Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1RegionToSpaceMapper.cpp @ 20404:227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
Summary: Splitting out a g1 allocator class to simply specialized allocators which can associate each allocation with a given context.
Reviewed-by: mgerdin, brutisso
| author | sjohanss |
|---|---|
| date | Fri, 05 Sep 2014 09:49:19 +0200 |
| parents | 7b2fc3129653 |
| children | e7d0505c8a30 |
| rev | line source |
|---|---|
| 20337 | 1 /* |
| 2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "gc_implementation/g1/g1BiasedArray.hpp" | |
| 27 #include "gc_implementation/g1/g1RegionToSpaceMapper.hpp" | |
|
20339
7b2fc3129653
8055635: Missing include in g1RegionToSpaceMapper.hpp results in unresolved symbol of fastdebug build without precompiled headers
tschatzl
parents:
20337
diff
changeset
|
28 #include "memory/allocation.inline.hpp" |
| 20337 | 29 #include "runtime/virtualspace.hpp" |
| 30 #include "services/memTracker.hpp" | |
| 31 #include "utilities/bitMap.inline.hpp" | |
| 32 | |
| 33 G1RegionToSpaceMapper::G1RegionToSpaceMapper(ReservedSpace rs, | |
| 34 size_t commit_granularity, | |
| 35 size_t region_granularity, | |
| 36 MemoryType type) : | |
| 37 _storage(), | |
| 38 _commit_granularity(commit_granularity), | |
| 39 _region_granularity(region_granularity), | |
| 40 _listener(NULL), | |
| 41 _commit_map() { | |
| 42 guarantee(is_power_of_2(commit_granularity), "must be"); | |
| 43 guarantee(is_power_of_2(region_granularity), "must be"); | |
| 44 _storage.initialize_with_granularity(rs, commit_granularity); | |
| 45 | |
| 46 MemTracker::record_virtual_memory_type((address)rs.base(), type); | |
| 47 } | |
| 48 | |
| 49 // G1RegionToSpaceMapper implementation where the region granularity is larger than | |
| 50 // or the same as the commit granularity. | |
| 51 // Basically, the space corresponding to one region region spans several OS pages. | |
| 52 class G1RegionsLargerThanCommitSizeMapper : public G1RegionToSpaceMapper { | |
| 53 private: | |
| 54 size_t _pages_per_region; | |
| 55 | |
| 56 public: | |
| 57 G1RegionsLargerThanCommitSizeMapper(ReservedSpace rs, | |
| 58 size_t os_commit_granularity, | |
| 59 size_t alloc_granularity, | |
| 60 size_t commit_factor, | |
| 61 MemoryType type) : | |
| 62 G1RegionToSpaceMapper(rs, os_commit_granularity, alloc_granularity, type), | |
| 63 _pages_per_region(alloc_granularity / (os_commit_granularity * commit_factor)) { | |
| 64 | |
| 65 guarantee(alloc_granularity >= os_commit_granularity, "allocation granularity smaller than commit granularity"); | |
| 66 _commit_map.resize(rs.size() * commit_factor / alloc_granularity, /* in_resource_area */ false); | |
| 67 } | |
| 68 | |
| 69 virtual void commit_regions(uintptr_t start_idx, size_t num_regions) { | |
| 70 _storage.commit(start_idx * _pages_per_region, num_regions * _pages_per_region); | |
| 71 _commit_map.set_range(start_idx, start_idx + num_regions); | |
| 72 fire_on_commit(start_idx, num_regions); | |
| 73 } | |
| 74 | |
| 75 virtual void uncommit_regions(uintptr_t start_idx, size_t num_regions) { | |
| 76 _storage.uncommit(start_idx * _pages_per_region, num_regions * _pages_per_region); | |
| 77 _commit_map.clear_range(start_idx, start_idx + num_regions); | |
| 78 } | |
| 79 }; | |
| 80 | |
| 81 // G1RegionToSpaceMapper implementation where the region granularity is smaller | |
| 82 // than the commit granularity. | |
| 83 // Basically, the contents of one OS page span several regions. | |
| 84 class G1RegionsSmallerThanCommitSizeMapper : public G1RegionToSpaceMapper { | |
| 85 private: | |
| 86 class CommitRefcountArray : public G1BiasedMappedArray<uint> { | |
| 87 protected: | |
| 88 virtual uint default_value() const { return 0; } | |
| 89 }; | |
| 90 | |
| 91 size_t _regions_per_page; | |
| 92 | |
| 93 CommitRefcountArray _refcounts; | |
| 94 | |
| 95 uintptr_t region_idx_to_page_idx(uint region) const { | |
| 96 return region / _regions_per_page; | |
| 97 } | |
| 98 | |
| 99 public: | |
| 100 G1RegionsSmallerThanCommitSizeMapper(ReservedSpace rs, | |
| 101 size_t os_commit_granularity, | |
| 102 size_t alloc_granularity, | |
| 103 size_t commit_factor, | |
| 104 MemoryType type) : | |
| 105 G1RegionToSpaceMapper(rs, os_commit_granularity, alloc_granularity, type), | |
| 106 _regions_per_page((os_commit_granularity * commit_factor) / alloc_granularity), _refcounts() { | |
| 107 | |
| 108 guarantee((os_commit_granularity * commit_factor) >= alloc_granularity, "allocation granularity smaller than commit granularity"); | |
| 109 _refcounts.initialize((HeapWord*)rs.base(), (HeapWord*)(rs.base() + rs.size()), os_commit_granularity); | |
| 110 _commit_map.resize(rs.size() * commit_factor / alloc_granularity, /* in_resource_area */ false); | |
| 111 } | |
| 112 | |
| 113 virtual void commit_regions(uintptr_t start_idx, size_t num_regions) { | |
| 114 for (uintptr_t i = start_idx; i < start_idx + num_regions; i++) { | |
| 115 assert(!_commit_map.at(i), err_msg("Trying to commit storage at region "INTPTR_FORMAT" that is already committed", i)); | |
| 116 uintptr_t idx = region_idx_to_page_idx(i); | |
| 117 uint old_refcount = _refcounts.get_by_index(idx); | |
| 118 if (old_refcount == 0) { | |
| 119 _storage.commit(idx, 1); | |
| 120 } | |
| 121 _refcounts.set_by_index(idx, old_refcount + 1); | |
| 122 _commit_map.set_bit(i); | |
| 123 fire_on_commit(i, 1); | |
| 124 } | |
| 125 } | |
| 126 | |
| 127 virtual void uncommit_regions(uintptr_t start_idx, size_t num_regions) { | |
| 128 for (uintptr_t i = start_idx; i < start_idx + num_regions; i++) { | |
| 129 assert(_commit_map.at(i), err_msg("Trying to uncommit storage at region "INTPTR_FORMAT" that is not committed", i)); | |
| 130 uintptr_t idx = region_idx_to_page_idx(i); | |
| 131 uint old_refcount = _refcounts.get_by_index(idx); | |
| 132 assert(old_refcount > 0, "must be"); | |
| 133 if (old_refcount == 1) { | |
| 134 _storage.uncommit(idx, 1); | |
| 135 } | |
| 136 _refcounts.set_by_index(idx, old_refcount - 1); | |
| 137 _commit_map.clear_bit(i); | |
| 138 } | |
| 139 } | |
| 140 }; | |
| 141 | |
| 142 void G1RegionToSpaceMapper::fire_on_commit(uint start_idx, size_t num_regions) { | |
| 143 if (_listener != NULL) { | |
| 144 _listener->on_commit(start_idx, num_regions); | |
| 145 } | |
| 146 } | |
| 147 | |
| 148 G1RegionToSpaceMapper* G1RegionToSpaceMapper::create_mapper(ReservedSpace rs, | |
| 149 size_t os_commit_granularity, | |
| 150 size_t region_granularity, | |
| 151 size_t commit_factor, | |
| 152 MemoryType type) { | |
| 153 | |
| 154 if (region_granularity >= (os_commit_granularity * commit_factor)) { | |
| 155 return new G1RegionsLargerThanCommitSizeMapper(rs, os_commit_granularity, region_granularity, commit_factor, type); | |
| 156 } else { | |
| 157 return new G1RegionsSmallerThanCommitSizeMapper(rs, os_commit_granularity, region_granularity, commit_factor, type); | |
| 158 } | |
| 159 } |