d46d9318c1
Before scanning the heap for roots into the collection set, merge them into a single remembered set (card table) and do work distribution based on location like other collectors do. Reviewed-by: kbarrett, lkorinth
59 lines
2.6 KiB
C++
59 lines
2.6 KiB
C++
/*
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* Copyright (c) 2018, 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/g1CollectedHeap.hpp"
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#include "gc/g1/g1HeterogeneousHeapPolicy.hpp"
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#include "gc/g1/g1Policy.hpp"
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#include "gc/g1/heterogeneousHeapRegionManager.hpp"
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G1HeterogeneousHeapPolicy::G1HeterogeneousHeapPolicy(STWGCTimer* gc_timer) :
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G1Policy(gc_timer), _manager(NULL) {}
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// We call the super class init(), after which we provision young_list_target_length() regions in dram.
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void G1HeterogeneousHeapPolicy::init(G1CollectedHeap* g1h, G1CollectionSet* collection_set) {
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G1Policy::init(g1h, collection_set);
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_manager = HeterogeneousHeapRegionManager::manager();
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_manager->adjust_dram_regions((uint)young_list_target_length(), G1CollectedHeap::heap()->workers());
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}
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// After a collection pause, young list target length is updated. So we need to make sure we have enough regions in dram for young gen.
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void G1HeterogeneousHeapPolicy::record_collection_pause_end(double pause_time_ms, size_t heap_used_bytes_before_gc) {
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G1Policy::record_collection_pause_end(pause_time_ms, heap_used_bytes_before_gc);
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_manager->adjust_dram_regions((uint)young_list_target_length(), G1CollectedHeap::heap()->workers());
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}
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// After a full collection, young list target length is updated. So we need to make sure we have enough regions in dram for young gen.
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void G1HeterogeneousHeapPolicy::record_full_collection_end() {
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G1Policy::record_full_collection_end();
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_manager->adjust_dram_regions((uint)young_list_target_length(), G1CollectedHeap::heap()->workers());
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}
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bool G1HeterogeneousHeapPolicy::force_upgrade_to_full() {
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if (_manager->has_borrowed_regions()) {
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return true;
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}
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return false;
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}
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