author | pliden |
Wed, 20 Nov 2019 10:37:46 +0100 | |
changeset 59150 | 82b2ba888190 |
parent 58787 | 32d39d9525f9 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#include "precompiled.hpp" |
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#include "gc/z/zAddressSpaceLimit.hpp" |
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#include "gc/z/zArguments.hpp" |
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#include "gc/z/zCollectedHeap.hpp" |
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#include "gc/z/zHeuristics.hpp" |
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#include "gc/shared/gcArguments.hpp" |
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#include "runtime/globals.hpp" |
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#include "runtime/globals_extension.hpp" |
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void ZArguments::initialize_alignments() { |
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SpaceAlignment = ZGranuleSize; |
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HeapAlignment = SpaceAlignment; |
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} |
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void ZArguments::initialize() { |
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GCArguments::initialize(); |
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// Check mark stack size |
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const size_t mark_stack_space_limit = ZAddressSpaceLimit::mark_stack(); |
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if (ZMarkStackSpaceLimit > mark_stack_space_limit) { |
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if (!FLAG_IS_DEFAULT(ZMarkStackSpaceLimit)) { |
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vm_exit_during_initialization("ZMarkStackSpaceLimit too large for limited address space"); |
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} |
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FLAG_SET_DEFAULT(ZMarkStackSpaceLimit, mark_stack_space_limit); |
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} |
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// Enable NUMA by default |
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if (FLAG_IS_DEFAULT(UseNUMA)) { |
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FLAG_SET_DEFAULT(UseNUMA, true); |
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} |
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// Disable biased locking by default |
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if (FLAG_IS_DEFAULT(UseBiasedLocking)) { |
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FLAG_SET_DEFAULT(UseBiasedLocking, false); |
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} |
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// Select number of parallel threads |
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if (FLAG_IS_DEFAULT(ParallelGCThreads)) { |
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FLAG_SET_DEFAULT(ParallelGCThreads, ZHeuristics::nparallel_workers()); |
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} |
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if (ParallelGCThreads == 0) { |
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vm_exit_during_initialization("The flag -XX:+UseZGC can not be combined with -XX:ParallelGCThreads=0"); |
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} |
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// Select number of concurrent threads |
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if (FLAG_IS_DEFAULT(ConcGCThreads)) { |
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FLAG_SET_DEFAULT(ConcGCThreads, ZHeuristics::nconcurrent_workers()); |
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} |
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if (ConcGCThreads == 0) { |
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vm_exit_during_initialization("The flag -XX:+UseZGC can not be combined with -XX:ConcGCThreads=0"); |
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} |
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#ifdef COMPILER2 |
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// Enable loop strip mining by default |
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if (FLAG_IS_DEFAULT(UseCountedLoopSafepoints)) { |
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FLAG_SET_DEFAULT(UseCountedLoopSafepoints, true); |
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if (FLAG_IS_DEFAULT(LoopStripMiningIter)) { |
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FLAG_SET_DEFAULT(LoopStripMiningIter, 1000); |
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} |
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} |
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#endif |
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// CompressedOops/UseCompressedClassPointers not supported |
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FLAG_SET_DEFAULT(UseCompressedOops, false); |
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FLAG_SET_DEFAULT(UseCompressedClassPointers, false); |
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// Verification before startup and after exit not (yet) supported |
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FLAG_SET_DEFAULT(VerifyDuringStartup, false); |
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FLAG_SET_DEFAULT(VerifyBeforeExit, false); |
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// Verification before heap iteration not (yet) supported, for the |
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// same reason we need fixup_partial_loads |
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FLAG_SET_DEFAULT(VerifyBeforeIteration, false); |
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if (VerifyBeforeGC || VerifyDuringGC || VerifyAfterGC) { |
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FLAG_SET_DEFAULT(ZVerifyRoots, true); |
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FLAG_SET_DEFAULT(ZVerifyObjects, true); |
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} |
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// Verification of stacks not (yet) supported, for the same reason |
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// we need fixup_partial_loads |
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DEBUG_ONLY(FLAG_SET_DEFAULT(VerifyStack, false)); |
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// Initialize platform specific arguments |
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initialize_platform(); |
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} |
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size_t ZArguments::conservative_max_heap_alignment() { |
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return 0; |
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} |
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CollectedHeap* ZArguments::create_heap() { |
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return new ZCollectedHeap(); |
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} |