author | chegar |
Thu, 17 Oct 2019 20:54:25 +0100 | |
branch | datagramsocketimpl-branch |
changeset 58679 | 9c3209ff7550 |
parent 58678 | 9cf78a70fa4f |
parent 58014 | aba258cd7df8 |
permissions | -rw-r--r-- |
50113 | 1 |
/* |
55571
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
2 |
* Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved. |
50113 | 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 |
#include "precompiled.hpp" |
|
58014
aba258cd7df8
8229189: Improve JFR leak profiler tracing to deal with discontiguous heaps
eosterlund
parents:
57979
diff
changeset
|
25 |
#include "jfr/leakprofiler/chains/bitset.inline.hpp" |
50113 | 26 |
#include "jfr/leakprofiler/chains/bfsClosure.hpp" |
27 |
#include "jfr/leakprofiler/chains/dfsClosure.hpp" |
|
28 |
#include "jfr/leakprofiler/chains/edge.hpp" |
|
29 |
#include "jfr/leakprofiler/chains/edgeStore.hpp" |
|
30 |
#include "jfr/leakprofiler/chains/edgeQueue.hpp" |
|
31 |
#include "jfr/leakprofiler/utilities/granularTimer.hpp" |
|
32 |
#include "jfr/leakprofiler/utilities/unifiedOop.hpp" |
|
33 |
#include "logging/log.hpp" |
|
50752 | 34 |
#include "memory/iterator.inline.hpp" |
50113 | 35 |
#include "memory/resourceArea.hpp" |
36 |
#include "oops/access.inline.hpp" |
|
37 |
#include "oops/oop.inline.hpp" |
|
38 |
#include "utilities/align.hpp" |
|
39 |
||
40 |
BFSClosure::BFSClosure(EdgeQueue* edge_queue, EdgeStore* edge_store, BitSet* mark_bits) : |
|
41 |
_edge_queue(edge_queue), |
|
42 |
_edge_store(edge_store), |
|
43 |
_mark_bits(mark_bits), |
|
44 |
_current_parent(NULL), |
|
45 |
_current_frontier_level(0), |
|
46 |
_next_frontier_idx(0), |
|
47 |
_prev_frontier_idx(0), |
|
48 |
_dfs_fallback_idx(0), |
|
49 |
_use_dfs(false) { |
|
50 |
} |
|
51 |
||
52 |
static void log_frontier_level_summary(size_t level, |
|
53 |
size_t high_idx, |
|
54 |
size_t low_idx, |
|
55 |
size_t edge_size) { |
|
56 |
const size_t nof_edges_in_frontier = high_idx - low_idx; |
|
57 |
log_trace(jfr, system)( |
|
58 |
"BFS front: " SIZE_FORMAT " edges: " SIZE_FORMAT " size: " SIZE_FORMAT " [KB]", |
|
59 |
level, |
|
60 |
nof_edges_in_frontier, |
|
61 |
(nof_edges_in_frontier * edge_size) / K |
|
62 |
); |
|
63 |
} |
|
64 |
||
65 |
void BFSClosure::log_completed_frontier() const { |
|
66 |
log_frontier_level_summary(_current_frontier_level, |
|
67 |
_next_frontier_idx, |
|
68 |
_prev_frontier_idx, |
|
69 |
_edge_queue->sizeof_edge()); |
|
70 |
} |
|
71 |
||
72 |
void BFSClosure::log_dfs_fallback() const { |
|
73 |
const size_t edge_size = _edge_queue->sizeof_edge(); |
|
74 |
// first complete summary for frontier in progress |
|
75 |
log_frontier_level_summary(_current_frontier_level, |
|
76 |
_next_frontier_idx, |
|
77 |
_prev_frontier_idx, |
|
78 |
edge_size); |
|
79 |
||
80 |
// and then also complete the last frontier |
|
81 |
log_frontier_level_summary(_current_frontier_level + 1, |
|
82 |
_edge_queue->bottom(), |
|
83 |
_next_frontier_idx, |
|
84 |
edge_size); |
|
85 |
||
86 |
// additional information about DFS fallover |
|
87 |
log_trace(jfr, system)( |
|
88 |
"BFS front: " SIZE_FORMAT " filled edge queue at edge: " SIZE_FORMAT, |
|
89 |
_current_frontier_level, |
|
90 |
_dfs_fallback_idx |
|
91 |
); |
|
92 |
||
93 |
const size_t nof_dfs_completed_edges = _edge_queue->bottom() - _dfs_fallback_idx; |
|
94 |
log_trace(jfr, system)( |
|
95 |
"DFS to complete " SIZE_FORMAT " edges size: " SIZE_FORMAT " [KB]", |
|
96 |
nof_dfs_completed_edges, |
|
97 |
(nof_dfs_completed_edges * edge_size) / K |
|
98 |
); |
|
99 |
} |
|
100 |
||
101 |
void BFSClosure::process() { |
|
102 |
process_root_set(); |
|
103 |
process_queue(); |
|
104 |
} |
|
105 |
||
106 |
void BFSClosure::process_root_set() { |
|
107 |
for (size_t idx = _edge_queue->bottom(); idx < _edge_queue->top(); ++idx) { |
|
108 |
const Edge* edge = _edge_queue->element_at(idx); |
|
109 |
assert(edge->parent() == NULL, "invariant"); |
|
110 |
process(edge->reference(), edge->pointee()); |
|
111 |
} |
|
112 |
} |
|
113 |
||
114 |
void BFSClosure::process(const oop* reference, const oop pointee) { |
|
115 |
closure_impl(reference, pointee); |
|
116 |
} |
|
117 |
void BFSClosure::closure_impl(const oop* reference, const oop pointee) { |
|
118 |
assert(reference != NULL, "invariant"); |
|
119 |
assert(UnifiedOop::dereference(reference) == pointee, "invariant"); |
|
120 |
||
121 |
if (GranularTimer::is_finished()) { |
|
122 |
return; |
|
123 |
} |
|
124 |
||
125 |
if (_use_dfs) { |
|
126 |
assert(_current_parent != NULL, "invariant"); |
|
127 |
DFSClosure::find_leaks_from_edge(_edge_store, _mark_bits, _current_parent); |
|
128 |
return; |
|
129 |
} |
|
130 |
||
131 |
if (!_mark_bits->is_marked(pointee)) { |
|
132 |
_mark_bits->mark_obj(pointee); |
|
133 |
// is the pointee a sample object? |
|
57777
90ead0febf56
8229258: Rework markOop and markOopDesc into a simpler mark word value carrier
stefank
parents:
55571
diff
changeset
|
134 |
if (NULL == pointee->mark().to_pointer()) { |
50113 | 135 |
add_chain(reference, pointee); |
136 |
} |
|
137 |
||
138 |
// if we are processinig initial root set, don't add to queue |
|
139 |
if (_current_parent != NULL) { |
|
140 |
_edge_queue->add(_current_parent, reference); |
|
141 |
} |
|
142 |
||
143 |
if (_edge_queue->is_full()) { |
|
144 |
dfs_fallback(); |
|
145 |
} |
|
146 |
} |
|
147 |
} |
|
148 |
||
149 |
void BFSClosure::add_chain(const oop* reference, const oop pointee) { |
|
150 |
assert(pointee != NULL, "invariant"); |
|
57777
90ead0febf56
8229258: Rework markOop and markOopDesc into a simpler mark word value carrier
stefank
parents:
55571
diff
changeset
|
151 |
assert(NULL == pointee->mark().to_pointer(), "invariant"); |
55571
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
152 |
Edge leak_edge(_current_parent, reference); |
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
153 |
_edge_store->put_chain(&leak_edge, _current_parent == NULL ? 1 : _current_frontier_level + 2); |
50113 | 154 |
} |
155 |
||
156 |
void BFSClosure::dfs_fallback() { |
|
157 |
assert(_edge_queue->is_full(), "invariant"); |
|
158 |
_use_dfs = true; |
|
159 |
_dfs_fallback_idx = _edge_queue->bottom(); |
|
160 |
while (!_edge_queue->is_empty()) { |
|
161 |
const Edge* edge = _edge_queue->remove(); |
|
162 |
if (edge->pointee() != NULL) { |
|
163 |
DFSClosure::find_leaks_from_edge(_edge_store, _mark_bits, edge); |
|
164 |
} |
|
165 |
} |
|
166 |
} |
|
167 |
||
168 |
void BFSClosure::process_queue() { |
|
169 |
assert(_current_frontier_level == 0, "invariant"); |
|
170 |
assert(_next_frontier_idx == 0, "invariant"); |
|
171 |
assert(_prev_frontier_idx == 0, "invariant"); |
|
172 |
||
173 |
_next_frontier_idx = _edge_queue->top(); |
|
174 |
while (!is_complete()) { |
|
175 |
iterate(_edge_queue->remove()); // edge_queue.remove() increments bottom |
|
176 |
} |
|
177 |
} |
|
178 |
||
179 |
void BFSClosure::step_frontier() const { |
|
180 |
log_completed_frontier(); |
|
181 |
++_current_frontier_level; |
|
182 |
_prev_frontier_idx = _next_frontier_idx; |
|
183 |
_next_frontier_idx = _edge_queue->top(); |
|
184 |
} |
|
185 |
||
186 |
bool BFSClosure::is_complete() const { |
|
187 |
if (_edge_queue->bottom() < _next_frontier_idx) { |
|
188 |
return false; |
|
189 |
} |
|
190 |
if (_edge_queue->bottom() > _next_frontier_idx) { |
|
191 |
// fallback onto DFS as part of processing the frontier |
|
192 |
assert(_dfs_fallback_idx >= _prev_frontier_idx, "invariant"); |
|
193 |
assert(_dfs_fallback_idx < _next_frontier_idx, "invariant"); |
|
194 |
log_dfs_fallback(); |
|
195 |
return true; |
|
196 |
} |
|
197 |
assert(_edge_queue->bottom() == _next_frontier_idx, "invariant"); |
|
198 |
if (_edge_queue->is_empty()) { |
|
199 |
return true; |
|
200 |
} |
|
201 |
step_frontier(); |
|
202 |
return false; |
|
203 |
} |
|
204 |
||
205 |
void BFSClosure::iterate(const Edge* parent) { |
|
206 |
assert(parent != NULL, "invariant"); |
|
207 |
const oop pointee = parent->pointee(); |
|
208 |
assert(pointee != NULL, "invariant"); |
|
209 |
_current_parent = parent; |
|
210 |
pointee->oop_iterate(this); |
|
211 |
} |
|
212 |
||
213 |
void BFSClosure::do_oop(oop* ref) { |
|
214 |
assert(ref != NULL, "invariant"); |
|
215 |
assert(is_aligned(ref, HeapWordSize), "invariant"); |
|
216 |
const oop pointee = *ref; |
|
217 |
if (pointee != NULL) { |
|
218 |
closure_impl(ref, pointee); |
|
219 |
} |
|
220 |
} |
|
221 |
||
222 |
void BFSClosure::do_oop(narrowOop* ref) { |
|
223 |
assert(ref != NULL, "invariant"); |
|
224 |
assert(is_aligned(ref, sizeof(narrowOop)), "invariant"); |
|
225 |
const oop pointee = RawAccess<>::oop_load(ref); |
|
226 |
if (pointee != NULL) { |
|
227 |
closure_impl(UnifiedOop::encode(ref), pointee); |
|
228 |
} |
|
229 |
} |
|
55571
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
230 |
|
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
231 |
void BFSClosure::do_root(const oop* ref) { |
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
232 |
assert(ref != NULL, "invariant"); |
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
233 |
if (!_edge_queue->is_full()) { |
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
234 |
_edge_queue->add(NULL, ref); |
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
235 |
} |
49102ba8cf14
8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
mgronlun
parents:
50752
diff
changeset
|
236 |
} |