Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CardCounts.hpp @ 12233:40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
Summary: Use conservative assumptions of required alignment for the various garbage collector components into account when determining the maximum heap size that supports compressed oops. Using this conservative value avoids several circular dependencies in the calculation.
Reviewed-by: stefank, dholmes
| author | tschatzl |
|---|---|
| date | Wed, 11 Sep 2013 16:25:02 +0200 |
| parents | bed55d125e37 |
| children | 9cb63cd234a0 |
| rev | line source |
|---|---|
| 10246 | 1 /* |
| 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 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_G1_G1CARDCOUNTS_HPP | |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1CARDCOUNTS_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "runtime/virtualspace.hpp" | |
| 30 #include "utilities/globalDefinitions.hpp" | |
| 31 | |
| 32 class CardTableModRefBS; | |
| 33 class G1CollectedHeap; | |
| 34 class HeapRegion; | |
| 35 | |
| 36 // Table to track the number of times a card has been refined. Once | |
| 37 // a card has been refined a certain number of times, it is | |
| 38 // considered 'hot' and its refinement is delayed by inserting the | |
| 39 // card into the hot card cache. The card will then be refined when | |
| 40 // it is evicted from the hot card cache, or when the hot card cache | |
| 41 // is 'drained' during the next evacuation pause. | |
| 42 | |
| 43 class G1CardCounts: public CHeapObj<mtGC> { | |
| 44 G1CollectedHeap* _g1h; | |
| 45 | |
| 46 // The table of counts | |
| 47 jubyte* _card_counts; | |
| 48 | |
| 49 // Max capacity of the reserved space for the counts table | |
| 50 size_t _reserved_max_card_num; | |
| 51 | |
| 52 // Max capacity of the committed space for the counts table | |
| 53 size_t _committed_max_card_num; | |
| 54 | |
| 55 // Size of committed space for the counts table | |
| 56 size_t _committed_size; | |
| 57 | |
| 58 // CardTable bottom. | |
| 59 const jbyte* _ct_bot; | |
| 60 | |
| 61 // Barrier set | |
| 62 CardTableModRefBS* _ct_bs; | |
| 63 | |
| 64 // The virtual memory backing the counts table | |
| 65 VirtualSpace _card_counts_storage; | |
| 66 | |
| 67 // Returns true if the card counts table has been reserved. | |
| 68 bool has_reserved_count_table() { return _card_counts != NULL; } | |
| 69 | |
| 70 // Returns true if the card counts table has been reserved and committed. | |
| 71 bool has_count_table() { | |
| 72 return has_reserved_count_table() && _committed_max_card_num > 0; | |
| 73 } | |
| 74 | |
| 75 void check_card_num(size_t card_num, const char* msg) { | |
| 76 assert(card_num >= 0 && card_num < _committed_max_card_num, msg); | |
| 77 } | |
| 78 | |
| 79 size_t ptr_2_card_num(const jbyte* card_ptr) { | |
| 80 assert(card_ptr >= _ct_bot, | |
| 81 err_msg("Inavalied card pointer: " | |
| 82 "card_ptr: " PTR_FORMAT ", " | |
| 83 "_ct_bot: " PTR_FORMAT, | |
| 84 card_ptr, _ct_bot)); | |
| 85 size_t card_num = pointer_delta(card_ptr, _ct_bot, sizeof(jbyte)); | |
| 86 check_card_num(card_num, | |
| 87 err_msg("card pointer out of range: " PTR_FORMAT, card_ptr)); | |
| 88 return card_num; | |
| 89 } | |
| 90 | |
| 91 jbyte* card_num_2_ptr(size_t card_num) { | |
| 92 check_card_num(card_num, | |
| 93 err_msg("card num out of range: "SIZE_FORMAT, card_num)); | |
| 94 return (jbyte*) (_ct_bot + card_num); | |
| 95 } | |
| 96 | |
|
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8014408: G1: crashes with assert assert(prev_committed_card_num == _committed_max_card_num) failed
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parents:
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97 // Helper routine. |
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8014408: G1: crashes with assert assert(prev_committed_card_num == _committed_max_card_num) failed
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98 // Returns the number of cards that can be counted by the given committed |
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8014408: G1: crashes with assert assert(prev_committed_card_num == _committed_max_card_num) failed
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99 // table size, with a maximum of the number of cards spanned by the max |
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bed55d125e37
8014408: G1: crashes with assert assert(prev_committed_card_num == _committed_max_card_num) failed
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parents:
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100 // capacity of the heap. |
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8014408: G1: crashes with assert assert(prev_committed_card_num == _committed_max_card_num) failed
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101 size_t committed_to_card_num(size_t committed_size) { |
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bed55d125e37
8014408: G1: crashes with assert assert(prev_committed_card_num == _committed_max_card_num) failed
johnc
parents:
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102 return MIN2(_reserved_max_card_num, committed_size / sizeof(jbyte)); |
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bed55d125e37
8014408: G1: crashes with assert assert(prev_committed_card_num == _committed_max_card_num) failed
johnc
parents:
10246
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changeset
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103 } |
|
bed55d125e37
8014408: G1: crashes with assert assert(prev_committed_card_num == _committed_max_card_num) failed
johnc
parents:
10246
diff
changeset
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104 |
| 10246 | 105 // Clear the counts table for the given (exclusive) index range. |
| 106 void clear_range(size_t from_card_num, size_t to_card_num); | |
| 107 | |
| 108 public: | |
| 109 G1CardCounts(G1CollectedHeap* g1h); | |
| 110 ~G1CardCounts(); | |
| 111 | |
| 112 void initialize(); | |
| 113 | |
| 114 // Resize the committed space for the card counts table in | |
| 115 // response to a resize of the committed space for the heap. | |
| 116 void resize(size_t heap_capacity); | |
| 117 | |
| 118 // Increments the refinement count for the given card. | |
| 119 // Returns the pre-increment count value. | |
| 120 uint add_card_count(jbyte* card_ptr); | |
| 121 | |
| 122 // Returns true if the given count is high enough to be considered | |
| 123 // 'hot'; false otherwise. | |
| 124 bool is_hot(uint count); | |
| 125 | |
| 126 // Clears the card counts for the cards spanned by the region | |
| 127 void clear_region(HeapRegion* hr); | |
| 128 | |
| 129 // Clear the entire card counts table during GC. | |
| 130 // Updates the policy stats with the duration. | |
| 131 void clear_all(); | |
| 132 }; | |
| 133 | |
| 134 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1CARDCOUNTS_HPP |