1 /*
2 * Copyright (c) 2015, 2017, 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 #ifndef SHARE_GC_Z_ZPAGE_HPP
25 #define SHARE_GC_Z_ZPAGE_HPP
26
27 #include "gc/z/zForwardingTable.hpp"
28 #include "gc/z/zList.hpp"
29 #include "gc/z/zLiveMap.hpp"
30 #include "gc/z/zPhysicalMemory.hpp"
31 #include "gc/z/zVirtualMemory.hpp"
32 #include "memory/allocation.hpp"
33
34 class ZPage : public CHeapObj<mtGC> {
35 friend class ZList<ZPage>;
36
37 private:
38 // First cacheline (always hot)
39 const uint8_t _type; // Page type
40 volatile uint8_t _pinned; // Pinned flag
41 uint8_t _numa_id; // NUMA node affinity
42 uint32_t _seqnum; // Allocation sequence number
43 const ZVirtualMemory _virtual; // Virtual start/end address
44 volatile uintptr_t _top; // Virtual top address
45 ZLiveMap _livemap; // Live map
46
47 // Second cacheline (hot when relocated and cached)
48 volatile uint32_t _refcount; // Page reference count
49 ZForwardingTable _forwarding; // Forwarding table
50 ZPhysicalMemory _physical; // Physical memory for page
51 ZListNode<ZPage> _node; // Page list node
52
53 const char* type_to_string() const;
54 uint32_t object_max_count() const;
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1 /*
2 * Copyright (c) 2015, 2018, 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 #ifndef SHARE_GC_Z_ZPAGE_HPP
25 #define SHARE_GC_Z_ZPAGE_HPP
26
27 #include "gc/z/zForwardingTable.hpp"
28 #include "gc/z/zList.hpp"
29 #include "gc/z/zLiveMap.hpp"
30 #include "gc/z/zPhysicalMemory.hpp"
31 #include "gc/z/zVirtualMemory.hpp"
32 #include "memory/allocation.hpp"
33
34 class ZPage : public CHeapObj<mtGC> {
35 friend class VMStructs;
36 friend class ZList<ZPage>;
37
38 private:
39 // First cacheline (always hot)
40 const uint8_t _type; // Page type
41 volatile uint8_t _pinned; // Pinned flag
42 uint8_t _numa_id; // NUMA node affinity
43 uint32_t _seqnum; // Allocation sequence number
44 const ZVirtualMemory _virtual; // Virtual start/end address
45 volatile uintptr_t _top; // Virtual top address
46 ZLiveMap _livemap; // Live map
47
48 // Second cacheline (hot when relocated and cached)
49 volatile uint32_t _refcount; // Page reference count
50 ZForwardingTable _forwarding; // Forwarding table
51 ZPhysicalMemory _physical; // Physical memory for page
52 ZListNode<ZPage> _node; // Page list node
53
54 const char* type_to_string() const;
55 uint32_t object_max_count() const;
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