Mercurial > hg > graal-compiler
annotate src/share/vm/utilities/taskqueue.hpp @ 1458:dc114f680d9c
Merge.
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Sat, 13 Nov 2010 08:15:52 +0100 |
parents | 2a1472c30599 |
children | c18cbe5936b8 |
rev | line source |
---|---|
0 | 1 /* |
579 | 2 * Copyright 2001-2009 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
25 template <unsigned int N> |
0 | 26 class TaskQueueSuper: public CHeapObj { |
27 protected: | |
907 | 28 // Internal type for indexing the queue; also used for the tag. |
29 typedef NOT_LP64(uint16_t) LP64_ONLY(uint32_t) idx_t; | |
30 | |
31 // The first free element after the last one pushed (mod N). | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
32 volatile uint _bottom; |
0 | 33 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
34 enum { MOD_N_MASK = N - 1 }; |
907 | 35 |
36 class Age { | |
37 public: | |
38 Age(size_t data = 0) { _data = data; } | |
39 Age(const Age& age) { _data = age._data; } | |
40 Age(idx_t top, idx_t tag) { _fields._top = top; _fields._tag = tag; } | |
0 | 41 |
907 | 42 Age get() const volatile { return _data; } |
43 void set(Age age) volatile { _data = age._data; } | |
44 | |
45 idx_t top() const volatile { return _fields._top; } | |
46 idx_t tag() const volatile { return _fields._tag; } | |
0 | 47 |
907 | 48 // Increment top; if it wraps, increment tag also. |
49 void increment() { | |
50 _fields._top = increment_index(_fields._top); | |
51 if (_fields._top == 0) ++_fields._tag; | |
52 } | |
0 | 53 |
907 | 54 Age cmpxchg(const Age new_age, const Age old_age) volatile { |
55 return (size_t) Atomic::cmpxchg_ptr((intptr_t)new_age._data, | |
56 (volatile intptr_t *)&_data, | |
57 (intptr_t)old_age._data); | |
58 } | |
59 | |
60 bool operator ==(const Age& other) const { return _data == other._data; } | |
0 | 61 |
907 | 62 private: |
63 struct fields { | |
64 idx_t _top; | |
65 idx_t _tag; | |
66 }; | |
67 union { | |
68 size_t _data; | |
69 fields _fields; | |
70 }; | |
0 | 71 }; |
907 | 72 |
73 volatile Age _age; | |
74 | |
75 // These both operate mod N. | |
76 static uint increment_index(uint ind) { | |
77 return (ind + 1) & MOD_N_MASK; | |
0 | 78 } |
907 | 79 static uint decrement_index(uint ind) { |
80 return (ind - 1) & MOD_N_MASK; | |
0 | 81 } |
82 | |
907 | 83 // Returns a number in the range [0..N). If the result is "N-1", it should be |
84 // interpreted as 0. | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
85 uint dirty_size(uint bot, uint top) const { |
907 | 86 return (bot - top) & MOD_N_MASK; |
0 | 87 } |
88 | |
89 // Returns the size corresponding to the given "bot" and "top". | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
90 uint size(uint bot, uint top) const { |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
91 uint sz = dirty_size(bot, top); |
907 | 92 // Has the queue "wrapped", so that bottom is less than top? There's a |
93 // complicated special case here. A pair of threads could perform pop_local | |
94 // and pop_global operations concurrently, starting from a state in which | |
95 // _bottom == _top+1. The pop_local could succeed in decrementing _bottom, | |
96 // and the pop_global in incrementing _top (in which case the pop_global | |
97 // will be awarded the contested queue element.) The resulting state must | |
98 // be interpreted as an empty queue. (We only need to worry about one such | |
99 // event: only the queue owner performs pop_local's, and several concurrent | |
100 // threads attempting to perform the pop_global will all perform the same | |
101 // CAS, and only one can succeed.) Any stealing thread that reads after | |
102 // either the increment or decrement will see an empty queue, and will not | |
103 // join the competitors. The "sz == -1 || sz == N-1" state will not be | |
104 // modified by concurrent queues, so the owner thread can reset the state to | |
105 // _bottom == top so subsequent pushes will be performed normally. | |
106 return (sz == N - 1) ? 0 : sz; | |
0 | 107 } |
108 | |
109 public: | |
110 TaskQueueSuper() : _bottom(0), _age() {} | |
111 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
112 // Return true if the TaskQueue contains any tasks. |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
113 bool peek() { return _bottom != _age.top(); } |
0 | 114 |
115 // Return an estimate of the number of elements in the queue. | |
116 // The "careful" version admits the possibility of pop_local/pop_global | |
117 // races. | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
118 uint size() const { |
907 | 119 return size(_bottom, _age.top()); |
0 | 120 } |
121 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
122 uint dirty_size() const { |
907 | 123 return dirty_size(_bottom, _age.top()); |
0 | 124 } |
125 | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
126 void set_empty() { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
127 _bottom = 0; |
907 | 128 _age.set(0); |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
129 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
130 |
0 | 131 // Maximum number of elements allowed in the queue. This is two less |
132 // than the actual queue size, for somewhat complicated reasons. | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
133 uint max_elems() const { return N - 2; } |
1284 | 134 |
135 // Total size of queue. | |
136 static const uint total_size() { return N; } | |
0 | 137 }; |
138 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
139 template<class E, unsigned int N = TASKQUEUE_SIZE> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
140 class GenericTaskQueue: public TaskQueueSuper<N> { |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
141 protected: |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
142 typedef typename TaskQueueSuper<N>::Age Age; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
143 typedef typename TaskQueueSuper<N>::idx_t idx_t; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
144 |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
145 using TaskQueueSuper<N>::_bottom; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
146 using TaskQueueSuper<N>::_age; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
147 using TaskQueueSuper<N>::increment_index; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
148 using TaskQueueSuper<N>::decrement_index; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
149 using TaskQueueSuper<N>::dirty_size; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
150 |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
151 public: |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
152 using TaskQueueSuper<N>::max_elems; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
153 using TaskQueueSuper<N>::size; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
154 |
0 | 155 private: |
156 // Slow paths for push, pop_local. (pop_global has no fast path.) | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
157 bool push_slow(E t, uint dirty_n_elems); |
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
158 bool pop_local_slow(uint localBot, Age oldAge); |
0 | 159 |
160 public: | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
161 typedef E element_type; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
162 |
0 | 163 // Initializes the queue to empty. |
164 GenericTaskQueue(); | |
165 | |
166 void initialize(); | |
167 | |
168 // Push the task "t" on the queue. Returns "false" iff the queue is | |
169 // full. | |
170 inline bool push(E t); | |
171 | |
172 // If succeeds in claiming a task (from the 'local' end, that is, the | |
173 // most recently pushed task), returns "true" and sets "t" to that task. | |
174 // Otherwise, the queue is empty and returns false. | |
175 inline bool pop_local(E& t); | |
176 | |
177 // If succeeds in claiming a task (from the 'global' end, that is, the | |
178 // least recently pushed task), returns "true" and sets "t" to that task. | |
179 // Otherwise, the queue is empty and returns false. | |
180 bool pop_global(E& t); | |
181 | |
182 // Delete any resource associated with the queue. | |
183 ~GenericTaskQueue(); | |
184 | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
185 // apply the closure to all elements in the task queue |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
186 void oops_do(OopClosure* f); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
187 |
0 | 188 private: |
189 // Element array. | |
190 volatile E* _elems; | |
191 }; | |
192 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
193 template<class E, unsigned int N> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
194 GenericTaskQueue<E, N>::GenericTaskQueue() { |
907 | 195 assert(sizeof(Age) == sizeof(size_t), "Depends on this."); |
0 | 196 } |
197 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
198 template<class E, unsigned int N> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
199 void GenericTaskQueue<E, N>::initialize() { |
907 | 200 _elems = NEW_C_HEAP_ARRAY(E, N); |
0 | 201 guarantee(_elems != NULL, "Allocation failed."); |
202 } | |
203 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
204 template<class E, unsigned int N> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
205 void GenericTaskQueue<E, N>::oops_do(OopClosure* f) { |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
206 // tty->print_cr("START OopTaskQueue::oops_do"); |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
207 uint iters = size(); |
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
208 uint index = _bottom; |
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
209 for (uint i = 0; i < iters; ++i) { |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
210 index = decrement_index(index); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
211 // tty->print_cr(" doing entry %d," INTPTR_T " -> " INTPTR_T, |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
212 // index, &_elems[index], _elems[index]); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
213 E* t = (E*)&_elems[index]; // cast away volatility |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
214 oop* p = (oop*)t; |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
215 assert((*t)->is_oop_or_null(), "Not an oop or null"); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
216 f->do_oop(p); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
217 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
218 // tty->print_cr("END OopTaskQueue::oops_do"); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
219 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
220 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
221 template<class E, unsigned int N> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
222 bool GenericTaskQueue<E, N>::push_slow(E t, uint dirty_n_elems) { |
907 | 223 if (dirty_n_elems == N - 1) { |
0 | 224 // Actually means 0, so do the push. |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
225 uint localBot = _bottom; |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
226 // g++ complains if the volatile result of the assignment is unused. |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
227 const_cast<E&>(_elems[localBot] = t); |
1024
2c03ce058f55
6888847: TaskQueue needs release_store() for correctness on RMO machines
bobv
parents:
907
diff
changeset
|
228 OrderAccess::release_store(&_bottom, increment_index(localBot)); |
0 | 229 return true; |
907 | 230 } |
231 return false; | |
0 | 232 } |
233 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
234 template<class E, unsigned int N> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
235 bool GenericTaskQueue<E, N>:: |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
236 pop_local_slow(uint localBot, Age oldAge) { |
0 | 237 // This queue was observed to contain exactly one element; either this |
238 // thread will claim it, or a competing "pop_global". In either case, | |
239 // the queue will be logically empty afterwards. Create a new Age value | |
240 // that represents the empty queue for the given value of "_bottom". (We | |
241 // must also increment "tag" because of the case where "bottom == 1", | |
242 // "top == 0". A pop_global could read the queue element in that case, | |
243 // then have the owner thread do a pop followed by another push. Without | |
244 // the incrementing of "tag", the pop_global's CAS could succeed, | |
245 // allowing it to believe it has claimed the stale element.) | |
907 | 246 Age newAge((idx_t)localBot, oldAge.tag() + 1); |
0 | 247 // Perhaps a competing pop_global has already incremented "top", in which |
248 // case it wins the element. | |
249 if (localBot == oldAge.top()) { | |
250 // No competing pop_global has yet incremented "top"; we'll try to | |
251 // install new_age, thus claiming the element. | |
907 | 252 Age tempAge = _age.cmpxchg(newAge, oldAge); |
0 | 253 if (tempAge == oldAge) { |
254 // We win. | |
907 | 255 assert(dirty_size(localBot, _age.top()) != N - 1, "sanity"); |
0 | 256 return true; |
257 } | |
258 } | |
907 | 259 // We lose; a completing pop_global gets the element. But the queue is empty |
260 // and top is greater than bottom. Fix this representation of the empty queue | |
261 // to become the canonical one. | |
262 _age.set(newAge); | |
263 assert(dirty_size(localBot, _age.top()) != N - 1, "sanity"); | |
0 | 264 return false; |
265 } | |
266 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
267 template<class E, unsigned int N> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
268 bool GenericTaskQueue<E, N>::pop_global(E& t) { |
907 | 269 Age oldAge = _age.get(); |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
270 uint localBot = _bottom; |
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
271 uint n_elems = size(localBot, oldAge.top()); |
0 | 272 if (n_elems == 0) { |
273 return false; | |
274 } | |
907 | 275 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
276 const_cast<E&>(t = _elems[oldAge.top()]); |
907 | 277 Age newAge(oldAge); |
278 newAge.increment(); | |
279 Age resAge = _age.cmpxchg(newAge, oldAge); | |
280 | |
0 | 281 // Note that using "_bottom" here might fail, since a pop_local might |
282 // have decremented it. | |
907 | 283 assert(dirty_size(localBot, newAge.top()) != N - 1, "sanity"); |
284 return resAge == oldAge; | |
0 | 285 } |
286 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
287 template<class E, unsigned int N> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
288 GenericTaskQueue<E, N>::~GenericTaskQueue() { |
0 | 289 FREE_C_HEAP_ARRAY(E, _elems); |
290 } | |
291 | |
292 // Inherits the typedef of "Task" from above. | |
293 class TaskQueueSetSuper: public CHeapObj { | |
294 protected: | |
295 static int randomParkAndMiller(int* seed0); | |
296 public: | |
297 // Returns "true" if some TaskQueue in the set contains a task. | |
298 virtual bool peek() = 0; | |
299 }; | |
300 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
301 template<class T> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
302 class GenericTaskQueueSet: public TaskQueueSetSuper { |
0 | 303 private: |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
304 uint _n; |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
305 T** _queues; |
0 | 306 |
307 public: | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
308 typedef typename T::element_type E; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
309 |
0 | 310 GenericTaskQueueSet(int n) : _n(n) { |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
311 typedef T* GenericTaskQueuePtr; |
0 | 312 _queues = NEW_C_HEAP_ARRAY(GenericTaskQueuePtr, n); |
313 for (int i = 0; i < n; i++) { | |
314 _queues[i] = NULL; | |
315 } | |
316 } | |
317 | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
318 bool steal_1_random(uint queue_num, int* seed, E& t); |
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
319 bool steal_best_of_2(uint queue_num, int* seed, E& t); |
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
320 bool steal_best_of_all(uint queue_num, int* seed, E& t); |
0 | 321 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
322 void register_queue(uint i, T* q); |
0 | 323 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
324 T* queue(uint n); |
0 | 325 |
326 // The thread with queue number "queue_num" (and whose random number seed | |
327 // is at "seed") is trying to steal a task from some other queue. (It | |
328 // may try several queues, according to some configuration parameter.) | |
329 // If some steal succeeds, returns "true" and sets "t" the stolen task, | |
330 // otherwise returns false. | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
331 bool steal(uint queue_num, int* seed, E& t); |
0 | 332 |
333 bool peek(); | |
334 }; | |
335 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
336 template<class T> void |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
337 GenericTaskQueueSet<T>::register_queue(uint i, T* q) { |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
338 assert(i < _n, "index out of range."); |
0 | 339 _queues[i] = q; |
340 } | |
341 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
342 template<class T> T* |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
343 GenericTaskQueueSet<T>::queue(uint i) { |
0 | 344 return _queues[i]; |
345 } | |
346 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
347 template<class T> bool |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
348 GenericTaskQueueSet<T>::steal(uint queue_num, int* seed, E& t) { |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
349 for (uint i = 0; i < 2 * _n; i++) |
0 | 350 if (steal_best_of_2(queue_num, seed, t)) |
351 return true; | |
352 return false; | |
353 } | |
354 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
355 template<class T> bool |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
356 GenericTaskQueueSet<T>::steal_best_of_all(uint queue_num, int* seed, E& t) { |
0 | 357 if (_n > 2) { |
358 int best_k; | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
359 uint best_sz = 0; |
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
360 for (uint k = 0; k < _n; k++) { |
0 | 361 if (k == queue_num) continue; |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
362 uint sz = _queues[k]->size(); |
0 | 363 if (sz > best_sz) { |
364 best_sz = sz; | |
365 best_k = k; | |
366 } | |
367 } | |
368 return best_sz > 0 && _queues[best_k]->pop_global(t); | |
369 } else if (_n == 2) { | |
370 // Just try the other one. | |
371 int k = (queue_num + 1) % 2; | |
372 return _queues[k]->pop_global(t); | |
373 } else { | |
374 assert(_n == 1, "can't be zero."); | |
375 return false; | |
376 } | |
377 } | |
378 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
379 template<class T> bool |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
380 GenericTaskQueueSet<T>::steal_1_random(uint queue_num, int* seed, E& t) { |
0 | 381 if (_n > 2) { |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
382 uint k = queue_num; |
0 | 383 while (k == queue_num) k = randomParkAndMiller(seed) % _n; |
384 return _queues[2]->pop_global(t); | |
385 } else if (_n == 2) { | |
386 // Just try the other one. | |
387 int k = (queue_num + 1) % 2; | |
388 return _queues[k]->pop_global(t); | |
389 } else { | |
390 assert(_n == 1, "can't be zero."); | |
391 return false; | |
392 } | |
393 } | |
394 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
395 template<class T> bool |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
396 GenericTaskQueueSet<T>::steal_best_of_2(uint queue_num, int* seed, E& t) { |
0 | 397 if (_n > 2) { |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
398 uint k1 = queue_num; |
0 | 399 while (k1 == queue_num) k1 = randomParkAndMiller(seed) % _n; |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
400 uint k2 = queue_num; |
0 | 401 while (k2 == queue_num || k2 == k1) k2 = randomParkAndMiller(seed) % _n; |
402 // Sample both and try the larger. | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
403 uint sz1 = _queues[k1]->size(); |
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
404 uint sz2 = _queues[k2]->size(); |
0 | 405 if (sz2 > sz1) return _queues[k2]->pop_global(t); |
406 else return _queues[k1]->pop_global(t); | |
407 } else if (_n == 2) { | |
408 // Just try the other one. | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
409 uint k = (queue_num + 1) % 2; |
0 | 410 return _queues[k]->pop_global(t); |
411 } else { | |
412 assert(_n == 1, "can't be zero."); | |
413 return false; | |
414 } | |
415 } | |
416 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
417 template<class T> |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
418 bool GenericTaskQueueSet<T>::peek() { |
0 | 419 // Try all the queues. |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
420 for (uint j = 0; j < _n; j++) { |
0 | 421 if (_queues[j]->peek()) |
422 return true; | |
423 } | |
424 return false; | |
425 } | |
426 | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
427 // When to terminate from the termination protocol. |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
428 class TerminatorTerminator: public CHeapObj { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
429 public: |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
430 virtual bool should_exit_termination() = 0; |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
431 }; |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
432 |
0 | 433 // A class to aid in the termination of a set of parallel tasks using |
434 // TaskQueueSet's for work stealing. | |
435 | |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
436 #undef TRACESPINNING |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
437 |
0 | 438 class ParallelTaskTerminator: public StackObj { |
439 private: | |
440 int _n_threads; | |
441 TaskQueueSetSuper* _queue_set; | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
442 int _offered_termination; |
0 | 443 |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
444 #ifdef TRACESPINNING |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
445 static uint _total_yields; |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
446 static uint _total_spins; |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
447 static uint _total_peeks; |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
448 #endif |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
449 |
0 | 450 bool peek_in_queue_set(); |
451 protected: | |
452 virtual void yield(); | |
453 void sleep(uint millis); | |
454 | |
455 public: | |
456 | |
457 // "n_threads" is the number of threads to be terminated. "queue_set" is a | |
458 // queue sets of work queues of other threads. | |
459 ParallelTaskTerminator(int n_threads, TaskQueueSetSuper* queue_set); | |
460 | |
461 // The current thread has no work, and is ready to terminate if everyone | |
462 // else is. If returns "true", all threads are terminated. If returns | |
463 // "false", available work has been observed in one of the task queues, | |
464 // so the global task is not complete. | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
465 bool offer_termination() { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
466 return offer_termination(NULL); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
467 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
468 |
907 | 469 // As above, but it also terminates if the should_exit_termination() |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
470 // method of the terminator parameter returns true. If terminator is |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
471 // NULL, then it is ignored. |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
472 bool offer_termination(TerminatorTerminator* terminator); |
0 | 473 |
474 // Reset the terminator, so that it may be reused again. | |
475 // The caller is responsible for ensuring that this is done | |
476 // in an MT-safe manner, once the previous round of use of | |
477 // the terminator is finished. | |
478 void reset_for_reuse(); | |
479 | |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
480 #ifdef TRACESPINNING |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
481 static uint total_yields() { return _total_yields; } |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
482 static uint total_spins() { return _total_spins; } |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
483 static uint total_peeks() { return _total_peeks; } |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
484 static void print_termination_counts(); |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
541
diff
changeset
|
485 #endif |
0 | 486 }; |
487 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
488 template<class E, unsigned int N> inline bool |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
489 GenericTaskQueue<E, N>::push(E t) { |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
490 uint localBot = _bottom; |
907 | 491 assert((localBot >= 0) && (localBot < N), "_bottom out of range."); |
492 idx_t top = _age.top(); | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
493 uint dirty_n_elems = dirty_size(localBot, top); |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
494 assert(dirty_n_elems < N, "n_elems out of range."); |
0 | 495 if (dirty_n_elems < max_elems()) { |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
496 // g++ complains if the volatile result of the assignment is unused. |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
497 const_cast<E&>(_elems[localBot] = t); |
1024
2c03ce058f55
6888847: TaskQueue needs release_store() for correctness on RMO machines
bobv
parents:
907
diff
changeset
|
498 OrderAccess::release_store(&_bottom, increment_index(localBot)); |
0 | 499 return true; |
500 } else { | |
501 return push_slow(t, dirty_n_elems); | |
502 } | |
503 } | |
504 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
505 template<class E, unsigned int N> inline bool |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
506 GenericTaskQueue<E, N>::pop_local(E& t) { |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
507 uint localBot = _bottom; |
907 | 508 // This value cannot be N-1. That can only occur as a result of |
0 | 509 // the assignment to bottom in this method. If it does, this method |
510 // resets the size( to 0 before the next call (which is sequential, | |
511 // since this is pop_local.) | |
907 | 512 uint dirty_n_elems = dirty_size(localBot, _age.top()); |
513 assert(dirty_n_elems != N - 1, "Shouldn't be possible..."); | |
0 | 514 if (dirty_n_elems == 0) return false; |
515 localBot = decrement_index(localBot); | |
516 _bottom = localBot; | |
517 // This is necessary to prevent any read below from being reordered | |
518 // before the store just above. | |
519 OrderAccess::fence(); | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
520 const_cast<E&>(t = _elems[localBot]); |
0 | 521 // This is a second read of "age"; the "size()" above is the first. |
522 // If there's still at least one element in the queue, based on the | |
523 // "_bottom" and "age" we've read, then there can be no interference with | |
524 // a "pop_global" operation, and we're done. | |
907 | 525 idx_t tp = _age.top(); // XXX |
0 | 526 if (size(localBot, tp) > 0) { |
907 | 527 assert(dirty_size(localBot, tp) != N - 1, "sanity"); |
0 | 528 return true; |
529 } else { | |
530 // Otherwise, the queue contained exactly one element; we take the slow | |
531 // path. | |
907 | 532 return pop_local_slow(localBot, _age.get()); |
0 | 533 } |
534 } | |
535 | |
536 typedef oop Task; | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
537 typedef GenericTaskQueue<Task> OopTaskQueue; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
538 typedef GenericTaskQueueSet<OopTaskQueue> OopTaskQueueSet; |
0 | 539 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
540 #ifdef _MSC_VER |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
541 #pragma warning(push) |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
542 // warning C4522: multiple assignment operators specified |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
543 #pragma warning(disable:4522) |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
544 #endif |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
545 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
546 // This is a container class for either an oop* or a narrowOop*. |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
547 // Both are pushed onto a task queue and the consumer will test is_narrow() |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
548 // to determine which should be processed. |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
549 class StarTask { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
550 void* _holder; // either union oop* or narrowOop* |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
551 |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
552 enum { COMPRESSED_OOP_MASK = 1 }; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
553 |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
554 public: |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
555 StarTask(narrowOop* p) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
556 assert(((uintptr_t)p & COMPRESSED_OOP_MASK) == 0, "Information loss!"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
557 _holder = (void *)((uintptr_t)p | COMPRESSED_OOP_MASK); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
558 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
559 StarTask(oop* p) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
560 assert(((uintptr_t)p & COMPRESSED_OOP_MASK) == 0, "Information loss!"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
561 _holder = (void*)p; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
562 } |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
563 StarTask() { _holder = NULL; } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
564 operator oop*() { return (oop*)_holder; } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
565 operator narrowOop*() { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
566 return (narrowOop*)((uintptr_t)_holder & ~COMPRESSED_OOP_MASK); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
567 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
568 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
569 StarTask& operator=(const StarTask& t) { |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
570 _holder = t._holder; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
571 return *this; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
572 } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
573 volatile StarTask& operator=(const volatile StarTask& t) volatile { |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
574 _holder = t._holder; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
575 return *this; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
576 } |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
577 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
578 bool is_narrow() const { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
579 return (((uintptr_t)_holder & COMPRESSED_OOP_MASK) != 0); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
580 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
581 }; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
582 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
583 class ObjArrayTask |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
584 { |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
585 public: |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
586 ObjArrayTask(oop o = NULL, int idx = 0): _obj(o), _index(idx) { } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
587 ObjArrayTask(oop o, size_t idx): _obj(o), _index(int(idx)) { |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
588 assert(idx <= size_t(max_jint), "too big"); |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
589 } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
590 ObjArrayTask(const ObjArrayTask& t): _obj(t._obj), _index(t._index) { } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
591 |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
592 ObjArrayTask& operator =(const ObjArrayTask& t) { |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
593 _obj = t._obj; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
594 _index = t._index; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
595 return *this; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
596 } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
597 volatile ObjArrayTask& |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
598 operator =(const volatile ObjArrayTask& t) volatile { |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
599 _obj = t._obj; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
600 _index = t._index; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
601 return *this; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
602 } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
603 |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
604 inline oop obj() const { return _obj; } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
605 inline int index() const { return _index; } |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
606 |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
607 DEBUG_ONLY(bool is_valid() const); // Tasks to be pushed/popped must be valid. |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
608 |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
609 private: |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
610 oop _obj; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
611 int _index; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
612 }; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
613 |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
614 #ifdef _MSC_VER |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
615 #pragma warning(pop) |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
616 #endif |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
617 |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
618 typedef GenericTaskQueue<StarTask> OopStarTaskQueue; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
619 typedef GenericTaskQueueSet<OopStarTaskQueue> OopStarTaskQueueSet; |
0 | 620 |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
621 typedef size_t RegionTask; // index for region |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
622 typedef GenericTaskQueue<RegionTask> RegionTaskQueue; |
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
1284
diff
changeset
|
623 typedef GenericTaskQueueSet<RegionTaskQueue> RegionTaskQueueSet; |
0 | 624 |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
625 class RegionTaskQueueWithOverflow: public CHeapObj { |
0 | 626 protected: |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
627 RegionTaskQueue _region_queue; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
628 GrowableArray<RegionTask>* _overflow_stack; |
0 | 629 |
630 public: | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
631 RegionTaskQueueWithOverflow() : _overflow_stack(NULL) {} |
0 | 632 // Initialize both stealable queue and overflow |
633 void initialize(); | |
634 // Save first to stealable queue and then to overflow | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
635 void save(RegionTask t); |
0 | 636 // Retrieve first from overflow and then from stealable queue |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
637 bool retrieve(RegionTask& region_index); |
0 | 638 // Retrieve from stealable queue |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
639 bool retrieve_from_stealable_queue(RegionTask& region_index); |
0 | 640 // Retrieve from overflow |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
641 bool retrieve_from_overflow(RegionTask& region_index); |
0 | 642 bool is_empty(); |
643 bool stealable_is_empty(); | |
644 bool overflow_is_empty(); | |
541
23673011938d
6787254: Work queue capacity can be increased substantially on some platforms
ysr
parents:
375
diff
changeset
|
645 uint stealable_size() { return _region_queue.size(); } |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
646 RegionTaskQueue* task_queue() { return &_region_queue; } |
0 | 647 }; |
648 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
356
diff
changeset
|
649 #define USE_RegionTaskQueueWithOverflow |