14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP 27 28 #include "memory/collectorPolicy.hpp" 29 30 // There is a nice batch of tested generation sizing code in 31 // TwoGenerationCollectorPolicy. Lets reuse it! 32 33 class GenerationSizer : public TwoGenerationCollectorPolicy { 34 public: 35 GenerationSizer() { 36 // Partial init only! 37 initialize_flags(); 38 initialize_size_info(); 39 } 40 41 void initialize_flags() { 42 // Do basic sizing work 43 TwoGenerationCollectorPolicy::initialize_flags(); 44 45 assert(UseSerialGC || 46 !FLAG_IS_DEFAULT(ParallelGCThreads) || 47 (ParallelGCThreads > 0), 48 "ParallelGCThreads should be set before flag initialization"); 49 50 // The survivor ratio's are calculated "raw", unlike the 51 // default gc, which adds 2 to the ratio value. We need to 52 // make sure the values are valid before using them. 53 if (MinSurvivorRatio < 3) { 54 MinSurvivorRatio = 3; 55 } 56 57 if (InitialSurvivorRatio < 3) { 58 InitialSurvivorRatio = 3; 59 } 60 } 61 62 size_t min_young_gen_size() { return _min_gen0_size; } 63 size_t young_gen_size() { return _initial_gen0_size; } 64 size_t max_young_gen_size() { return _max_gen0_size; } 65 66 size_t min_old_gen_size() { return _min_gen1_size; } 67 size_t old_gen_size() { return _initial_gen1_size; } 68 size_t max_old_gen_size() { return _max_gen1_size; } 69 }; 70 71 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP | 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP 27 28 #include "memory/collectorPolicy.hpp" 29 30 // There is a nice batch of tested generation sizing code in 31 // TwoGenerationCollectorPolicy. Lets reuse it! 32 33 class GenerationSizer : public TwoGenerationCollectorPolicy { 34 private: 35 36 void trace_gen_sizes(const char* const str); 37 38 // The alignment used for boundary between young gen and old gen 39 static size_t default_gen_alignment() { return 64 * K * HeapWordSize; } 40 41 protected: 42 43 void initialize_alignments(); 44 void initialize_flags(); 45 void initialize_size_info(); 46 }; 47 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP |