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comparison src/share/vm/oops/markOop.hpp @ 113:ba764ed4b6f2

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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author coleenp
date Sun, 13 Apr 2008 17:43:42 -0400
parents d8b3ef7ee3e5
children 790e66e5fbac 37f87013dfd8
comparison
equal deleted inserted replaced
110:a49a647afe9a 113:ba764ed4b6f2
87 public: 87 public:
88 // Constants 88 // Constants
89 enum { age_bits = 4, 89 enum { age_bits = 4,
90 lock_bits = 2, 90 lock_bits = 2,
91 biased_lock_bits = 1, 91 biased_lock_bits = 1,
92 max_hash_bits = BitsPerOop - age_bits - lock_bits - biased_lock_bits, 92 max_hash_bits = BitsPerWord - age_bits - lock_bits - biased_lock_bits,
93 hash_bits = max_hash_bits > 31 ? 31 : max_hash_bits, 93 hash_bits = max_hash_bits > 31 ? 31 : max_hash_bits,
94 epoch_bits = 2 94 epoch_bits = 2
95 }; 95 };
96 96
97 // The biased locking code currently requires that the age bits be 97 // The biased locking code currently requires that the age bits be