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src/hotspot/share/gc/g1/g1RemSet.hpp

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*** 45,55 **** class G1CMBitMap; class G1HotCardCache; class G1RemSetScanState; class G1ParScanThreadState; class G1Policy; ! class G1ScanCardClosure; class HeapRegionClaimer; // A G1RemSet in which each heap region has a rem set that records the // external heap references into it. Uses a mod ref bs to track updates, // so that they can be used to update the individual region remsets. --- 45,56 ---- class G1CMBitMap; class G1HotCardCache; class G1RemSetScanState; class G1ParScanThreadState; class G1Policy; ! class G1ScanObjsDuringScanRSClosure; ! class G1ScanObjsDuringUpdateRSClosure; class HeapRegionClaimer; // A G1RemSet in which each heap region has a rem set that records the // external heap references into it. Uses a mod ref bs to track updates, // so that they can be used to update the individual region remsets.
*** 57,66 **** --- 58,75 ---- private: G1RemSetScanState* _scan_state; G1RemSetSummary _prev_period_summary; + // Scan all remembered sets of the collection set for references into the collection + // set. + void scan_rem_set(G1ParScanThreadState* pss, uint worker_i); + + // Flush remaining refinement buffers for cross-region references to either evacuate references + // into the collection set or update the remembered set. + void update_rem_set(G1ParScanThreadState* pss, uint worker_i); + G1CollectedHeap* _g1h; size_t _num_conc_refined_cards; // Number of cards refined concurrently to the mutator. G1CardTable* _ct; G1Policy* _g1p;
*** 82,111 **** G1RemSet(G1CollectedHeap* g1h, G1CardTable* ct, G1HotCardCache* hot_card_cache); ~G1RemSet(); ! // Scan all remembered sets of the collection set for references into the collection ! // set. // Further applies heap_region_codeblobs on the oops of the unmarked nmethods on the strong code // roots list for each region in the collection set. ! void scan_rem_set(G1ParScanThreadState* pss, ! uint worker_i, ! G1GCPhaseTimes::GCParPhases scan_phase, ! G1GCPhaseTimes::GCParPhases objcopy_phase, ! G1GCPhaseTimes::GCParPhases coderoots_phase); ! // Flush remaining refinement buffers for cross-region references to either evacuate references ! // into the collection set or update the remembered set. ! void update_rem_set(G1ParScanThreadState* pss, uint worker_i); ! ! // Prepare for and cleanup after scanning the remembered sets. Must be called ! // once before and after in sequential code. ! void prepare_for_scan_rem_set(); ! void cleanup_after_scan_rem_set(); ! // Prepares the given region for remembered set scanning. ! void prepare_for_scan_rem_set(uint region_idx); G1RemSetScanState* scan_state() const { return _scan_state; } // Refine the card corresponding to "card_ptr". Safe to be called concurrently // to the mutator. --- 91,112 ---- G1RemSet(G1CollectedHeap* g1h, G1CardTable* ct, G1HotCardCache* hot_card_cache); ~G1RemSet(); ! // Process all oops in the collection set from the cards in the refinement buffers and ! // remembered sets using pss. ! // // Further applies heap_region_codeblobs on the oops of the unmarked nmethods on the strong code // roots list for each region in the collection set. ! void oops_into_collection_set_do(G1ParScanThreadState* pss, uint worker_i); ! // Prepare for and cleanup after an oops_into_collection_set_do ! // call. Must call each of these once before and after (in sequential ! // code) any thread calls oops_into_collection_set_do. ! void prepare_for_oops_into_collection_set_do(); ! void cleanup_after_oops_into_collection_set_do(); G1RemSetScanState* scan_state() const { return _scan_state; } // Refine the card corresponding to "card_ptr". Safe to be called concurrently // to the mutator.
*** 113,123 **** uint worker_i); // Refine the card corresponding to "card_ptr", applying the given closure to // all references found. Must only be called during gc. // Returns whether the card has been scanned. ! bool refine_card_during_gc(CardValue* card_ptr, G1ScanCardClosure* update_rs_cl); // Print accumulated summary info from the start of the VM. void print_summary_info(); // Print accumulated summary info from the last time called. --- 114,124 ---- uint worker_i); // Refine the card corresponding to "card_ptr", applying the given closure to // all references found. Must only be called during gc. // Returns whether the card has been scanned. ! bool refine_card_during_gc(CardValue* card_ptr, G1ScanObjsDuringUpdateRSClosure* update_rs_cl); // Print accumulated summary info from the start of the VM. void print_summary_info(); // Print accumulated summary info from the last time called.
*** 128,133 **** --- 129,182 ---- // Rebuilds the remembered set by scanning from bottom to TARS for all regions // using the given work gang. void rebuild_rem_set(G1ConcurrentMark* cm, WorkGang* workers, uint worker_id_offset); }; + class G1ScanRSForRegionClosure : public HeapRegionClosure { + G1CollectedHeap* _g1h; + G1CardTable *_ct; + + G1ParScanThreadState* _pss; + G1ScanObjsDuringScanRSClosure* _scan_objs_on_card_cl; + + G1RemSetScanState* _scan_state; + + G1GCPhaseTimes::GCParPhases _phase; + + uint _worker_i; + + size_t _cards_scanned; + size_t _cards_claimed; + size_t _cards_skipped; + + Tickspan _rem_set_root_scan_time; + Tickspan _rem_set_trim_partially_time; + + Tickspan _strong_code_root_scan_time; + Tickspan _strong_code_trim_partially_time; + + void claim_card(size_t card_index, const uint region_idx_for_card); + void scan_card(MemRegion mr, uint region_idx_for_card); + + void scan_rem_set_roots(HeapRegion* r); + void scan_strong_code_roots(HeapRegion* r); + public: + G1ScanRSForRegionClosure(G1RemSetScanState* scan_state, + G1ScanObjsDuringScanRSClosure* scan_obj_on_card, + G1ParScanThreadState* pss, + G1GCPhaseTimes::GCParPhases phase, + uint worker_i); + + bool do_heap_region(HeapRegion* r); + + Tickspan rem_set_root_scan_time() const { return _rem_set_root_scan_time; } + Tickspan rem_set_trim_partially_time() const { return _rem_set_trim_partially_time; } + + Tickspan strong_code_root_scan_time() const { return _strong_code_root_scan_time; } + Tickspan strong_code_root_trim_partially_time() const { return _strong_code_trim_partially_time; } + + size_t cards_scanned() const { return _cards_scanned; } + size_t cards_claimed() const { return _cards_claimed; } + size_t cards_skipped() const { return _cards_skipped; } + }; + #endif // SHARE_GC_G1_G1REMSET_HPP
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