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annotate src/share/vm/gc_implementation/shared/mutableNUMASpace.hpp @ 12146:9758d9f36299
8021954: VM SIGSEGV during classloading on MacOS; hs_err_pid file produced
Summary: declare all user-defined operator new()s within Hotspot code with the empty throw() exception specification
Reviewed-by: coleenp, twisti, dholmes, hseigel, dcubed, kvn, ccheung
Contributed-by: lois.foltan@oracle.com
| author | coleenp |
|---|---|
| date | Thu, 29 Aug 2013 18:56:29 -0400 |
| parents | db9981fd3124 |
| children | de6a9e811145 |
| rev | line source |
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| 0 | 1 /* |
| 6008 | 2 * Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_MUTABLENUMASPACE_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MUTABLENUMASPACE_HPP | |
| 27 | |
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28 #include "utilities/macros.hpp" |
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29 #if INCLUDE_ALL_GCS |
| 1972 | 30 #include "gc_implementation/shared/gcUtil.hpp" |
| 31 #include "gc_implementation/shared/mutableSpace.hpp" | |
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32 #endif // INCLUDE_ALL_GCS |
| 1972 | 33 |
| 0 | 34 /* |
| 35 * The NUMA-aware allocator (MutableNUMASpace) is basically a modification | |
| 36 * of MutableSpace which preserves interfaces but implements different | |
| 37 * functionality. The space is split into chunks for each locality group | |
| 38 * (resizing for adaptive size policy is also supported). For each thread | |
| 39 * allocations are performed in the chunk corresponding to the home locality | |
| 40 * group of the thread. Whenever any chunk fills-in the young generation | |
| 41 * collection occurs. | |
| 42 * The chunks can be also be adaptively resized. The idea behind the adaptive | |
| 43 * sizing is to reduce the loss of the space in the eden due to fragmentation. | |
| 44 * The main cause of fragmentation is uneven allocation rates of threads. | |
| 45 * The allocation rate difference between locality groups may be caused either by | |
| 46 * application specifics or by uneven LWP distribution by the OS. Besides, | |
| 47 * application can have less threads then the number of locality groups. | |
| 48 * In order to resize the chunk we measure the allocation rate of the | |
| 49 * application between collections. After that we reshape the chunks to reflect | |
| 50 * the allocation rate pattern. The AdaptiveWeightedAverage exponentially | |
| 51 * decaying average is used to smooth the measurements. The NUMASpaceResizeRate | |
| 52 * parameter is used to control the adaptation speed by restricting the number of | |
| 53 * bytes that can be moved during the adaptation phase. | |
| 54 * Chunks may contain pages from a wrong locality group. The page-scanner has | |
| 55 * been introduced to address the problem. Remote pages typically appear due to | |
| 56 * the memory shortage in the target locality group. Besides Solaris would | |
| 57 * allocate a large page from the remote locality group even if there are small | |
| 58 * local pages available. The page-scanner scans the pages right after the | |
| 59 * collection and frees remote pages in hope that subsequent reallocation would | |
| 60 * be more successful. This approach proved to be useful on systems with high | |
| 61 * load where multiple processes are competing for the memory. | |
| 62 */ | |
| 63 | |
| 64 class MutableNUMASpace : public MutableSpace { | |
| 65 friend class VMStructs; | |
| 66 | |
| 6197 | 67 class LGRPSpace : public CHeapObj<mtGC> { |
| 0 | 68 int _lgrp_id; |
| 69 MutableSpace* _space; | |
| 70 MemRegion _invalid_region; | |
| 71 AdaptiveWeightedAverage *_alloc_rate; | |
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72 bool _allocation_failed; |
| 0 | 73 |
| 74 struct SpaceStats { | |
| 75 size_t _local_space, _remote_space, _unbiased_space, _uncommited_space; | |
| 76 size_t _large_pages, _small_pages; | |
| 77 | |
| 78 SpaceStats() { | |
| 79 _local_space = 0; | |
| 80 _remote_space = 0; | |
| 81 _unbiased_space = 0; | |
| 82 _uncommited_space = 0; | |
| 83 _large_pages = 0; | |
| 84 _small_pages = 0; | |
| 85 } | |
| 86 }; | |
| 87 | |
| 88 SpaceStats _space_stats; | |
| 89 | |
| 90 char* _last_page_scanned; | |
| 91 char* last_page_scanned() { return _last_page_scanned; } | |
| 92 void set_last_page_scanned(char* p) { _last_page_scanned = p; } | |
| 93 public: | |
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94 LGRPSpace(int l, size_t alignment) : _lgrp_id(l), _last_page_scanned(NULL), _allocation_failed(false) { |
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95 _space = new MutableSpace(alignment); |
| 0 | 96 _alloc_rate = new AdaptiveWeightedAverage(NUMAChunkResizeWeight); |
| 97 } | |
| 98 ~LGRPSpace() { | |
| 99 delete _space; | |
| 100 delete _alloc_rate; | |
| 101 } | |
| 102 | |
| 103 void add_invalid_region(MemRegion r) { | |
| 104 if (!_invalid_region.is_empty()) { | |
| 105 _invalid_region.set_start(MIN2(_invalid_region.start(), r.start())); | |
| 106 _invalid_region.set_end(MAX2(_invalid_region.end(), r.end())); | |
| 107 } else { | |
| 108 _invalid_region = r; | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 static bool equals(void* lgrp_id_value, LGRPSpace* p) { | |
| 113 return *(int*)lgrp_id_value == p->lgrp_id(); | |
| 114 } | |
| 115 | |
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116 // Report a failed allocation. |
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117 void set_allocation_failed() { _allocation_failed = true; } |
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118 |
| 0 | 119 void sample() { |
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120 // If there was a failed allocation make allocation rate equal |
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121 // to the size of the whole chunk. This ensures the progress of |
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122 // the adaptation process. |
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123 size_t alloc_rate_sample; |
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124 if (_allocation_failed) { |
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125 alloc_rate_sample = space()->capacity_in_bytes(); |
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126 _allocation_failed = false; |
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127 } else { |
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128 alloc_rate_sample = space()->used_in_bytes(); |
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129 } |
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130 alloc_rate()->sample(alloc_rate_sample); |
| 0 | 131 } |
| 132 | |
| 133 MemRegion invalid_region() const { return _invalid_region; } | |
| 134 void set_invalid_region(MemRegion r) { _invalid_region = r; } | |
| 135 int lgrp_id() const { return _lgrp_id; } | |
| 136 MutableSpace* space() const { return _space; } | |
| 137 AdaptiveWeightedAverage* alloc_rate() const { return _alloc_rate; } | |
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138 void clear_alloc_rate() { _alloc_rate->clear(); } |
| 0 | 139 SpaceStats* space_stats() { return &_space_stats; } |
| 140 void clear_space_stats() { _space_stats = SpaceStats(); } | |
| 141 | |
| 142 void accumulate_statistics(size_t page_size); | |
| 143 void scan_pages(size_t page_size, size_t page_count); | |
| 144 }; | |
| 145 | |
| 146 GrowableArray<LGRPSpace*>* _lgrp_spaces; | |
| 147 size_t _page_size; | |
| 148 unsigned _adaptation_cycles, _samples_count; | |
| 149 | |
| 150 void set_page_size(size_t psz) { _page_size = psz; } | |
| 151 size_t page_size() const { return _page_size; } | |
| 152 | |
| 153 unsigned adaptation_cycles() { return _adaptation_cycles; } | |
| 154 void set_adaptation_cycles(int v) { _adaptation_cycles = v; } | |
| 155 | |
| 156 unsigned samples_count() { return _samples_count; } | |
| 157 void increment_samples_count() { ++_samples_count; } | |
| 158 | |
| 159 size_t _base_space_size; | |
| 160 void set_base_space_size(size_t v) { _base_space_size = v; } | |
| 161 size_t base_space_size() const { return _base_space_size; } | |
| 162 | |
| 163 // Check if the NUMA topology has changed. Add and remove spaces if needed. | |
| 164 // The update can be forced by setting the force parameter equal to true. | |
| 165 bool update_layout(bool force); | |
| 141 | 166 // Bias region towards the lgrp. |
| 167 void bias_region(MemRegion mr, int lgrp_id); | |
| 0 | 168 // Free pages in a given region. |
| 169 void free_region(MemRegion mr); | |
| 170 // Get current chunk size. | |
| 171 size_t current_chunk_size(int i); | |
| 172 // Get default chunk size (equally divide the space). | |
| 173 size_t default_chunk_size(); | |
| 174 // Adapt the chunk size to follow the allocation rate. | |
| 175 size_t adaptive_chunk_size(int i, size_t limit); | |
| 176 // Scan and free invalid pages. | |
| 177 void scan_pages(size_t page_count); | |
| 178 // Return the bottom_region and the top_region. Align them to page_size() boundary. | |
| 179 // |------------------new_region---------------------------------| | |
| 180 // |----bottom_region--|---intersection---|------top_region------| | |
| 181 void select_tails(MemRegion new_region, MemRegion intersection, | |
| 182 MemRegion* bottom_region, MemRegion *top_region); | |
| 183 // Try to merge the invalid region with the bottom or top region by decreasing | |
| 184 // the intersection area. Return the invalid_region aligned to the page_size() | |
| 185 // boundary if it's inside the intersection. Return non-empty invalid_region | |
| 186 // if it lies inside the intersection (also page-aligned). | |
| 187 // |------------------new_region---------------------------------| | |
| 188 // |----------------|-------invalid---|--------------------------| | |
| 189 // |----bottom_region--|---intersection---|------top_region------| | |
| 190 void merge_regions(MemRegion new_region, MemRegion* intersection, | |
| 191 MemRegion *invalid_region); | |
| 192 | |
| 193 public: | |
| 194 GrowableArray<LGRPSpace*>* lgrp_spaces() const { return _lgrp_spaces; } | |
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195 MutableNUMASpace(size_t alignment); |
| 0 | 196 virtual ~MutableNUMASpace(); |
| 197 // Space initialization. | |
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198 virtual void initialize(MemRegion mr, bool clear_space, bool mangle_space, bool setup_pages = SetupPages); |
| 0 | 199 // Update space layout if necessary. Do all adaptive resizing job. |
| 200 virtual void update(); | |
| 201 // Update allocation rate averages. | |
| 202 virtual void accumulate_statistics(); | |
| 203 | |
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204 virtual void clear(bool mangle_space); |
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205 virtual void mangle_unused_area() PRODUCT_RETURN; |
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206 virtual void mangle_unused_area_complete() PRODUCT_RETURN; |
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207 virtual void mangle_region(MemRegion mr) PRODUCT_RETURN; |
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208 virtual void check_mangled_unused_area(HeapWord* limit) PRODUCT_RETURN; |
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209 virtual void check_mangled_unused_area_complete() PRODUCT_RETURN; |
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210 virtual void set_top_for_allocations(HeapWord* v) PRODUCT_RETURN; |
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211 virtual void set_top_for_allocations() PRODUCT_RETURN; |
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212 |
| 0 | 213 virtual void ensure_parsability(); |
| 214 virtual size_t used_in_words() const; | |
| 215 virtual size_t free_in_words() const; | |
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216 |
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217 using MutableSpace::capacity_in_words; |
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218 virtual size_t capacity_in_words(Thread* thr) const; |
| 0 | 219 virtual size_t tlab_capacity(Thread* thr) const; |
| 220 virtual size_t unsafe_max_tlab_alloc(Thread* thr) const; | |
| 221 | |
| 222 // Allocation (return NULL if full) | |
| 223 virtual HeapWord* allocate(size_t word_size); | |
| 224 virtual HeapWord* cas_allocate(size_t word_size); | |
| 225 | |
| 226 // Debugging | |
| 227 virtual void print_on(outputStream* st) const; | |
| 228 virtual void print_short_on(outputStream* st) const; | |
| 6008 | 229 virtual void verify(); |
| 0 | 230 |
| 231 virtual void set_top(HeapWord* value); | |
| 232 }; | |
| 1972 | 233 |
| 234 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_MUTABLENUMASPACE_HPP |