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comparison src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 942:2c79770d1f6e

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6819085: G1: use larger and/or user settable region size Summary: Instead of the region size being hard-coded, allow the user to set it. Reviewed-by: jmasa, johnc, apetrusenko
author tonyp
date Thu, 30 Jul 2009 16:22:58 -0400
parents 8b46c4d82093
children 39b01ab7035a
comparison
equal deleted inserted replaced
941:8b46c4d82093 942:2c79770d1f6e
165 165
166 // Other related classes. 166 // Other related classes.
167 friend class G1MarkSweep; 167 friend class G1MarkSweep;
168 168
169 private: 169 private:
170 enum SomePrivateConstants {
171 VeryLargeInBytes = HeapRegion::GrainBytes/2,
172 VeryLargeInWords = VeryLargeInBytes/HeapWordSize,
173 MinHeapDeltaBytes = 10 * HeapRegion::GrainBytes, // FIXME
174 NumAPIs = HeapRegion::MaxAge
175 };
176
177 // The one and only G1CollectedHeap, so static functions can find it. 170 // The one and only G1CollectedHeap, so static functions can find it.
178 static G1CollectedHeap* _g1h; 171 static G1CollectedHeap* _g1h;
172
173 static size_t _humongous_object_threshold_in_words;
179 174
180 // Storage for the G1 heap (excludes the permanent generation). 175 // Storage for the G1 heap (excludes the permanent generation).
181 VirtualSpace _g1_storage; 176 VirtualSpace _g1_storage;
182 MemRegion _g1_reserved; 177 MemRegion _g1_reserved;
183 178
1019 // words. 1014 // words.
1020 virtual size_t large_typearray_limit(); 1015 virtual size_t large_typearray_limit();
1021 1016
1022 // Returns "true" iff the given word_size is "very large". 1017 // Returns "true" iff the given word_size is "very large".
1023 static bool isHumongous(size_t word_size) { 1018 static bool isHumongous(size_t word_size) {
1024 return word_size >= VeryLargeInWords; 1019 return word_size >= _humongous_object_threshold_in_words;
1025 } 1020 }
1026 1021
1027 // Update mod union table with the set of dirty cards. 1022 // Update mod union table with the set of dirty cards.
1028 void updateModUnion(); 1023 void updateModUnion();
1029 1024