Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/gc_implementation/g1/g1RemSet.cpp
src/share/vm/gc_implementation/g1/g1RemSet.cpp
- changeset 3296
- dc467e8b2c5e
- parent 3294
- bca17e38de00
- child 3357
- 441e946dc1af
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| 3295:00dd86e542eb | 3296:dc467e8b2c5e |
|---|---|
| 207 } | 207 } |
| 208 size_t cards_done() { return _cards_done;} | 208 size_t cards_done() { return _cards_done;} |
| 209 size_t cards_looked_up() { return _cards;} | 209 size_t cards_looked_up() { return _cards;} |
| 210 }; | 210 }; |
| 211 | 211 |
| 212 // We want the parallel threads to start their scanning at | |
| 213 // different collection set regions to avoid contention. | |
| 214 // If we have: | |
| 215 // n collection set regions | |
| 216 // p threads | |
| 217 // Then thread t will start at region t * floor (n/p) | |
| 218 | |
| 219 HeapRegion* G1RemSet::calculateStartRegion(int worker_i) { | |
| 220 HeapRegion* result = _g1p->collection_set(); | |
| 221 if (G1CollectedHeap::use_parallel_gc_threads()) { | |
| 222 size_t cs_size = _g1p->cset_region_length(); | |
| 223 int n_workers = _g1->workers()->total_workers(); | |
| 224 size_t cs_spans = cs_size / n_workers; | |
| 225 size_t ind = cs_spans * worker_i; | |
| 226 for (size_t i = 0; i < ind; i++) | |
| 227 result = result->next_in_collection_set(); | |
| 228 } | |
| 229 return result; | |
| 230 } | |
| 231 | |
| 232 void G1RemSet::scanRS(OopsInHeapRegionClosure* oc, int worker_i) { | 212 void G1RemSet::scanRS(OopsInHeapRegionClosure* oc, int worker_i) { |
| 233 double rs_time_start = os::elapsedTime(); | 213 double rs_time_start = os::elapsedTime(); |
| 234 HeapRegion *startRegion = calculateStartRegion(worker_i); | 214 HeapRegion *startRegion = _g1->start_cset_region_for_worker(worker_i); |
| 235 | 215 |
| 236 ScanRSClosure scanRScl(oc, worker_i); | 216 ScanRSClosure scanRScl(oc, worker_i); |
| 237 | 217 |
| 238 _g1->collection_set_iterate_from(startRegion, &scanRScl); | 218 _g1->collection_set_iterate_from(startRegion, &scanRScl); |
| 239 scanRScl.set_try_claimed(); | 219 scanRScl.set_try_claimed(); |
