Mercurial > hg > graal-jvmci-8
comparison src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20223:b0c374311c4e
8035400: Move G1ParScanThreadState into its own files
Summary: Extract the G1ParScanThreadState class from G1CollectedHeap.?pp into its own files.
Reviewed-by: brutisso, mgerdin
author | tschatzl |
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date | Mon, 21 Jul 2014 09:41:04 +0200 |
parents | 6b52700a896b |
children | a2328cbebb23 |
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inserted
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20222:0abcece2ee27 | 20223:b0c374311c4e |
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40 #include "gc_implementation/g1/g1EvacFailure.hpp" | 40 #include "gc_implementation/g1/g1EvacFailure.hpp" |
41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" | 41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
42 #include "gc_implementation/g1/g1Log.hpp" | 42 #include "gc_implementation/g1/g1Log.hpp" |
43 #include "gc_implementation/g1/g1MarkSweep.hpp" | 43 #include "gc_implementation/g1/g1MarkSweep.hpp" |
44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | 44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" |
45 #include "gc_implementation/g1/g1ParScanThreadState.inline.hpp" | |
45 #include "gc_implementation/g1/g1RemSet.inline.hpp" | 46 #include "gc_implementation/g1/g1RemSet.inline.hpp" |
46 #include "gc_implementation/g1/g1StringDedup.hpp" | 47 #include "gc_implementation/g1/g1StringDedup.hpp" |
47 #include "gc_implementation/g1/g1YCTypes.hpp" | 48 #include "gc_implementation/g1/g1YCTypes.hpp" |
48 #include "gc_implementation/g1/heapRegion.inline.hpp" | 49 #include "gc_implementation/g1/heapRegion.inline.hpp" |
49 #include "gc_implementation/g1/heapRegionRemSet.hpp" | 50 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
58 #include "memory/generationSpec.hpp" | 59 #include "memory/generationSpec.hpp" |
59 #include "memory/iterator.hpp" | 60 #include "memory/iterator.hpp" |
60 #include "memory/referenceProcessor.hpp" | 61 #include "memory/referenceProcessor.hpp" |
61 #include "oops/oop.inline.hpp" | 62 #include "oops/oop.inline.hpp" |
62 #include "oops/oop.pcgc.inline.hpp" | 63 #include "oops/oop.pcgc.inline.hpp" |
63 #include "runtime/prefetch.inline.hpp" | |
64 #include "runtime/orderAccess.inline.hpp" | 64 #include "runtime/orderAccess.inline.hpp" |
65 #include "runtime/vmThread.hpp" | 65 #include "runtime/vmThread.hpp" |
66 #include "utilities/ticks.hpp" | |
67 | 66 |
68 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; | 67 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
69 | 68 |
70 // turn it on so that the contents of the young list (scan-only / | 69 // turn it on so that the contents of the young list (scan-only / |
71 // to-be-collected) are printed at "strategic" points before / during | 70 // to-be-collected) are printed at "strategic" points before / during |
4566 } | 4565 } |
4567 | 4566 |
4568 G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : | 4567 G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : |
4569 ParGCAllocBuffer(gclab_word_size), _retired(true) { } | 4568 ParGCAllocBuffer(gclab_word_size), _retired(true) { } |
4570 | 4569 |
4571 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num, ReferenceProcessor* rp) | |
4572 : _g1h(g1h), | |
4573 _refs(g1h->task_queue(queue_num)), | |
4574 _dcq(&g1h->dirty_card_queue_set()), | |
4575 _ct_bs(g1h->g1_barrier_set()), | |
4576 _g1_rem(g1h->g1_rem_set()), | |
4577 _hash_seed(17), _queue_num(queue_num), | |
4578 _term_attempts(0), | |
4579 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), | |
4580 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), | |
4581 _age_table(false), _scanner(g1h, this, rp), | |
4582 _strong_roots_time(0), _term_time(0), | |
4583 _alloc_buffer_waste(0), _undo_waste(0) { | |
4584 // we allocate G1YoungSurvRateNumRegions plus one entries, since | |
4585 // we "sacrifice" entry 0 to keep track of surviving bytes for | |
4586 // non-young regions (where the age is -1) | |
4587 // We also add a few elements at the beginning and at the end in | |
4588 // an attempt to eliminate cache contention | |
4589 uint real_length = 1 + _g1h->g1_policy()->young_cset_region_length(); | |
4590 uint array_length = PADDING_ELEM_NUM + | |
4591 real_length + | |
4592 PADDING_ELEM_NUM; | |
4593 _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length, mtGC); | |
4594 if (_surviving_young_words_base == NULL) | |
4595 vm_exit_out_of_memory(array_length * sizeof(size_t), OOM_MALLOC_ERROR, | |
4596 "Not enough space for young surv histo."); | |
4597 _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; | |
4598 memset(_surviving_young_words, 0, (size_t) real_length * sizeof(size_t)); | |
4599 | |
4600 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; | |
4601 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; | |
4602 | |
4603 _start = os::elapsedTime(); | |
4604 } | |
4605 | |
4606 void | |
4607 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
4608 { | |
4609 st->print_raw_cr("GC Termination Stats"); | |
4610 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
4611 " ------waste (KiB)------"); | |
4612 st->print_raw_cr("thr ms ms % ms % attempts" | |
4613 " total alloc undo"); | |
4614 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
4615 " ------- ------- -------"); | |
4616 } | |
4617 | |
4618 void | |
4619 G1ParScanThreadState::print_termination_stats(int i, | |
4620 outputStream* const st) const | |
4621 { | |
4622 const double elapsed_ms = elapsed_time() * 1000.0; | |
4623 const double s_roots_ms = strong_roots_time() * 1000.0; | |
4624 const double term_ms = term_time() * 1000.0; | |
4625 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
4626 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
4627 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
4628 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
4629 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
4630 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
4631 alloc_buffer_waste() * HeapWordSize / K, | |
4632 undo_waste() * HeapWordSize / K); | |
4633 } | |
4634 | |
4635 #ifdef ASSERT | |
4636 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { | |
4637 assert(ref != NULL, "invariant"); | |
4638 assert(UseCompressedOops, "sanity"); | |
4639 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); | |
4640 oop p = oopDesc::load_decode_heap_oop(ref); | |
4641 assert(_g1h->is_in_g1_reserved(p), | |
4642 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); | |
4643 return true; | |
4644 } | |
4645 | |
4646 bool G1ParScanThreadState::verify_ref(oop* ref) const { | |
4647 assert(ref != NULL, "invariant"); | |
4648 if (has_partial_array_mask(ref)) { | |
4649 // Must be in the collection set--it's already been copied. | |
4650 oop p = clear_partial_array_mask(ref); | |
4651 assert(_g1h->obj_in_cs(p), | |
4652 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); | |
4653 } else { | |
4654 oop p = oopDesc::load_decode_heap_oop(ref); | |
4655 assert(_g1h->is_in_g1_reserved(p), | |
4656 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); | |
4657 } | |
4658 return true; | |
4659 } | |
4660 | |
4661 bool G1ParScanThreadState::verify_task(StarTask ref) const { | |
4662 if (ref.is_narrow()) { | |
4663 return verify_ref((narrowOop*) ref); | |
4664 } else { | |
4665 return verify_ref((oop*) ref); | |
4666 } | |
4667 } | |
4668 #endif // ASSERT | |
4669 | |
4670 void G1ParScanThreadState::trim_queue() { | |
4671 assert(_evac_failure_cl != NULL, "not set"); | |
4672 | |
4673 StarTask ref; | |
4674 do { | |
4675 // Drain the overflow stack first, so other threads can steal. | |
4676 while (refs()->pop_overflow(ref)) { | |
4677 deal_with_reference(ref); | |
4678 } | |
4679 | |
4680 while (refs()->pop_local(ref)) { | |
4681 deal_with_reference(ref); | |
4682 } | |
4683 } while (!refs()->is_empty()); | |
4684 } | |
4685 | |
4686 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, | |
4687 G1ParScanThreadState* par_scan_state) : | |
4688 _g1(g1), _par_scan_state(par_scan_state), | |
4689 _worker_id(par_scan_state->queue_num()) { } | |
4690 | |
4691 void G1ParCopyHelper::mark_object(oop obj) { | 4570 void G1ParCopyHelper::mark_object(oop obj) { |
4692 #ifdef ASSERT | 4571 #ifdef ASSERT |
4693 HeapRegion* hr = _g1->heap_region_containing(obj); | 4572 HeapRegion* hr = _g1->heap_region_containing(obj); |
4694 assert(hr != NULL, "sanity"); | 4573 assert(hr != NULL, "sanity"); |
4695 assert(!hr->in_collection_set(), "should not mark objects in the CSet"); | 4574 assert(!hr->in_collection_set(), "should not mark objects in the CSet"); |
4717 // The object might be in the process of being copied by another | 4596 // The object might be in the process of being copied by another |
4718 // worker so we cannot trust that its to-space image is | 4597 // worker so we cannot trust that its to-space image is |
4719 // well-formed. So we have to read its size from its from-space | 4598 // well-formed. So we have to read its size from its from-space |
4720 // image which we know should not be changing. | 4599 // image which we know should not be changing. |
4721 _cm->grayRoot(to_obj, (size_t) from_obj->size(), _worker_id); | 4600 _cm->grayRoot(to_obj, (size_t) from_obj->size(), _worker_id); |
4722 } | |
4723 | |
4724 oop G1ParScanThreadState::copy_to_survivor_space(oop const old) { | |
4725 size_t word_sz = old->size(); | |
4726 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); | |
4727 // +1 to make the -1 indexes valid... | |
4728 int young_index = from_region->young_index_in_cset()+1; | |
4729 assert( (from_region->is_young() && young_index > 0) || | |
4730 (!from_region->is_young() && young_index == 0), "invariant" ); | |
4731 G1CollectorPolicy* g1p = _g1h->g1_policy(); | |
4732 markOop m = old->mark(); | |
4733 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() | |
4734 : m->age(); | |
4735 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
4736 word_sz); | |
4737 HeapWord* obj_ptr = allocate(alloc_purpose, word_sz); | |
4738 #ifndef PRODUCT | |
4739 // Should this evacuation fail? | |
4740 if (_g1h->evacuation_should_fail()) { | |
4741 if (obj_ptr != NULL) { | |
4742 undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
4743 obj_ptr = NULL; | |
4744 } | |
4745 } | |
4746 #endif // !PRODUCT | |
4747 | |
4748 if (obj_ptr == NULL) { | |
4749 // This will either forward-to-self, or detect that someone else has | |
4750 // installed a forwarding pointer. | |
4751 return _g1h->handle_evacuation_failure_par(this, old); | |
4752 } | |
4753 | |
4754 oop obj = oop(obj_ptr); | |
4755 | |
4756 // We're going to allocate linearly, so might as well prefetch ahead. | |
4757 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
4758 | |
4759 oop forward_ptr = old->forward_to_atomic(obj); | |
4760 if (forward_ptr == NULL) { | |
4761 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
4762 | |
4763 // alloc_purpose is just a hint to allocate() above, recheck the type of region | |
4764 // we actually allocated from and update alloc_purpose accordingly | |
4765 HeapRegion* to_region = _g1h->heap_region_containing_raw(obj_ptr); | |
4766 alloc_purpose = to_region->is_young() ? GCAllocForSurvived : GCAllocForTenured; | |
4767 | |
4768 if (g1p->track_object_age(alloc_purpose)) { | |
4769 // We could simply do obj->incr_age(). However, this causes a | |
4770 // performance issue. obj->incr_age() will first check whether | |
4771 // the object has a displaced mark by checking its mark word; | |
4772 // getting the mark word from the new location of the object | |
4773 // stalls. So, given that we already have the mark word and we | |
4774 // are about to install it anyway, it's better to increase the | |
4775 // age on the mark word, when the object does not have a | |
4776 // displaced mark word. We're not expecting many objects to have | |
4777 // a displaced marked word, so that case is not optimized | |
4778 // further (it could be...) and we simply call obj->incr_age(). | |
4779 | |
4780 if (m->has_displaced_mark_helper()) { | |
4781 // in this case, we have to install the mark word first, | |
4782 // otherwise obj looks to be forwarded (the old mark word, | |
4783 // which contains the forward pointer, was copied) | |
4784 obj->set_mark(m); | |
4785 obj->incr_age(); | |
4786 } else { | |
4787 m = m->incr_age(); | |
4788 obj->set_mark(m); | |
4789 } | |
4790 age_table()->add(obj, word_sz); | |
4791 } else { | |
4792 obj->set_mark(m); | |
4793 } | |
4794 | |
4795 if (G1StringDedup::is_enabled()) { | |
4796 G1StringDedup::enqueue_from_evacuation(from_region->is_young(), | |
4797 to_region->is_young(), | |
4798 queue_num(), | |
4799 obj); | |
4800 } | |
4801 | |
4802 size_t* surv_young_words = surviving_young_words(); | |
4803 surv_young_words[young_index] += word_sz; | |
4804 | |
4805 if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) { | |
4806 // We keep track of the next start index in the length field of | |
4807 // the to-space object. The actual length can be found in the | |
4808 // length field of the from-space object. | |
4809 arrayOop(obj)->set_length(0); | |
4810 oop* old_p = set_partial_array_mask(old); | |
4811 push_on_queue(old_p); | |
4812 } else { | |
4813 // No point in using the slower heap_region_containing() method, | |
4814 // given that we know obj is in the heap. | |
4815 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); | |
4816 obj->oop_iterate_backwards(&_scanner); | |
4817 } | |
4818 } else { | |
4819 undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
4820 obj = forward_ptr; | |
4821 } | |
4822 return obj; | |
4823 } | 4601 } |
4824 | 4602 |
4825 template <class T> | 4603 template <class T> |
4826 void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { | 4604 void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { |
4827 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { | 4605 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |