Mercurial > hg > truffle
annotate src/share/vm/runtime/sweeper.cpp @ 3763:e66f38dd58a9
Merge
author | ysr |
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date | Wed, 08 Jun 2011 08:39:53 -0700 |
parents | f52ed367b66d |
children | dc7902820c9b cfdfbeac0a5b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/codeCache.hpp" | |
27 #include "code/nmethod.hpp" | |
28 #include "compiler/compileBroker.hpp" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "oops/methodOop.hpp" | |
31 #include "runtime/atomic.hpp" | |
32 #include "runtime/compilationPolicy.hpp" | |
33 #include "runtime/mutexLocker.hpp" | |
34 #include "runtime/os.hpp" | |
35 #include "runtime/sweeper.hpp" | |
36 #include "runtime/vm_operations.hpp" | |
37 #include "utilities/events.hpp" | |
38 #include "utilities/xmlstream.hpp" | |
0 | 39 |
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40 #ifdef ASSERT |
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41 |
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42 #define SWEEP(nm) record_sweep(nm, __LINE__) |
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43 // Sweeper logging code |
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44 class SweeperRecord { |
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45 public: |
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46 int traversal; |
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47 int invocation; |
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48 int compile_id; |
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49 long traversal_mark; |
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50 int state; |
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51 const char* kind; |
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52 address vep; |
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53 address uep; |
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54 int line; |
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55 |
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56 void print() { |
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57 tty->print_cr("traversal = %d invocation = %d compile_id = %d %s uep = " PTR_FORMAT " vep = " |
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58 PTR_FORMAT " state = %d traversal_mark %d line = %d", |
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59 traversal, |
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60 invocation, |
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61 compile_id, |
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62 kind == NULL ? "" : kind, |
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63 uep, |
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64 vep, |
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65 state, |
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66 traversal_mark, |
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67 line); |
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68 } |
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69 }; |
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70 |
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71 static int _sweep_index = 0; |
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72 static SweeperRecord* _records = NULL; |
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73 |
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74 void NMethodSweeper::report_events(int id, address entry) { |
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75 if (_records != NULL) { |
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76 for (int i = _sweep_index; i < SweeperLogEntries; i++) { |
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77 if (_records[i].uep == entry || |
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78 _records[i].vep == entry || |
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79 _records[i].compile_id == id) { |
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80 _records[i].print(); |
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81 } |
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82 } |
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83 for (int i = 0; i < _sweep_index; i++) { |
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84 if (_records[i].uep == entry || |
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85 _records[i].vep == entry || |
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86 _records[i].compile_id == id) { |
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87 _records[i].print(); |
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88 } |
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89 } |
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90 } |
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91 } |
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92 |
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93 void NMethodSweeper::report_events() { |
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94 if (_records != NULL) { |
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95 for (int i = _sweep_index; i < SweeperLogEntries; i++) { |
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96 // skip empty records |
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97 if (_records[i].vep == NULL) continue; |
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98 _records[i].print(); |
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99 } |
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100 for (int i = 0; i < _sweep_index; i++) { |
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101 // skip empty records |
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102 if (_records[i].vep == NULL) continue; |
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103 _records[i].print(); |
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104 } |
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105 } |
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106 } |
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107 |
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108 void NMethodSweeper::record_sweep(nmethod* nm, int line) { |
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109 if (_records != NULL) { |
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110 _records[_sweep_index].traversal = _traversals; |
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111 _records[_sweep_index].traversal_mark = nm->_stack_traversal_mark; |
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112 _records[_sweep_index].invocation = _invocations; |
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113 _records[_sweep_index].compile_id = nm->compile_id(); |
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114 _records[_sweep_index].kind = nm->compile_kind(); |
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115 _records[_sweep_index].state = nm->_state; |
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116 _records[_sweep_index].vep = nm->verified_entry_point(); |
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117 _records[_sweep_index].uep = nm->entry_point(); |
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118 _records[_sweep_index].line = line; |
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119 |
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120 _sweep_index = (_sweep_index + 1) % SweeperLogEntries; |
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121 } |
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122 } |
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123 #else |
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124 #define SWEEP(nm) |
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125 #endif |
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126 |
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127 |
0 | 128 long NMethodSweeper::_traversals = 0; // No. of stack traversals performed |
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129 nmethod* NMethodSweeper::_current = NULL; // Current nmethod |
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130 int NMethodSweeper::_seen = 0 ; // No. of nmethods we have currently processed in current pass of CodeCache |
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131 |
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132 volatile int NMethodSweeper::_invocations = 0; // No. of invocations left until we are completed with this pass |
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133 volatile int NMethodSweeper::_sweep_started = 0; // Whether a sweep is in progress. |
0 | 134 |
135 jint NMethodSweeper::_locked_seen = 0; | |
136 jint NMethodSweeper::_not_entrant_seen_on_stack = 0; | |
137 bool NMethodSweeper::_rescan = false; | |
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138 bool NMethodSweeper::_do_sweep = false; |
1202 | 139 bool NMethodSweeper::_was_full = false; |
140 jint NMethodSweeper::_advise_to_sweep = 0; | |
141 jlong NMethodSweeper::_last_was_full = 0; | |
142 uint NMethodSweeper::_highest_marked = 0; | |
143 long NMethodSweeper::_was_full_traversal = 0; | |
0 | 144 |
989 | 145 class MarkActivationClosure: public CodeBlobClosure { |
146 public: | |
147 virtual void do_code_blob(CodeBlob* cb) { | |
148 // If we see an activation belonging to a non_entrant nmethod, we mark it. | |
149 if (cb->is_nmethod() && ((nmethod*)cb)->is_not_entrant()) { | |
150 ((nmethod*)cb)->mark_as_seen_on_stack(); | |
151 } | |
152 } | |
153 }; | |
154 static MarkActivationClosure mark_activation_closure; | |
155 | |
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156 void NMethodSweeper::scan_stacks() { |
0 | 157 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint"); |
158 if (!MethodFlushing) return; | |
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159 _do_sweep = true; |
0 | 160 |
161 // No need to synchronize access, since this is always executed at a | |
162 // safepoint. If we aren't in the middle of scan and a rescan | |
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163 // hasn't been requested then just return. If UseCodeCacheFlushing is on and |
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164 // code cache flushing is in progress, don't skip sweeping to help make progress |
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165 // clearing space in the code cache. |
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166 if ((_current == NULL && !_rescan) && !(UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs())) { |
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167 _do_sweep = false; |
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168 return; |
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169 } |
0 | 170 |
171 // Make sure CompiledIC_lock in unlocked, since we might update some | |
172 // inline caches. If it is, we just bail-out and try later. | |
173 if (CompiledIC_lock->is_locked() || Patching_lock->is_locked()) return; | |
174 | |
175 // Check for restart | |
176 assert(CodeCache::find_blob_unsafe(_current) == _current, "Sweeper nmethod cached state invalid"); | |
177 if (_current == NULL) { | |
178 _seen = 0; | |
179 _invocations = NmethodSweepFraction; | |
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180 _current = CodeCache::first_nmethod(); |
0 | 181 _traversals += 1; |
182 if (PrintMethodFlushing) { | |
183 tty->print_cr("### Sweep: stack traversal %d", _traversals); | |
184 } | |
989 | 185 Threads::nmethods_do(&mark_activation_closure); |
0 | 186 |
187 // reset the flags since we started a scan from the beginning. | |
188 _rescan = false; | |
189 _locked_seen = 0; | |
190 _not_entrant_seen_on_stack = 0; | |
191 } | |
192 | |
1202 | 193 if (UseCodeCacheFlushing) { |
194 if (!CodeCache::needs_flushing()) { | |
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195 // scan_stacks() runs during a safepoint, no race with setters |
1202 | 196 _advise_to_sweep = 0; |
197 } | |
198 | |
199 if (was_full()) { | |
200 // There was some progress so attempt to restart the compiler | |
201 jlong now = os::javaTimeMillis(); | |
202 jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000; | |
203 jlong curr_interval = now - _last_was_full; | |
204 if ((!CodeCache::needs_flushing()) && (curr_interval > max_interval)) { | |
205 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation); | |
206 set_was_full(false); | |
207 | |
208 // Update the _last_was_full time so we can tell how fast the | |
209 // code cache is filling up | |
210 _last_was_full = os::javaTimeMillis(); | |
211 | |
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212 log_sweep("restart_compiler"); |
1202 | 213 } |
214 } | |
215 } | |
0 | 216 } |
217 | |
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218 void NMethodSweeper::possibly_sweep() { |
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219 assert(JavaThread::current()->thread_state() == _thread_in_vm, "must run in vm mode"); |
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220 if ((!MethodFlushing) || (!_do_sweep)) return; |
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221 |
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222 if (_invocations > 0) { |
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223 // Only one thread at a time will sweep |
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224 jint old = Atomic::cmpxchg( 1, &_sweep_started, 0 ); |
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225 if (old != 0) { |
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226 return; |
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227 } |
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228 #ifdef ASSERT |
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229 if (LogSweeper && _records == NULL) { |
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230 // Create the ring buffer for the logging code |
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231 _records = NEW_C_HEAP_ARRAY(SweeperRecord, SweeperLogEntries); |
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232 memset(_records, 0, sizeof(SweeperRecord) * SweeperLogEntries); |
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233 } |
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234 #endif |
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235 if (_invocations > 0) { |
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236 sweep_code_cache(); |
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237 _invocations--; |
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238 } |
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239 _sweep_started = 0; |
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240 } |
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241 } |
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242 |
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243 void NMethodSweeper::sweep_code_cache() { |
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244 #ifdef ASSERT |
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245 jlong sweep_start; |
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246 if (PrintMethodFlushing) { |
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247 sweep_start = os::javaTimeMillis(); |
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248 } |
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249 #endif |
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250 if (PrintMethodFlushing && Verbose) { |
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251 tty->print_cr("### Sweep at %d out of %d. Invocations left: %d", _seen, CodeCache::nof_nmethods(), _invocations); |
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252 } |
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253 |
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254 // We want to visit all nmethods after NmethodSweepFraction |
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255 // invocations so divide the remaining number of nmethods by the |
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256 // remaining number of invocations. This is only an estimate since |
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257 // the number of nmethods changes during the sweep so the final |
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258 // stage must iterate until it there are no more nmethods. |
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259 int todo = (CodeCache::nof_nmethods() - _seen) / _invocations; |
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260 |
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261 assert(!SafepointSynchronize::is_at_safepoint(), "should not be in safepoint when we get here"); |
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262 assert(!CodeCache_lock->owned_by_self(), "just checking"); |
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263 |
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264 { |
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265 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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266 |
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267 // The last invocation iterates until there are no more nmethods |
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268 for (int i = 0; (i < todo || _invocations == 1) && _current != NULL; i++) { |
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269 |
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270 // Since we will give up the CodeCache_lock, always skip ahead |
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271 // to the next nmethod. Other blobs can be deleted by other |
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272 // threads but nmethods are only reclaimed by the sweeper. |
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273 nmethod* next = CodeCache::next_nmethod(_current); |
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274 |
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275 // Now ready to process nmethod and give up CodeCache_lock |
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276 { |
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277 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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278 process_nmethod(_current); |
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279 } |
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280 _seen++; |
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281 _current = next; |
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282 } |
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283 } |
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284 |
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285 assert(_invocations > 1 || _current == NULL, "must have scanned the whole cache"); |
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286 |
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287 if (_current == NULL && !_rescan && (_locked_seen || _not_entrant_seen_on_stack)) { |
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288 // we've completed a scan without making progress but there were |
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289 // nmethods we were unable to process either because they were |
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290 // locked or were still on stack. We don't have to aggresively |
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291 // clean them up so just stop scanning. We could scan once more |
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292 // but that complicates the control logic and it's unlikely to |
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293 // matter much. |
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294 if (PrintMethodFlushing) { |
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295 tty->print_cr("### Couldn't make progress on some nmethods so stopping sweep"); |
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296 } |
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297 } |
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298 |
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299 #ifdef ASSERT |
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300 if(PrintMethodFlushing) { |
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301 jlong sweep_end = os::javaTimeMillis(); |
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302 tty->print_cr("### sweeper: sweep time(%d): " INT64_FORMAT, _invocations, sweep_end - sweep_start); |
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303 } |
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304 #endif |
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305 |
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306 if (_invocations == 1) { |
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307 log_sweep("finished"); |
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308 } |
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309 } |
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310 |
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311 class NMethodMarker: public StackObj { |
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312 private: |
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313 CompilerThread* _thread; |
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314 public: |
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315 NMethodMarker(nmethod* nm) { |
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316 _thread = CompilerThread::current(); |
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317 _thread->set_scanned_nmethod(nm); |
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318 } |
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319 ~NMethodMarker() { |
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320 _thread->set_scanned_nmethod(NULL); |
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321 } |
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322 }; |
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323 |
0 | 324 |
325 void NMethodSweeper::process_nmethod(nmethod *nm) { | |
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326 assert(!CodeCache_lock->owned_by_self(), "just checking"); |
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327 |
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328 // Make sure this nmethod doesn't get unloaded during the scan, |
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329 // since the locks acquired below might safepoint. |
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330 NMethodMarker nmm(nm); |
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331 |
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332 SWEEP(nm); |
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333 |
0 | 334 // Skip methods that are currently referenced by the VM |
335 if (nm->is_locked_by_vm()) { | |
336 // But still remember to clean-up inline caches for alive nmethods | |
337 if (nm->is_alive()) { | |
338 // Clean-up all inline caches that points to zombie/non-reentrant methods | |
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339 MutexLocker cl(CompiledIC_lock); |
0 | 340 nm->cleanup_inline_caches(); |
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341 SWEEP(nm); |
0 | 342 } else { |
343 _locked_seen++; | |
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344 SWEEP(nm); |
0 | 345 } |
346 return; | |
347 } | |
348 | |
349 if (nm->is_zombie()) { | |
350 // If it is first time, we see nmethod then we mark it. Otherwise, | |
351 // we reclame it. When we have seen a zombie method twice, we know that | |
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352 // there are no inline caches that refer to it. |
0 | 353 if (nm->is_marked_for_reclamation()) { |
354 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods"); | |
941 | 355 if (PrintMethodFlushing && Verbose) { |
1202 | 356 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (marked for reclamation) being flushed", nm->compile_id(), nm); |
941 | 357 } |
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358 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
0 | 359 nm->flush(); |
360 } else { | |
941 | 361 if (PrintMethodFlushing && Verbose) { |
1202 | 362 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (zombie) being marked for reclamation", nm->compile_id(), nm); |
941 | 363 } |
0 | 364 nm->mark_for_reclamation(); |
365 _rescan = true; | |
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366 SWEEP(nm); |
0 | 367 } |
368 } else if (nm->is_not_entrant()) { | |
369 // If there is no current activations of this method on the | |
370 // stack we can safely convert it to a zombie method | |
371 if (nm->can_not_entrant_be_converted()) { | |
941 | 372 if (PrintMethodFlushing && Verbose) { |
1202 | 373 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (not entrant) being made zombie", nm->compile_id(), nm); |
941 | 374 } |
0 | 375 nm->make_zombie(); |
376 _rescan = true; | |
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377 SWEEP(nm); |
0 | 378 } else { |
379 // Still alive, clean up its inline caches | |
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380 MutexLocker cl(CompiledIC_lock); |
0 | 381 nm->cleanup_inline_caches(); |
382 // we coudn't transition this nmethod so don't immediately | |
383 // request a rescan. If this method stays on the stack for a | |
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384 // long time we don't want to keep rescanning the code cache. |
0 | 385 _not_entrant_seen_on_stack++; |
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386 SWEEP(nm); |
0 | 387 } |
388 } else if (nm->is_unloaded()) { | |
389 // Unloaded code, just make it a zombie | |
941 | 390 if (PrintMethodFlushing && Verbose) |
1202 | 391 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (unloaded) being made zombie", nm->compile_id(), nm); |
941 | 392 if (nm->is_osr_method()) { |
0 | 393 // No inline caches will ever point to osr methods, so we can just remove it |
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394 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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395 SWEEP(nm); |
0 | 396 nm->flush(); |
397 } else { | |
398 nm->make_zombie(); | |
399 _rescan = true; | |
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400 SWEEP(nm); |
0 | 401 } |
402 } else { | |
403 assert(nm->is_alive(), "should be alive"); | |
1202 | 404 |
405 if (UseCodeCacheFlushing) { | |
406 if ((nm->method()->code() != nm) && !(nm->is_locked_by_vm()) && !(nm->is_osr_method()) && | |
407 (_traversals > _was_full_traversal+2) && (((uint)nm->compile_id()) < _highest_marked) && | |
408 CodeCache::needs_flushing()) { | |
409 // This method has not been called since the forced cleanup happened | |
410 nm->make_not_entrant(); | |
411 } | |
412 } | |
413 | |
0 | 414 // Clean-up all inline caches that points to zombie/non-reentrant methods |
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415 MutexLocker cl(CompiledIC_lock); |
0 | 416 nm->cleanup_inline_caches(); |
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417 SWEEP(nm); |
0 | 418 } |
419 } | |
1202 | 420 |
421 // Code cache unloading: when compilers notice the code cache is getting full, | |
422 // they will call a vm op that comes here. This code attempts to speculatively | |
423 // unload the oldest half of the nmethods (based on the compile job id) by | |
424 // saving the old code in a list in the CodeCache. Then | |
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425 // execution resumes. If a method so marked is not called by the second sweeper |
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426 // stack traversal after the current one, the nmethod will be marked non-entrant and |
1202 | 427 // got rid of by normal sweeping. If the method is called, the methodOop's |
428 // _code field is restored and the methodOop/nmethod | |
429 // go back to their normal state. | |
430 void NMethodSweeper::handle_full_code_cache(bool is_full) { | |
431 // Only the first one to notice can advise us to start early cleaning | |
432 if (!is_full){ | |
433 jint old = Atomic::cmpxchg( 1, &_advise_to_sweep, 0 ); | |
434 if (old != 0) { | |
435 return; | |
436 } | |
437 } | |
438 | |
439 if (is_full) { | |
440 // Since code cache is full, immediately stop new compiles | |
441 bool did_set = CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation); | |
442 if (!did_set) { | |
443 // only the first to notice can start the cleaning, | |
444 // others will go back and block | |
445 return; | |
446 } | |
447 set_was_full(true); | |
448 | |
449 // If we run out within MinCodeCacheFlushingInterval of the last unload time, give up | |
450 jlong now = os::javaTimeMillis(); | |
451 jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000; | |
452 jlong curr_interval = now - _last_was_full; | |
453 if (curr_interval < max_interval) { | |
454 _rescan = true; | |
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455 log_sweep("disable_compiler", "flushing_interval='" UINT64_FORMAT "'", |
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456 curr_interval/1000); |
1202 | 457 return; |
458 } | |
459 } | |
460 | |
461 VM_HandleFullCodeCache op(is_full); | |
462 VMThread::execute(&op); | |
463 | |
464 // rescan again as soon as possible | |
465 _rescan = true; | |
466 } | |
467 | |
468 void NMethodSweeper::speculative_disconnect_nmethods(bool is_full) { | |
469 // If there was a race in detecting full code cache, only run | |
470 // one vm op for it or keep the compiler shut off | |
471 | |
472 debug_only(jlong start = os::javaTimeMillis();) | |
473 | |
474 if ((!was_full()) && (is_full)) { | |
475 if (!CodeCache::needs_flushing()) { | |
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476 log_sweep("restart_compiler"); |
1202 | 477 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation); |
478 return; | |
479 } | |
480 } | |
481 | |
482 // Traverse the code cache trying to dump the oldest nmethods | |
483 uint curr_max_comp_id = CompileBroker::get_compilation_id(); | |
484 uint flush_target = ((curr_max_comp_id - _highest_marked) >> 1) + _highest_marked; | |
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485 log_sweep("start_cleaning"); |
1202 | 486 |
487 nmethod* nm = CodeCache::alive_nmethod(CodeCache::first()); | |
488 jint disconnected = 0; | |
489 jint made_not_entrant = 0; | |
490 while ((nm != NULL)){ | |
491 uint curr_comp_id = nm->compile_id(); | |
492 | |
493 // OSR methods cannot be flushed like this. Also, don't flush native methods | |
494 // since they are part of the JDK in most cases | |
495 if (nm->is_in_use() && (!nm->is_osr_method()) && (!nm->is_locked_by_vm()) && | |
496 (!nm->is_native_method()) && ((curr_comp_id < flush_target))) { | |
497 | |
498 if ((nm->method()->code() == nm)) { | |
499 // This method has not been previously considered for | |
500 // unloading or it was restored already | |
501 CodeCache::speculatively_disconnect(nm); | |
502 disconnected++; | |
503 } else if (nm->is_speculatively_disconnected()) { | |
504 // This method was previously considered for preemptive unloading and was not called since then | |
1783 | 505 CompilationPolicy::policy()->delay_compilation(nm->method()); |
1202 | 506 nm->make_not_entrant(); |
507 made_not_entrant++; | |
508 } | |
509 | |
510 if (curr_comp_id > _highest_marked) { | |
511 _highest_marked = curr_comp_id; | |
512 } | |
513 } | |
514 nm = CodeCache::alive_nmethod(CodeCache::next(nm)); | |
515 } | |
516 | |
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517 log_sweep("stop_cleaning", |
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518 "disconnected='" UINT32_FORMAT "' made_not_entrant='" UINT32_FORMAT "'", |
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519 disconnected, made_not_entrant); |
1202 | 520 |
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521 // Shut off compiler. Sweeper will start over with a new stack scan and |
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522 // traversal cycle and turn it back on if it clears enough space. |
1202 | 523 if (was_full()) { |
524 _last_was_full = os::javaTimeMillis(); | |
525 CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation); | |
526 } | |
527 | |
528 // After two more traversals the sweeper will get rid of unrestored nmethods | |
529 _was_full_traversal = _traversals; | |
530 #ifdef ASSERT | |
531 jlong end = os::javaTimeMillis(); | |
532 if(PrintMethodFlushing && Verbose) { | |
533 tty->print_cr("### sweeper: unload time: " INT64_FORMAT, end-start); | |
534 } | |
535 #endif | |
536 } | |
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537 |
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538 |
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539 // Print out some state information about the current sweep and the |
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540 // state of the code cache if it's requested. |
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541 void NMethodSweeper::log_sweep(const char* msg, const char* format, ...) { |
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542 if (PrintMethodFlushing) { |
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543 stringStream s; |
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544 // Dump code cache state into a buffer before locking the tty, |
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545 // because log_state() will use locks causing lock conflicts. |
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546 CodeCache::log_state(&s); |
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547 |
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548 ttyLocker ttyl; |
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549 tty->print("### sweeper: %s ", msg); |
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550 if (format != NULL) { |
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551 va_list ap; |
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552 va_start(ap, format); |
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553 tty->vprint(format, ap); |
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554 va_end(ap); |
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555 } |
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556 tty->print_cr(s.as_string()); |
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557 } |
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558 |
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559 if (LogCompilation && (xtty != NULL)) { |
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560 stringStream s; |
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561 // Dump code cache state into a buffer before locking the tty, |
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562 // because log_state() will use locks causing lock conflicts. |
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563 CodeCache::log_state(&s); |
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564 |
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565 ttyLocker ttyl; |
1646 | 566 xtty->begin_elem("sweeper state='%s' traversals='" INTX_FORMAT "' ", msg, (intx)traversal_count()); |
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567 if (format != NULL) { |
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568 va_list ap; |
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569 va_start(ap, format); |
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570 xtty->vprint(format, ap); |
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571 va_end(ap); |
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572 } |
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573 xtty->print(s.as_string()); |
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574 xtty->stamp(); |
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575 xtty->end_elem(); |
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576 } |
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577 } |