| /* |
| * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "gc/g1/concurrentG1Refine.hpp" |
| #include "gc/g1/concurrentG1RefineThread.hpp" |
| #include "gc/g1/dirtyCardQueue.hpp" |
| #include "gc/g1/g1BlockOffsetTable.inline.hpp" |
| #include "gc/g1/g1CollectedHeap.inline.hpp" |
| #include "gc/g1/g1CollectorPolicy.hpp" |
| #include "gc/g1/g1FromCardCache.hpp" |
| #include "gc/g1/g1GCPhaseTimes.hpp" |
| #include "gc/g1/g1HotCardCache.hpp" |
| #include "gc/g1/g1OopClosures.inline.hpp" |
| #include "gc/g1/g1RemSet.inline.hpp" |
| #include "gc/g1/g1SATBCardTableModRefBS.inline.hpp" |
| #include "gc/g1/heapRegion.inline.hpp" |
| #include "gc/g1/heapRegionManager.inline.hpp" |
| #include "gc/g1/heapRegionRemSet.hpp" |
| #include "memory/iterator.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| #include "utilities/intHisto.hpp" |
| #include "utilities/stack.inline.hpp" |
| |
| G1RemSet::G1RemSet(G1CollectedHeap* g1, CardTableModRefBS* ct_bs) : |
| _g1(g1), |
| _conc_refine_cards(0), |
| _ct_bs(ct_bs), |
| _g1p(_g1->g1_policy()), |
| _cg1r(g1->concurrent_g1_refine()), |
| _cset_rs_update_cl(NULL), |
| _prev_period_summary(), |
| _into_cset_dirty_card_queue_set(false) |
| { |
| _cset_rs_update_cl = NEW_C_HEAP_ARRAY(G1ParPushHeapRSClosure*, n_workers(), mtGC); |
| for (uint i = 0; i < n_workers(); i++) { |
| _cset_rs_update_cl[i] = NULL; |
| } |
| if (log_is_enabled(Trace, gc, remset)) { |
| _prev_period_summary.initialize(this); |
| } |
| // Initialize the card queue set used to hold cards containing |
| // references into the collection set. |
| _into_cset_dirty_card_queue_set.initialize(NULL, // Should never be called by the Java code |
| DirtyCardQ_CBL_mon, |
| DirtyCardQ_FL_lock, |
| -1, // never trigger processing |
| -1, // no limit on length |
| Shared_DirtyCardQ_lock, |
| &JavaThread::dirty_card_queue_set()); |
| } |
| |
| G1RemSet::~G1RemSet() { |
| for (uint i = 0; i < n_workers(); i++) { |
| assert(_cset_rs_update_cl[i] == NULL, "it should be"); |
| } |
| FREE_C_HEAP_ARRAY(G1ParPushHeapRSClosure*, _cset_rs_update_cl); |
| } |
| |
| uint G1RemSet::num_par_rem_sets() { |
| return MAX2(DirtyCardQueueSet::num_par_ids() + ConcurrentG1Refine::thread_num(), ParallelGCThreads); |
| } |
| |
| void G1RemSet::initialize(uint max_regions) { |
| G1FromCardCache::initialize(num_par_rem_sets(), max_regions); |
| } |
| |
| ScanRSClosure::ScanRSClosure(G1ParPushHeapRSClosure* oc, |
| CodeBlobClosure* code_root_cl, |
| uint worker_i) : |
| _oc(oc), |
| _code_root_cl(code_root_cl), |
| _strong_code_root_scan_time_sec(0.0), |
| _cards(0), |
| _cards_done(0), |
| _worker_i(worker_i), |
| _try_claimed(false) { |
| _g1h = G1CollectedHeap::heap(); |
| _bot = _g1h->bot(); |
| _ct_bs = _g1h->g1_barrier_set(); |
| _block_size = MAX2<size_t>(G1RSetScanBlockSize, 1); |
| } |
| |
| void ScanRSClosure::scanCard(size_t index, HeapRegion *r) { |
| // Stack allocate the DirtyCardToOopClosure instance |
| HeapRegionDCTOC cl(_g1h, r, _oc, |
| CardTableModRefBS::Precise); |
| |
| // Set the "from" region in the closure. |
| _oc->set_region(r); |
| MemRegion card_region(_bot->address_for_index(index), BOTConstants::N_words); |
| MemRegion pre_gc_allocated(r->bottom(), r->scan_top()); |
| MemRegion mr = pre_gc_allocated.intersection(card_region); |
| if (!mr.is_empty() && !_ct_bs->is_card_claimed(index)) { |
| // We make the card as "claimed" lazily (so races are possible |
| // but they're benign), which reduces the number of duplicate |
| // scans (the rsets of the regions in the cset can intersect). |
| _ct_bs->set_card_claimed(index); |
| _cards_done++; |
| cl.do_MemRegion(mr); |
| } |
| } |
| |
| void ScanRSClosure::scan_strong_code_roots(HeapRegion* r) { |
| double scan_start = os::elapsedTime(); |
| r->strong_code_roots_do(_code_root_cl); |
| _strong_code_root_scan_time_sec += (os::elapsedTime() - scan_start); |
| } |
| |
| bool ScanRSClosure::doHeapRegion(HeapRegion* r) { |
| assert(r->in_collection_set(), "should only be called on elements of CS."); |
| HeapRegionRemSet* hrrs = r->rem_set(); |
| if (hrrs->iter_is_complete()) return false; // All done. |
| if (!_try_claimed && !hrrs->claim_iter()) return false; |
| // If we ever free the collection set concurrently, we should also |
| // clear the card table concurrently therefore we won't need to |
| // add regions of the collection set to the dirty cards region. |
| _g1h->push_dirty_cards_region(r); |
| // If we didn't return above, then |
| // _try_claimed || r->claim_iter() |
| // is true: either we're supposed to work on claimed-but-not-complete |
| // regions, or we successfully claimed the region. |
| |
| HeapRegionRemSetIterator iter(hrrs); |
| size_t card_index; |
| |
| // We claim cards in block so as to reduce the contention. The block size is determined by |
| // the G1RSetScanBlockSize parameter. |
| size_t jump_to_card = hrrs->iter_claimed_next(_block_size); |
| for (size_t current_card = 0; iter.has_next(card_index); current_card++) { |
| if (current_card >= jump_to_card + _block_size) { |
| jump_to_card = hrrs->iter_claimed_next(_block_size); |
| } |
| if (current_card < jump_to_card) continue; |
| HeapWord* card_start = _g1h->bot()->address_for_index(card_index); |
| |
| HeapRegion* card_region = _g1h->heap_region_containing(card_start); |
| _cards++; |
| |
| if (!card_region->is_on_dirty_cards_region_list()) { |
| _g1h->push_dirty_cards_region(card_region); |
| } |
| |
| // If the card is dirty, then we will scan it during updateRS. |
| if (!card_region->in_collection_set() && |
| !_ct_bs->is_card_dirty(card_index)) { |
| scanCard(card_index, card_region); |
| } |
| } |
| if (!_try_claimed) { |
| // Scan the strong code root list attached to the current region |
| scan_strong_code_roots(r); |
| |
| hrrs->set_iter_complete(); |
| } |
| return false; |
| } |
| |
| size_t G1RemSet::scanRS(G1ParPushHeapRSClosure* oc, |
| CodeBlobClosure* heap_region_codeblobs, |
| uint worker_i) { |
| double rs_time_start = os::elapsedTime(); |
| |
| HeapRegion *startRegion = _g1->start_cset_region_for_worker(worker_i); |
| |
| ScanRSClosure scanRScl(oc, heap_region_codeblobs, worker_i); |
| |
| _g1->collection_set_iterate_from(startRegion, &scanRScl); |
| scanRScl.set_try_claimed(); |
| _g1->collection_set_iterate_from(startRegion, &scanRScl); |
| |
| double scan_rs_time_sec = (os::elapsedTime() - rs_time_start) |
| - scanRScl.strong_code_root_scan_time_sec(); |
| |
| _g1p->phase_times()->record_time_secs(G1GCPhaseTimes::ScanRS, worker_i, scan_rs_time_sec); |
| _g1p->phase_times()->record_time_secs(G1GCPhaseTimes::CodeRoots, worker_i, scanRScl.strong_code_root_scan_time_sec()); |
| |
| return scanRScl.cards_done(); |
| } |
| |
| // Closure used for updating RSets and recording references that |
| // point into the collection set. Only called during an |
| // evacuation pause. |
| |
| class RefineRecordRefsIntoCSCardTableEntryClosure: public CardTableEntryClosure { |
| G1RemSet* _g1rs; |
| DirtyCardQueue* _into_cset_dcq; |
| public: |
| RefineRecordRefsIntoCSCardTableEntryClosure(G1CollectedHeap* g1h, |
| DirtyCardQueue* into_cset_dcq) : |
| _g1rs(g1h->g1_rem_set()), _into_cset_dcq(into_cset_dcq) |
| {} |
| |
| bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
| // The only time we care about recording cards that |
| // contain references that point into the collection set |
| // is during RSet updating within an evacuation pause. |
| // In this case worker_i should be the id of a GC worker thread. |
| assert(SafepointSynchronize::is_at_safepoint(), "not during an evacuation pause"); |
| assert(worker_i < ParallelGCThreads, "should be a GC worker"); |
| |
| if (_g1rs->refine_card(card_ptr, worker_i, true)) { |
| // 'card_ptr' contains references that point into the collection |
| // set. We need to record the card in the DCQS |
| // (_into_cset_dirty_card_queue_set) |
| // that's used for that purpose. |
| // |
| // Enqueue the card |
| _into_cset_dcq->enqueue(card_ptr); |
| } |
| return true; |
| } |
| }; |
| |
| void G1RemSet::updateRS(DirtyCardQueue* into_cset_dcq, uint worker_i) { |
| RefineRecordRefsIntoCSCardTableEntryClosure into_cset_update_rs_cl(_g1, into_cset_dcq); |
| |
| G1GCParPhaseTimesTracker x(_g1p->phase_times(), G1GCPhaseTimes::UpdateRS, worker_i); |
| if (ConcurrentG1Refine::hot_card_cache_enabled()) { |
| // Apply the closure to the entries of the hot card cache. |
| G1GCParPhaseTimesTracker y(_g1p->phase_times(), G1GCPhaseTimes::ScanHCC, worker_i); |
| _g1->iterate_hcc_closure(&into_cset_update_rs_cl, worker_i); |
| } |
| // Apply the closure to all remaining log entries. |
| _g1->iterate_dirty_card_closure(&into_cset_update_rs_cl, worker_i); |
| } |
| |
| void G1RemSet::cleanupHRRS() { |
| HeapRegionRemSet::cleanup(); |
| } |
| |
| size_t G1RemSet::oops_into_collection_set_do(G1ParPushHeapRSClosure* oc, |
| CodeBlobClosure* heap_region_codeblobs, |
| uint worker_i) { |
| // We cache the value of 'oc' closure into the appropriate slot in the |
| // _cset_rs_update_cl for this worker |
| assert(worker_i < n_workers(), "sanity"); |
| _cset_rs_update_cl[worker_i] = oc; |
| |
| // A DirtyCardQueue that is used to hold cards containing references |
| // that point into the collection set. This DCQ is associated with a |
| // special DirtyCardQueueSet (see g1CollectedHeap.hpp). Under normal |
| // circumstances (i.e. the pause successfully completes), these cards |
| // are just discarded (there's no need to update the RSets of regions |
| // that were in the collection set - after the pause these regions |
| // are wholly 'free' of live objects. In the event of an evacuation |
| // failure the cards/buffers in this queue set are passed to the |
| // DirtyCardQueueSet that is used to manage RSet updates |
| DirtyCardQueue into_cset_dcq(&_into_cset_dirty_card_queue_set); |
| |
| updateRS(&into_cset_dcq, worker_i); |
| size_t cards_scanned = scanRS(oc, heap_region_codeblobs, worker_i); |
| |
| // We now clear the cached values of _cset_rs_update_cl for this worker |
| _cset_rs_update_cl[worker_i] = NULL; |
| return cards_scanned; |
| } |
| |
| void G1RemSet::prepare_for_oops_into_collection_set_do() { |
| _g1->set_refine_cte_cl_concurrency(false); |
| DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| dcqs.concatenate_logs(); |
| } |
| |
| void G1RemSet::cleanup_after_oops_into_collection_set_do() { |
| // Cleanup after copy |
| _g1->set_refine_cte_cl_concurrency(true); |
| // Set all cards back to clean. |
| _g1->cleanUpCardTable(); |
| |
| DirtyCardQueueSet& into_cset_dcqs = _into_cset_dirty_card_queue_set; |
| |
| if (_g1->evacuation_failed()) { |
| double restore_remembered_set_start = os::elapsedTime(); |
| |
| // Restore remembered sets for the regions pointing into the collection set. |
| // We just need to transfer the completed buffers from the DirtyCardQueueSet |
| // used to hold cards that contain references that point into the collection set |
| // to the DCQS used to hold the deferred RS updates. |
| _g1->dirty_card_queue_set().merge_bufferlists(&into_cset_dcqs); |
| _g1->g1_policy()->phase_times()->record_evac_fail_restore_remsets((os::elapsedTime() - restore_remembered_set_start) * 1000.0); |
| } |
| |
| // Free any completed buffers in the DirtyCardQueueSet used to hold cards |
| // which contain references that point into the collection. |
| _into_cset_dirty_card_queue_set.clear(); |
| assert(_into_cset_dirty_card_queue_set.completed_buffers_num() == 0, |
| "all buffers should be freed"); |
| _into_cset_dirty_card_queue_set.clear_n_completed_buffers(); |
| } |
| |
| class ScrubRSClosure: public HeapRegionClosure { |
| G1CollectedHeap* _g1h; |
| BitMap* _region_bm; |
| BitMap* _card_bm; |
| CardTableModRefBS* _ctbs; |
| public: |
| ScrubRSClosure(BitMap* region_bm, BitMap* card_bm) : |
| _g1h(G1CollectedHeap::heap()), |
| _region_bm(region_bm), _card_bm(card_bm), |
| _ctbs(_g1h->g1_barrier_set()) {} |
| |
| bool doHeapRegion(HeapRegion* r) { |
| if (!r->is_continues_humongous()) { |
| r->rem_set()->scrub(_ctbs, _region_bm, _card_bm); |
| } |
| return false; |
| } |
| }; |
| |
| void G1RemSet::scrub(BitMap* region_bm, BitMap* card_bm, uint worker_num, HeapRegionClaimer *hrclaimer) { |
| ScrubRSClosure scrub_cl(region_bm, card_bm); |
| _g1->heap_region_par_iterate(&scrub_cl, worker_num, hrclaimer); |
| } |
| |
| G1TriggerClosure::G1TriggerClosure() : |
| _triggered(false) { } |
| |
| G1InvokeIfNotTriggeredClosure::G1InvokeIfNotTriggeredClosure(G1TriggerClosure* t_cl, |
| OopClosure* oop_cl) : |
| _trigger_cl(t_cl), _oop_cl(oop_cl) { } |
| |
| G1Mux2Closure::G1Mux2Closure(OopClosure *c1, OopClosure *c2) : |
| _c1(c1), _c2(c2) { } |
| |
| G1UpdateRSOrPushRefOopClosure:: |
| G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h, |
| G1RemSet* rs, |
| G1ParPushHeapRSClosure* push_ref_cl, |
| bool record_refs_into_cset, |
| uint worker_i) : |
| _g1(g1h), _g1_rem_set(rs), _from(NULL), |
| _record_refs_into_cset(record_refs_into_cset), |
| _push_ref_cl(push_ref_cl), _worker_i(worker_i) { } |
| |
| // Returns true if the given card contains references that point |
| // into the collection set, if we're checking for such references; |
| // false otherwise. |
| |
| bool G1RemSet::refine_card(jbyte* card_ptr, uint worker_i, |
| bool check_for_refs_into_cset) { |
| assert(_g1->is_in_exact(_ct_bs->addr_for(card_ptr)), |
| "Card at " PTR_FORMAT " index " SIZE_FORMAT " representing heap at " PTR_FORMAT " (%u) must be in committed heap", |
| p2i(card_ptr), |
| _ct_bs->index_for(_ct_bs->addr_for(card_ptr)), |
| p2i(_ct_bs->addr_for(card_ptr)), |
| _g1->addr_to_region(_ct_bs->addr_for(card_ptr))); |
| |
| // If the card is no longer dirty, nothing to do. |
| if (*card_ptr != CardTableModRefBS::dirty_card_val()) { |
| // No need to return that this card contains refs that point |
| // into the collection set. |
| return false; |
| } |
| |
| // Construct the region representing the card. |
| HeapWord* start = _ct_bs->addr_for(card_ptr); |
| // And find the region containing it. |
| HeapRegion* r = _g1->heap_region_containing(start); |
| |
| // Why do we have to check here whether a card is on a young region, |
| // given that we dirty young regions and, as a result, the |
| // post-barrier is supposed to filter them out and never to enqueue |
| // them? When we allocate a new region as the "allocation region" we |
| // actually dirty its cards after we release the lock, since card |
| // dirtying while holding the lock was a performance bottleneck. So, |
| // as a result, it is possible for other threads to actually |
| // allocate objects in the region (after the acquire the lock) |
| // before all the cards on the region are dirtied. This is unlikely, |
| // and it doesn't happen often, but it can happen. So, the extra |
| // check below filters out those cards. |
| if (r->is_young()) { |
| return false; |
| } |
| |
| // While we are processing RSet buffers during the collection, we |
| // actually don't want to scan any cards on the collection set, |
| // since we don't want to update remembered sets with entries that |
| // point into the collection set, given that live objects from the |
| // collection set are about to move and such entries will be stale |
| // very soon. This change also deals with a reliability issue which |
| // involves scanning a card in the collection set and coming across |
| // an array that was being chunked and looking malformed. Note, |
| // however, that if evacuation fails, we have to scan any objects |
| // that were not moved and create any missing entries. |
| if (r->in_collection_set()) { |
| return false; |
| } |
| |
| // The result from the hot card cache insert call is either: |
| // * pointer to the current card |
| // (implying that the current card is not 'hot'), |
| // * null |
| // (meaning we had inserted the card ptr into the "hot" card cache, |
| // which had some headroom), |
| // * a pointer to a "hot" card that was evicted from the "hot" cache. |
| // |
| |
| G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
| if (hot_card_cache->use_cache()) { |
| assert(!check_for_refs_into_cset, "sanity"); |
| assert(!SafepointSynchronize::is_at_safepoint(), "sanity"); |
| |
| card_ptr = hot_card_cache->insert(card_ptr); |
| if (card_ptr == NULL) { |
| // There was no eviction. Nothing to do. |
| return false; |
| } |
| |
| start = _ct_bs->addr_for(card_ptr); |
| r = _g1->heap_region_containing(start); |
| |
| // Checking whether the region we got back from the cache |
| // is young here is inappropriate. The region could have been |
| // freed, reallocated and tagged as young while in the cache. |
| // Hence we could see its young type change at any time. |
| } |
| |
| // Don't use addr_for(card_ptr + 1) which can ask for |
| // a card beyond the heap. This is not safe without a perm |
| // gen at the upper end of the heap. |
| HeapWord* end = start + CardTableModRefBS::card_size_in_words; |
| MemRegion dirtyRegion(start, end); |
| |
| G1ParPushHeapRSClosure* oops_in_heap_closure = NULL; |
| if (check_for_refs_into_cset) { |
| // ConcurrentG1RefineThreads have worker numbers larger than what |
| // _cset_rs_update_cl[] is set up to handle. But those threads should |
| // only be active outside of a collection which means that when they |
| // reach here they should have check_for_refs_into_cset == false. |
| assert((size_t)worker_i < n_workers(), "index of worker larger than _cset_rs_update_cl[].length"); |
| oops_in_heap_closure = _cset_rs_update_cl[worker_i]; |
| } |
| G1UpdateRSOrPushRefOopClosure update_rs_oop_cl(_g1, |
| _g1->g1_rem_set(), |
| oops_in_heap_closure, |
| check_for_refs_into_cset, |
| worker_i); |
| update_rs_oop_cl.set_from(r); |
| |
| G1TriggerClosure trigger_cl; |
| FilterIntoCSClosure into_cs_cl(_g1, &trigger_cl); |
| G1InvokeIfNotTriggeredClosure invoke_cl(&trigger_cl, &into_cs_cl); |
| G1Mux2Closure mux(&invoke_cl, &update_rs_oop_cl); |
| |
| FilterOutOfRegionClosure filter_then_update_rs_oop_cl(r, |
| (check_for_refs_into_cset ? |
| (OopClosure*)&mux : |
| (OopClosure*)&update_rs_oop_cl)); |
| |
| // The region for the current card may be a young region. The |
| // current card may have been a card that was evicted from the |
| // card cache. When the card was inserted into the cache, we had |
| // determined that its region was non-young. While in the cache, |
| // the region may have been freed during a cleanup pause, reallocated |
| // and tagged as young. |
| // |
| // We wish to filter out cards for such a region but the current |
| // thread, if we're running concurrently, may "see" the young type |
| // change at any time (so an earlier "is_young" check may pass or |
| // fail arbitrarily). We tell the iteration code to perform this |
| // filtering when it has been determined that there has been an actual |
| // allocation in this region and making it safe to check the young type. |
| bool filter_young = true; |
| |
| HeapWord* stop_point = |
| r->oops_on_card_seq_iterate_careful(dirtyRegion, |
| &filter_then_update_rs_oop_cl, |
| filter_young, |
| card_ptr); |
| |
| // If stop_point is non-null, then we encountered an unallocated region |
| // (perhaps the unfilled portion of a TLAB.) For now, we'll dirty the |
| // card and re-enqueue: if we put off the card until a GC pause, then the |
| // unallocated portion will be filled in. Alternatively, we might try |
| // the full complexity of the technique used in "regular" precleaning. |
| if (stop_point != NULL) { |
| // The card might have gotten re-dirtied and re-enqueued while we |
| // worked. (In fact, it's pretty likely.) |
| if (*card_ptr != CardTableModRefBS::dirty_card_val()) { |
| *card_ptr = CardTableModRefBS::dirty_card_val(); |
| MutexLockerEx x(Shared_DirtyCardQ_lock, |
| Mutex::_no_safepoint_check_flag); |
| DirtyCardQueue* sdcq = |
| JavaThread::dirty_card_queue_set().shared_dirty_card_queue(); |
| sdcq->enqueue(card_ptr); |
| } |
| } else { |
| _conc_refine_cards++; |
| } |
| |
| // This gets set to true if the card being refined has |
| // references that point into the collection set. |
| bool has_refs_into_cset = trigger_cl.triggered(); |
| |
| // We should only be detecting that the card contains references |
| // that point into the collection set if the current thread is |
| // a GC worker thread. |
| assert(!has_refs_into_cset || SafepointSynchronize::is_at_safepoint(), |
| "invalid result at non safepoint"); |
| |
| return has_refs_into_cset; |
| } |
| |
| void G1RemSet::print_periodic_summary_info(const char* header, uint period_count) { |
| if ((G1SummarizeRSetStatsPeriod > 0) && log_is_enabled(Trace, gc, remset) && |
| (period_count % G1SummarizeRSetStatsPeriod == 0)) { |
| |
| if (!_prev_period_summary.initialized()) { |
| _prev_period_summary.initialize(this); |
| } |
| |
| G1RemSetSummary current; |
| current.initialize(this); |
| _prev_period_summary.subtract_from(¤t); |
| |
| LogHandle(gc, remset) log; |
| log.trace("%s", header); |
| ResourceMark rm; |
| _prev_period_summary.print_on(log.trace_stream()); |
| |
| _prev_period_summary.set(¤t); |
| } |
| } |
| |
| void G1RemSet::print_summary_info() { |
| LogHandle(gc, remset, exit) log; |
| if (log.is_trace()) { |
| log.trace(" Cumulative RS summary"); |
| G1RemSetSummary current; |
| current.initialize(this); |
| ResourceMark rm; |
| current.print_on(log.trace_stream()); |
| } |
| } |
| |
| void G1RemSet::prepare_for_verify() { |
| if (G1HRRSFlushLogBuffersOnVerify && |
| (VerifyBeforeGC || VerifyAfterGC) |
| && (!_g1->collector_state()->full_collection() || G1VerifyRSetsDuringFullGC)) { |
| cleanupHRRS(); |
| _g1->set_refine_cte_cl_concurrency(false); |
| if (SafepointSynchronize::is_at_safepoint()) { |
| DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| dcqs.concatenate_logs(); |
| } |
| |
| G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
| bool use_hot_card_cache = hot_card_cache->use_cache(); |
| hot_card_cache->set_use_cache(false); |
| |
| DirtyCardQueue into_cset_dcq(&_into_cset_dirty_card_queue_set); |
| updateRS(&into_cset_dcq, 0); |
| _into_cset_dirty_card_queue_set.clear(); |
| |
| hot_card_cache->set_use_cache(use_hot_card_cache); |
| assert(JavaThread::dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
| } |
| } |