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comparison src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp @ 17754:d7070f371770

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8035815: Cache-align and pad the from card cache Summary: The from card cache is a very frequently accessed data structure. It is essentially a 2d array of per-region values, one row of values for every GC thread. Pad and align the data structure to avoid false sharing. Reviewed-by: stefank
author tschatzl
date Mon, 24 Mar 2014 15:30:30 +0100
parents 191174b49bec
children ae7336d6337e
comparison
equal deleted inserted replaced
17753:191174b49bec 17754:d7070f371770
119 // false. 119 // false.
120 bool del_single_region_table(size_t ind, HeapRegion* hr); 120 bool del_single_region_table(size_t ind, HeapRegion* hr);
121 121
122 // Indexed by thread X heap region, to minimize thread contention. 122 // Indexed by thread X heap region, to minimize thread contention.
123 static int** _from_card_cache; 123 static int** _from_card_cache;
124 static size_t _from_card_cache_max_regions; 124 static uint _from_card_cache_max_regions;
125 static size_t _from_card_cache_mem_size; 125 static size_t _from_card_cache_mem_size;
126 126
127 // link/add the given fine grain remembered set into the "all" list 127 // link/add the given fine grain remembered set into the "all" list
128 void link_to_all(PerRegionTable * prt); 128 void link_to_all(PerRegionTable * prt);
129 // unlink/remove the given fine grain remembered set into the "all" list 129 // unlink/remove the given fine grain remembered set into the "all" list
168 168
169 void do_cleanup_work(HRRSCleanupTask* hrrs_cleanup_task); 169 void do_cleanup_work(HRRSCleanupTask* hrrs_cleanup_task);
170 170
171 // Declare the heap size (in # of regions) to the OtherRegionsTable. 171 // Declare the heap size (in # of regions) to the OtherRegionsTable.
172 // (Uses it to initialize from_card_cache). 172 // (Uses it to initialize from_card_cache).
173 static void init_from_card_cache(size_t max_regions); 173 static void init_from_card_cache(uint max_regions);
174 174
175 // Declares that only regions i s.t. 0 <= i < new_n_regs are in use. 175 // Declares that only regions i s.t. 0 <= i < new_n_regs are in use.
176 // Make sure any entries for higher regions are invalid. 176 // Make sure any entries for higher regions are invalid.
177 static void shrink_from_card_cache(size_t new_n_regs); 177 static void shrink_from_card_cache(uint new_n_regs);
178 178
179 static void print_from_card_cache(); 179 static void print_from_card_cache();
180 }; 180 };
181 181
182 class HeapRegionRemSet : public CHeapObj<mtGC> { 182 class HeapRegionRemSet : public CHeapObj<mtGC> {
220 static void print_event(outputStream* str, Event evnt); 220 static void print_event(outputStream* str, Event evnt);
221 221
222 public: 222 public:
223 HeapRegionRemSet(G1BlockOffsetSharedArray* bosa, HeapRegion* hr); 223 HeapRegionRemSet(G1BlockOffsetSharedArray* bosa, HeapRegion* hr);
224 224
225 static int num_par_rem_sets(); 225 static uint num_par_rem_sets();
226 static void setup_remset_size(); 226 static void setup_remset_size();
227 227
228 HeapRegion* hr() const { 228 HeapRegion* hr() const {
229 return _other_regions.hr(); 229 return _other_regions.hr();
230 } 230 }
356 356
357 // Declare the heap size (in # of regions) to the HeapRegionRemSet(s). 357 // Declare the heap size (in # of regions) to the HeapRegionRemSet(s).
358 // (Uses it to initialize from_card_cache). 358 // (Uses it to initialize from_card_cache).
359 static void init_heap(uint max_regions) { 359 static void init_heap(uint max_regions) {
360 G1CodeRootSet::initialize(); 360 G1CodeRootSet::initialize();
361 OtherRegionsTable::init_from_card_cache((size_t) max_regions); 361 OtherRegionsTable::init_from_card_cache(max_regions);
362 } 362 }
363 363
364 // Declares that only regions i s.t. 0 <= i < new_n_regs are in use. 364 // Declares that only regions i s.t. 0 <= i < new_n_regs are in use.
365 static void shrink_heap(uint new_n_regs) { 365 static void shrink_heap(uint new_n_regs) {
366 OtherRegionsTable::shrink_from_card_cache((size_t) new_n_regs); 366 OtherRegionsTable::shrink_from_card_cache(new_n_regs);
367 } 367 }
368 368
369 #ifndef PRODUCT 369 #ifndef PRODUCT
370 static void print_from_card_cache() { 370 static void print_from_card_cache() {
371 OtherRegionsTable::print_from_card_cache(); 371 OtherRegionsTable::print_from_card_cache();