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src/share/vm/gc/g1/g1CollectionSet.hpp

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rev 11552 : imported patch 8159978-collection-set-as-array
rev 11553 : imported patch 8159978-erikh-review
rev 11554 : imported patch 8159978-jmasa-review

*** 45,58 **** uint _eden_region_length; uint _survivor_region_length; uint _old_region_length; ! // The head of the list (via "next_in_collection_set()") representing the ! // current collection set. Set from the incrementally built collection ! // set at the start of the pause. ! HeapRegion* _head; // The number of bytes in the collection set before the pause. Set from // the incrementally built collection set at the start of an evacuation // pause, and incremented in finalize_old_part() when adding old regions // (if any) to the collection set. --- 45,63 ---- uint _eden_region_length; uint _survivor_region_length; uint _old_region_length; ! // The actual collection set as a set of region indices. ! // All entries in _collection_set_regions below _collection_set_cur_length are ! // assumed to be valid entries. ! // We assume that at any time there is at most only one writer and (one or more) ! // concurrent readers. This means we are good with using storestore and loadload ! // barriers on the writer and reader respectively only. ! uint* _collection_set_regions; ! volatile size_t _collection_set_cur_length; ! size_t _collection_set_max_length; // The number of bytes in the collection set before the pause. Set from // the incrementally built collection set at the start of an evacuation // pause, and incremented in finalize_old_part() when adding old regions // (if any) to the collection set.
*** 69,84 **** Inactive // We are not actively building the collection set }; CSetBuildType _inc_build_state; - // The head of the incrementally built collection set. - HeapRegion* _inc_head; - - // The tail of the incrementally built collection set. - HeapRegion* _inc_tail; - // The number of bytes in the incrementally built collection set. // Used to set _collection_set_bytes_used_before at the start of // an evacuation pause. size_t _inc_bytes_used_before; --- 74,83 ----
*** 103,124 **** double _inc_predicted_elapsed_time_ms; // See the comment for _inc_recorded_rs_lengths_diffs. double _inc_predicted_elapsed_time_ms_diffs; - uint _inc_region_length; - G1CollectorState* collector_state(); G1GCPhaseTimes* phase_times(); double predict_region_elapsed_time_ms(HeapRegion* hr); void verify_young_cset_indices() const NOT_DEBUG_RETURN; public: G1CollectionSet(G1CollectedHeap* g1h, G1Policy* policy); ~G1CollectionSet(); CollectionSetChooser* cset_chooser(); void init_region_lengths(uint eden_cset_region_length, uint survivor_cset_region_length); --- 102,124 ---- double _inc_predicted_elapsed_time_ms; // See the comment for _inc_recorded_rs_lengths_diffs. double _inc_predicted_elapsed_time_ms_diffs; G1CollectorState* collector_state(); G1GCPhaseTimes* phase_times(); double predict_region_elapsed_time_ms(HeapRegion* hr); void verify_young_cset_indices() const NOT_DEBUG_RETURN; public: G1CollectionSet(G1CollectedHeap* g1h, G1Policy* policy); ~G1CollectionSet(); + // Initializes the collection set giving the maximum possible length of the collection set. + void initialize(uint max_region_length); + CollectionSetChooser* cset_chooser(); void init_region_lengths(uint eden_cset_region_length, uint survivor_cset_region_length);
*** 131,169 **** uint eden_region_length() const { return _eden_region_length; } uint survivor_region_length() const { return _survivor_region_length; } uint old_region_length() const { return _old_region_length; } ! // Incremental CSet Support ! ! // The head of the incrementally built collection set. ! HeapRegion* inc_head() { return _inc_head; } ! ! // The tail of the incrementally built collection set. ! HeapRegion* inc_tail() { return _inc_tail; } // Initialize incremental collection set info. void start_incremental_building(); ! // Perform any final calculations on the incremental CSet fields // before we can use them. void finalize_incremental_building(); ! void clear_incremental() { ! _inc_head = NULL; ! _inc_tail = NULL; ! _inc_region_length = 0; ! } ! ! // Stop adding regions to the incremental collection set ! void stop_incremental_building() { _inc_build_state = Inactive; } ! // The head of the list (via "next_in_collection_set()") representing the ! // current collection set. ! HeapRegion* head() { return _head; } ! void clear_head() { _head = NULL; } size_t recorded_rs_lengths() { return _recorded_rs_lengths; } size_t bytes_used_before() const { return _bytes_used_before; --- 131,164 ---- uint eden_region_length() const { return _eden_region_length; } uint survivor_region_length() const { return _survivor_region_length; } uint old_region_length() const { return _old_region_length; } ! // Incremental collection set support // Initialize incremental collection set info. void start_incremental_building(); ! // Perform any final calculations on the incremental collection set fields // before we can use them. void finalize_incremental_building(); ! // Reset the contents of the collection set. ! void clear(); ! // Iterate over the collection set, applying the given HeapRegionClosure on all of them. ! // If may_be_aborted is true, iteration may be aborted using the return value of the ! // called closure method. ! void iterate(HeapRegionClosure* cl) const; ! ! // Iterate over the collection set, applying the given HeapRegionClosure on all of them, ! // trying to optimally spread out starting position of total_workers workers given the ! // caller's worker_id. ! void iterate_from(HeapRegionClosure* cl, uint worker_id, uint total_workers) const; ! // Stop adding regions to the incremental collection set. ! void stop_incremental_building() { _inc_build_state = Inactive; } size_t recorded_rs_lengths() { return _recorded_rs_lengths; } size_t bytes_used_before() const { return _bytes_used_before;
*** 172,207 **** void reset_bytes_used_before() { _bytes_used_before = 0; } // Choose a new collection set. Marks the chosen regions as being ! // "in_collection_set", and links them together. The head and number of ! // the collection set are available via access methods. double finalize_young_part(double target_pause_time_ms, G1SurvivorRegions* survivors); void finalize_old_part(double time_remaining_ms); ! // Add old region "hr" to the CSet. void add_old_region(HeapRegion* hr); // Update information about hr in the aggregated information for // the incrementally built collection set. void update_young_region_prediction(HeapRegion* hr, size_t new_rs_length); ! // Add hr to the LHS of the incremental collection set. void add_eden_region(HeapRegion* hr); ! // Add hr to the RHS of the incremental collection set. void add_survivor_regions(HeapRegion* hr); #ifndef PRODUCT ! void print(HeapRegion* list_head, outputStream* st); #endif // !PRODUCT private: ! // Update the incremental cset information when adding a region ! // (should not be called directly). void add_young_region_common(HeapRegion* hr); - }; #endif // SHARE_VM_GC_G1_G1COLLECTIONSET_HPP --- 167,201 ---- void reset_bytes_used_before() { _bytes_used_before = 0; } // Choose a new collection set. Marks the chosen regions as being ! // "in_collection_set". double finalize_young_part(double target_pause_time_ms, G1SurvivorRegions* survivors); void finalize_old_part(double time_remaining_ms); ! // Add old region "hr" to the collection set. void add_old_region(HeapRegion* hr); // Update information about hr in the aggregated information for // the incrementally built collection set. void update_young_region_prediction(HeapRegion* hr, size_t new_rs_length); ! // Add eden region to the collection set. void add_eden_region(HeapRegion* hr); ! // Add survivor region to the collection set. void add_survivor_regions(HeapRegion* hr); #ifndef PRODUCT ! bool verify_young_ages(); ! ! void print(outputStream* st); #endif // !PRODUCT private: ! // Update the incremental collection set information when adding a region. void add_young_region_common(HeapRegion* hr); }; #endif // SHARE_VM_GC_G1_G1COLLECTIONSET_HPP
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