author | rehn |
Mon, 18 Jun 2018 16:13:21 +0200 | |
changeset 50608 | 1609a43e77ae |
parent 50445 | bd6b78feb6a3 |
child 50815 | 54a285a5c6cb |
permissions | -rw-r--r-- |
50158 | 1 |
/* |
2 |
* Copyright (c) 2018, 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_UTILITIES_CONCURRENT_HASH_TABLE_TASKS_INLINE_HPP |
|
26 |
#define SHARE_UTILITIES_CONCURRENT_HASH_TABLE_TASKS_INLINE_HPP |
|
27 |
||
50445
bd6b78feb6a3
8195097: Make it possible to process StringTable outside safepoint
rehn
parents:
50158
diff
changeset
|
28 |
#include "utilities/globalDefinitions.hpp" |
50158 | 29 |
#include "utilities/concurrentHashTable.inline.hpp" |
30 |
||
31 |
// This inline file contains BulkDeleteTask and GrowTasks which are both bucket |
|
32 |
// operations, which they are serialized with each other. |
|
33 |
||
34 |
// Base class for pause and/or parallel bulk operations. |
|
35 |
template <typename VALUE, typename CONFIG, MEMFLAGS F> |
|
36 |
class ConcurrentHashTable<VALUE, CONFIG, F>::BucketsOperation { |
|
37 |
protected: |
|
38 |
ConcurrentHashTable<VALUE, CONFIG, F>* _cht; |
|
39 |
||
40 |
// Default size of _task_size_log2 |
|
41 |
static const size_t DEFAULT_TASK_SIZE_LOG2 = 12; |
|
42 |
||
43 |
// The table is split into ranges, every increment is one range. |
|
44 |
volatile size_t _next_to_claim; |
|
45 |
size_t _task_size_log2; // Number of buckets. |
|
46 |
size_t _stop_task; // Last task |
|
47 |
size_t _size_log2; // Table size. |
|
50608
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
48 |
bool _is_mt; |
50158 | 49 |
|
50608
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
50 |
BucketsOperation(ConcurrentHashTable<VALUE, CONFIG, F>* cht, bool is_mt = false) |
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
51 |
: _cht(cht), _is_mt(is_mt), _next_to_claim(0), _task_size_log2(DEFAULT_TASK_SIZE_LOG2), |
50158 | 52 |
_stop_task(0), _size_log2(0) {} |
53 |
||
54 |
// Returns true if you succeeded to claim the range start -> (stop-1). |
|
55 |
bool claim(size_t* start, size_t* stop) { |
|
56 |
size_t claimed = Atomic::add((size_t)1, &_next_to_claim) - 1; |
|
57 |
if (claimed >= _stop_task) { |
|
58 |
return false; |
|
59 |
} |
|
60 |
*start = claimed * (((size_t)1) << _task_size_log2); |
|
61 |
*stop = ((*start) + (((size_t)1) << _task_size_log2)); |
|
62 |
return true; |
|
63 |
} |
|
64 |
||
65 |
// Calculate starting values. |
|
66 |
void setup() { |
|
67 |
_size_log2 = _cht->_table->_log2_size; |
|
50445
bd6b78feb6a3
8195097: Make it possible to process StringTable outside safepoint
rehn
parents:
50158
diff
changeset
|
68 |
_task_size_log2 = MIN2(_task_size_log2, _size_log2); |
50158 | 69 |
size_t tmp = _size_log2 > _task_size_log2 ? |
70 |
_size_log2 - _task_size_log2 : 0; |
|
71 |
_stop_task = (((size_t)1) << tmp); |
|
72 |
} |
|
73 |
||
74 |
// Returns false if all ranges are claimed. |
|
75 |
bool have_more_work() { |
|
76 |
return OrderAccess::load_acquire(&_next_to_claim) >= _stop_task; |
|
77 |
} |
|
78 |
||
79 |
// If we have changed size. |
|
80 |
bool is_same_table() { |
|
81 |
// Not entirely true. |
|
82 |
return _size_log2 != _cht->_table->_log2_size; |
|
83 |
} |
|
84 |
||
85 |
void thread_owns_resize_lock(Thread* thread) { |
|
86 |
assert(BucketsOperation::_cht->_resize_lock_owner == thread, |
|
87 |
"Should be locked by me"); |
|
88 |
assert(BucketsOperation::_cht->_resize_lock->owned_by_self(), |
|
89 |
"Operations lock not held"); |
|
90 |
} |
|
91 |
void thread_owns_only_state_lock(Thread* thread) { |
|
92 |
assert(BucketsOperation::_cht->_resize_lock_owner == thread, |
|
93 |
"Should be locked by me"); |
|
94 |
assert(!BucketsOperation::_cht->_resize_lock->owned_by_self(), |
|
95 |
"Operations lock held"); |
|
96 |
} |
|
97 |
void thread_do_not_own_resize_lock(Thread* thread) { |
|
98 |
assert(!BucketsOperation::_cht->_resize_lock->owned_by_self(), |
|
99 |
"Operations lock held"); |
|
100 |
assert(BucketsOperation::_cht->_resize_lock_owner != thread, |
|
101 |
"Should not be locked by me"); |
|
102 |
} |
|
103 |
}; |
|
104 |
||
105 |
// For doing pausable/parallel bulk delete. |
|
106 |
template <typename VALUE, typename CONFIG, MEMFLAGS F> |
|
107 |
class ConcurrentHashTable<VALUE, CONFIG, F>::BulkDeleteTask : |
|
108 |
public BucketsOperation |
|
109 |
{ |
|
110 |
public: |
|
50608
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
111 |
BulkDeleteTask(ConcurrentHashTable<VALUE, CONFIG, F>* cht, bool is_mt = false) |
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
112 |
: BucketsOperation(cht, is_mt) { |
50158 | 113 |
} |
114 |
// Before start prepare must be called. |
|
115 |
bool prepare(Thread* thread) { |
|
116 |
bool lock = BucketsOperation::_cht->try_resize_lock(thread); |
|
117 |
if (!lock) { |
|
118 |
return false; |
|
119 |
} |
|
120 |
this->setup(); |
|
121 |
this->thread_owns_resize_lock(thread); |
|
122 |
return true; |
|
123 |
} |
|
124 |
||
125 |
// Does one range destroying all matching EVALUATE_FUNC and |
|
126 |
// DELETE_FUNC is called be destruction. Returns true if there is more work. |
|
127 |
template <typename EVALUATE_FUNC, typename DELETE_FUNC> |
|
50608
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
128 |
bool do_task(Thread* thread, EVALUATE_FUNC& eval_f, DELETE_FUNC& del_f) { |
50158 | 129 |
size_t start, stop; |
130 |
assert(BucketsOperation::_cht->_resize_lock_owner != NULL, |
|
131 |
"Should be locked"); |
|
132 |
if (!this->claim(&start, &stop)) { |
|
133 |
return false; |
|
134 |
} |
|
135 |
BucketsOperation::_cht->do_bulk_delete_locked_for(thread, start, stop, |
|
50608
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
136 |
eval_f, del_f, |
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
137 |
BucketsOperation::_is_mt); |
50158 | 138 |
return true; |
139 |
} |
|
140 |
||
141 |
// Pauses this operations for a safepoint. |
|
142 |
void pause(Thread* thread) { |
|
143 |
this->thread_owns_resize_lock(thread); |
|
144 |
// This leaves internal state locked. |
|
145 |
BucketsOperation::_cht->unlock_resize_lock(thread); |
|
146 |
this->thread_do_not_own_resize_lock(thread); |
|
147 |
} |
|
148 |
||
149 |
// Continues this operations after a safepoint. |
|
150 |
bool cont(Thread* thread) { |
|
151 |
this->thread_do_not_own_resize_lock(thread); |
|
152 |
if (!BucketsOperation::_cht->try_resize_lock(thread)) { |
|
153 |
this->thread_do_not_own_resize_lock(thread); |
|
154 |
return false; |
|
155 |
} |
|
156 |
if (BucketsOperation::is_same_table()) { |
|
157 |
BucketsOperation::_cht->unlock_resize_lock(thread); |
|
158 |
this->thread_do_not_own_resize_lock(thread); |
|
159 |
return false; |
|
160 |
} |
|
161 |
this->thread_owns_resize_lock(thread); |
|
162 |
return true; |
|
163 |
} |
|
164 |
||
165 |
// Must be called after ranges are done. |
|
166 |
void done(Thread* thread) { |
|
167 |
this->thread_owns_resize_lock(thread); |
|
168 |
BucketsOperation::_cht->unlock_resize_lock(thread); |
|
169 |
this->thread_do_not_own_resize_lock(thread); |
|
170 |
} |
|
171 |
}; |
|
172 |
||
173 |
template <typename VALUE, typename CONFIG, MEMFLAGS F> |
|
174 |
class ConcurrentHashTable<VALUE, CONFIG, F>::GrowTask : |
|
175 |
public BucketsOperation |
|
176 |
{ |
|
177 |
public: |
|
178 |
GrowTask(ConcurrentHashTable<VALUE, CONFIG, F>* cht) : BucketsOperation(cht) { |
|
179 |
} |
|
180 |
// Before start prepare must be called. |
|
181 |
bool prepare(Thread* thread) { |
|
182 |
if (!BucketsOperation::_cht->internal_grow_prolog( |
|
183 |
thread, BucketsOperation::_cht->_log2_size_limit)) { |
|
184 |
return false; |
|
185 |
} |
|
186 |
this->thread_owns_resize_lock(thread); |
|
187 |
BucketsOperation::setup(); |
|
188 |
return true; |
|
189 |
} |
|
190 |
||
191 |
// Re-sizes a portion of the table. Returns true if there is more work. |
|
50608
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
192 |
bool do_task(Thread* thread) { |
50158 | 193 |
size_t start, stop; |
194 |
assert(BucketsOperation::_cht->_resize_lock_owner != NULL, |
|
195 |
"Should be locked"); |
|
196 |
if (!this->claim(&start, &stop)) { |
|
197 |
return false; |
|
198 |
} |
|
199 |
BucketsOperation::_cht->internal_grow_range(thread, start, stop); |
|
200 |
assert(BucketsOperation::_cht->_resize_lock_owner != NULL, |
|
201 |
"Should be locked"); |
|
202 |
return true; |
|
203 |
} |
|
204 |
||
205 |
// Pauses growing for safepoint |
|
206 |
void pause(Thread* thread) { |
|
207 |
// This leaves internal state locked. |
|
208 |
this->thread_owns_resize_lock(thread); |
|
209 |
BucketsOperation::_cht->_resize_lock->unlock(); |
|
210 |
this->thread_owns_only_state_lock(thread); |
|
211 |
} |
|
212 |
||
213 |
// Continues growing after safepoint. |
|
214 |
void cont(Thread* thread) { |
|
215 |
this->thread_owns_only_state_lock(thread); |
|
216 |
// If someone slips in here directly after safepoint. |
|
217 |
while (!BucketsOperation::_cht->_resize_lock->try_lock()) |
|
218 |
{ /* for ever */ }; |
|
219 |
this->thread_owns_resize_lock(thread); |
|
220 |
} |
|
221 |
||
50608
1609a43e77ae
8204857: ConcurrentHashTable: Fix parallel processing
rehn
parents:
50445
diff
changeset
|
222 |
// Must be called after do_task returns false. |
50158 | 223 |
void done(Thread* thread) { |
224 |
this->thread_owns_resize_lock(thread); |
|
225 |
BucketsOperation::_cht->internal_grow_epilog(thread); |
|
226 |
this->thread_do_not_own_resize_lock(thread); |
|
227 |
} |
|
228 |
}; |
|
229 |
||
230 |
#endif // include guard |