Mercurial > hg > graal-compiler
annotate src/share/vm/memory/threadLocalAllocBuffer.hpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
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| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | 9e321dcfa5b7 |
| children | f95d63e2154a |
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| 0 | 1 /* |
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2 * Copyright (c) 1999, 2007, 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 | |
| 25 class GlobalTLABStats; | |
| 26 | |
| 27 // ThreadLocalAllocBuffer: a descriptor for thread-local storage used by | |
| 28 // the threads for allocation. | |
| 29 // It is thread-private at any time, but maybe multiplexed over | |
| 30 // time across multiple threads. The park()/unpark() pair is | |
| 31 // used to make it avaiable for such multiplexing. | |
| 32 class ThreadLocalAllocBuffer: public CHeapObj { | |
| 33 friend class VMStructs; | |
| 34 private: | |
| 35 HeapWord* _start; // address of TLAB | |
| 36 HeapWord* _top; // address after last allocation | |
| 37 HeapWord* _pf_top; // allocation prefetch watermark | |
| 38 HeapWord* _end; // allocation end (excluding alignment_reserve) | |
| 39 size_t _desired_size; // desired size (including alignment_reserve) | |
| 40 size_t _refill_waste_limit; // hold onto tlab if free() is larger than this | |
| 41 | |
| 42 static unsigned _target_refills; // expected number of refills between GCs | |
| 43 | |
| 44 unsigned _number_of_refills; | |
| 45 unsigned _fast_refill_waste; | |
| 46 unsigned _slow_refill_waste; | |
| 47 unsigned _gc_waste; | |
| 48 unsigned _slow_allocations; | |
| 49 | |
| 50 AdaptiveWeightedAverage _allocation_fraction; // fraction of eden allocated in tlabs | |
| 51 | |
| 52 void accumulate_statistics(); | |
| 53 void initialize_statistics(); | |
| 54 | |
| 55 void set_start(HeapWord* start) { _start = start; } | |
| 56 void set_end(HeapWord* end) { _end = end; } | |
| 57 void set_top(HeapWord* top) { _top = top; } | |
| 58 void set_pf_top(HeapWord* pf_top) { _pf_top = pf_top; } | |
| 59 void set_desired_size(size_t desired_size) { _desired_size = desired_size; } | |
| 60 void set_refill_waste_limit(size_t waste) { _refill_waste_limit = waste; } | |
| 61 | |
| 62 size_t initial_refill_waste_limit() { return desired_size() / TLABRefillWasteFraction; } | |
| 63 | |
| 64 static int target_refills() { return _target_refills; } | |
| 65 size_t initial_desired_size(); | |
| 66 | |
| 67 size_t remaining() const { return end() == NULL ? 0 : pointer_delta(hard_end(), top()); } | |
| 68 | |
| 69 // Make parsable and release it. | |
| 70 void reset(); | |
| 71 | |
| 72 // Resize based on amount of allocation, etc. | |
| 73 void resize(); | |
| 74 | |
| 75 void invariants() const { assert(top() >= start() && top() <= end(), "invalid tlab"); } | |
| 76 | |
| 77 void initialize(HeapWord* start, HeapWord* top, HeapWord* end); | |
| 78 | |
| 79 void print_stats(const char* tag); | |
| 80 | |
| 81 Thread* myThread(); | |
| 82 | |
| 83 // statistics | |
| 84 | |
| 85 int number_of_refills() const { return _number_of_refills; } | |
| 86 int fast_refill_waste() const { return _fast_refill_waste; } | |
| 87 int slow_refill_waste() const { return _slow_refill_waste; } | |
| 88 int gc_waste() const { return _gc_waste; } | |
| 89 int slow_allocations() const { return _slow_allocations; } | |
| 90 | |
| 91 static GlobalTLABStats* _global_stats; | |
| 92 static GlobalTLABStats* global_stats() { return _global_stats; } | |
| 93 | |
| 94 public: | |
| 95 ThreadLocalAllocBuffer() : _allocation_fraction(TLABAllocationWeight) { | |
| 96 // do nothing. tlabs must be inited by initialize() calls | |
| 97 } | |
| 98 | |
| 99 static const size_t min_size() { return align_object_size(MinTLABSize / HeapWordSize); } | |
| 100 static const size_t max_size(); | |
| 101 | |
| 102 HeapWord* start() const { return _start; } | |
| 103 HeapWord* end() const { return _end; } | |
| 104 HeapWord* hard_end() const { return _end + alignment_reserve(); } | |
| 105 HeapWord* top() const { return _top; } | |
| 106 HeapWord* pf_top() const { return _pf_top; } | |
| 107 size_t desired_size() const { return _desired_size; } | |
| 108 size_t free() const { return pointer_delta(end(), top()); } | |
| 109 // Don't discard tlab if remaining space is larger than this. | |
| 110 size_t refill_waste_limit() const { return _refill_waste_limit; } | |
| 111 | |
| 112 // Allocate size HeapWords. The memory is NOT initialized to zero. | |
| 113 inline HeapWord* allocate(size_t size); | |
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114 |
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115 // Reserve space at the end of TLAB |
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116 static size_t end_reserve() { |
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117 int reserve_size = typeArrayOopDesc::header_size(T_INT); |
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118 if (AllocatePrefetchStyle == 3) { |
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119 // BIS is used to prefetch - we need a space for it. |
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120 // +1 for rounding up to next cache line +1 to be safe |
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121 int lines = AllocatePrefetchLines + 2; |
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122 int step_size = AllocatePrefetchStepSize; |
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123 int distance = AllocatePrefetchDistance; |
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124 int prefetch_end = (distance + step_size*lines)/(int)HeapWordSize; |
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125 reserve_size = MAX2(reserve_size, prefetch_end); |
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126 } |
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127 return reserve_size; |
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128 } |
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129 static size_t alignment_reserve() { return align_object_size(end_reserve()); } |
| 0 | 130 static size_t alignment_reserve_in_bytes() { return alignment_reserve() * HeapWordSize; } |
| 131 | |
| 132 // Return tlab size or remaining space in eden such that the | |
| 133 // space is large enough to hold obj_size and necessary fill space. | |
| 134 // Otherwise return 0; | |
| 135 inline size_t compute_size(size_t obj_size); | |
| 136 | |
| 137 // Record slow allocation | |
| 138 inline void record_slow_allocation(size_t obj_size); | |
| 139 | |
| 140 // Initialization at startup | |
| 141 static void startup_initialization(); | |
| 142 | |
| 143 // Make an in-use tlab parsable, optionally also retiring it. | |
| 144 void make_parsable(bool retire); | |
| 145 | |
| 146 // Retire in-use tlab before allocation of a new tlab | |
| 147 void clear_before_allocation(); | |
| 148 | |
| 149 // Accumulate statistics across all tlabs before gc | |
| 150 static void accumulate_statistics_before_gc(); | |
| 151 | |
| 152 // Resize tlabs for all threads | |
| 153 static void resize_all_tlabs(); | |
| 154 | |
| 155 void fill(HeapWord* start, HeapWord* top, size_t new_size); | |
| 156 void initialize(); | |
| 157 | |
| 158 static size_t refill_waste_limit_increment() { return TLABWasteIncrement; } | |
| 159 | |
| 160 // Code generation support | |
| 161 static ByteSize start_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _start); } | |
| 162 static ByteSize end_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _end ); } | |
| 163 static ByteSize top_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _top ); } | |
| 164 static ByteSize pf_top_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _pf_top ); } | |
| 165 static ByteSize size_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _desired_size ); } | |
| 166 static ByteSize refill_waste_limit_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _refill_waste_limit ); } | |
| 167 | |
| 168 static ByteSize number_of_refills_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _number_of_refills ); } | |
| 169 static ByteSize fast_refill_waste_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _fast_refill_waste ); } | |
| 170 static ByteSize slow_allocations_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _slow_allocations ); } | |
| 171 | |
| 172 void verify(); | |
| 173 }; | |
| 174 | |
| 175 class GlobalTLABStats: public CHeapObj { | |
| 176 private: | |
| 177 | |
| 178 // Accumulate perfdata in private variables because | |
| 179 // PerfData should be write-only for security reasons | |
| 180 // (see perfData.hpp) | |
| 181 unsigned _allocating_threads; | |
| 182 unsigned _total_refills; | |
| 183 unsigned _max_refills; | |
| 184 size_t _total_allocation; | |
| 185 size_t _total_gc_waste; | |
| 186 size_t _max_gc_waste; | |
| 187 size_t _total_slow_refill_waste; | |
| 188 size_t _max_slow_refill_waste; | |
| 189 size_t _total_fast_refill_waste; | |
| 190 size_t _max_fast_refill_waste; | |
| 191 unsigned _total_slow_allocations; | |
| 192 unsigned _max_slow_allocations; | |
| 193 | |
| 194 PerfVariable* _perf_allocating_threads; | |
| 195 PerfVariable* _perf_total_refills; | |
| 196 PerfVariable* _perf_max_refills; | |
| 197 PerfVariable* _perf_allocation; | |
| 198 PerfVariable* _perf_gc_waste; | |
| 199 PerfVariable* _perf_max_gc_waste; | |
| 200 PerfVariable* _perf_slow_refill_waste; | |
| 201 PerfVariable* _perf_max_slow_refill_waste; | |
| 202 PerfVariable* _perf_fast_refill_waste; | |
| 203 PerfVariable* _perf_max_fast_refill_waste; | |
| 204 PerfVariable* _perf_slow_allocations; | |
| 205 PerfVariable* _perf_max_slow_allocations; | |
| 206 | |
| 207 AdaptiveWeightedAverage _allocating_threads_avg; | |
| 208 | |
| 209 public: | |
| 210 GlobalTLABStats(); | |
| 211 | |
| 212 // Initialize all counters | |
| 213 void initialize(); | |
| 214 | |
| 215 // Write all perf counters to the perf_counters | |
| 216 void publish(); | |
| 217 | |
| 218 void print(); | |
| 219 | |
| 220 // Accessors | |
| 221 unsigned allocating_threads_avg() { | |
| 222 return MAX2((unsigned)(_allocating_threads_avg.average() + 0.5), 1U); | |
| 223 } | |
| 224 | |
| 225 size_t allocation() { | |
| 226 return _total_allocation; | |
| 227 } | |
| 228 | |
| 229 // Update methods | |
| 230 | |
| 231 void update_allocating_threads() { | |
| 232 _allocating_threads++; | |
| 233 } | |
| 234 void update_number_of_refills(unsigned value) { | |
| 235 _total_refills += value; | |
| 236 _max_refills = MAX2(_max_refills, value); | |
| 237 } | |
| 238 void update_allocation(size_t value) { | |
| 239 _total_allocation += value; | |
| 240 } | |
| 241 void update_gc_waste(size_t value) { | |
| 242 _total_gc_waste += value; | |
| 243 _max_gc_waste = MAX2(_max_gc_waste, value); | |
| 244 } | |
| 245 void update_fast_refill_waste(size_t value) { | |
| 246 _total_fast_refill_waste += value; | |
| 247 _max_fast_refill_waste = MAX2(_max_fast_refill_waste, value); | |
| 248 } | |
| 249 void update_slow_refill_waste(size_t value) { | |
| 250 _total_slow_refill_waste += value; | |
| 251 _max_slow_refill_waste = MAX2(_max_slow_refill_waste, value); | |
| 252 } | |
| 253 void update_slow_allocations(unsigned value) { | |
| 254 _total_slow_allocations += value; | |
| 255 _max_slow_allocations = MAX2(_max_slow_allocations, value); | |
| 256 } | |
| 257 }; |