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comparison src/share/vm/gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp @ 14909:4ca6dc0799b6

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Backout jdk9 merge
author Gilles Duboscq <duboscq@ssw.jku.at>
date Tue, 01 Apr 2014 13:57:07 +0200
parents 44315152d434
children 52b4284cb496
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14908:8db6e76cb658 14909:4ca6dc0799b6
35 // based on current application characteristics (based on gc cost 35 // based on current application characteristics (based on gc cost
36 // and application footprint). 36 // and application footprint).
37 // 37 //
38 // It also computes an optimal tenuring threshold between the young 38 // It also computes an optimal tenuring threshold between the young
39 // and old generations, so as to equalize the cost of collections 39 // and old generations, so as to equalize the cost of collections
40 // of those generations, as well as optimal survivor space sizes 40 // of those generations, as well as optimial survivor space sizes
41 // for the young generation. 41 // for the young generation.
42 // 42 //
43 // While this class is specifically intended for a generational system 43 // While this class is specifically intended for a generational system
44 // consisting of a young gen (containing an Eden and two semi-spaces) 44 // consisting of a young gen (containing an Eden and two semi-spaces)
45 // and a tenured gen, as well as a perm gen for reflective data, it 45 // and a tenured gen, as well as a perm gen for reflective data, it
111 bool _old_gen_policy_is_ready; 111 bool _old_gen_policy_is_ready;
112 112
113 // Changing the generation sizing depends on the data that is 113 // Changing the generation sizing depends on the data that is
114 // gathered about the effects of changes on the pause times and 114 // gathered about the effects of changes on the pause times and
115 // throughput. These variable count the number of data points 115 // throughput. These variable count the number of data points
116 // gathered. The policy may use these counters as a threshold 116 // gathered. The policy may use these counters as a threshhold
117 // for reliable data. 117 // for reliable data.
118 julong _young_gen_change_for_major_pause_count; 118 julong _young_gen_change_for_major_pause_count;
119 119
120 // To facilitate faster growth at start up, supplement the normal 120 // To facilitate faster growth at start up, supplement the normal
121 // growth percentage for the young gen eden and the 121 // growth percentage for the young gen eden and the
238 // called by GC algorithms. It is the responsibility of users of this 238 // called by GC algorithms. It is the responsibility of users of this
239 // policy to call these methods at the correct times! 239 // policy to call these methods at the correct times!
240 void major_collection_begin(); 240 void major_collection_begin();
241 void major_collection_end(size_t amount_live, GCCause::Cause gc_cause); 241 void major_collection_end(size_t amount_live, GCCause::Cause gc_cause);
242 242
243 //
243 void tenured_allocation(size_t size) { 244 void tenured_allocation(size_t size) {
244 _avg_pretenured->sample(size); 245 _avg_pretenured->sample(size);
245 } 246 }
246 247
247 // Accessors 248 // Accessors
248 // NEEDS_CLEANUP should use sizes.hpp 249 // NEEDS_CLEANUP should use sizes.hpp
249 250
250 static size_t calculate_free_based_on_live(size_t live, uintx ratio_as_percentage); 251 size_t calculated_old_free_size_in_bytes() const {
251 252 return (size_t)(_promo_size + avg_promoted()->padded_average());
252 size_t calculated_old_free_size_in_bytes() const; 253 }
253 254
254 size_t average_old_live_in_bytes() const { 255 size_t average_old_live_in_bytes() const {
255 return (size_t) avg_old_live()->average(); 256 return (size_t) avg_old_live()->average();
256 } 257 }
257 258