1 /*
2 * Copyright (c) 2015, 2019, 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 */
134
135 log_info(gc, init)("Address Space Type: %s/%s/%s",
136 (contiguous ? "Contiguous" : "Discontiguous"),
137 (limit == ZAddressOffsetMax ? "Unrestricted" : "Restricted"),
138 (reserved == size ? "Complete" : "Degraded"));
139 log_info(gc, init)("Address Space Size: " SIZE_FORMAT "M x " SIZE_FORMAT " = " SIZE_FORMAT "M",
140 reserved / M, ZHeapViews, (reserved * ZHeapViews) / M);
141
142 return reserved >= max_capacity;
143 }
144
145 void ZVirtualMemoryManager::nmt_reserve(uintptr_t start, size_t size) {
146 MemTracker::record_virtual_memory_reserve((void*)start, size, CALLER_PC);
147 MemTracker::record_virtual_memory_type((void*)start, mtJavaHeap);
148 }
149
150 bool ZVirtualMemoryManager::is_initialized() const {
151 return _initialized;
152 }
153
154 ZVirtualMemory ZVirtualMemoryManager::alloc(size_t size, bool alloc_from_front) {
155 uintptr_t start;
156
157 if (alloc_from_front || size <= ZPageSizeSmall) {
158 // Small page
159 start = _manager.alloc_from_front(size);
160 } else {
161 // Medium/Large page
162 start = _manager.alloc_from_back(size);
163 }
164
165 return ZVirtualMemory(start, size);
166 }
167
168 void ZVirtualMemoryManager::free(const ZVirtualMemory& vmem) {
169 _manager.free(vmem.start(), vmem.size());
170 }
|
1 /*
2 * Copyright (c) 2015, 2020, 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 */
134
135 log_info(gc, init)("Address Space Type: %s/%s/%s",
136 (contiguous ? "Contiguous" : "Discontiguous"),
137 (limit == ZAddressOffsetMax ? "Unrestricted" : "Restricted"),
138 (reserved == size ? "Complete" : "Degraded"));
139 log_info(gc, init)("Address Space Size: " SIZE_FORMAT "M x " SIZE_FORMAT " = " SIZE_FORMAT "M",
140 reserved / M, ZHeapViews, (reserved * ZHeapViews) / M);
141
142 return reserved >= max_capacity;
143 }
144
145 void ZVirtualMemoryManager::nmt_reserve(uintptr_t start, size_t size) {
146 MemTracker::record_virtual_memory_reserve((void*)start, size, CALLER_PC);
147 MemTracker::record_virtual_memory_type((void*)start, mtJavaHeap);
148 }
149
150 bool ZVirtualMemoryManager::is_initialized() const {
151 return _initialized;
152 }
153
154 ZVirtualMemory ZVirtualMemoryManager::alloc(size_t size, bool force_low_address) {
155 uintptr_t start;
156
157 // Small pages are allocated at low addresses, while medium/large pages
158 // are allocated at high addresses (unless forced to be at a low address).
159 if (force_low_address || size <= ZPageSizeSmall) {
160 start = _manager.alloc_from_front(size);
161 } else {
162 start = _manager.alloc_from_back(size);
163 }
164
165 return ZVirtualMemory(start, size);
166 }
167
168 void ZVirtualMemoryManager::free(const ZVirtualMemory& vmem) {
169 _manager.free(vmem.start(), vmem.size());
170 }
|