66 lines
2.6 KiB
C++
66 lines
2.6 KiB
C++
/*
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* Copyright (c) 2001, 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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*/
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#include "precompiled.hpp"
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#include "gc/g1/g1Analytics.hpp"
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#include "gc/g1/g1CollectorPolicy.hpp"
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#include "gc/g1/g1YoungGenSizer.hpp"
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#include "gc/g1/heapRegion.hpp"
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#include "gc/g1/heapRegionRemSet.hpp"
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#include "gc/shared/gcPolicyCounters.hpp"
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#include "runtime/globals.hpp"
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#include "utilities/debug.hpp"
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G1CollectorPolicy::G1CollectorPolicy() {
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// Set up the region size and associated fields. Given that the
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// policy is created before the heap, we have to set this up here,
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// so it's done as soon as possible.
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// It would have been natural to pass initial_heap_byte_size() and
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// max_heap_byte_size() to setup_heap_region_size() but those have
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// not been set up at this point since they should be aligned with
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// the region size. So, there is a circular dependency here. We base
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// the region size on the heap size, but the heap size should be
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// aligned with the region size. To get around this we use the
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// unaligned values for the heap.
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HeapRegion::setup_heap_region_size(InitialHeapSize, MaxHeapSize);
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HeapRegionRemSet::setup_remset_size();
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}
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void G1CollectorPolicy::initialize_alignments() {
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_space_alignment = HeapRegion::GrainBytes;
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size_t card_table_alignment = CardTableRS::ct_max_alignment_constraint();
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size_t page_size = UseLargePages ? os::large_page_size() : os::vm_page_size();
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_heap_alignment = MAX3(card_table_alignment, _space_alignment, page_size);
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}
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size_t G1CollectorPolicy::heap_reserved_size_bytes() const {
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return _max_heap_byte_size;
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}
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bool G1CollectorPolicy::is_heterogeneous_heap() const {
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return false;
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}
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