Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/sweeper.cpp @ 4837:eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
Summary: Re-enable survivors during the initial-mark pause. Afterwards, the concurrent marking threads have to scan them and mark everything reachable from them. The next GC will have to wait for the survivors to be scanned.
Reviewed-by: brutisso, johnc
author | tonyp |
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date | Wed, 25 Jan 2012 12:58:23 -0500 |
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 |
3384
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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 } |