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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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931 } | 931 } |
932 | 932 |
933 if (!new_space_high_promotion_mode_active_ && | 933 if (!new_space_high_promotion_mode_active_ && |
934 new_space_.Capacity() == new_space_.MaximumCapacity() && | 934 new_space_.Capacity() == new_space_.MaximumCapacity() && |
935 IsStableOrIncreasingSurvivalTrend() && | 935 IsStableOrIncreasingSurvivalTrend() && |
936 IsHighSurvivalRate()) { | 936 IsHighSurvivalRate()) { |
937 // Stable high survival rates even though young generation is at | 937 // Stable high survival rates even though young generation is at |
938 // maximum capacity indicates that most objects will be promoted. | 938 // maximum capacity indicates that most objects will be promoted. |
939 // To decrease scavenger pauses and final mark-sweep pauses, we | 939 // To decrease scavenger pauses and final mark-sweep pauses, we |
940 // have to limit maximal capacity of the young generation. | 940 // have to limit maximal capacity of the young generation. |
941 new_space_high_promotion_mode_active_ = true; | 941 SetNewSpaceHighPromotionModeActive(true); |
942 if (FLAG_trace_gc) { | 942 if (FLAG_trace_gc) { |
943 PrintPID("Limited new space size due to high promotion rate: %d MB\n", | 943 PrintPID("Limited new space size due to high promotion rate: %d MB\n", |
944 new_space_.InitialCapacity() / MB); | 944 new_space_.InitialCapacity() / MB); |
945 } | 945 } |
946 // Support for global pre-tenuring uses the high promotion mode as a | 946 // Support for global pre-tenuring uses the high promotion mode as a |
947 // heuristic indicator of whether to pretenure or not, we trigger | 947 // heuristic indicator of whether to pretenure or not, we trigger |
948 // deoptimization here to take advantage of pre-tenuring as soon as | 948 // deoptimization here to take advantage of pre-tenuring as soon as |
949 // possible. | 949 // possible. |
950 if (FLAG_pretenure_literals) { | 950 if (FLAG_pretenuring) { |
951 isolate_->stack_guard()->FullDeopt(); | 951 isolate_->stack_guard()->FullDeopt(); |
952 } | 952 } |
953 } else if (new_space_high_promotion_mode_active_ && | 953 } else if (new_space_high_promotion_mode_active_ && |
954 IsStableOrDecreasingSurvivalTrend() && | 954 IsStableOrDecreasingSurvivalTrend() && |
955 IsLowSurvivalRate()) { | 955 IsLowSurvivalRate()) { |
956 // Decreasing low survival rates might indicate that the above high | 956 // Decreasing low survival rates might indicate that the above high |
957 // promotion mode is over and we should allow the young generation | 957 // promotion mode is over and we should allow the young generation |
958 // to grow again. | 958 // to grow again. |
959 new_space_high_promotion_mode_active_ = false; | 959 SetNewSpaceHighPromotionModeActive(false); |
960 if (FLAG_trace_gc) { | 960 if (FLAG_trace_gc) { |
961 PrintPID("Unlimited new space size due to low promotion rate: %d MB\n", | 961 PrintPID("Unlimited new space size due to low promotion rate: %d MB\n", |
962 new_space_.MaximumCapacity() / MB); | 962 new_space_.MaximumCapacity() / MB); |
963 } | 963 } |
964 // Trigger deoptimization here to turn off pre-tenuring as soon as | 964 // Trigger deoptimization here to turn off pre-tenuring as soon as |
965 // possible. | 965 // possible. |
966 if (FLAG_pretenure_literals) { | 966 if (FLAG_pretenuring) { |
967 isolate_->stack_guard()->FullDeopt(); | 967 isolate_->stack_guard()->FullDeopt(); |
968 } | 968 } |
969 } | 969 } |
970 | 970 |
971 if (new_space_high_promotion_mode_active_ && | 971 if (new_space_high_promotion_mode_active_ && |
972 new_space_.Capacity() > new_space_.InitialCapacity()) { | 972 new_space_.Capacity() > new_space_.InitialCapacity()) { |
973 new_space_.Shrink(); | 973 new_space_.Shrink(); |
974 } | 974 } |
975 | 975 |
976 isolate_->counters()->objs_since_last_young()->Set(0); | 976 isolate_->counters()->objs_since_last_young()->Set(0); |
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7943 if (FLAG_parallel_recompilation) { | 7943 if (FLAG_parallel_recompilation) { |
7944 heap_->relocation_mutex_->Lock(); | 7944 heap_->relocation_mutex_->Lock(); |
7945 #ifdef DEBUG | 7945 #ifdef DEBUG |
7946 heap_->relocation_mutex_locked_by_optimizer_thread_ = | 7946 heap_->relocation_mutex_locked_by_optimizer_thread_ = |
7947 heap_->isolate()->optimizing_compiler_thread()->IsOptimizerThread(); | 7947 heap_->isolate()->optimizing_compiler_thread()->IsOptimizerThread(); |
7948 #endif // DEBUG | 7948 #endif // DEBUG |
7949 } | 7949 } |
7950 } | 7950 } |
7951 | 7951 |
7952 } } // namespace v8::internal | 7952 } } // namespace v8::internal |
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