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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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