Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 2951:0c0e407faa39
another fix to debug info (on-stack parameters), DCE removes unnecessary merges and LoopBegins whose LoopEnd went away
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Tue, 14 Jun 2011 16:47:31 +0200 |
parents | abdfc822206f |
children | f44782f04dd4 |
rev | line source |
---|---|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
1 /* |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
4 * |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
5 * This code is free software; you can redistribute it and/or modify it |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
6 * under the terms of the GNU General Public License version 2 only, as |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
7 * published by the Free Software Foundation. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
8 * |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
12 * version 2 for more details (a copy is included in the LICENSE file that |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
13 * accompanied this code). |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
14 * |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
15 * You should have received a copy of the GNU General Public License version |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
16 * 2 along with this work; if not, write to the Free Software Foundation, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
18 * |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
21 * questions. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
22 * |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
23 */ |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
24 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
25 #include "precompiled.hpp" |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
26 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
28 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
29 G1CollectedHeap* G1AllocRegion::_g1h = NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
30 HeapRegion* G1AllocRegion::_dummy_region = NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
31 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
32 void G1AllocRegion::setup(G1CollectedHeap* g1h, HeapRegion* dummy_region) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
33 assert(_dummy_region == NULL, "should be set once"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
34 assert(dummy_region != NULL, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
35 assert(dummy_region->free() == 0, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
36 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
37 // Make sure that any allocation attempt on this region will fail |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
38 // and will not trigger any asserts. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
39 assert(allocate(dummy_region, 1, false) == NULL, "should fail"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
40 assert(par_allocate(dummy_region, 1, false) == NULL, "should fail"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
41 assert(allocate(dummy_region, 1, true) == NULL, "should fail"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
42 assert(par_allocate(dummy_region, 1, true) == NULL, "should fail"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
43 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
44 _g1h = g1h; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
45 _dummy_region = dummy_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
46 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
47 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
48 void G1AllocRegion::fill_up_remaining_space(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
49 bool bot_updates) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
50 assert(alloc_region != NULL && alloc_region != _dummy_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
51 "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
52 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
53 // Other threads might still be trying to allocate using a CAS out |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
54 // of the region we are trying to retire, as they can do so without |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
55 // holding the lock. So, we first have to make sure that noone else |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
56 // can allocate out of it by doing a maximal allocation. Even if our |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
57 // CAS attempt fails a few times, we'll succeed sooner or later |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
58 // given that failed CAS attempts mean that the region is getting |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
59 // closed to being full. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
60 size_t free_word_size = alloc_region->free() / HeapWordSize; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
61 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
62 // This is the minimum free chunk we can turn into a dummy |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
63 // object. If the free space falls below this, then noone can |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
64 // allocate in this region anyway (all allocation requests will be |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
65 // of a size larger than this) so we won't have to perform the dummy |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
66 // allocation. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
67 size_t min_word_size_to_fill = CollectedHeap::min_fill_size(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
68 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
69 while (free_word_size >= min_word_size_to_fill) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
70 HeapWord* dummy = par_allocate(alloc_region, free_word_size, bot_updates); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
71 if (dummy != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
72 // If the allocation was successful we should fill in the space. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
73 CollectedHeap::fill_with_object(dummy, free_word_size); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
74 alloc_region->set_pre_dummy_top(dummy); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
75 break; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
76 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
77 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
78 free_word_size = alloc_region->free() / HeapWordSize; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
79 // It's also possible that someone else beats us to the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
80 // allocation and they fill up the region. In that case, we can |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
81 // just get out of the loop. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
82 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
83 assert(alloc_region->free() / HeapWordSize < min_word_size_to_fill, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
84 "post-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
85 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
86 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
87 void G1AllocRegion::retire(bool fill_up) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
88 assert(_alloc_region != NULL, ar_ext_msg(this, "not initialized properly")); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
89 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
90 trace("retiring"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
91 HeapRegion* alloc_region = _alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
92 if (alloc_region != _dummy_region) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
93 // We never have to check whether the active region is empty or not, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
94 // and potentially free it if it is, given that it's guaranteed that |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
95 // it will never be empty. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
96 assert(!alloc_region->is_empty(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
97 ar_ext_msg(this, "the alloc region should never be empty")); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
98 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
99 if (fill_up) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
100 fill_up_remaining_space(alloc_region, _bot_updates); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
101 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
102 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
103 assert(alloc_region->used() >= _used_bytes_before, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
104 ar_ext_msg(this, "invariant")); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
105 size_t allocated_bytes = alloc_region->used() - _used_bytes_before; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
106 retire_region(alloc_region, allocated_bytes); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
107 _used_bytes_before = 0; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
108 _alloc_region = _dummy_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
109 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
110 trace("retired"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
111 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
112 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
113 HeapWord* G1AllocRegion::new_alloc_region_and_allocate(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
114 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
115 assert(_alloc_region == _dummy_region, ar_ext_msg(this, "pre-condition")); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
116 assert(_used_bytes_before == 0, ar_ext_msg(this, "pre-condition")); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
117 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
118 trace("attempting region allocation"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
119 HeapRegion* new_alloc_region = allocate_new_region(word_size, force); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
120 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
121 new_alloc_region->reset_pre_dummy_top(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
122 // Need to do this before the allocation |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
123 _used_bytes_before = new_alloc_region->used(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
124 HeapWord* result = allocate(new_alloc_region, word_size, _bot_updates); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
125 assert(result != NULL, ar_ext_msg(this, "the allocation should succeeded")); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
126 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
127 OrderAccess::storestore(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
128 // Note that we first perform the allocation and then we store the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
129 // region in _alloc_region. This is the reason why an active region |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
130 // can never be empty. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
131 _alloc_region = new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
132 trace("region allocation successful"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
133 return result; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
134 } else { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
135 trace("region allocation failed"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
136 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
137 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
138 ShouldNotReachHere(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
139 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
140 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
141 void G1AllocRegion::fill_in_ext_msg(ar_ext_msg* msg, const char* message) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
142 msg->append("[%s] %s b: %s r: "PTR_FORMAT" u: "SIZE_FORMAT, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
143 _name, message, BOOL_TO_STR(_bot_updates), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
144 _alloc_region, _used_bytes_before); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
145 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
146 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
147 void G1AllocRegion::init() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
148 trace("initializing"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
149 assert(_alloc_region == NULL && _used_bytes_before == 0, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
150 ar_ext_msg(this, "pre-condition")); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
151 assert(_dummy_region != NULL, "should have been set"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
152 _alloc_region = _dummy_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
153 trace("initialized"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
154 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
155 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
156 HeapRegion* G1AllocRegion::release() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
157 trace("releasing"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
158 HeapRegion* alloc_region = _alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
159 retire(false /* fill_up */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
160 assert(_alloc_region == _dummy_region, "post-condition of retire()"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
161 _alloc_region = NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
162 trace("released"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
163 return (alloc_region == _dummy_region) ? NULL : alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
164 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
165 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
166 #if G1_ALLOC_REGION_TRACING |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
167 void G1AllocRegion::trace(const char* str, size_t word_size, HeapWord* result) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
168 // All the calls to trace that set either just the size or the size |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
169 // and the result are considered part of level 2 tracing and are |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
170 // skipped during level 1 tracing. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
171 if ((word_size == 0 && result == NULL) || (G1_ALLOC_REGION_TRACING > 1)) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
172 const size_t buffer_length = 128; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
173 char hr_buffer[buffer_length]; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
174 char rest_buffer[buffer_length]; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
175 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
176 HeapRegion* alloc_region = _alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
177 if (alloc_region == NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
178 jio_snprintf(hr_buffer, buffer_length, "NULL"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
179 } else if (alloc_region == _dummy_region) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
180 jio_snprintf(hr_buffer, buffer_length, "DUMMY"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
181 } else { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
182 jio_snprintf(hr_buffer, buffer_length, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
183 HR_FORMAT, HR_FORMAT_PARAMS(alloc_region)); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
184 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
185 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
186 if (G1_ALLOC_REGION_TRACING > 1) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
187 if (result != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
188 jio_snprintf(rest_buffer, buffer_length, SIZE_FORMAT" "PTR_FORMAT, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
189 word_size, result); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
190 } else if (word_size != 0) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
191 jio_snprintf(rest_buffer, buffer_length, SIZE_FORMAT, word_size); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
192 } else { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
193 jio_snprintf(rest_buffer, buffer_length, ""); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
194 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
195 } else { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
196 jio_snprintf(rest_buffer, buffer_length, ""); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
197 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
198 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
199 tty->print_cr("[%s] %s : %s %s", _name, hr_buffer, str, rest_buffer); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
200 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
201 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
202 #endif // G1_ALLOC_REGION_TRACING |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
203 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
204 G1AllocRegion::G1AllocRegion(const char* name, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
205 bool bot_updates) |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
206 : _name(name), _bot_updates(bot_updates), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
207 _alloc_region(NULL), _used_bytes_before(0) { } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
diff
changeset
|
208 |