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comparison src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp @ 1261:0414c1049f15

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6923991: G1: improve scalability of RSet scanning Summary: Implemented block-based work stealing. Moved copying during the rset scanning phase to the main copying phase. Made the size of rset table depend on the region size. Reviewed-by: apetrusenko, tonyp
author iveresov
date Thu, 11 Feb 2010 15:52:19 -0800
parents df6caf649ff7
children f9ec1e4bbb44
comparison
equal deleted inserted replaced
1260:8859772195c6 1261:0414c1049f15
185 // Clear entries for the current region in any rem sets named in 185 // Clear entries for the current region in any rem sets named in
186 // the _outgoing_region_map. 186 // the _outgoing_region_map.
187 void clear_outgoing_entries(); 187 void clear_outgoing_entries();
188 188
189 enum ParIterState { Unclaimed, Claimed, Complete }; 189 enum ParIterState { Unclaimed, Claimed, Complete };
190 ParIterState _iter_state; 190 volatile ParIterState _iter_state;
191 volatile jlong _iter_claimed;
191 192
192 // Unused unless G1RecordHRRSOops is true. 193 // Unused unless G1RecordHRRSOops is true.
193 194
194 static const int MaxRecorded = 1000000; 195 static const int MaxRecorded = 1000000;
195 static OopOrNarrowOopStar* _recorded_oops; 196 static OopOrNarrowOopStar* _recorded_oops;
207 public: 208 public:
208 HeapRegionRemSet(G1BlockOffsetSharedArray* bosa, 209 HeapRegionRemSet(G1BlockOffsetSharedArray* bosa,
209 HeapRegion* hr); 210 HeapRegion* hr);
210 211
211 static int num_par_rem_sets(); 212 static int num_par_rem_sets();
213 static void setup_remset_size();
212 214
213 HeapRegion* hr() const { 215 HeapRegion* hr() const {
214 return _other_regions.hr(); 216 return _other_regions.hr();
215 } 217 }
216 218
270 // Sets the iteration state to "complete". 272 // Sets the iteration state to "complete".
271 void set_iter_complete(); 273 void set_iter_complete();
272 // Returns "true" iff the region's iteration is complete. 274 // Returns "true" iff the region's iteration is complete.
273 bool iter_is_complete(); 275 bool iter_is_complete();
274 276
277 // Support for claiming blocks of cards during iteration
278 void set_iter_claimed(size_t x) { _iter_claimed = (jlong)x; }
279 size_t iter_claimed() const { return (size_t)_iter_claimed; }
280 // Claim the next block of cards
281 size_t iter_claimed_next(size_t step) {
282 size_t current, next;
283 do {
284 current = iter_claimed();
285 next = current + step;
286 } while (Atomic::cmpxchg((jlong)next, &_iter_claimed, (jlong)current) != (jlong)current);
287 return current;
288 }
289
275 // Initialize the given iterator to iterate over this rem set. 290 // Initialize the given iterator to iterate over this rem set.
276 void init_iterator(HeapRegionRemSetIterator* iter) const; 291 void init_iterator(HeapRegionRemSetIterator* iter) const;
277 292
278 #if 0 293 #if 0
279 // Apply the "do_card" method to the start address of every card in the 294 // Apply the "do_card" method to the start address of every card in the