Mercurial > hg > graal-jvmci-8
comparison src/share/vm/services/mallocTracker.cpp @ 20360:833b0f92429a
8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill
author | zgu |
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date | Wed, 27 Aug 2014 08:19:12 -0400 |
parents | |
children | 1ff288f0dae4 |
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20359:4d3a43351904 | 20360:833b0f92429a |
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1 /* | |
2 * Copyright (c) 2014, 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 #include "precompiled.hpp" | |
25 | |
26 #include "runtime/atomic.hpp" | |
27 #include "runtime/atomic.inline.hpp" | |
28 #include "services/mallocSiteTable.hpp" | |
29 #include "services/mallocTracker.hpp" | |
30 #include "services/mallocTracker.inline.hpp" | |
31 #include "services/memTracker.hpp" | |
32 | |
33 size_t MallocMemorySummary::_snapshot[CALC_OBJ_SIZE_IN_TYPE(MallocMemorySnapshot, size_t)]; | |
34 | |
35 // Total malloc'd memory amount | |
36 size_t MallocMemorySnapshot::total() const { | |
37 size_t amount = 0; | |
38 for (int index = 0; index < mt_number_of_types; index ++) { | |
39 amount += _malloc[index].malloc_size(); | |
40 } | |
41 amount += _tracking_header.size() + total_arena(); | |
42 return amount; | |
43 } | |
44 | |
45 // Total malloc'd memory used by arenas | |
46 size_t MallocMemorySnapshot::total_arena() const { | |
47 size_t amount = 0; | |
48 for (int index = 0; index < mt_number_of_types; index ++) { | |
49 amount += _malloc[index].arena_size(); | |
50 } | |
51 return amount; | |
52 } | |
53 | |
54 | |
55 void MallocMemorySnapshot::reset() { | |
56 _tracking_header.reset(); | |
57 for (int index = 0; index < mt_number_of_types; index ++) { | |
58 _malloc[index].reset(); | |
59 } | |
60 } | |
61 | |
62 // Make adjustment by subtracting chunks used by arenas | |
63 // from total chunks to get total free chunck size | |
64 void MallocMemorySnapshot::make_adjustment() { | |
65 size_t arena_size = total_arena(); | |
66 int chunk_idx = NMTUtil::flag_to_index(mtChunk); | |
67 _malloc[chunk_idx].record_free(arena_size); | |
68 } | |
69 | |
70 | |
71 void MallocMemorySummary::initialize() { | |
72 assert(sizeof(_snapshot) >= sizeof(MallocMemorySnapshot), "Sanity Check"); | |
73 // Uses placement new operator to initialize static area. | |
74 ::new ((void*)_snapshot)MallocMemorySnapshot(); | |
75 } | |
76 | |
77 void MallocHeader::release() const { | |
78 // Tracking already shutdown, no housekeeping is needed anymore | |
79 if (MemTracker::tracking_level() <= NMT_minimal) return; | |
80 | |
81 MallocMemorySummary::record_free(size(), flags()); | |
82 MallocMemorySummary::record_free_malloc_header(sizeof(MallocHeader)); | |
83 if (tracking_level() == NMT_detail) { | |
84 MallocSiteTable::deallocation_at(size(), _bucket_idx, _pos_idx); | |
85 } | |
86 } | |
87 | |
88 bool MallocHeader::record_malloc_site(const NativeCallStack& stack, size_t size, | |
89 size_t* bucket_idx, size_t* pos_idx) const { | |
90 bool ret = MallocSiteTable::allocation_at(stack, size, bucket_idx, pos_idx); | |
91 | |
92 // Something went wrong, could be OOM or overflow malloc site table. | |
93 // We want to keep tracking data under OOM circumstance, so transition to | |
94 // summary tracking. | |
95 if (!ret) { | |
96 MemTracker::transition_to(NMT_summary); | |
97 } | |
98 return ret; | |
99 } | |
100 | |
101 bool MallocHeader::get_stack(NativeCallStack& stack) const { | |
102 return MallocSiteTable::access_stack(stack, _bucket_idx, _pos_idx); | |
103 } | |
104 | |
105 bool MallocTracker::initialize(NMT_TrackingLevel level) { | |
106 if (level >= NMT_summary) { | |
107 MallocMemorySummary::initialize(); | |
108 } | |
109 | |
110 if (level == NMT_detail) { | |
111 return MallocSiteTable::initialize(); | |
112 } | |
113 return true; | |
114 } | |
115 | |
116 bool MallocTracker::transition(NMT_TrackingLevel from, NMT_TrackingLevel to) { | |
117 assert(from != NMT_off, "Can not transition from off state"); | |
118 assert(to != NMT_off, "Can not transition to off state"); | |
119 if (from == NMT_minimal) { | |
120 MallocMemorySummary::reset(); | |
121 } | |
122 | |
123 if (to == NMT_detail) { | |
124 assert(from == NMT_minimal || from == NMT_summary, "Just check"); | |
125 return MallocSiteTable::initialize(); | |
126 } else if (from == NMT_detail) { | |
127 assert(to == NMT_minimal || to == NMT_summary, "Just check"); | |
128 MallocSiteTable::shutdown(); | |
129 } | |
130 return true; | |
131 } | |
132 | |
133 // Record a malloc memory allocation | |
134 void* MallocTracker::record_malloc(void* malloc_base, size_t size, MEMFLAGS flags, | |
135 const NativeCallStack& stack, NMT_TrackingLevel level) { | |
136 void* memblock; // the address for user data | |
137 MallocHeader* header = NULL; | |
138 | |
139 if (malloc_base == NULL) { | |
140 return NULL; | |
141 } | |
142 | |
143 // Check malloc size, size has to <= MAX_MALLOC_SIZE. This is only possible on 32-bit | |
144 // systems, when malloc size >= 1GB, but is is safe to assume it won't happen. | |
145 if (size > MAX_MALLOC_SIZE) { | |
146 fatal("Should not use malloc for big memory block, use virtual memory instead"); | |
147 } | |
148 // Uses placement global new operator to initialize malloc header | |
149 switch(level) { | |
150 case NMT_off: | |
151 return malloc_base; | |
152 case NMT_minimal: { | |
153 MallocHeader* hdr = ::new (malloc_base) MallocHeader(); | |
154 break; | |
155 } | |
156 case NMT_summary: { | |
157 header = ::new (malloc_base) MallocHeader(size, flags); | |
158 break; | |
159 } | |
160 case NMT_detail: { | |
161 header = ::new (malloc_base) MallocHeader(size, flags, stack); | |
162 break; | |
163 } | |
164 default: | |
165 ShouldNotReachHere(); | |
166 } | |
167 memblock = (void*)((char*)malloc_base + sizeof(MallocHeader)); | |
168 | |
169 // The alignment check: 8 bytes alignment for 32 bit systems. | |
170 // 16 bytes alignment for 64-bit systems. | |
171 assert(((size_t)memblock & (sizeof(size_t) * 2 - 1)) == 0, "Alignment check"); | |
172 | |
173 // Sanity check | |
174 assert(get_memory_tracking_level(memblock) == level, | |
175 "Wrong tracking level"); | |
176 | |
177 #ifdef ASSERT | |
178 if (level > NMT_minimal) { | |
179 // Read back | |
180 assert(get_size(memblock) == size, "Wrong size"); | |
181 assert(get_flags(memblock) == flags, "Wrong flags"); | |
182 } | |
183 #endif | |
184 | |
185 return memblock; | |
186 } | |
187 | |
188 void* MallocTracker::record_free(void* memblock) { | |
189 // Never turned on | |
190 if (MemTracker::tracking_level() == NMT_off || | |
191 memblock == NULL) { | |
192 return memblock; | |
193 } | |
194 MallocHeader* header = malloc_header(memblock); | |
195 header->release(); | |
196 | |
197 return (void*)header; | |
198 } | |
199 | |
200 |