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comparison src/share/vm/utilities/taskqueue.cpp @ 1311:2a1472c30599

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4396719: Mark Sweep stack overflow on deeply nested Object arrays Summary: Use an explicit stack for object arrays and process them in chunks. Reviewed-by: iveresov, apetrusenko
author jcoomes
date Wed, 03 Mar 2010 14:48:26 -0800
parents df6caf649ff7
children c18cbe5936b8
comparison
equal deleted inserted replaced
1289:d47555d7aca8 1311:2a1472c30599
28 #ifdef TRACESPINNING 28 #ifdef TRACESPINNING
29 uint ParallelTaskTerminator::_total_yields = 0; 29 uint ParallelTaskTerminator::_total_yields = 0;
30 uint ParallelTaskTerminator::_total_spins = 0; 30 uint ParallelTaskTerminator::_total_spins = 0;
31 uint ParallelTaskTerminator::_total_peeks = 0; 31 uint ParallelTaskTerminator::_total_peeks = 0;
32 #endif 32 #endif
33
34 bool TaskQueueSuper::peek() {
35 return _bottom != _age.top();
36 }
37 33
38 int TaskQueueSetSuper::randomParkAndMiller(int *seed0) { 34 int TaskQueueSetSuper::randomParkAndMiller(int *seed0) {
39 const int a = 16807; 35 const int a = 16807;
40 const int m = 2147483647; 36 const int m = 2147483647;
41 const int q = 127773; /* m div a */ 37 const int q = 127773; /* m div a */
178 "Terminator may still be in use"); 174 "Terminator may still be in use");
179 _offered_termination = 0; 175 _offered_termination = 0;
180 } 176 }
181 } 177 }
182 178
179 #ifdef ASSERT
180 bool ObjArrayTask::is_valid() const {
181 return _obj != NULL && _obj->is_objArray() && _index > 0 &&
182 _index < objArrayOop(_obj)->length();
183 }
184 #endif // ASSERT
185
183 bool RegionTaskQueueWithOverflow::is_empty() { 186 bool RegionTaskQueueWithOverflow::is_empty() {
184 return (_region_queue.size() == 0) && 187 return (_region_queue.size() == 0) &&
185 (_overflow_stack->length() == 0); 188 (_overflow_stack->length() == 0);
186 } 189 }
187 190