Mercurial > hg > truffle
annotate src/share/vm/runtime/sweeper.cpp @ 7598:f9bda35f4226
8005816: Shark: fix volatile float field access
Reviewed-by: twisti
Contributed-by: Roman Kennke <rkennke@redhat.com>
author | twisti |
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date | Fri, 11 Jan 2013 16:47:23 -0800 |
parents | da91efe96a93 |
children | e522a00b91aa 0cfa93c2fcc4 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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" | |
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27 #include "code/compiledIC.hpp" |
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28 #include "code/icBuffer.hpp" |
1972 | 29 #include "code/nmethod.hpp" |
30 #include "compiler/compileBroker.hpp" | |
31 #include "memory/resourceArea.hpp" | |
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32 #include "oops/method.hpp" |
1972 | 33 #include "runtime/atomic.hpp" |
34 #include "runtime/compilationPolicy.hpp" | |
35 #include "runtime/mutexLocker.hpp" | |
36 #include "runtime/os.hpp" | |
37 #include "runtime/sweeper.hpp" | |
38 #include "runtime/vm_operations.hpp" | |
39 #include "utilities/events.hpp" | |
40 #include "utilities/xmlstream.hpp" | |
0 | 41 |
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42 #ifdef ASSERT |
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43 |
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44 #define SWEEP(nm) record_sweep(nm, __LINE__) |
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45 // Sweeper logging code |
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46 class SweeperRecord { |
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47 public: |
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48 int traversal; |
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49 int invocation; |
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50 int compile_id; |
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51 long traversal_mark; |
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52 int state; |
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53 const char* kind; |
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54 address vep; |
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55 address uep; |
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56 int line; |
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57 |
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58 void print() { |
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59 tty->print_cr("traversal = %d invocation = %d compile_id = %d %s uep = " PTR_FORMAT " vep = " |
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60 PTR_FORMAT " state = %d traversal_mark %d line = %d", |
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61 traversal, |
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62 invocation, |
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63 compile_id, |
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64 kind == NULL ? "" : kind, |
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65 uep, |
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66 vep, |
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67 state, |
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68 traversal_mark, |
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69 line); |
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70 } |
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71 }; |
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72 |
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73 static int _sweep_index = 0; |
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74 static SweeperRecord* _records = NULL; |
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75 |
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76 void NMethodSweeper::report_events(int id, address entry) { |
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77 if (_records != NULL) { |
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78 for (int i = _sweep_index; i < SweeperLogEntries; i++) { |
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79 if (_records[i].uep == entry || |
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80 _records[i].vep == entry || |
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81 _records[i].compile_id == id) { |
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82 _records[i].print(); |
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83 } |
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84 } |
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85 for (int i = 0; i < _sweep_index; i++) { |
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86 if (_records[i].uep == entry || |
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87 _records[i].vep == entry || |
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88 _records[i].compile_id == id) { |
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89 _records[i].print(); |
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90 } |
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91 } |
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92 } |
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93 } |
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94 |
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95 void NMethodSweeper::report_events() { |
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96 if (_records != NULL) { |
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97 for (int i = _sweep_index; i < SweeperLogEntries; i++) { |
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98 // skip empty records |
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99 if (_records[i].vep == NULL) continue; |
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100 _records[i].print(); |
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101 } |
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102 for (int i = 0; i < _sweep_index; i++) { |
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103 // skip empty records |
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104 if (_records[i].vep == NULL) continue; |
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105 _records[i].print(); |
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106 } |
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107 } |
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108 } |
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109 |
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110 void NMethodSweeper::record_sweep(nmethod* nm, int line) { |
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111 if (_records != NULL) { |
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112 _records[_sweep_index].traversal = _traversals; |
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113 _records[_sweep_index].traversal_mark = nm->_stack_traversal_mark; |
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114 _records[_sweep_index].invocation = _invocations; |
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115 _records[_sweep_index].compile_id = nm->compile_id(); |
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116 _records[_sweep_index].kind = nm->compile_kind(); |
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117 _records[_sweep_index].state = nm->_state; |
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118 _records[_sweep_index].vep = nm->verified_entry_point(); |
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119 _records[_sweep_index].uep = nm->entry_point(); |
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120 _records[_sweep_index].line = line; |
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121 |
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122 _sweep_index = (_sweep_index + 1) % SweeperLogEntries; |
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123 } |
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124 } |
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125 #else |
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126 #define SWEEP(nm) |
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127 #endif |
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128 |
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129 |
0 | 130 long NMethodSweeper::_traversals = 0; // No. of stack traversals performed |
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131 nmethod* NMethodSweeper::_current = NULL; // Current nmethod |
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132 int NMethodSweeper::_seen = 0 ; // No. of nmethods we have currently processed in current pass of CodeCache |
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133 |
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134 volatile int NMethodSweeper::_invocations = 0; // No. of invocations left until we are completed with this pass |
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135 volatile int NMethodSweeper::_sweep_started = 0; // Whether a sweep is in progress. |
0 | 136 |
137 jint NMethodSweeper::_locked_seen = 0; | |
138 jint NMethodSweeper::_not_entrant_seen_on_stack = 0; | |
139 bool NMethodSweeper::_rescan = false; | |
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140 bool NMethodSweeper::_do_sweep = false; |
1202 | 141 bool NMethodSweeper::_was_full = false; |
142 jint NMethodSweeper::_advise_to_sweep = 0; | |
143 jlong NMethodSweeper::_last_was_full = 0; | |
144 uint NMethodSweeper::_highest_marked = 0; | |
145 long NMethodSweeper::_was_full_traversal = 0; | |
0 | 146 |
989 | 147 class MarkActivationClosure: public CodeBlobClosure { |
148 public: | |
149 virtual void do_code_blob(CodeBlob* cb) { | |
150 // If we see an activation belonging to a non_entrant nmethod, we mark it. | |
151 if (cb->is_nmethod() && ((nmethod*)cb)->is_not_entrant()) { | |
152 ((nmethod*)cb)->mark_as_seen_on_stack(); | |
153 } | |
154 } | |
155 }; | |
156 static MarkActivationClosure mark_activation_closure; | |
157 | |
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158 void NMethodSweeper::scan_stacks() { |
0 | 159 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint"); |
160 if (!MethodFlushing) return; | |
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161 _do_sweep = true; |
0 | 162 |
163 // No need to synchronize access, since this is always executed at a | |
164 // safepoint. If we aren't in the middle of scan and a rescan | |
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165 // hasn't been requested then just return. If UseCodeCacheFlushing is on and |
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166 // code cache flushing is in progress, don't skip sweeping to help make progress |
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167 // clearing space in the code cache. |
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168 if ((_current == NULL && !_rescan) && !(UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs())) { |
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169 _do_sweep = false; |
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170 return; |
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171 } |
0 | 172 |
173 // Make sure CompiledIC_lock in unlocked, since we might update some | |
174 // inline caches. If it is, we just bail-out and try later. | |
175 if (CompiledIC_lock->is_locked() || Patching_lock->is_locked()) return; | |
176 | |
177 // Check for restart | |
178 assert(CodeCache::find_blob_unsafe(_current) == _current, "Sweeper nmethod cached state invalid"); | |
179 if (_current == NULL) { | |
180 _seen = 0; | |
181 _invocations = NmethodSweepFraction; | |
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182 _current = CodeCache::first_nmethod(); |
0 | 183 _traversals += 1; |
184 if (PrintMethodFlushing) { | |
185 tty->print_cr("### Sweep: stack traversal %d", _traversals); | |
186 } | |
989 | 187 Threads::nmethods_do(&mark_activation_closure); |
0 | 188 |
189 // reset the flags since we started a scan from the beginning. | |
190 _rescan = false; | |
191 _locked_seen = 0; | |
192 _not_entrant_seen_on_stack = 0; | |
193 } | |
194 | |
1202 | 195 if (UseCodeCacheFlushing) { |
196 if (!CodeCache::needs_flushing()) { | |
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197 // scan_stacks() runs during a safepoint, no race with setters |
1202 | 198 _advise_to_sweep = 0; |
199 } | |
200 | |
201 if (was_full()) { | |
202 // There was some progress so attempt to restart the compiler | |
203 jlong now = os::javaTimeMillis(); | |
204 jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000; | |
205 jlong curr_interval = now - _last_was_full; | |
206 if ((!CodeCache::needs_flushing()) && (curr_interval > max_interval)) { | |
207 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation); | |
208 set_was_full(false); | |
209 | |
210 // Update the _last_was_full time so we can tell how fast the | |
211 // code cache is filling up | |
212 _last_was_full = os::javaTimeMillis(); | |
213 | |
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214 log_sweep("restart_compiler"); |
1202 | 215 } |
216 } | |
217 } | |
0 | 218 } |
219 | |
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220 void NMethodSweeper::possibly_sweep() { |
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221 assert(JavaThread::current()->thread_state() == _thread_in_vm, "must run in vm mode"); |
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222 if ((!MethodFlushing) || (!_do_sweep)) return; |
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223 |
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224 if (_invocations > 0) { |
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225 // Only one thread at a time will sweep |
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226 jint old = Atomic::cmpxchg( 1, &_sweep_started, 0 ); |
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227 if (old != 0) { |
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228 return; |
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229 } |
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230 #ifdef ASSERT |
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231 if (LogSweeper && _records == NULL) { |
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232 // Create the ring buffer for the logging code |
6197 | 233 _records = NEW_C_HEAP_ARRAY(SweeperRecord, SweeperLogEntries, mtGC); |
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234 memset(_records, 0, sizeof(SweeperRecord) * SweeperLogEntries); |
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235 } |
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236 #endif |
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237 if (_invocations > 0) { |
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238 sweep_code_cache(); |
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239 _invocations--; |
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240 } |
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241 _sweep_started = 0; |
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242 } |
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243 } |
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244 |
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245 void NMethodSweeper::sweep_code_cache() { |
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246 #ifdef ASSERT |
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247 jlong sweep_start; |
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248 if (PrintMethodFlushing) { |
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249 sweep_start = os::javaTimeMillis(); |
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250 } |
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251 #endif |
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252 if (PrintMethodFlushing && Verbose) { |
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253 tty->print_cr("### Sweep at %d out of %d. Invocations left: %d", _seen, CodeCache::nof_nmethods(), _invocations); |
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254 } |
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255 |
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256 // We want to visit all nmethods after NmethodSweepFraction |
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257 // invocations so divide the remaining number of nmethods by the |
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258 // remaining number of invocations. This is only an estimate since |
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259 // the number of nmethods changes during the sweep so the final |
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260 // stage must iterate until it there are no more nmethods. |
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261 int todo = (CodeCache::nof_nmethods() - _seen) / _invocations; |
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262 |
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263 assert(!SafepointSynchronize::is_at_safepoint(), "should not be in safepoint when we get here"); |
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264 assert(!CodeCache_lock->owned_by_self(), "just checking"); |
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265 |
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266 { |
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267 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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268 |
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269 // The last invocation iterates until there are no more nmethods |
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270 for (int i = 0; (i < todo || _invocations == 1) && _current != NULL; i++) { |
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271 if (SafepointSynchronize::is_synchronizing()) { // Safepoint request |
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272 if (PrintMethodFlushing && Verbose) { |
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273 tty->print_cr("### Sweep at %d out of %d, invocation: %d, yielding to safepoint", _seen, CodeCache::nof_nmethods(), _invocations); |
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274 } |
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275 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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276 |
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277 assert(Thread::current()->is_Java_thread(), "should be java thread"); |
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278 JavaThread* thread = (JavaThread*)Thread::current(); |
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279 ThreadBlockInVM tbivm(thread); |
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280 thread->java_suspend_self(); |
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281 } |
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282 // Since we will give up the CodeCache_lock, always skip ahead |
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283 // to the next nmethod. Other blobs can be deleted by other |
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284 // threads but nmethods are only reclaimed by the sweeper. |
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285 nmethod* next = CodeCache::next_nmethod(_current); |
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286 |
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287 // Now ready to process nmethod and give up CodeCache_lock |
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288 { |
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289 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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290 process_nmethod(_current); |
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291 } |
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292 _seen++; |
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293 _current = next; |
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294 } |
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295 } |
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296 |
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297 assert(_invocations > 1 || _current == NULL, "must have scanned the whole cache"); |
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298 |
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299 if (_current == NULL && !_rescan && (_locked_seen || _not_entrant_seen_on_stack)) { |
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300 // we've completed a scan without making progress but there were |
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301 // nmethods we were unable to process either because they were |
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302 // locked or were still on stack. We don't have to aggresively |
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303 // clean them up so just stop scanning. We could scan once more |
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304 // but that complicates the control logic and it's unlikely to |
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305 // matter much. |
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306 if (PrintMethodFlushing) { |
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307 tty->print_cr("### Couldn't make progress on some nmethods so stopping sweep"); |
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308 } |
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309 } |
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310 |
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311 #ifdef ASSERT |
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312 if(PrintMethodFlushing) { |
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313 jlong sweep_end = os::javaTimeMillis(); |
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314 tty->print_cr("### sweeper: sweep time(%d): " INT64_FORMAT, _invocations, sweep_end - sweep_start); |
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315 } |
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316 #endif |
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317 |
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318 if (_invocations == 1) { |
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319 log_sweep("finished"); |
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320 } |
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321 } |
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322 |
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323 class NMethodMarker: public StackObj { |
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324 private: |
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325 CompilerThread* _thread; |
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326 public: |
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327 NMethodMarker(nmethod* nm) { |
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328 _thread = CompilerThread::current(); |
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329 if (!nm->is_zombie() && !nm->is_unloaded()) { |
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330 // Only expose live nmethods for scanning |
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331 _thread->set_scanned_nmethod(nm); |
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332 } |
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333 } |
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334 ~NMethodMarker() { |
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335 _thread->set_scanned_nmethod(NULL); |
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336 } |
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337 }; |
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338 |
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339 void NMethodSweeper::release_nmethod(nmethod *nm) { |
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340 // Clean up any CompiledICHolders |
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341 { |
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342 ResourceMark rm; |
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343 MutexLocker ml_patch(CompiledIC_lock); |
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344 RelocIterator iter(nm); |
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345 while (iter.next()) { |
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346 if (iter.type() == relocInfo::virtual_call_type) { |
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347 CompiledIC::cleanup_call_site(iter.virtual_call_reloc()); |
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348 } |
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349 } |
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350 } |
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351 |
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352 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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353 nm->flush(); |
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354 } |
0 | 355 |
356 void NMethodSweeper::process_nmethod(nmethod *nm) { | |
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357 assert(!CodeCache_lock->owned_by_self(), "just checking"); |
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358 |
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359 // Make sure this nmethod doesn't get unloaded during the scan, |
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360 // since the locks acquired below might safepoint. |
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361 NMethodMarker nmm(nm); |
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362 |
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363 SWEEP(nm); |
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364 |
0 | 365 // Skip methods that are currently referenced by the VM |
366 if (nm->is_locked_by_vm()) { | |
367 // But still remember to clean-up inline caches for alive nmethods | |
368 if (nm->is_alive()) { | |
369 // Clean-up all inline caches that points to zombie/non-reentrant methods | |
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370 MutexLocker cl(CompiledIC_lock); |
0 | 371 nm->cleanup_inline_caches(); |
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372 SWEEP(nm); |
0 | 373 } else { |
374 _locked_seen++; | |
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375 SWEEP(nm); |
0 | 376 } |
377 return; | |
378 } | |
379 | |
380 if (nm->is_zombie()) { | |
381 // If it is first time, we see nmethod then we mark it. Otherwise, | |
382 // we reclame it. When we have seen a zombie method twice, we know that | |
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383 // there are no inline caches that refer to it. |
0 | 384 if (nm->is_marked_for_reclamation()) { |
385 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods"); | |
941 | 386 if (PrintMethodFlushing && Verbose) { |
1202 | 387 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (marked for reclamation) being flushed", nm->compile_id(), nm); |
941 | 388 } |
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389 release_nmethod(nm); |
0 | 390 } else { |
941 | 391 if (PrintMethodFlushing && Verbose) { |
1202 | 392 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (zombie) being marked for reclamation", nm->compile_id(), nm); |
941 | 393 } |
0 | 394 nm->mark_for_reclamation(); |
395 _rescan = true; | |
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396 SWEEP(nm); |
0 | 397 } |
398 } else if (nm->is_not_entrant()) { | |
399 // If there is no current activations of this method on the | |
400 // stack we can safely convert it to a zombie method | |
401 if (nm->can_not_entrant_be_converted()) { | |
941 | 402 if (PrintMethodFlushing && Verbose) { |
1202 | 403 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (not entrant) being made zombie", nm->compile_id(), nm); |
941 | 404 } |
0 | 405 nm->make_zombie(); |
406 _rescan = true; | |
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407 SWEEP(nm); |
0 | 408 } else { |
409 // Still alive, clean up its inline caches | |
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410 MutexLocker cl(CompiledIC_lock); |
0 | 411 nm->cleanup_inline_caches(); |
412 // we coudn't transition this nmethod so don't immediately | |
413 // request a rescan. If this method stays on the stack for a | |
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414 // long time we don't want to keep rescanning the code cache. |
0 | 415 _not_entrant_seen_on_stack++; |
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416 SWEEP(nm); |
0 | 417 } |
418 } else if (nm->is_unloaded()) { | |
419 // Unloaded code, just make it a zombie | |
941 | 420 if (PrintMethodFlushing && Verbose) |
1202 | 421 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (unloaded) being made zombie", nm->compile_id(), nm); |
941 | 422 if (nm->is_osr_method()) { |
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423 SWEEP(nm); |
0 | 424 // No inline caches will ever point to osr methods, so we can just remove it |
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425 release_nmethod(nm); |
0 | 426 } else { |
427 nm->make_zombie(); | |
428 _rescan = true; | |
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429 SWEEP(nm); |
0 | 430 } |
431 } else { | |
432 assert(nm->is_alive(), "should be alive"); | |
1202 | 433 |
434 if (UseCodeCacheFlushing) { | |
435 if ((nm->method()->code() != nm) && !(nm->is_locked_by_vm()) && !(nm->is_osr_method()) && | |
436 (_traversals > _was_full_traversal+2) && (((uint)nm->compile_id()) < _highest_marked) && | |
437 CodeCache::needs_flushing()) { | |
438 // This method has not been called since the forced cleanup happened | |
439 nm->make_not_entrant(); | |
440 } | |
441 } | |
442 | |
0 | 443 // Clean-up all inline caches that points to zombie/non-reentrant methods |
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444 MutexLocker cl(CompiledIC_lock); |
0 | 445 nm->cleanup_inline_caches(); |
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446 SWEEP(nm); |
0 | 447 } |
448 } | |
1202 | 449 |
450 // Code cache unloading: when compilers notice the code cache is getting full, | |
451 // they will call a vm op that comes here. This code attempts to speculatively | |
452 // unload the oldest half of the nmethods (based on the compile job id) by | |
453 // saving the old code in a list in the CodeCache. Then | |
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454 // execution resumes. If a method so marked is not called by the second sweeper |
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455 // stack traversal after the current one, the nmethod will be marked non-entrant and |
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456 // got rid of by normal sweeping. If the method is called, the Method*'s |
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457 // _code field is restored and the Method*/nmethod |
1202 | 458 // go back to their normal state. |
459 void NMethodSweeper::handle_full_code_cache(bool is_full) { | |
460 // Only the first one to notice can advise us to start early cleaning | |
461 if (!is_full){ | |
462 jint old = Atomic::cmpxchg( 1, &_advise_to_sweep, 0 ); | |
463 if (old != 0) { | |
464 return; | |
465 } | |
466 } | |
467 | |
468 if (is_full) { | |
469 // Since code cache is full, immediately stop new compiles | |
470 bool did_set = CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation); | |
471 if (!did_set) { | |
472 // only the first to notice can start the cleaning, | |
473 // others will go back and block | |
474 return; | |
475 } | |
476 set_was_full(true); | |
477 | |
478 // If we run out within MinCodeCacheFlushingInterval of the last unload time, give up | |
479 jlong now = os::javaTimeMillis(); | |
480 jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000; | |
481 jlong curr_interval = now - _last_was_full; | |
482 if (curr_interval < max_interval) { | |
483 _rescan = true; | |
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484 log_sweep("disable_compiler", "flushing_interval='" UINT64_FORMAT "'", |
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485 curr_interval/1000); |
1202 | 486 return; |
487 } | |
488 } | |
489 | |
490 VM_HandleFullCodeCache op(is_full); | |
491 VMThread::execute(&op); | |
492 | |
493 // rescan again as soon as possible | |
494 _rescan = true; | |
495 } | |
496 | |
497 void NMethodSweeper::speculative_disconnect_nmethods(bool is_full) { | |
498 // If there was a race in detecting full code cache, only run | |
499 // one vm op for it or keep the compiler shut off | |
500 | |
501 debug_only(jlong start = os::javaTimeMillis();) | |
502 | |
503 if ((!was_full()) && (is_full)) { | |
504 if (!CodeCache::needs_flushing()) { | |
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505 log_sweep("restart_compiler"); |
1202 | 506 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation); |
507 return; | |
508 } | |
509 } | |
510 | |
511 // Traverse the code cache trying to dump the oldest nmethods | |
512 uint curr_max_comp_id = CompileBroker::get_compilation_id(); | |
513 uint flush_target = ((curr_max_comp_id - _highest_marked) >> 1) + _highest_marked; | |
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514 log_sweep("start_cleaning"); |
1202 | 515 |
516 nmethod* nm = CodeCache::alive_nmethod(CodeCache::first()); | |
517 jint disconnected = 0; | |
518 jint made_not_entrant = 0; | |
519 while ((nm != NULL)){ | |
520 uint curr_comp_id = nm->compile_id(); | |
521 | |
522 // OSR methods cannot be flushed like this. Also, don't flush native methods | |
523 // since they are part of the JDK in most cases | |
524 if (nm->is_in_use() && (!nm->is_osr_method()) && (!nm->is_locked_by_vm()) && | |
525 (!nm->is_native_method()) && ((curr_comp_id < flush_target))) { | |
526 | |
527 if ((nm->method()->code() == nm)) { | |
528 // This method has not been previously considered for | |
529 // unloading or it was restored already | |
530 CodeCache::speculatively_disconnect(nm); | |
531 disconnected++; | |
532 } else if (nm->is_speculatively_disconnected()) { | |
533 // This method was previously considered for preemptive unloading and was not called since then | |
1783 | 534 CompilationPolicy::policy()->delay_compilation(nm->method()); |
1202 | 535 nm->make_not_entrant(); |
536 made_not_entrant++; | |
537 } | |
538 | |
539 if (curr_comp_id > _highest_marked) { | |
540 _highest_marked = curr_comp_id; | |
541 } | |
542 } | |
543 nm = CodeCache::alive_nmethod(CodeCache::next(nm)); | |
544 } | |
545 | |
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546 log_sweep("stop_cleaning", |
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547 "disconnected='" UINT32_FORMAT "' made_not_entrant='" UINT32_FORMAT "'", |
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548 disconnected, made_not_entrant); |
1202 | 549 |
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550 // Shut off compiler. Sweeper will start over with a new stack scan and |
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551 // traversal cycle and turn it back on if it clears enough space. |
1202 | 552 if (was_full()) { |
553 _last_was_full = os::javaTimeMillis(); | |
554 CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation); | |
555 } | |
556 | |
557 // After two more traversals the sweeper will get rid of unrestored nmethods | |
558 _was_full_traversal = _traversals; | |
559 #ifdef ASSERT | |
560 jlong end = os::javaTimeMillis(); | |
561 if(PrintMethodFlushing && Verbose) { | |
562 tty->print_cr("### sweeper: unload time: " INT64_FORMAT, end-start); | |
563 } | |
564 #endif | |
565 } | |
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566 |
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567 |
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568 // Print out some state information about the current sweep and the |
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569 // state of the code cache if it's requested. |
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570 void NMethodSweeper::log_sweep(const char* msg, const char* format, ...) { |
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571 if (PrintMethodFlushing) { |
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572 stringStream s; |
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573 // Dump code cache state into a buffer before locking the tty, |
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574 // because log_state() will use locks causing lock conflicts. |
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575 CodeCache::log_state(&s); |
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576 |
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577 ttyLocker ttyl; |
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578 tty->print("### sweeper: %s ", msg); |
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579 if (format != NULL) { |
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580 va_list ap; |
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581 va_start(ap, format); |
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582 tty->vprint(format, ap); |
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583 va_end(ap); |
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584 } |
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585 tty->print_cr(s.as_string()); |
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586 } |
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587 |
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588 if (LogCompilation && (xtty != NULL)) { |
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589 stringStream s; |
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590 // Dump code cache state into a buffer before locking the tty, |
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591 // because log_state() will use locks causing lock conflicts. |
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592 CodeCache::log_state(&s); |
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593 |
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594 ttyLocker ttyl; |
1646 | 595 xtty->begin_elem("sweeper state='%s' traversals='" INTX_FORMAT "' ", msg, (intx)traversal_count()); |
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596 if (format != NULL) { |
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597 va_list ap; |
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598 va_start(ap, format); |
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599 xtty->vprint(format, ap); |
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600 va_end(ap); |
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601 } |
2482
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602 xtty->print(s.as_string()); |
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603 xtty->stamp(); |
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604 xtty->end_elem(); |
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605 } |
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606 } |