Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/dirtyCardQueue.cpp @ 6628:bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
Summary: Also reviewed by vitalyd@gmail.com. Introduced the WorkerDataArray class. Fixed some minor logging bugs.
Reviewed-by: johnc, mgerdin
author | brutisso |
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date | Thu, 23 Aug 2012 10:21:12 +0200 |
parents | f08d439fab8c |
children | f34d701e952e |
rev | line source |
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342 | 1 /* |
1705 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
342 | 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. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "gc_implementation/g1/dirtyCardQueue.hpp" | |
27 #include "gc_implementation/g1/heapRegionRemSet.hpp" | |
28 #include "runtime/atomic.hpp" | |
29 #include "runtime/mutexLocker.hpp" | |
30 #include "runtime/safepoint.hpp" | |
31 #include "runtime/thread.hpp" | |
32 #include "utilities/workgroup.hpp" | |
33 #ifdef TARGET_OS_FAMILY_linux | |
34 # include "thread_linux.inline.hpp" | |
35 #endif | |
36 #ifdef TARGET_OS_FAMILY_solaris | |
37 # include "thread_solaris.inline.hpp" | |
38 #endif | |
39 #ifdef TARGET_OS_FAMILY_windows | |
40 # include "thread_windows.inline.hpp" | |
41 #endif | |
3960 | 42 #ifdef TARGET_OS_FAMILY_bsd |
43 # include "thread_bsd.inline.hpp" | |
44 #endif | |
342 | 45 |
46 bool DirtyCardQueue::apply_closure(CardTableEntryClosure* cl, | |
47 bool consume, | |
48 size_t worker_i) { | |
49 bool res = true; | |
50 if (_buf != NULL) { | |
51 res = apply_closure_to_buffer(cl, _buf, _index, _sz, | |
52 consume, | |
53 (int) worker_i); | |
54 if (res && consume) _index = _sz; | |
55 } | |
56 return res; | |
57 } | |
58 | |
59 bool DirtyCardQueue::apply_closure_to_buffer(CardTableEntryClosure* cl, | |
60 void** buf, | |
61 size_t index, size_t sz, | |
62 bool consume, | |
63 int worker_i) { | |
64 if (cl == NULL) return true; | |
65 for (size_t i = index; i < sz; i += oopSize) { | |
66 int ind = byte_index_to_index((int)i); | |
67 jbyte* card_ptr = (jbyte*)buf[ind]; | |
68 if (card_ptr != NULL) { | |
69 // Set the entry to null, so we don't do it again (via the test | |
70 // above) if we reconsider this buffer. | |
71 if (consume) buf[ind] = NULL; | |
72 if (!cl->do_card_ptr(card_ptr, worker_i)) return false; | |
73 } | |
74 } | |
75 return true; | |
76 } | |
77 | |
78 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
79 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
80 #endif // _MSC_VER | |
81 | |
1111 | 82 DirtyCardQueueSet::DirtyCardQueueSet(bool notify_when_complete) : |
83 PtrQueueSet(notify_when_complete), | |
342 | 84 _closure(NULL), |
85 _shared_dirty_card_queue(this, true /*perm*/), | |
86 _free_ids(NULL), | |
87 _processed_buffers_mut(0), _processed_buffers_rs_thread(0) | |
88 { | |
89 _all_active = true; | |
90 } | |
91 | |
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92 // Determines how many mutator threads can process the buffers in parallel. |
342 | 93 size_t DirtyCardQueueSet::num_par_ids() { |
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94 return os::processor_count(); |
342 | 95 } |
96 | |
97 void DirtyCardQueueSet::initialize(Monitor* cbl_mon, Mutex* fl_lock, | |
1111 | 98 int process_completed_threshold, |
342 | 99 int max_completed_queue, |
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100 Mutex* lock, PtrQueueSet* fl_owner) { |
1111 | 101 PtrQueueSet::initialize(cbl_mon, fl_lock, process_completed_threshold, |
102 max_completed_queue, fl_owner); | |
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103 set_buffer_size(G1UpdateBufferSize); |
342 | 104 _shared_dirty_card_queue.set_lock(lock); |
105 _free_ids = new FreeIdSet((int) num_par_ids(), _cbl_mon); | |
106 } | |
107 | |
108 void DirtyCardQueueSet::handle_zero_index_for_thread(JavaThread* t) { | |
109 t->dirty_card_queue().handle_zero_index(); | |
110 } | |
111 | |
112 void DirtyCardQueueSet::set_closure(CardTableEntryClosure* closure) { | |
113 _closure = closure; | |
114 } | |
115 | |
116 void DirtyCardQueueSet::iterate_closure_all_threads(bool consume, | |
117 size_t worker_i) { | |
118 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); | |
119 for(JavaThread* t = Threads::first(); t; t = t->next()) { | |
120 bool b = t->dirty_card_queue().apply_closure(_closure, consume); | |
121 guarantee(b, "Should not be interrupted."); | |
122 } | |
123 bool b = shared_dirty_card_queue()->apply_closure(_closure, | |
124 consume, | |
125 worker_i); | |
126 guarantee(b, "Should not be interrupted."); | |
127 } | |
128 | |
129 bool DirtyCardQueueSet::mut_process_buffer(void** buf) { | |
130 | |
131 // Used to determine if we had already claimed a par_id | |
132 // before entering this method. | |
133 bool already_claimed = false; | |
134 | |
135 // We grab the current JavaThread. | |
136 JavaThread* thread = JavaThread::current(); | |
137 | |
138 // We get the the number of any par_id that this thread | |
139 // might have already claimed. | |
140 int worker_i = thread->get_claimed_par_id(); | |
141 | |
142 // If worker_i is not -1 then the thread has already claimed | |
143 // a par_id. We make note of it using the already_claimed value | |
144 if (worker_i != -1) { | |
145 already_claimed = true; | |
146 } else { | |
147 | |
148 // Otherwise we need to claim a par id | |
149 worker_i = _free_ids->claim_par_id(); | |
150 | |
151 // And store the par_id value in the thread | |
152 thread->set_claimed_par_id(worker_i); | |
153 } | |
154 | |
155 bool b = false; | |
156 if (worker_i != -1) { | |
157 b = DirtyCardQueue::apply_closure_to_buffer(_closure, buf, 0, | |
158 _sz, true, worker_i); | |
159 if (b) Atomic::inc(&_processed_buffers_mut); | |
160 | |
161 // If we had not claimed an id before entering the method | |
162 // then we must release the id. | |
163 if (!already_claimed) { | |
164 | |
165 // we release the id | |
166 _free_ids->release_par_id(worker_i); | |
167 | |
168 // and set the claimed_id in the thread to -1 | |
169 thread->set_claimed_par_id(-1); | |
170 } | |
171 } | |
172 return b; | |
173 } | |
174 | |
1111 | 175 |
176 BufferNode* | |
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177 DirtyCardQueueSet::get_completed_buffer(int stop_at) { |
1111 | 178 BufferNode* nd = NULL; |
342 | 179 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); |
180 | |
181 if ((int)_n_completed_buffers <= stop_at) { | |
182 _process_completed = false; | |
183 return NULL; | |
184 } | |
185 | |
186 if (_completed_buffers_head != NULL) { | |
187 nd = _completed_buffers_head; | |
1111 | 188 _completed_buffers_head = nd->next(); |
342 | 189 if (_completed_buffers_head == NULL) |
190 _completed_buffers_tail = NULL; | |
191 _n_completed_buffers--; | |
1111 | 192 assert(_n_completed_buffers >= 0, "Invariant"); |
342 | 193 } |
194 debug_only(assert_completed_buffer_list_len_correct_locked()); | |
195 return nd; | |
196 } | |
197 | |
198 bool DirtyCardQueueSet:: | |
1705 | 199 apply_closure_to_completed_buffer_helper(CardTableEntryClosure* cl, |
200 int worker_i, | |
1111 | 201 BufferNode* nd) { |
342 | 202 if (nd != NULL) { |
1111 | 203 void **buf = BufferNode::make_buffer_from_node(nd); |
204 size_t index = nd->index(); | |
342 | 205 bool b = |
1705 | 206 DirtyCardQueue::apply_closure_to_buffer(cl, buf, |
1111 | 207 index, _sz, |
342 | 208 true, worker_i); |
209 if (b) { | |
210 deallocate_buffer(buf); | |
211 return true; // In normal case, go on to next buffer. | |
212 } else { | |
1111 | 213 enqueue_complete_buffer(buf, index); |
342 | 214 return false; |
215 } | |
216 } else { | |
217 return false; | |
218 } | |
219 } | |
220 | |
1705 | 221 bool DirtyCardQueueSet::apply_closure_to_completed_buffer(CardTableEntryClosure* cl, |
222 int worker_i, | |
223 int stop_at, | |
224 bool during_pause) { | |
225 assert(!during_pause || stop_at == 0, "Should not leave any completed buffers during a pause"); | |
226 BufferNode* nd = get_completed_buffer(stop_at); | |
227 bool res = apply_closure_to_completed_buffer_helper(cl, worker_i, nd); | |
228 if (res) Atomic::inc(&_processed_buffers_rs_thread); | |
229 return res; | |
230 } | |
231 | |
342 | 232 bool DirtyCardQueueSet::apply_closure_to_completed_buffer(int worker_i, |
233 int stop_at, | |
1705 | 234 bool during_pause) { |
235 return apply_closure_to_completed_buffer(_closure, worker_i, | |
236 stop_at, during_pause); | |
342 | 237 } |
238 | |
239 void DirtyCardQueueSet::apply_closure_to_all_completed_buffers() { | |
1111 | 240 BufferNode* nd = _completed_buffers_head; |
342 | 241 while (nd != NULL) { |
242 bool b = | |
1111 | 243 DirtyCardQueue::apply_closure_to_buffer(_closure, |
244 BufferNode::make_buffer_from_node(nd), | |
245 0, _sz, false); | |
342 | 246 guarantee(b, "Should not stop early."); |
1111 | 247 nd = nd->next(); |
342 | 248 } |
249 } | |
250 | |
1705 | 251 // Deallocates any completed log buffers |
252 void DirtyCardQueueSet::clear() { | |
1111 | 253 BufferNode* buffers_to_delete = NULL; |
342 | 254 { |
255 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); | |
256 while (_completed_buffers_head != NULL) { | |
1111 | 257 BufferNode* nd = _completed_buffers_head; |
258 _completed_buffers_head = nd->next(); | |
259 nd->set_next(buffers_to_delete); | |
342 | 260 buffers_to_delete = nd; |
261 } | |
262 _n_completed_buffers = 0; | |
263 _completed_buffers_tail = NULL; | |
264 debug_only(assert_completed_buffer_list_len_correct_locked()); | |
265 } | |
266 while (buffers_to_delete != NULL) { | |
1111 | 267 BufferNode* nd = buffers_to_delete; |
268 buffers_to_delete = nd->next(); | |
269 deallocate_buffer(BufferNode::make_buffer_from_node(nd)); | |
342 | 270 } |
1705 | 271 |
272 } | |
273 | |
274 void DirtyCardQueueSet::abandon_logs() { | |
275 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); | |
276 clear(); | |
342 | 277 // Since abandon is done only at safepoints, we can safely manipulate |
278 // these queues. | |
279 for (JavaThread* t = Threads::first(); t; t = t->next()) { | |
280 t->dirty_card_queue().reset(); | |
281 } | |
282 shared_dirty_card_queue()->reset(); | |
283 } | |
284 | |
285 | |
286 void DirtyCardQueueSet::concatenate_logs() { | |
287 // Iterate over all the threads, if we find a partial log add it to | |
288 // the global list of logs. Temporarily turn off the limit on the number | |
289 // of outstanding buffers. | |
290 int save_max_completed_queue = _max_completed_queue; | |
291 _max_completed_queue = max_jint; | |
292 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); | |
293 for (JavaThread* t = Threads::first(); t; t = t->next()) { | |
294 DirtyCardQueue& dcq = t->dirty_card_queue(); | |
295 if (dcq.size() != 0) { | |
296 void **buf = t->dirty_card_queue().get_buf(); | |
297 // We must NULL out the unused entries, then enqueue. | |
298 for (size_t i = 0; i < t->dirty_card_queue().get_index(); i += oopSize) { | |
299 buf[PtrQueue::byte_index_to_index((int)i)] = NULL; | |
300 } | |
301 enqueue_complete_buffer(dcq.get_buf(), dcq.get_index()); | |
302 dcq.reinitialize(); | |
303 } | |
304 } | |
305 if (_shared_dirty_card_queue.size() != 0) { | |
306 enqueue_complete_buffer(_shared_dirty_card_queue.get_buf(), | |
307 _shared_dirty_card_queue.get_index()); | |
308 _shared_dirty_card_queue.reinitialize(); | |
309 } | |
310 // Restore the completed buffer queue limit. | |
311 _max_completed_queue = save_max_completed_queue; | |
312 } |