Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.inline.hpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 6cd6d394f280 |
| children | 63a4eb8bcd23 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CONCURRENTMARKSWEEPGENERATION_INLINE_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CONCURRENTMARKSWEEPGENERATION_INLINE_HPP | |
| 27 | |
| 28 #include "gc_implementation/concurrentMarkSweep/cmsLockVerifier.hpp" | |
| 29 #include "gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp" | |
| 30 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.hpp" | |
| 31 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" | |
| 32 #include "gc_implementation/shared/gcUtil.hpp" | |
| 33 #include "memory/defNewGeneration.hpp" | |
| 34 | |
| 0 | 35 inline void CMSBitMap::clear_all() { |
| 36 assert_locked(); | |
| 37 // CMS bitmaps are usually cover large memory regions | |
| 38 _bm.clear_large(); | |
| 39 return; | |
| 40 } | |
| 41 | |
| 42 inline size_t CMSBitMap::heapWordToOffset(HeapWord* addr) const { | |
| 43 return (pointer_delta(addr, _bmStartWord)) >> _shifter; | |
| 44 } | |
| 45 | |
| 46 inline HeapWord* CMSBitMap::offsetToHeapWord(size_t offset) const { | |
| 47 return _bmStartWord + (offset << _shifter); | |
| 48 } | |
| 49 | |
| 50 inline size_t CMSBitMap::heapWordDiffToOffsetDiff(size_t diff) const { | |
| 51 assert((diff & ((1 << _shifter) - 1)) == 0, "argument check"); | |
| 52 return diff >> _shifter; | |
| 53 } | |
| 54 | |
| 55 inline void CMSBitMap::mark(HeapWord* addr) { | |
| 56 assert_locked(); | |
| 57 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 58 "outside underlying space?"); | |
| 59 _bm.set_bit(heapWordToOffset(addr)); | |
| 60 } | |
| 61 | |
| 62 inline bool CMSBitMap::par_mark(HeapWord* addr) { | |
| 63 assert_locked(); | |
| 64 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 65 "outside underlying space?"); | |
| 66 return _bm.par_at_put(heapWordToOffset(addr), true); | |
| 67 } | |
| 68 | |
| 69 inline void CMSBitMap::par_clear(HeapWord* addr) { | |
| 70 assert_locked(); | |
| 71 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 72 "outside underlying space?"); | |
| 73 _bm.par_at_put(heapWordToOffset(addr), false); | |
| 74 } | |
| 75 | |
| 76 inline void CMSBitMap::mark_range(MemRegion mr) { | |
| 77 NOT_PRODUCT(region_invariant(mr)); | |
| 78 // Range size is usually just 1 bit. | |
| 79 _bm.set_range(heapWordToOffset(mr.start()), heapWordToOffset(mr.end()), | |
| 80 BitMap::small_range); | |
| 81 } | |
| 82 | |
| 83 inline void CMSBitMap::clear_range(MemRegion mr) { | |
| 84 NOT_PRODUCT(region_invariant(mr)); | |
| 85 // Range size is usually just 1 bit. | |
| 86 _bm.clear_range(heapWordToOffset(mr.start()), heapWordToOffset(mr.end()), | |
| 87 BitMap::small_range); | |
| 88 } | |
| 89 | |
| 90 inline void CMSBitMap::par_mark_range(MemRegion mr) { | |
| 91 NOT_PRODUCT(region_invariant(mr)); | |
| 92 // Range size is usually just 1 bit. | |
| 93 _bm.par_set_range(heapWordToOffset(mr.start()), heapWordToOffset(mr.end()), | |
| 94 BitMap::small_range); | |
| 95 } | |
| 96 | |
| 97 inline void CMSBitMap::par_clear_range(MemRegion mr) { | |
| 98 NOT_PRODUCT(region_invariant(mr)); | |
| 99 // Range size is usually just 1 bit. | |
| 100 _bm.par_clear_range(heapWordToOffset(mr.start()), heapWordToOffset(mr.end()), | |
| 101 BitMap::small_range); | |
| 102 } | |
| 103 | |
| 104 inline void CMSBitMap::mark_large_range(MemRegion mr) { | |
| 105 NOT_PRODUCT(region_invariant(mr)); | |
| 106 // Range size must be greater than 32 bytes. | |
| 107 _bm.set_range(heapWordToOffset(mr.start()), heapWordToOffset(mr.end()), | |
| 108 BitMap::large_range); | |
| 109 } | |
| 110 | |
| 111 inline void CMSBitMap::clear_large_range(MemRegion mr) { | |
| 112 NOT_PRODUCT(region_invariant(mr)); | |
| 113 // Range size must be greater than 32 bytes. | |
| 114 _bm.clear_range(heapWordToOffset(mr.start()), heapWordToOffset(mr.end()), | |
| 115 BitMap::large_range); | |
| 116 } | |
| 117 | |
| 118 inline void CMSBitMap::par_mark_large_range(MemRegion mr) { | |
| 119 NOT_PRODUCT(region_invariant(mr)); | |
| 120 // Range size must be greater than 32 bytes. | |
| 121 _bm.par_set_range(heapWordToOffset(mr.start()), heapWordToOffset(mr.end()), | |
| 122 BitMap::large_range); | |
| 123 } | |
| 124 | |
| 125 inline void CMSBitMap::par_clear_large_range(MemRegion mr) { | |
| 126 NOT_PRODUCT(region_invariant(mr)); | |
| 127 // Range size must be greater than 32 bytes. | |
| 128 _bm.par_clear_range(heapWordToOffset(mr.start()), heapWordToOffset(mr.end()), | |
| 129 BitMap::large_range); | |
| 130 } | |
| 131 | |
| 132 // Starting at "addr" (inclusive) return a memory region | |
| 133 // corresponding to the first maximally contiguous marked ("1") region. | |
| 134 inline MemRegion CMSBitMap::getAndClearMarkedRegion(HeapWord* addr) { | |
| 135 return getAndClearMarkedRegion(addr, endWord()); | |
| 136 } | |
| 137 | |
| 138 // Starting at "start_addr" (inclusive) return a memory region | |
| 139 // corresponding to the first maximal contiguous marked ("1") region | |
| 140 // strictly less than end_addr. | |
| 141 inline MemRegion CMSBitMap::getAndClearMarkedRegion(HeapWord* start_addr, | |
| 142 HeapWord* end_addr) { | |
| 143 HeapWord *start, *end; | |
| 144 assert_locked(); | |
| 145 start = getNextMarkedWordAddress (start_addr, end_addr); | |
| 146 end = getNextUnmarkedWordAddress(start, end_addr); | |
| 147 assert(start <= end, "Consistency check"); | |
| 148 MemRegion mr(start, end); | |
| 149 if (!mr.is_empty()) { | |
| 150 clear_range(mr); | |
| 151 } | |
| 152 return mr; | |
| 153 } | |
| 154 | |
| 155 inline bool CMSBitMap::isMarked(HeapWord* addr) const { | |
| 156 assert_locked(); | |
| 157 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 158 "outside underlying space?"); | |
| 159 return _bm.at(heapWordToOffset(addr)); | |
| 160 } | |
| 161 | |
| 162 // The same as isMarked() but without a lock check. | |
| 163 inline bool CMSBitMap::par_isMarked(HeapWord* addr) const { | |
| 164 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 165 "outside underlying space?"); | |
| 166 return _bm.at(heapWordToOffset(addr)); | |
| 167 } | |
| 168 | |
| 169 | |
| 170 inline bool CMSBitMap::isUnmarked(HeapWord* addr) const { | |
| 171 assert_locked(); | |
| 172 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 173 "outside underlying space?"); | |
| 174 return !_bm.at(heapWordToOffset(addr)); | |
| 175 } | |
| 176 | |
| 177 // Return the HeapWord address corresponding to next "1" bit | |
| 178 // (inclusive). | |
| 179 inline HeapWord* CMSBitMap::getNextMarkedWordAddress(HeapWord* addr) const { | |
| 180 return getNextMarkedWordAddress(addr, endWord()); | |
| 181 } | |
| 182 | |
| 183 // Return the least HeapWord address corresponding to next "1" bit | |
| 184 // starting at start_addr (inclusive) but strictly less than end_addr. | |
| 185 inline HeapWord* CMSBitMap::getNextMarkedWordAddress( | |
| 186 HeapWord* start_addr, HeapWord* end_addr) const { | |
| 187 assert_locked(); | |
| 188 size_t nextOffset = _bm.get_next_one_offset( | |
| 189 heapWordToOffset(start_addr), | |
| 190 heapWordToOffset(end_addr)); | |
| 191 HeapWord* nextAddr = offsetToHeapWord(nextOffset); | |
| 192 assert(nextAddr >= start_addr && | |
| 193 nextAddr <= end_addr, "get_next_one postcondition"); | |
| 194 assert((nextAddr == end_addr) || | |
| 195 isMarked(nextAddr), "get_next_one postcondition"); | |
| 196 return nextAddr; | |
| 197 } | |
| 198 | |
| 199 | |
| 200 // Return the HeapWord address corrsponding to the next "0" bit | |
| 201 // (inclusive). | |
| 202 inline HeapWord* CMSBitMap::getNextUnmarkedWordAddress(HeapWord* addr) const { | |
| 203 return getNextUnmarkedWordAddress(addr, endWord()); | |
| 204 } | |
| 205 | |
| 206 // Return the HeapWord address corrsponding to the next "0" bit | |
| 207 // (inclusive). | |
| 208 inline HeapWord* CMSBitMap::getNextUnmarkedWordAddress( | |
| 209 HeapWord* start_addr, HeapWord* end_addr) const { | |
| 210 assert_locked(); | |
| 211 size_t nextOffset = _bm.get_next_zero_offset( | |
| 212 heapWordToOffset(start_addr), | |
| 213 heapWordToOffset(end_addr)); | |
| 214 HeapWord* nextAddr = offsetToHeapWord(nextOffset); | |
| 215 assert(nextAddr >= start_addr && | |
| 216 nextAddr <= end_addr, "get_next_zero postcondition"); | |
| 217 assert((nextAddr == end_addr) || | |
| 218 isUnmarked(nextAddr), "get_next_zero postcondition"); | |
| 219 return nextAddr; | |
| 220 } | |
| 221 | |
| 222 inline bool CMSBitMap::isAllClear() const { | |
| 223 assert_locked(); | |
| 224 return getNextMarkedWordAddress(startWord()) >= endWord(); | |
| 225 } | |
| 226 | |
| 227 inline void CMSBitMap::iterate(BitMapClosure* cl, HeapWord* left, | |
| 228 HeapWord* right) { | |
| 229 assert_locked(); | |
| 230 left = MAX2(_bmStartWord, left); | |
| 231 right = MIN2(_bmStartWord + _bmWordSize, right); | |
| 232 if (right > left) { | |
| 233 _bm.iterate(cl, heapWordToOffset(left), heapWordToOffset(right)); | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 inline void CMSCollector::start_icms() { | |
| 238 if (CMSIncrementalMode) { | |
| 239 ConcurrentMarkSweepThread::start_icms(); | |
| 240 } | |
| 241 } | |
| 242 | |
| 243 inline void CMSCollector::stop_icms() { | |
| 244 if (CMSIncrementalMode) { | |
| 245 ConcurrentMarkSweepThread::stop_icms(); | |
| 246 } | |
| 247 } | |
| 248 | |
| 249 inline void CMSCollector::disable_icms() { | |
| 250 if (CMSIncrementalMode) { | |
| 251 ConcurrentMarkSweepThread::disable_icms(); | |
| 252 } | |
| 253 } | |
| 254 | |
| 255 inline void CMSCollector::enable_icms() { | |
| 256 if (CMSIncrementalMode) { | |
| 257 ConcurrentMarkSweepThread::enable_icms(); | |
| 258 } | |
| 259 } | |
| 260 | |
| 261 inline void CMSCollector::icms_wait() { | |
| 262 if (CMSIncrementalMode) { | |
| 263 cmsThread()->icms_wait(); | |
| 264 } | |
| 265 } | |
| 266 | |
| 267 inline void CMSCollector::save_sweep_limits() { | |
| 268 _cmsGen->save_sweep_limit(); | |
| 269 } | |
| 270 | |
| 271 inline bool CMSCollector::is_dead_obj(oop obj) const { | |
| 272 HeapWord* addr = (HeapWord*)obj; | |
| 273 assert((_cmsGen->cmsSpace()->is_in_reserved(addr) | |
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274 && _cmsGen->cmsSpace()->block_is_obj(addr)), |
| 0 | 275 "must be object"); |
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276 return should_unload_classes() && |
| 0 | 277 _collectorState == Sweeping && |
| 278 !_markBitMap.isMarked(addr); | |
| 279 } | |
| 280 | |
| 281 inline bool CMSCollector::should_abort_preclean() const { | |
| 282 // We are in the midst of an "abortable preclean" and either | |
| 283 // scavenge is done or foreground GC wants to take over collection | |
| 284 return _collectorState == AbortablePreclean && | |
| 285 (_abort_preclean || _foregroundGCIsActive || | |
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286 GenCollectedHeap::heap()->incremental_collection_will_fail(true /* consult_young */)); |
| 0 | 287 } |
| 288 | |
| 289 inline size_t CMSCollector::get_eden_used() const { | |
| 290 return _young_gen->as_DefNewGeneration()->eden()->used(); | |
| 291 } | |
| 292 | |
| 293 inline size_t CMSCollector::get_eden_capacity() const { | |
| 294 return _young_gen->as_DefNewGeneration()->eden()->capacity(); | |
| 295 } | |
| 296 | |
| 297 inline bool CMSStats::valid() const { | |
| 298 return _valid_bits == _ALL_VALID; | |
| 299 } | |
| 300 | |
| 301 inline void CMSStats::record_gc0_begin() { | |
| 302 if (_gc0_begin_time.is_updated()) { | |
| 303 float last_gc0_period = _gc0_begin_time.seconds(); | |
| 304 _gc0_period = AdaptiveWeightedAverage::exp_avg(_gc0_period, | |
| 305 last_gc0_period, _gc0_alpha); | |
| 306 _gc0_alpha = _saved_alpha; | |
| 307 _valid_bits |= _GC0_VALID; | |
| 308 } | |
| 309 _cms_used_at_gc0_begin = _cms_gen->cmsSpace()->used(); | |
| 310 | |
| 311 _gc0_begin_time.update(); | |
| 312 } | |
| 313 | |
| 314 inline void CMSStats::record_gc0_end(size_t cms_gen_bytes_used) { | |
| 315 float last_gc0_duration = _gc0_begin_time.seconds(); | |
| 316 _gc0_duration = AdaptiveWeightedAverage::exp_avg(_gc0_duration, | |
| 317 last_gc0_duration, _gc0_alpha); | |
| 318 | |
| 319 // Amount promoted. | |
| 320 _cms_used_at_gc0_end = cms_gen_bytes_used; | |
| 321 | |
| 322 size_t promoted_bytes = 0; | |
| 323 if (_cms_used_at_gc0_end >= _cms_used_at_gc0_begin) { | |
| 324 promoted_bytes = _cms_used_at_gc0_end - _cms_used_at_gc0_begin; | |
| 325 } | |
| 326 | |
| 327 // If the younger gen collections were skipped, then the | |
| 328 // number of promoted bytes will be 0 and adding it to the | |
| 329 // average will incorrectly lessen the average. It is, however, | |
| 330 // also possible that no promotion was needed. | |
| 331 // | |
| 332 // _gc0_promoted used to be calculated as | |
| 333 // _gc0_promoted = AdaptiveWeightedAverage::exp_avg(_gc0_promoted, | |
| 334 // promoted_bytes, _gc0_alpha); | |
| 335 _cms_gen->gc_stats()->avg_promoted()->sample(promoted_bytes); | |
| 336 _gc0_promoted = (size_t) _cms_gen->gc_stats()->avg_promoted()->average(); | |
| 337 | |
| 338 // Amount directly allocated. | |
| 339 size_t allocated_bytes = _cms_gen->direct_allocated_words() * HeapWordSize; | |
| 340 _cms_gen->reset_direct_allocated_words(); | |
| 341 _cms_allocated = AdaptiveWeightedAverage::exp_avg(_cms_allocated, | |
| 342 allocated_bytes, _gc0_alpha); | |
| 343 } | |
| 344 | |
| 345 inline void CMSStats::record_cms_begin() { | |
| 346 _cms_timer.stop(); | |
| 347 | |
| 348 // This is just an approximate value, but is good enough. | |
| 349 _cms_used_at_cms_begin = _cms_used_at_gc0_end; | |
| 350 | |
| 351 _cms_period = AdaptiveWeightedAverage::exp_avg((float)_cms_period, | |
| 352 (float) _cms_timer.seconds(), _cms_alpha); | |
| 353 _cms_begin_time.update(); | |
| 354 | |
| 355 _cms_timer.reset(); | |
| 356 _cms_timer.start(); | |
| 357 } | |
| 358 | |
| 359 inline void CMSStats::record_cms_end() { | |
| 360 _cms_timer.stop(); | |
| 361 | |
| 362 float cur_duration = _cms_timer.seconds(); | |
| 363 _cms_duration = AdaptiveWeightedAverage::exp_avg(_cms_duration, | |
| 364 cur_duration, _cms_alpha); | |
| 365 | |
| 366 // Avoid division by 0. | |
| 367 const size_t cms_used_mb = MAX2(_cms_used_at_cms_begin / M, (size_t)1); | |
| 368 _cms_duration_per_mb = AdaptiveWeightedAverage::exp_avg(_cms_duration_per_mb, | |
| 369 cur_duration / cms_used_mb, | |
| 370 _cms_alpha); | |
| 371 | |
| 372 _cms_end_time.update(); | |
| 373 _cms_alpha = _saved_alpha; | |
| 374 _allow_duty_cycle_reduction = true; | |
| 375 _valid_bits |= _CMS_VALID; | |
| 376 | |
| 377 _cms_timer.start(); | |
| 378 } | |
| 379 | |
| 380 inline double CMSStats::cms_time_since_begin() const { | |
| 381 return _cms_begin_time.seconds(); | |
| 382 } | |
| 383 | |
| 384 inline double CMSStats::cms_time_since_end() const { | |
| 385 return _cms_end_time.seconds(); | |
| 386 } | |
| 387 | |
| 388 inline double CMSStats::promotion_rate() const { | |
| 389 assert(valid(), "statistics not valid yet"); | |
| 390 return gc0_promoted() / gc0_period(); | |
| 391 } | |
| 392 | |
| 393 inline double CMSStats::cms_allocation_rate() const { | |
| 394 assert(valid(), "statistics not valid yet"); | |
| 395 return cms_allocated() / gc0_period(); | |
| 396 } | |
| 397 | |
| 398 inline double CMSStats::cms_consumption_rate() const { | |
| 399 assert(valid(), "statistics not valid yet"); | |
| 400 return (gc0_promoted() + cms_allocated()) / gc0_period(); | |
| 401 } | |
| 402 | |
| 403 inline unsigned int CMSStats::icms_update_duty_cycle() { | |
| 404 // Update the duty cycle only if pacing is enabled and the stats are valid | |
| 405 // (after at least one young gen gc and one cms cycle have completed). | |
| 406 if (CMSIncrementalPacing && valid()) { | |
| 407 return icms_update_duty_cycle_impl(); | |
| 408 } | |
| 409 return _icms_duty_cycle; | |
| 410 } | |
| 411 | |
| 412 inline void ConcurrentMarkSweepGeneration::save_sweep_limit() { | |
| 413 cmsSpace()->save_sweep_limit(); | |
| 414 } | |
| 415 | |
| 416 inline size_t ConcurrentMarkSweepGeneration::capacity() const { | |
| 417 return _cmsSpace->capacity(); | |
| 418 } | |
| 419 | |
| 420 inline size_t ConcurrentMarkSweepGeneration::used() const { | |
| 421 return _cmsSpace->used(); | |
| 422 } | |
| 423 | |
| 424 inline size_t ConcurrentMarkSweepGeneration::free() const { | |
| 425 return _cmsSpace->free(); | |
| 426 } | |
| 427 | |
| 428 inline MemRegion ConcurrentMarkSweepGeneration::used_region() const { | |
| 429 return _cmsSpace->used_region(); | |
| 430 } | |
| 431 | |
| 432 inline MemRegion ConcurrentMarkSweepGeneration::used_region_at_save_marks() const { | |
| 433 return _cmsSpace->used_region_at_save_marks(); | |
| 434 } | |
| 435 | |
| 436 inline void MarkFromRootsClosure::do_yield_check() { | |
| 437 if (ConcurrentMarkSweepThread::should_yield() && | |
| 438 !_collector->foregroundGCIsActive() && | |
| 439 _yield) { | |
| 440 do_yield_work(); | |
| 441 } | |
| 442 } | |
| 443 | |
| 444 inline void Par_MarkFromRootsClosure::do_yield_check() { | |
| 445 if (ConcurrentMarkSweepThread::should_yield() && | |
| 446 !_collector->foregroundGCIsActive() && | |
| 447 _yield) { | |
| 448 do_yield_work(); | |
| 449 } | |
| 450 } | |
| 451 | |
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452 inline void PushOrMarkClosure::do_yield_check() { |
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453 _parent->do_yield_check(); |
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454 } |
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455 |
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456 inline void Par_PushOrMarkClosure::do_yield_check() { |
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457 _parent->do_yield_check(); |
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458 } |
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459 |
| 0 | 460 // Return value of "true" indicates that the on-going preclean |
| 461 // should be aborted. | |
| 462 inline bool ScanMarkedObjectsAgainCarefullyClosure::do_yield_check() { | |
| 463 if (ConcurrentMarkSweepThread::should_yield() && | |
| 464 !_collector->foregroundGCIsActive() && | |
| 465 _yield) { | |
| 466 // Sample young gen size before and after yield | |
| 467 _collector->sample_eden(); | |
| 468 do_yield_work(); | |
| 469 _collector->sample_eden(); | |
| 470 return _collector->should_abort_preclean(); | |
| 471 } | |
| 472 return false; | |
| 473 } | |
| 474 | |
| 475 inline void SurvivorSpacePrecleanClosure::do_yield_check() { | |
| 476 if (ConcurrentMarkSweepThread::should_yield() && | |
| 477 !_collector->foregroundGCIsActive() && | |
| 478 _yield) { | |
| 479 // Sample young gen size before and after yield | |
| 480 _collector->sample_eden(); | |
| 481 do_yield_work(); | |
| 482 _collector->sample_eden(); | |
| 483 } | |
| 484 } | |
| 485 | |
| 486 inline void SweepClosure::do_yield_check(HeapWord* addr) { | |
| 487 if (ConcurrentMarkSweepThread::should_yield() && | |
| 488 !_collector->foregroundGCIsActive() && | |
| 489 _yield) { | |
| 490 do_yield_work(addr); | |
| 491 } | |
| 492 } | |
| 493 | |
| 494 inline void MarkRefsIntoAndScanClosure::do_yield_check() { | |
| 495 // The conditions are ordered for the remarking phase | |
| 496 // when _yield is false. | |
| 497 if (_yield && | |
| 498 !_collector->foregroundGCIsActive() && | |
| 499 ConcurrentMarkSweepThread::should_yield()) { | |
| 500 do_yield_work(); | |
| 501 } | |
| 502 } | |
| 503 | |
| 504 | |
| 505 inline void ModUnionClosure::do_MemRegion(MemRegion mr) { | |
| 506 // Align the end of mr so it's at a card boundary. | |
| 507 // This is superfluous except at the end of the space; | |
| 508 // we should do better than this XXX | |
| 509 MemRegion mr2(mr.start(), (HeapWord*)round_to((intptr_t)mr.end(), | |
| 510 CardTableModRefBS::card_size /* bytes */)); | |
| 511 _t->mark_range(mr2); | |
| 512 } | |
| 513 | |
| 514 inline void ModUnionClosurePar::do_MemRegion(MemRegion mr) { | |
| 515 // Align the end of mr so it's at a card boundary. | |
| 516 // This is superfluous except at the end of the space; | |
| 517 // we should do better than this XXX | |
| 518 MemRegion mr2(mr.start(), (HeapWord*)round_to((intptr_t)mr.end(), | |
| 519 CardTableModRefBS::card_size /* bytes */)); | |
| 520 _t->par_mark_range(mr2); | |
| 521 } | |
| 1972 | 522 |
| 523 #endif // SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CONCURRENTMARKSWEEPGENERATION_INLINE_HPP |