Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/parallelScavenge/psPromotionManager.cpp @ 17937:78bbf4d43a14
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8043029: Change 8037816 breaks HS build with older GCC versions which don't support diagnostic pragmas
8043164: Format warning in traceStream.hpp
Summary: Backport of main fix + two corrections, enables clang compilation, turns on format attributes, corrects/mutes warnings
Reviewed-by: kvn, coleenp, iveresov, twisti
| author | drchase |
|---|---|
| date | Thu, 22 May 2014 15:52:41 -0400 |
| parents | 190899198332 |
| children |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 2002, 2014, 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 #include "precompiled.hpp" |
| 26 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
| 27 #include "gc_implementation/parallelScavenge/psOldGen.hpp" | |
| 28 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" | |
| 29 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
| 10405 | 30 #include "gc_implementation/shared/gcTrace.hpp" |
| 1972 | 31 #include "gc_implementation/shared/mutableSpace.hpp" |
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32 #include "memory/allocation.inline.hpp" |
| 1972 | 33 #include "memory/memRegion.hpp" |
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34 #include "memory/padded.inline.hpp" |
| 1972 | 35 #include "oops/oop.inline.hpp" |
| 36 #include "oops/oop.psgc.inline.hpp" | |
| 0 | 37 |
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38 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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39 |
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40 PaddedEnd<PSPromotionManager>* PSPromotionManager::_manager_array = NULL; |
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41 OopStarTaskQueueSet* PSPromotionManager::_stack_array_depth = NULL; |
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42 PSOldGen* PSPromotionManager::_old_gen = NULL; |
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43 MutableSpace* PSPromotionManager::_young_space = NULL; |
| 0 | 44 |
| 45 void PSPromotionManager::initialize() { | |
| 46 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
| 47 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
| 48 | |
| 49 _old_gen = heap->old_gen(); | |
| 50 _young_space = heap->young_gen()->to_space(); | |
| 51 | |
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52 // To prevent false sharing, we pad the PSPromotionManagers |
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53 // and make sure that the first instance starts at a cache line. |
| 0 | 54 assert(_manager_array == NULL, "Attempt to initialize twice"); |
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55 _manager_array = PaddedArray<PSPromotionManager, mtGC>::create_unfreeable(ParallelGCThreads + 1); |
| 0 | 56 guarantee(_manager_array != NULL, "Could not initialize promotion manager"); |
| 57 | |
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58 _stack_array_depth = new OopStarTaskQueueSet(ParallelGCThreads); |
| 10405 | 59 guarantee(_stack_array_depth != NULL, "Could not initialize promotion manager"); |
| 0 | 60 |
| 61 // Create and register the PSPromotionManager(s) for the worker threads. | |
| 62 for(uint i=0; i<ParallelGCThreads; i++) { | |
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63 stack_array_depth()->register_queue(i, _manager_array[i].claimed_stack_depth()); |
| 0 | 64 } |
| 65 // The VMThread gets its own PSPromotionManager, which is not available | |
| 66 // for work stealing. | |
| 67 } | |
| 68 | |
| 69 PSPromotionManager* PSPromotionManager::gc_thread_promotion_manager(int index) { | |
| 70 assert(index >= 0 && index < (int)ParallelGCThreads, "index out of range"); | |
| 71 assert(_manager_array != NULL, "Sanity"); | |
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72 return &_manager_array[index]; |
| 0 | 73 } |
| 74 | |
| 75 PSPromotionManager* PSPromotionManager::vm_thread_promotion_manager() { | |
| 76 assert(_manager_array != NULL, "Sanity"); | |
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77 return &_manager_array[ParallelGCThreads]; |
| 0 | 78 } |
| 79 | |
| 80 void PSPromotionManager::pre_scavenge() { | |
| 81 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
| 82 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
| 83 | |
| 84 _young_space = heap->young_gen()->to_space(); | |
| 85 | |
| 86 for(uint i=0; i<ParallelGCThreads+1; i++) { | |
| 87 manager_array(i)->reset(); | |
| 88 } | |
| 89 } | |
| 90 | |
| 10405 | 91 bool PSPromotionManager::post_scavenge(YoungGCTracer& gc_tracer) { |
| 92 bool promotion_failure_occurred = false; | |
| 93 | |
| 1665 | 94 TASKQUEUE_STATS_ONLY(if (PrintGCDetails && ParallelGCVerbose) print_stats()); |
| 1638 | 95 for (uint i = 0; i < ParallelGCThreads + 1; i++) { |
| 0 | 96 PSPromotionManager* manager = manager_array(i); |
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97 assert(manager->claimed_stack_depth()->is_empty(), "should be empty"); |
| 10405 | 98 if (manager->_promotion_failed_info.has_failed()) { |
| 99 gc_tracer.report_promotion_failed(manager->_promotion_failed_info); | |
| 100 promotion_failure_occurred = true; | |
| 101 } | |
| 0 | 102 manager->flush_labs(); |
| 103 } | |
| 10405 | 104 return promotion_failure_occurred; |
| 0 | 105 } |
| 106 | |
| 1665 | 107 #if TASKQUEUE_STATS |
| 0 | 108 void |
| 1665 | 109 PSPromotionManager::print_taskqueue_stats(uint i) const { |
| 110 tty->print("%3u ", i); | |
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111 _claimed_stack_depth.stats.print(); |
| 1665 | 112 tty->cr(); |
| 0 | 113 } |
| 114 | |
| 115 void | |
| 1665 | 116 PSPromotionManager::print_local_stats(uint i) const { |
| 117 #define FMT " " SIZE_FORMAT_W(10) | |
| 118 tty->print_cr("%3u" FMT FMT FMT FMT, i, _masked_pushes, _masked_steals, | |
| 119 _arrays_chunked, _array_chunks_processed); | |
| 120 #undef FMT | |
| 121 } | |
| 122 | |
| 123 static const char* const pm_stats_hdr[] = { | |
| 124 " --------masked------- arrays array", | |
| 125 "thr push steal chunked chunks", | |
| 126 "--- ---------- ---------- ---------- ----------" | |
| 127 }; | |
| 128 | |
| 129 void | |
| 0 | 130 PSPromotionManager::print_stats() { |
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131 tty->print_cr("== GC Tasks Stats, GC %3d", |
| 0 | 132 Universe::heap()->total_collections()); |
| 133 | |
| 1665 | 134 tty->print("thr "); TaskQueueStats::print_header(1); tty->cr(); |
| 135 tty->print("--- "); TaskQueueStats::print_header(2); tty->cr(); | |
| 136 for (uint i = 0; i < ParallelGCThreads + 1; ++i) { | |
| 137 manager_array(i)->print_taskqueue_stats(i); | |
| 138 } | |
| 139 | |
| 140 const uint hlines = sizeof(pm_stats_hdr) / sizeof(pm_stats_hdr[0]); | |
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141 for (uint i = 0; i < hlines; ++i) tty->print_cr("%s", pm_stats_hdr[i]); |
| 1665 | 142 for (uint i = 0; i < ParallelGCThreads + 1; ++i) { |
| 143 manager_array(i)->print_local_stats(i); | |
| 0 | 144 } |
| 145 } | |
| 146 | |
| 1665 | 147 void |
| 148 PSPromotionManager::reset_stats() { | |
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149 claimed_stack_depth()->stats.reset(); |
| 1665 | 150 _masked_pushes = _masked_steals = 0; |
| 151 _arrays_chunked = _array_chunks_processed = 0; | |
| 152 } | |
| 153 #endif // TASKQUEUE_STATS | |
| 0 | 154 |
| 155 PSPromotionManager::PSPromotionManager() { | |
| 156 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
| 157 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
| 158 | |
| 159 // We set the old lab's start array. | |
| 160 _old_lab.set_start_array(old_gen()->start_array()); | |
| 161 | |
| 162 uint queue_size; | |
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163 claimed_stack_depth()->initialize(); |
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164 queue_size = claimed_stack_depth()->max_elems(); |
| 0 | 165 |
| 166 _totally_drain = (ParallelGCThreads == 1) || (GCDrainStackTargetSize == 0); | |
| 167 if (_totally_drain) { | |
| 168 _target_stack_size = 0; | |
| 169 } else { | |
| 170 // don't let the target stack size to be more than 1/4 of the entries | |
| 171 _target_stack_size = (uint) MIN2((uint) GCDrainStackTargetSize, | |
| 172 (uint) (queue_size / 4)); | |
| 173 } | |
| 174 | |
| 175 _array_chunk_size = ParGCArrayScanChunk; | |
| 176 // let's choose 1.5x the chunk size | |
| 177 _min_array_size_for_chunking = 3 * _array_chunk_size / 2; | |
| 178 | |
| 179 reset(); | |
| 180 } | |
| 181 | |
| 182 void PSPromotionManager::reset() { | |
| 1638 | 183 assert(stacks_empty(), "reset of non-empty stack"); |
| 0 | 184 |
| 185 // We need to get an assert in here to make sure the labs are always flushed. | |
| 186 | |
| 187 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
| 188 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
| 189 | |
| 190 // Do not prefill the LAB's, save heap wastage! | |
| 191 HeapWord* lab_base = young_space()->top(); | |
| 192 _young_lab.initialize(MemRegion(lab_base, (size_t)0)); | |
| 193 _young_gen_is_full = false; | |
| 194 | |
| 195 lab_base = old_gen()->object_space()->top(); | |
| 196 _old_lab.initialize(MemRegion(lab_base, (size_t)0)); | |
| 197 _old_gen_is_full = false; | |
| 198 | |
| 10405 | 199 _promotion_failed_info.reset(); |
| 200 | |
| 1665 | 201 TASKQUEUE_STATS_ONLY(reset_stats()); |
| 0 | 202 } |
| 203 | |
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204 |
| 0 | 205 void PSPromotionManager::drain_stacks_depth(bool totally_drain) { |
| 206 totally_drain = totally_drain || _totally_drain; | |
| 207 | |
| 208 #ifdef ASSERT | |
| 209 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
| 210 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
| 211 MutableSpace* to_space = heap->young_gen()->to_space(); | |
| 212 MutableSpace* old_space = heap->old_gen()->object_space(); | |
| 213 #endif /* ASSERT */ | |
| 214 | |
| 1638 | 215 OopStarTaskQueue* const tq = claimed_stack_depth(); |
| 0 | 216 do { |
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217 StarTask p; |
| 0 | 218 |
| 219 // Drain overflow stack first, so other threads can steal from | |
| 220 // claimed stack while we work. | |
| 1638 | 221 while (tq->pop_overflow(p)) { |
| 222 process_popped_location_depth(p); | |
| 0 | 223 } |
| 224 | |
| 225 if (totally_drain) { | |
| 1638 | 226 while (tq->pop_local(p)) { |
| 0 | 227 process_popped_location_depth(p); |
| 228 } | |
| 229 } else { | |
| 1638 | 230 while (tq->size() > _target_stack_size && tq->pop_local(p)) { |
| 0 | 231 process_popped_location_depth(p); |
| 232 } | |
| 233 } | |
| 1638 | 234 } while (totally_drain && !tq->taskqueue_empty() || !tq->overflow_empty()); |
| 0 | 235 |
| 1638 | 236 assert(!totally_drain || tq->taskqueue_empty(), "Sanity"); |
| 237 assert(totally_drain || tq->size() <= _target_stack_size, "Sanity"); | |
| 238 assert(tq->overflow_empty(), "Sanity"); | |
| 0 | 239 } |
| 240 | |
| 241 void PSPromotionManager::flush_labs() { | |
| 1638 | 242 assert(stacks_empty(), "Attempt to flush lab with live stack"); |
| 0 | 243 |
| 244 // If either promotion lab fills up, we can flush the | |
| 245 // lab but not refill it, so check first. | |
| 246 assert(!_young_lab.is_flushed() || _young_gen_is_full, "Sanity"); | |
| 247 if (!_young_lab.is_flushed()) | |
| 248 _young_lab.flush(); | |
| 249 | |
| 250 assert(!_old_lab.is_flushed() || _old_gen_is_full, "Sanity"); | |
| 251 if (!_old_lab.is_flushed()) | |
| 252 _old_lab.flush(); | |
| 253 | |
| 254 // Let PSScavenge know if we overflowed | |
| 255 if (_young_gen_is_full) { | |
| 256 PSScavenge::set_survivor_overflow(true); | |
| 257 } | |
| 258 } | |
| 259 | |
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260 template <class T> void PSPromotionManager::process_array_chunk_work( |
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261 oop obj, |
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262 int start, int end) { |
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263 assert(start <= end, "invariant"); |
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264 T* const base = (T*)objArrayOop(obj)->base(); |
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265 T* p = base + start; |
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266 T* const chunk_end = base + end; |
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267 while (p < chunk_end) { |
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268 if (PSScavenge::should_scavenge(p)) { |
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269 claim_or_forward_depth(p); |
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270 } |
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271 ++p; |
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272 } |
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273 } |
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274 |
| 0 | 275 void PSPromotionManager::process_array_chunk(oop old) { |
| 276 assert(PSChunkLargeArrays, "invariant"); | |
| 277 assert(old->is_objArray(), "invariant"); | |
| 278 assert(old->is_forwarded(), "invariant"); | |
| 279 | |
| 1665 | 280 TASKQUEUE_STATS_ONLY(++_array_chunks_processed); |
| 0 | 281 |
| 282 oop const obj = old->forwardee(); | |
| 283 | |
| 284 int start; | |
| 285 int const end = arrayOop(old)->length(); | |
| 286 if (end > (int) _min_array_size_for_chunking) { | |
| 287 // we'll chunk more | |
| 288 start = end - _array_chunk_size; | |
| 289 assert(start > 0, "invariant"); | |
| 290 arrayOop(old)->set_length(start); | |
| 291 push_depth(mask_chunked_array_oop(old)); | |
| 1665 | 292 TASKQUEUE_STATS_ONLY(++_masked_pushes); |
| 0 | 293 } else { |
| 294 // this is the final chunk for this array | |
| 295 start = 0; | |
| 296 int const actual_length = arrayOop(obj)->length(); | |
| 297 arrayOop(old)->set_length(actual_length); | |
| 298 } | |
| 299 | |
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300 if (UseCompressedOops) { |
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301 process_array_chunk_work<narrowOop>(obj, start, end); |
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302 } else { |
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303 process_array_chunk_work<oop>(obj, start, end); |
| 0 | 304 } |
| 305 } | |
| 306 | |
| 307 oop PSPromotionManager::oop_promotion_failed(oop obj, markOop obj_mark) { | |
| 308 assert(_old_gen_is_full || PromotionFailureALot, "Sanity"); | |
| 309 | |
| 310 // Attempt to CAS in the header. | |
| 311 // This tests if the header is still the same as when | |
| 312 // this started. If it is the same (i.e., no forwarding | |
| 313 // pointer has been installed), then this thread owns | |
| 314 // it. | |
| 315 if (obj->cas_forward_to(obj, obj_mark)) { | |
| 316 // We won any races, we "own" this object. | |
| 317 assert(obj == obj->forwardee(), "Sanity"); | |
| 318 | |
| 10405 | 319 _promotion_failed_info.register_copy_failure(obj->size()); |
| 320 | |
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321 obj->push_contents(this); |
| 0 | 322 |
| 323 // Save the mark if needed | |
| 324 PSScavenge::oop_promotion_failed(obj, obj_mark); | |
| 325 } else { | |
| 326 // We lost, someone else "owns" this object | |
| 327 guarantee(obj->is_forwarded(), "Object must be forwarded if the cas failed."); | |
| 328 | |
| 329 // No unallocation to worry about. | |
| 330 obj = obj->forwardee(); | |
| 331 } | |
| 332 | |
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333 #ifndef PRODUCT |
| 0 | 334 if (TraceScavenge) { |
| 335 gclog_or_tty->print_cr("{%s %s 0x%x (%d)}", | |
| 336 "promotion-failure", | |
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337 obj->klass()->internal_name(), |
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338 (void *)obj, obj->size()); |
| 0 | 339 |
| 340 } | |
| 341 #endif | |
| 342 | |
| 343 return obj; | |
| 344 } |