231 };
232
233 void G1RemSet::scanRS(G1ParPushHeapRSClosure* oc,
234 CodeBlobClosure* code_root_cl,
235 uint worker_i) {
236 double rs_time_start = os::elapsedTime();
237 HeapRegion *startRegion = _g1->start_cset_region_for_worker(worker_i);
238
239 ScanRSClosure scanRScl(oc, code_root_cl, worker_i);
240
241 _g1->collection_set_iterate_from(startRegion, &scanRScl);
242 scanRScl.set_try_claimed();
243 _g1->collection_set_iterate_from(startRegion, &scanRScl);
244
245 double scan_rs_time_sec = (os::elapsedTime() - rs_time_start)
246 - scanRScl.strong_code_root_scan_time_sec();
247
248 assert(_cards_scanned != NULL, "invariant");
249 _cards_scanned[worker_i] = scanRScl.cards_done();
250
251 _g1p->phase_times()->record_scan_rs_time(worker_i, scan_rs_time_sec * 1000.0);
252 _g1p->phase_times()->record_strong_code_root_scan_time(worker_i,
253 scanRScl.strong_code_root_scan_time_sec() * 1000.0);
254 }
255
256 // Closure used for updating RSets and recording references that
257 // point into the collection set. Only called during an
258 // evacuation pause.
259
260 class RefineRecordRefsIntoCSCardTableEntryClosure: public CardTableEntryClosure {
261 G1RemSet* _g1rs;
262 DirtyCardQueue* _into_cset_dcq;
263 public:
264 RefineRecordRefsIntoCSCardTableEntryClosure(G1CollectedHeap* g1h,
265 DirtyCardQueue* into_cset_dcq) :
266 _g1rs(g1h->g1_rem_set()), _into_cset_dcq(into_cset_dcq)
267 {}
268 bool do_card_ptr(jbyte* card_ptr, uint worker_i) {
269 // The only time we care about recording cards that
270 // contain references that point into the collection set
271 // is during RSet updating within an evacuation pause.
272 // In this case worker_i should be the id of a GC worker thread.
273 assert(SafepointSynchronize::is_at_safepoint(), "not during an evacuation pause");
274 assert(worker_i < ParallelGCThreads, "should be a GC worker");
275
276 if (_g1rs->refine_card(card_ptr, worker_i, true)) {
277 // 'card_ptr' contains references that point into the collection
278 // set. We need to record the card in the DCQS
279 // (G1CollectedHeap::into_cset_dirty_card_queue_set())
280 // that's used for that purpose.
281 //
282 // Enqueue the card
283 _into_cset_dcq->enqueue(card_ptr);
284 }
285 return true;
286 }
287 };
288
289 void G1RemSet::updateRS(DirtyCardQueue* into_cset_dcq, uint worker_i) {
290 double start = os::elapsedTime();
291 // Apply the given closure to all remaining log entries.
292 RefineRecordRefsIntoCSCardTableEntryClosure into_cset_update_rs_cl(_g1, into_cset_dcq);
293
294 _g1->iterate_dirty_card_closure(&into_cset_update_rs_cl, into_cset_dcq, false, worker_i);
295
296 _g1p->phase_times()->record_update_rs_time(worker_i, (os::elapsedTime() - start) * 1000.0);
297 }
298
299 void G1RemSet::cleanupHRRS() {
300 HeapRegionRemSet::cleanup();
301 }
302
303 void G1RemSet::oops_into_collection_set_do(G1ParPushHeapRSClosure* oc,
304 CodeBlobClosure* code_root_cl,
305 uint worker_i) {
306 #if CARD_REPEAT_HISTO
307 ct_freq_update_histo_and_reset();
308 #endif
309
310 // We cache the value of 'oc' closure into the appropriate slot in the
311 // _cset_rs_update_cl for this worker
312 assert(worker_i < n_workers(), "sanity");
313 _cset_rs_update_cl[worker_i] = oc;
314
315 // A DirtyCardQueue that is used to hold cards containing references
316 // that point into the collection set. This DCQ is associated with a
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231 };
232
233 void G1RemSet::scanRS(G1ParPushHeapRSClosure* oc,
234 CodeBlobClosure* code_root_cl,
235 uint worker_i) {
236 double rs_time_start = os::elapsedTime();
237 HeapRegion *startRegion = _g1->start_cset_region_for_worker(worker_i);
238
239 ScanRSClosure scanRScl(oc, code_root_cl, worker_i);
240
241 _g1->collection_set_iterate_from(startRegion, &scanRScl);
242 scanRScl.set_try_claimed();
243 _g1->collection_set_iterate_from(startRegion, &scanRScl);
244
245 double scan_rs_time_sec = (os::elapsedTime() - rs_time_start)
246 - scanRScl.strong_code_root_scan_time_sec();
247
248 assert(_cards_scanned != NULL, "invariant");
249 _cards_scanned[worker_i] = scanRScl.cards_done();
250
251 _g1p->phase_times()->record_time_secs(G1GCPhaseTimes::ScanRS, worker_i, scan_rs_time_sec);
252 _g1p->phase_times()->record_time_secs(G1GCPhaseTimes::CodeRoots, worker_i, scanRScl.strong_code_root_scan_time_sec());
253 }
254
255 // Closure used for updating RSets and recording references that
256 // point into the collection set. Only called during an
257 // evacuation pause.
258
259 class RefineRecordRefsIntoCSCardTableEntryClosure: public CardTableEntryClosure {
260 G1RemSet* _g1rs;
261 DirtyCardQueue* _into_cset_dcq;
262 public:
263 RefineRecordRefsIntoCSCardTableEntryClosure(G1CollectedHeap* g1h,
264 DirtyCardQueue* into_cset_dcq) :
265 _g1rs(g1h->g1_rem_set()), _into_cset_dcq(into_cset_dcq)
266 {}
267 bool do_card_ptr(jbyte* card_ptr, uint worker_i) {
268 // The only time we care about recording cards that
269 // contain references that point into the collection set
270 // is during RSet updating within an evacuation pause.
271 // In this case worker_i should be the id of a GC worker thread.
272 assert(SafepointSynchronize::is_at_safepoint(), "not during an evacuation pause");
273 assert(worker_i < ParallelGCThreads, "should be a GC worker");
274
275 if (_g1rs->refine_card(card_ptr, worker_i, true)) {
276 // 'card_ptr' contains references that point into the collection
277 // set. We need to record the card in the DCQS
278 // (G1CollectedHeap::into_cset_dirty_card_queue_set())
279 // that's used for that purpose.
280 //
281 // Enqueue the card
282 _into_cset_dcq->enqueue(card_ptr);
283 }
284 return true;
285 }
286 };
287
288 void G1RemSet::updateRS(DirtyCardQueue* into_cset_dcq, uint worker_i) {
289 G1GCParPhaseTimesTracker x(_g1p->phase_times(), G1GCPhaseTimes::UpdateRS, worker_i);
290 // Apply the given closure to all remaining log entries.
291 RefineRecordRefsIntoCSCardTableEntryClosure into_cset_update_rs_cl(_g1, into_cset_dcq);
292
293 _g1->iterate_dirty_card_closure(&into_cset_update_rs_cl, into_cset_dcq, false, worker_i);
294 }
295
296 void G1RemSet::cleanupHRRS() {
297 HeapRegionRemSet::cleanup();
298 }
299
300 void G1RemSet::oops_into_collection_set_do(G1ParPushHeapRSClosure* oc,
301 CodeBlobClosure* code_root_cl,
302 uint worker_i) {
303 #if CARD_REPEAT_HISTO
304 ct_freq_update_histo_and_reset();
305 #endif
306
307 // We cache the value of 'oc' closure into the appropriate slot in the
308 // _cset_rs_update_cl for this worker
309 assert(worker_i < n_workers(), "sanity");
310 _cset_rs_update_cl[worker_i] = oc;
311
312 // A DirtyCardQueue that is used to hold cards containing references
313 // that point into the collection set. This DCQ is associated with a
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