Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp @ 549:fe3d7c11b4b7
6700941: G1: allocation spec missing for some G1 classes
Reviewed-by: tonyp
author | apetrusenko |
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date | Tue, 10 Feb 2009 18:39:09 +0300 |
parents | 37f87013dfd8 |
children | 0fbdb4381b99 |
rev | line source |
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342 | 1 /* |
2 * Copyright 2001-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // Forward decl | |
26 class ConcurrentG1RefineThread; | |
27 class G1RemSet; | |
28 | |
29 // What to do after a yield: | |
30 enum PostYieldAction { | |
31 PYA_continue, // Continue the traversal | |
32 PYA_restart, // Restart | |
33 PYA_cancel // It's been completed by somebody else: cancel. | |
34 }; | |
35 | |
549
fe3d7c11b4b7
6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents:
342
diff
changeset
|
36 class ConcurrentG1Refine: public CHeapObj { |
342 | 37 ConcurrentG1RefineThread* _cg1rThread; |
38 | |
39 volatile jint _pya; | |
40 PostYieldAction _last_pya; | |
41 | |
42 static bool _enabled; // Protected by G1ConcRefine_mon. | |
43 unsigned _traversals; | |
44 | |
45 // Number of cards processed during last refinement traversal. | |
46 unsigned _first_traversal; | |
47 unsigned _last_cards_during; | |
48 | |
49 // The cache for card refinement. | |
50 bool _use_cache; | |
51 bool _def_use_cache; | |
52 size_t _n_periods; | |
53 size_t _total_cards; | |
54 size_t _total_travs; | |
55 | |
56 unsigned char* _card_counts; | |
57 unsigned _n_card_counts; | |
58 const jbyte* _ct_bot; | |
59 unsigned* _cur_card_count_histo; | |
60 unsigned* _cum_card_count_histo; | |
61 jbyte** _hot_cache; | |
62 int _hot_cache_size; | |
63 int _n_hot; | |
64 int _hot_cache_idx; | |
65 | |
66 // Returns the count of this card after incrementing it. | |
67 int add_card_count(jbyte* card_ptr); | |
68 | |
69 void print_card_count_histo_range(unsigned* histo, int from, int to, | |
70 float& cum_card_pct, | |
71 float& cum_travs_pct); | |
72 public: | |
73 ConcurrentG1Refine(); | |
74 ~ConcurrentG1Refine(); | |
75 | |
76 void init(); // Accomplish some initialization that has to wait. | |
77 | |
78 // Enabled Conc refinement, waking up thread if necessary. | |
79 void enable(); | |
80 | |
81 // Returns the number of traversals performed since this refiner was enabled. | |
82 unsigned disable(); | |
83 | |
84 // Requires G1ConcRefine_mon to be held. | |
85 bool enabled() { return _enabled; } | |
86 | |
87 // Returns only when G1 concurrent refinement has been enabled. | |
88 void wait_for_ConcurrentG1Refine_enabled(); | |
89 | |
90 // Do one concurrent refinement pass over the card table. Returns "true" | |
91 // if heuristics determine that another pass should be done immediately. | |
92 bool refine(); | |
93 | |
94 // Indicate that an in-progress refinement pass should start over. | |
95 void set_pya_restart(); | |
96 // Indicate that an in-progress refinement pass should quit. | |
97 void set_pya_cancel(); | |
98 | |
99 // Get the appropriate post-yield action. Also sets last_pya. | |
100 PostYieldAction get_pya(); | |
101 | |
102 // The last PYA read by "get_pya". | |
103 PostYieldAction get_last_pya(); | |
104 | |
105 bool do_traversal(); | |
106 | |
107 ConcurrentG1RefineThread* cg1rThread() { return _cg1rThread; } | |
108 | |
109 // If this is the first entry for the slot, writes into the cache and | |
110 // returns NULL. If it causes an eviction, returns the evicted pointer. | |
111 // Otherwise, its a cache hit, and returns NULL. | |
112 jbyte* cache_insert(jbyte* card_ptr); | |
113 | |
114 // Process the cached entries. | |
115 void clean_up_cache(int worker_i, G1RemSet* g1rs); | |
116 | |
117 // Discard entries in the hot cache. | |
118 void clear_hot_cache() { | |
119 _hot_cache_idx = 0; _n_hot = 0; | |
120 } | |
121 | |
122 bool hot_cache_is_empty() { return _n_hot == 0; } | |
123 | |
124 bool use_cache() { return _use_cache; } | |
125 void set_use_cache(bool b) { | |
126 if (b) _use_cache = _def_use_cache; | |
127 else _use_cache = false; | |
128 } | |
129 | |
130 void clear_and_record_card_counts(); | |
131 void print_final_card_counts(); | |
132 }; |