SIZE_FORMAT ") must be " |
| "less than or equal to MarkStackSizeMax (" SIZE_FORMAT ")\n", |
| value, MarkStackSizeMax); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error CMSPrecleanDenominatorConstraintFunc(uintx value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| if (UseConcMarkSweepGC && (value <= CMSPrecleanNumerator)) { |
| CommandLineError::print(verbose, |
| "CMSPrecleanDenominator (" UINTX_FORMAT ") must be " |
| "strickly greater than CMSPrecleanNumerator (" UINTX_FORMAT ")\n", |
| value, CMSPrecleanNumerator); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error CMSPrecleanNumeratorConstraintFunc(uintx value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| if (UseConcMarkSweepGC && (value >= CMSPrecleanDenominator)) { |
| CommandLineError::print(verbose, |
| "CMSPrecleanNumerator (" UINTX_FORMAT ") must be " |
| "less than CMSPrecleanDenominator (" UINTX_FORMAT ")\n", |
| value, CMSPrecleanDenominator); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error CMSWorkQueueDrainThresholdConstraintFunc(uintx value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| if (UseConcMarkSweepGC) { |
| return ParallelGCThreadsAndCMSWorkQueueDrainThreshold(ParallelGCThreads, value, verbose); |
| } |
| #endif |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error MaxGCPauseMillisConstraintFunc(uintx value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| if (UseG1GC && FLAG_IS_CMDLINE(MaxGCPauseMillis) && (value >= GCPauseIntervalMillis)) { |
| CommandLineError::print(verbose, |
| "MaxGCPauseMillis (" UINTX_FORMAT ") must be " |
| "less than GCPauseIntervalMillis (" UINTX_FORMAT ")\n", |
| value, GCPauseIntervalMillis); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif |
| |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error GCPauseIntervalMillisConstraintFunc(uintx value, bool verbose) { |
| #if INCLUDE_ALL_GCS |
| if (UseG1GC) { |
| if (FLAG_IS_CMDLINE(GCPauseIntervalMillis)) { |
| if (value < 1) { |
| CommandLineError::print(verbose, |
| "GCPauseIntervalMillis (" UINTX_FORMAT ") must be " |
| "greater than or equal to 1\n", |
| value); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| if (value <= MaxGCPauseMillis) { |
| CommandLineError::print(verbose, |
| "GCPauseIntervalMillis (" UINTX_FORMAT ") must be " |
| "greater than MaxGCPauseMillis (" UINTX_FORMAT ")\n", |
| value, MaxGCPauseMillis); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| } |
| } |
| #endif |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error InitialBootClassLoaderMetaspaceSizeConstraintFunc(size_t value, bool verbose) { |
| size_t aligned_max = (size_t)align_size_down(max_uintx/2, Metaspace::reserve_alignment_words()); |
| if (value > aligned_max) { |
| CommandLineError::print(verbose, |
| "InitialBootClassLoaderMetaspaceSize (" SIZE_FORMAT ") must be " |
| "less than or equal to aligned maximum value (" SIZE_FORMAT ")\n", |
| value, aligned_max); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| return Flag::SUCCESS; |
| } |
| |
| static Flag::Error MaxSizeForHeapAlignment(const char* name, size_t value, bool verbose) { |
| // For G1 GC, we don't know until G1CollectorPolicy is created. |
| size_t heap_alignment; |
| |
| #if INCLUDE_ALL_GCS |
| if (UseG1GC) { |
| heap_alignment = HeapRegionBounds::max_size(); |
| } else |
| #endif |
| { |
| heap_alignment = CollectorPolicy::compute_heap_alignment(); |
| } |
| |
| // Not to overflow 'align_size_up(value, _heap_alignment) used from CollectorPolicy::initialize_flags()'. |
| size_t aligned_max = ((max_uintx - heap_alignment) & ~(heap_alignment-1)); |
| if (value > aligned_max) { |
| CommandLineError::print(verbose, |
| "%s (" SIZE_FORMAT ") must be " |
| "less than or equal to aligned maximum value (" SIZE_FORMAT ")\n", |
| name, value, aligned_max); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error InitialHeapSizeConstraintFunc(size_t value, bool verbose) { |
| return MaxSizeForHeapAlignment("InitialHeapSize", value, verbose); |
| } |
| |
| Flag::Error MaxHeapSizeConstraintFunc(size_t value, bool verbose) { |
| Flag::Error status = MaxSizeForHeapAlignment("MaxHeapSize", value, verbose); |
| |
| if (status == Flag::SUCCESS) { |
| status = CheckMaxHeapSizeAndSoftRefLRUPolicyMSPerMB(value, SoftRefLRUPolicyMSPerMB, verbose); |
| } |
| return status; |
| } |
| |
| Flag::Error NewSizeConstraintFunc(size_t value, bool verbose) { |
| #ifdef _LP64 |
| #if INCLUDE_ALL_GCS |
| // Overflow would happen for uint type variable of YoungGenSizer::_min_desired_young_length |
| // when the value to be assigned exceeds uint range. |
| // i.e. result of '(uint)(NewSize / region size(1~32MB))' |
| // So maximum of NewSize should be 'max_juint * 1M' |
| if (UseG1GC && (value > (max_juint * 1 * M))) { |
| CommandLineError::print(verbose, |
| "NewSize (" SIZE_FORMAT ") must be less than ergonomic maximum value\n", |
| value); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| #endif // INCLUDE_ALL_GCS |
| #endif // _LP64 |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error MinTLABSizeConstraintFunc(size_t value, bool verbose) { |
| // At least, alignment reserve area is needed. |
| if (value < ThreadLocalAllocBuffer::alignment_reserve_in_bytes()) { |
| CommandLineError::print(verbose, |
| "MinTLABSize (" SIZE_FORMAT ") must be " |
| "greater than or equal to reserved area in TLAB (" SIZE_FORMAT ")\n", |
| value, ThreadLocalAllocBuffer::alignment_reserve_in_bytes()); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error TLABSizeConstraintFunc(size_t value, bool verbose) { |
| // Skip for default value of zero which means set ergonomically. |
| if (FLAG_IS_CMDLINE(TLABSize)) { |
| if (value < MinTLABSize) { |
| CommandLineError::print(verbose, |
| "TLABSize (" SIZE_FORMAT ") must be " |
| "greater than or equal to MinTLABSize (" SIZE_FORMAT ")\n", |
| value, MinTLABSize); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| if (value > (ThreadLocalAllocBuffer::max_size() * HeapWordSize)) { |
| CommandLineError::print(verbose, |
| "TLABSize (" SIZE_FORMAT ") must be " |
| "less than or equal to ergonomic TLAB maximum size (" SIZE_FORMAT ")\n", |
| value, (ThreadLocalAllocBuffer::max_size() * HeapWordSize)); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| } |
| return Flag::SUCCESS; |
| } |
| |
| Flag::Error SurvivorRatioConstraintFunc(uintx value, bool verbose) { |
| if (FLAG_IS_CMDLINE(SurvivorRatio) && |
| (value > (MaxHeapSize / Universe::heap()->collector_policy()->space_alignment()))) { |
| CommandLineError::print(verbose, |
| "SurvivorRatio (" UINTX_FORMAT ") must be " |
| "less than or equal to ergonomic SurvivorRatio maximum (" SIZE_FORMAT ")\n", |
| value, |
| (MaxHeapSize / Universe::heap()->collector_policy()->space_alignment())); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error MetaspaceSizeConstraintFunc(size_t value, bool verbose) { |
| if (value > MaxMetaspaceSize) { |
| CommandLineError::print(verbose, |
| "MetaspaceSize (" SIZE_FORMAT ") must be " |
| "less than or equal to MaxMetaspaceSize (" SIZE_FORMAT ")\n", |
| value, MaxMetaspaceSize); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error MaxMetaspaceSizeConstraintFunc(size_t value, bool verbose) { |
| if (value < MetaspaceSize) { |
| CommandLineError::print(verbose, |
| "MaxMetaspaceSize (" SIZE_FORMAT ") must be " |
| "greater than or equal to MetaspaceSize (" SIZE_FORMAT ")\n", |
| value, MaxMetaspaceSize); |
| return Flag::VIOLATES_CONSTRAINT; |
| } else { |
| return Flag::SUCCESS; |
| } |
| } |
| |
| Flag::Error SurvivorAlignmentInBytesConstraintFunc(intx value, bool verbose) { |
| if (value != 0) { |
| if (!is_power_of_2(value)) { |
| CommandLineError::print(verbose, |
| "SurvivorAlignmentInBytes (" INTX_FORMAT ") must be " |
| "power of 2\n", |
| value); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| if (value < ObjectAlignmentInBytes) { |
| CommandLineError::print(verbose, |
| "SurvivorAlignmentInBytes (" INTX_FORMAT ") must be " |
| "greater than or equal to ObjectAlignmentInBytes (" INTX_FORMAT ")\n", |
| value, ObjectAlignmentInBytes); |
| return Flag::VIOLATES_CONSTRAINT; |
| } |
| } |
| return Flag::SUCCESS; |
| } |
