29 #include "gc/parallel/psPromotionManager.inline.hpp"
30 #include "gc/parallel/psScavenge.hpp"
31 #include "gc/shared/continuationGCSupport.inline.hpp"
32 #include "gc/shared/gc_globals.hpp"
33 #include "gc/shared/gcTrace.hpp"
34 #include "gc/shared/partialArraySplitter.inline.hpp"
35 #include "gc/shared/partialArrayState.hpp"
36 #include "gc/shared/preservedMarks.inline.hpp"
37 #include "gc/shared/taskqueue.inline.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/iterator.inline.hpp"
42 #include "memory/memRegion.hpp"
43 #include "memory/padded.inline.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "oops/access.inline.hpp"
46 #include "oops/compressedOops.inline.hpp"
47 #include "oops/oopsHierarchy.hpp"
48 #include "utilities/checkedCast.hpp"
49
50 PaddedEnd<PSPromotionManager>* PSPromotionManager::_manager_array = nullptr;
51 PSPromotionManager::PSScannerTasksQueueSet* PSPromotionManager::_stack_array_depth = nullptr;
52 PreservedMarksSet* PSPromotionManager::_preserved_marks_set = nullptr;
53 PSOldGen* PSPromotionManager::_old_gen = nullptr;
54 MutableSpace* PSPromotionManager::_young_space = nullptr;
55 PartialArrayStateManager* PSPromotionManager::_partial_array_state_manager = nullptr;
56
57 void PSPromotionManager::initialize() {
58 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
59
60 _old_gen = heap->old_gen();
61 _young_space = heap->young_gen()->to_space();
62
63 const uint promotion_manager_num = ParallelGCThreads;
64
65 assert(_partial_array_state_manager == nullptr, "Attempt to initialize twice");
66 _partial_array_state_manager
67 = new PartialArrayStateManager(promotion_manager_num);
68
247 assert(!_old_lab.is_flushed() || _old_gen_is_full, "Sanity");
248 if (!_old_lab.is_flushed())
249 _old_lab.flush();
250
251 // Let PSScavenge know if we overflowed
252 if (_young_gen_is_full || _young_gen_has_alloc_failure) {
253 PSScavenge::set_survivor_overflow(true);
254 }
255 }
256
257 void PSPromotionManager::process_array_chunk(objArrayOop obj, size_t start, size_t end) {
258 PSPushContentsClosure pcc(this);
259 obj->oop_iterate_elements_range(&pcc,
260 checked_cast<int>(start),
261 checked_cast<int>(end));
262 }
263
264 void PSPromotionManager::process_array_chunk(PartialArrayState* state, bool stolen) {
265 // Access before release by claim().
266 objArrayOop to_array = objArrayOop(state->destination());
267 PartialArraySplitter::Claim claim =
268 _partial_array_splitter.claim(state, &_claimed_stack_depth, stolen);
269 process_array_chunk(to_array, claim._start, claim._end);
270 }
271
272 void PSPromotionManager::push_objArray(oop old_obj, oop new_obj) {
273 assert(old_obj->is_forwarded(), "precondition");
274 assert(old_obj->forwardee() == new_obj, "precondition");
275 assert(new_obj->is_objArray(), "precondition");
276
277 objArrayOop to_array = objArrayOop(new_obj);
278 size_t array_length = to_array->length();
279 size_t initial_chunk_size =
280 // The source array is unused when processing states.
281 _partial_array_splitter.start(&_claimed_stack_depth, nullptr, to_array, array_length, ParGCArrayScanChunk);
282
283 process_array_chunk(to_array, 0, initial_chunk_size);
284 }
285
286 oop PSPromotionManager::oop_promotion_failed(oop obj, markWord obj_mark) {
287 assert(_old_gen_is_full || PromotionFailureALot, "Sanity");
288
289 // Attempt to CAS in the header.
290 // This tests if the header is still the same as when
291 // this started. If it is the same (i.e., no forwarding
292 // pointer has been installed), then this thread owns
293 // it.
294 if (obj->forward_to_self_atomic(obj_mark) == nullptr) {
295 // We won any races, we "own" this object.
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29 #include "gc/parallel/psPromotionManager.inline.hpp"
30 #include "gc/parallel/psScavenge.hpp"
31 #include "gc/shared/continuationGCSupport.inline.hpp"
32 #include "gc/shared/gc_globals.hpp"
33 #include "gc/shared/gcTrace.hpp"
34 #include "gc/shared/partialArraySplitter.inline.hpp"
35 #include "gc/shared/partialArrayState.hpp"
36 #include "gc/shared/preservedMarks.inline.hpp"
37 #include "gc/shared/taskqueue.inline.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/iterator.inline.hpp"
42 #include "memory/memRegion.hpp"
43 #include "memory/padded.inline.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "oops/access.inline.hpp"
46 #include "oops/compressedOops.inline.hpp"
47 #include "oops/oopsHierarchy.hpp"
48 #include "utilities/checkedCast.hpp"
49 #include "utilities/debug.hpp"
50
51 PaddedEnd<PSPromotionManager>* PSPromotionManager::_manager_array = nullptr;
52 PSPromotionManager::PSScannerTasksQueueSet* PSPromotionManager::_stack_array_depth = nullptr;
53 PreservedMarksSet* PSPromotionManager::_preserved_marks_set = nullptr;
54 PSOldGen* PSPromotionManager::_old_gen = nullptr;
55 MutableSpace* PSPromotionManager::_young_space = nullptr;
56 PartialArrayStateManager* PSPromotionManager::_partial_array_state_manager = nullptr;
57
58 void PSPromotionManager::initialize() {
59 ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
60
61 _old_gen = heap->old_gen();
62 _young_space = heap->young_gen()->to_space();
63
64 const uint promotion_manager_num = ParallelGCThreads;
65
66 assert(_partial_array_state_manager == nullptr, "Attempt to initialize twice");
67 _partial_array_state_manager
68 = new PartialArrayStateManager(promotion_manager_num);
69
248 assert(!_old_lab.is_flushed() || _old_gen_is_full, "Sanity");
249 if (!_old_lab.is_flushed())
250 _old_lab.flush();
251
252 // Let PSScavenge know if we overflowed
253 if (_young_gen_is_full || _young_gen_has_alloc_failure) {
254 PSScavenge::set_survivor_overflow(true);
255 }
256 }
257
258 void PSPromotionManager::process_array_chunk(objArrayOop obj, size_t start, size_t end) {
259 PSPushContentsClosure pcc(this);
260 obj->oop_iterate_elements_range(&pcc,
261 checked_cast<int>(start),
262 checked_cast<int>(end));
263 }
264
265 void PSPromotionManager::process_array_chunk(PartialArrayState* state, bool stolen) {
266 // Access before release by claim().
267 objArrayOop to_array = objArrayOop(state->destination());
268 precond(to_array->is_array_with_oops());
269
270 PartialArraySplitter::Claim claim =
271 _partial_array_splitter.claim(state, &_claimed_stack_depth, stolen);
272
273 process_array_chunk(to_array, claim._start, claim._end);
274 }
275
276 void PSPromotionManager::push_objArray(oop old_obj, oop new_obj) {
277 assert(old_obj->is_forwarded(), "precondition");
278 assert(old_obj->forwardee() == new_obj, "precondition");
279 precond(new_obj->is_array_with_oops());
280
281 objArrayOop to_array = objArrayOop(new_obj);
282 size_t array_length = to_array->length();
283 size_t initial_chunk_size =
284 // The source array is unused when processing states.
285 _partial_array_splitter.start(&_claimed_stack_depth, nullptr, to_array, array_length, ParGCArrayScanChunk);
286
287 process_array_chunk(to_array, 0, initial_chunk_size);
288 }
289
290 oop PSPromotionManager::oop_promotion_failed(oop obj, markWord obj_mark) {
291 assert(_old_gen_is_full || PromotionFailureALot, "Sanity");
292
293 // Attempt to CAS in the header.
294 // This tests if the header is still the same as when
295 // this started. If it is the same (i.e., no forwarding
296 // pointer has been installed), then this thread owns
297 // it.
298 if (obj->forward_to_self_atomic(obj_mark) == nullptr) {
299 // We won any races, we "own" this object.
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