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src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp

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 17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  *
 23  */
 24 
 25 #include "precompiled.hpp"
 26 #include "gc/g1/g1CollectedHeap.inline.hpp"
 27 #include "gc/g1/g1ConcurrentMarkBitMap.inline.hpp"
 28 #include "gc/g1/g1FullCollector.inline.hpp"
 29 #include "gc/g1/g1FullGCCompactionPoint.hpp"
 30 #include "gc/g1/g1FullGCMarker.hpp"
 31 #include "gc/g1/g1FullGCOopClosures.inline.hpp"
 32 #include "gc/g1/g1FullGCPrepareTask.inline.hpp"
 33 #include "gc/g1/g1HotCardCache.hpp"
 34 #include "gc/g1/heapRegion.inline.hpp"
 35 #include "gc/shared/gcTraceTime.inline.hpp"
 36 #include "gc/shared/referenceProcessor.hpp"

 37 #include "logging/log.hpp"
 38 #include "memory/iterator.inline.hpp"
 39 #include "oops/oop.inline.hpp"
 40 #include "utilities/ticks.hpp"
 41 
 42 G1DetermineCompactionQueueClosure::G1DetermineCompactionQueueClosure(G1FullCollector* collector) :
 43   _g1h(G1CollectedHeap::heap()),
 44   _collector(collector),
 45   _cur_worker(0) { }
 46 
 47 bool G1FullGCPrepareTask::G1CalculatePointersClosure::do_heap_region(HeapRegion* hr) {
 48   uint region_idx = hr->hrm_index();
 49   assert(_collector->is_compaction_target(region_idx), "must be");
 50 
 51   assert(!hr->is_pinned(), "must be");
 52   assert(!hr->is_closed_archive(), "must be");
 53   assert(!hr->is_open_archive(), "must be");
 54 
 55   prepare_for_compaction(hr);
 56 

130   uint const region_idx = hr->hrm_index();
131   if (!_collector->is_compaction_target(region_idx)) {
132     assert(!hr->is_free(), "all free regions should be compaction targets");
133     assert(_collector->is_skip_compacting(region_idx) || hr->is_closed_archive(), "must be");
134     if (hr->is_young()) {
135       // G1 updates the BOT for old region contents incrementally, but young regions
136       // lack BOT information for performance reasons.
137       // Recreate BOT information of high live ratio young regions here to keep expected
138       // performance during scanning their card tables in the collection pauses later.
139       hr->update_bot();
140     }
141   }
142 
143   // Reset data structures not valid after Full GC.
144   reset_region_metadata(hr);
145 
146   return false;
147 }
148 
149 G1FullGCPrepareTask::G1PrepareCompactLiveClosure::G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp) :
150     _cp(cp) { }
151 
152 size_t G1FullGCPrepareTask::G1PrepareCompactLiveClosure::apply(oop object) {
153   size_t size = object->size();
154   _cp->forward(object, size);
155   return size;
156 }
157 
158 void G1FullGCPrepareTask::G1CalculatePointersClosure::prepare_for_compaction(HeapRegion* hr) {
159   if (!_collector->is_free(hr->hrm_index())) {
160     G1PrepareCompactLiveClosure prepare_compact(_cp);
161     hr->apply_to_marked_objects(_bitmap, &prepare_compact);
162   }
163 }

 17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  *
 23  */
 24 
 25 #include "precompiled.hpp"
 26 #include "gc/g1/g1CollectedHeap.inline.hpp"
 27 #include "gc/g1/g1ConcurrentMarkBitMap.inline.hpp"
 28 #include "gc/g1/g1FullCollector.inline.hpp"
 29 #include "gc/g1/g1FullGCCompactionPoint.hpp"
 30 #include "gc/g1/g1FullGCMarker.hpp"
 31 #include "gc/g1/g1FullGCOopClosures.inline.hpp"
 32 #include "gc/g1/g1FullGCPrepareTask.inline.hpp"
 33 #include "gc/g1/g1HotCardCache.hpp"
 34 #include "gc/g1/heapRegion.inline.hpp"
 35 #include "gc/shared/gcTraceTime.inline.hpp"
 36 #include "gc/shared/referenceProcessor.hpp"
 37 #include "gc/shared/slidingForwarding.inline.hpp"
 38 #include "logging/log.hpp"
 39 #include "memory/iterator.inline.hpp"
 40 #include "oops/oop.inline.hpp"
 41 #include "utilities/ticks.hpp"
 42 
 43 G1DetermineCompactionQueueClosure::G1DetermineCompactionQueueClosure(G1FullCollector* collector) :
 44   _g1h(G1CollectedHeap::heap()),
 45   _collector(collector),
 46   _cur_worker(0) { }
 47 
 48 bool G1FullGCPrepareTask::G1CalculatePointersClosure::do_heap_region(HeapRegion* hr) {
 49   uint region_idx = hr->hrm_index();
 50   assert(_collector->is_compaction_target(region_idx), "must be");
 51 
 52   assert(!hr->is_pinned(), "must be");
 53   assert(!hr->is_closed_archive(), "must be");
 54   assert(!hr->is_open_archive(), "must be");
 55 
 56   prepare_for_compaction(hr);
 57 

131   uint const region_idx = hr->hrm_index();
132   if (!_collector->is_compaction_target(region_idx)) {
133     assert(!hr->is_free(), "all free regions should be compaction targets");
134     assert(_collector->is_skip_compacting(region_idx) || hr->is_closed_archive(), "must be");
135     if (hr->is_young()) {
136       // G1 updates the BOT for old region contents incrementally, but young regions
137       // lack BOT information for performance reasons.
138       // Recreate BOT information of high live ratio young regions here to keep expected
139       // performance during scanning their card tables in the collection pauses later.
140       hr->update_bot();
141     }
142   }
143 
144   // Reset data structures not valid after Full GC.
145   reset_region_metadata(hr);
146 
147   return false;
148 }
149 
150 G1FullGCPrepareTask::G1PrepareCompactLiveClosure::G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp) :
151     _cp(cp), _forwarding(G1CollectedHeap::heap()->forwarding()) { }
152 
153 size_t G1FullGCPrepareTask::G1PrepareCompactLiveClosure::apply(oop object) {
154   size_t size = object->size();
155   _cp->forward(_forwarding, object, size);
156   return size;
157 }
158 
159 void G1FullGCPrepareTask::G1CalculatePointersClosure::prepare_for_compaction(HeapRegion* hr) {
160   if (!_collector->is_free(hr->hrm_index())) {
161     G1PrepareCompactLiveClosure prepare_compact(_cp);
162     hr->apply_to_marked_objects(_bitmap, &prepare_compact);
163   }
164 }
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