| /* |
| * Copyright (c) 2001, 2016, 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/g1/g1Analytics.hpp" |
| #include "gc/g1/g1CollectorPolicy.hpp" |
| #include "gc/g1/g1YoungGenSizer.hpp" |
| #include "gc/g1/heapRegion.hpp" |
| #include "gc/g1/heapRegionRemSet.hpp" |
| #include "gc/shared/gcPolicyCounters.hpp" |
| #include "runtime/globals.hpp" |
| #include "utilities/debug.hpp" |
| |
| G1CollectorPolicy::G1CollectorPolicy() { |
| |
| // Set up the region size and associated fields. Given that the |
| // policy is created before the heap, we have to set this up here, |
| // so it's done as soon as possible. |
| |
| // It would have been natural to pass initial_heap_byte_size() and |
| // max_heap_byte_size() to setup_heap_region_size() but those have |
| // not been set up at this point since they should be aligned with |
| // the region size. So, there is a circular dependency here. We base |
| // the region size on the heap size, but the heap size should be |
| // aligned with the region size. To get around this we use the |
| // unaligned values for the heap. |
| HeapRegion::setup_heap_region_size(InitialHeapSize, MaxHeapSize); |
| HeapRegionRemSet::setup_remset_size(); |
| } |
| |
| void G1CollectorPolicy::initialize_alignments() { |
| _space_alignment = HeapRegion::GrainBytes; |
| size_t card_table_alignment = CardTableRS::ct_max_alignment_constraint(); |
| size_t page_size = UseLargePages ? os::large_page_size() : os::vm_page_size(); |
| _heap_alignment = MAX3(card_table_alignment, _space_alignment, page_size); |
| } |