| /* |
| * Copyright (c) 2017, 2018, Red Hat, Inc. 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/epsilon/epsilonArguments.hpp" |
| #include "gc/epsilon/epsilonHeap.hpp" |
| #include "gc/shared/gcArguments.hpp" |
| #include "runtime/globals.hpp" |
| #include "runtime/globals_extension.hpp" |
| #include "runtime/vm_version.hpp" |
| #include "utilities/macros.hpp" |
| |
| size_t EpsilonArguments::conservative_max_heap_alignment() { |
| return UseLargePages ? os::large_page_size() : os::vm_page_size(); |
| } |
| |
| void EpsilonArguments::initialize() { |
| GCArguments::initialize(); |
| |
| assert(UseEpsilonGC, "Sanity"); |
| |
| // Forcefully exit when OOME is detected. Nothing we can do at that point. |
| if (FLAG_IS_DEFAULT(ExitOnOutOfMemoryError)) { |
| FLAG_SET_DEFAULT(ExitOnOutOfMemoryError, true); |
| } |
| |
| if (EpsilonMaxTLABSize < MinTLABSize) { |
| warning("EpsilonMaxTLABSize < MinTLABSize, adjusting it to " SIZE_FORMAT, MinTLABSize); |
| EpsilonMaxTLABSize = MinTLABSize; |
| } |
| |
| if (!EpsilonElasticTLAB && EpsilonElasticTLABDecay) { |
| warning("Disabling EpsilonElasticTLABDecay because EpsilonElasticTLAB is disabled"); |
| FLAG_SET_DEFAULT(EpsilonElasticTLABDecay, false); |
| } |
| |
| #ifdef COMPILER2 |
| // Enable loop strip mining: there are still non-GC safepoints, no need to make it worse |
| if (FLAG_IS_DEFAULT(UseCountedLoopSafepoints)) { |
| FLAG_SET_DEFAULT(UseCountedLoopSafepoints, true); |
| if (FLAG_IS_DEFAULT(LoopStripMiningIter)) { |
| FLAG_SET_DEFAULT(LoopStripMiningIter, 1000); |
| } |
| } |
| #endif |
| } |
| |
| void EpsilonArguments::initialize_alignments() { |
| size_t page_size = UseLargePages ? os::large_page_size() : os::vm_page_size(); |
| size_t align = MAX2((size_t)os::vm_allocation_granularity(), page_size); |
| SpaceAlignment = align; |
| HeapAlignment = align; |
| } |
| |
| CollectedHeap* EpsilonArguments::create_heap() { |
| return new EpsilonHeap(); |
| } |