Mercurial > hg > truffle
annotate src/share/vm/runtime/sweeper.cpp @ 10370:47bdfb3d010f
8015486: PSScavenge::is_obj_in_young is unnecessarily slow with UseCompressedOops
Summary: Compare compressed oops to a compressed young gen boundary instead of uncompressing the oops before doing the young gen boundary check.
Reviewed-by: brutisso, jmasa
author | stefank |
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date | Thu, 30 May 2013 10:58:16 +0200 |
parents | 0cfa93c2fcc4 |
children | f2110083203d |
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 |
3384
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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; | |
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139 bool NMethodSweeper::_resweep = false; |
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140 jint NMethodSweeper::_flush_token = 0; |
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141 jlong NMethodSweeper::_last_full_flush_time = 0; |
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142 int NMethodSweeper::_highest_marked = 0; |
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143 int NMethodSweeper::_dead_compile_ids = 0; |
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144 long NMethodSweeper::_last_flush_traversal_id = 0; |
0 | 145 |
989 | 146 class MarkActivationClosure: public CodeBlobClosure { |
147 public: | |
148 virtual void do_code_blob(CodeBlob* cb) { | |
149 // If we see an activation belonging to a non_entrant nmethod, we mark it. | |
150 if (cb->is_nmethod() && ((nmethod*)cb)->is_not_entrant()) { | |
151 ((nmethod*)cb)->mark_as_seen_on_stack(); | |
152 } | |
153 } | |
154 }; | |
155 static MarkActivationClosure mark_activation_closure; | |
156 | |
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157 bool NMethodSweeper::sweep_in_progress() { |
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158 return (_current != NULL); |
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159 } |
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160 |
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161 void NMethodSweeper::scan_stacks() { |
0 | 162 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint"); |
163 if (!MethodFlushing) return; | |
164 | |
165 // No need to synchronize access, since this is always executed at a | |
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166 // safepoint. |
0 | 167 |
168 // Make sure CompiledIC_lock in unlocked, since we might update some | |
169 // inline caches. If it is, we just bail-out and try later. | |
170 if (CompiledIC_lock->is_locked() || Patching_lock->is_locked()) return; | |
171 | |
172 // Check for restart | |
173 assert(CodeCache::find_blob_unsafe(_current) == _current, "Sweeper nmethod cached state invalid"); | |
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174 if (!sweep_in_progress() && _resweep) { |
0 | 175 _seen = 0; |
176 _invocations = NmethodSweepFraction; | |
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177 _current = CodeCache::first_nmethod(); |
0 | 178 _traversals += 1; |
179 if (PrintMethodFlushing) { | |
180 tty->print_cr("### Sweep: stack traversal %d", _traversals); | |
181 } | |
989 | 182 Threads::nmethods_do(&mark_activation_closure); |
0 | 183 |
184 // reset the flags since we started a scan from the beginning. | |
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185 _resweep = false; |
0 | 186 _locked_seen = 0; |
187 _not_entrant_seen_on_stack = 0; | |
188 } | |
189 | |
1202 | 190 if (UseCodeCacheFlushing) { |
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191 // only allow new flushes after the interval is complete. |
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192 jlong now = os::javaTimeMillis(); |
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193 jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000; |
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194 jlong curr_interval = now - _last_full_flush_time; |
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195 if (curr_interval > max_interval) { |
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196 _flush_token = 0; |
1202 | 197 } |
198 | |
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199 if (!CodeCache::needs_flushing() && !CompileBroker::should_compile_new_jobs()) { |
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200 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation); |
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201 log_sweep("restart_compiler"); |
1202 | 202 } |
203 } | |
0 | 204 } |
205 | |
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206 void NMethodSweeper::possibly_sweep() { |
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207 assert(JavaThread::current()->thread_state() == _thread_in_vm, "must run in vm mode"); |
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208 if (!MethodFlushing || !sweep_in_progress()) return; |
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209 |
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210 if (_invocations > 0) { |
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211 // Only one thread at a time will sweep |
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212 jint old = Atomic::cmpxchg( 1, &_sweep_started, 0 ); |
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213 if (old != 0) { |
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214 return; |
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215 } |
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216 #ifdef ASSERT |
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217 if (LogSweeper && _records == NULL) { |
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218 // Create the ring buffer for the logging code |
6197 | 219 _records = NEW_C_HEAP_ARRAY(SweeperRecord, SweeperLogEntries, mtGC); |
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220 memset(_records, 0, sizeof(SweeperRecord) * SweeperLogEntries); |
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221 } |
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222 #endif |
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223 if (_invocations > 0) { |
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224 sweep_code_cache(); |
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225 _invocations--; |
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226 } |
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227 _sweep_started = 0; |
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228 } |
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229 } |
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230 |
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231 void NMethodSweeper::sweep_code_cache() { |
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232 #ifdef ASSERT |
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233 jlong sweep_start; |
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234 if (PrintMethodFlushing) { |
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235 sweep_start = os::javaTimeMillis(); |
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236 } |
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237 #endif |
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238 if (PrintMethodFlushing && Verbose) { |
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239 tty->print_cr("### Sweep at %d out of %d. Invocations left: %d", _seen, CodeCache::nof_nmethods(), _invocations); |
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240 } |
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241 |
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242 if (!CompileBroker::should_compile_new_jobs()) { |
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243 // If we have turned off compilations we might as well do full sweeps |
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244 // in order to reach the clean state faster. Otherwise the sleeping compiler |
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245 // threads will slow down sweeping. After a few iterations the cache |
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246 // will be clean and sweeping stops (_resweep will not be set) |
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247 _invocations = 1; |
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248 } |
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249 |
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250 // We want to visit all nmethods after NmethodSweepFraction |
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251 // invocations so divide the remaining number of nmethods by the |
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252 // remaining number of invocations. This is only an estimate since |
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253 // the number of nmethods changes during the sweep so the final |
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254 // stage must iterate until it there are no more nmethods. |
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255 int todo = (CodeCache::nof_nmethods() - _seen) / _invocations; |
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256 |
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257 assert(!SafepointSynchronize::is_at_safepoint(), "should not be in safepoint when we get here"); |
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258 assert(!CodeCache_lock->owned_by_self(), "just checking"); |
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259 |
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260 { |
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261 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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262 |
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263 // The last invocation iterates until there are no more nmethods |
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264 for (int i = 0; (i < todo || _invocations == 1) && _current != NULL; i++) { |
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265 if (SafepointSynchronize::is_synchronizing()) { // Safepoint request |
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266 if (PrintMethodFlushing && Verbose) { |
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267 tty->print_cr("### Sweep at %d out of %d, invocation: %d, yielding to safepoint", _seen, CodeCache::nof_nmethods(), _invocations); |
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268 } |
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269 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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270 |
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271 assert(Thread::current()->is_Java_thread(), "should be java thread"); |
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272 JavaThread* thread = (JavaThread*)Thread::current(); |
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273 ThreadBlockInVM tbivm(thread); |
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274 thread->java_suspend_self(); |
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275 } |
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276 // Since we will give up the CodeCache_lock, always skip ahead |
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277 // to the next nmethod. Other blobs can be deleted by other |
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278 // threads but nmethods are only reclaimed by the sweeper. |
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279 nmethod* next = CodeCache::next_nmethod(_current); |
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280 |
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281 // Now ready to process nmethod and give up CodeCache_lock |
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282 { |
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283 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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284 process_nmethod(_current); |
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285 } |
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286 _seen++; |
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287 _current = next; |
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288 } |
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289 } |
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290 |
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291 assert(_invocations > 1 || _current == NULL, "must have scanned the whole cache"); |
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292 |
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293 if (!sweep_in_progress() && !_resweep && (_locked_seen || _not_entrant_seen_on_stack)) { |
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294 // we've completed a scan without making progress but there were |
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295 // nmethods we were unable to process either because they were |
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296 // locked or were still on stack. We don't have to aggresively |
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297 // clean them up so just stop scanning. We could scan once more |
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298 // but that complicates the control logic and it's unlikely to |
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299 // matter much. |
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300 if (PrintMethodFlushing) { |
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301 tty->print_cr("### Couldn't make progress on some nmethods so stopping sweep"); |
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302 } |
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303 } |
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304 |
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305 #ifdef ASSERT |
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306 if(PrintMethodFlushing) { |
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307 jlong sweep_end = os::javaTimeMillis(); |
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308 tty->print_cr("### sweeper: sweep time(%d): " INT64_FORMAT, _invocations, sweep_end - sweep_start); |
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309 } |
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310 #endif |
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311 |
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312 if (_invocations == 1) { |
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313 log_sweep("finished"); |
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314 } |
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315 |
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316 // Sweeper is the only case where memory is released, |
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317 // check here if it is time to restart the compiler. |
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318 if (UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs() && !CodeCache::needs_flushing()) { |
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319 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation); |
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320 log_sweep("restart_compiler"); |
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321 } |
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322 } |
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323 |
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324 class NMethodMarker: public StackObj { |
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325 private: |
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326 CompilerThread* _thread; |
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327 public: |
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328 NMethodMarker(nmethod* nm) { |
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329 _thread = CompilerThread::current(); |
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330 if (!nm->is_zombie() && !nm->is_unloaded()) { |
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331 // Only expose live nmethods for scanning |
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332 _thread->set_scanned_nmethod(nm); |
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333 } |
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334 } |
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335 ~NMethodMarker() { |
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336 _thread->set_scanned_nmethod(NULL); |
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337 } |
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338 }; |
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339 |
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340 void NMethodSweeper::release_nmethod(nmethod *nm) { |
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341 // Clean up any CompiledICHolders |
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342 { |
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343 ResourceMark rm; |
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344 MutexLocker ml_patch(CompiledIC_lock); |
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345 RelocIterator iter(nm); |
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346 while (iter.next()) { |
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347 if (iter.type() == relocInfo::virtual_call_type) { |
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348 CompiledIC::cleanup_call_site(iter.virtual_call_reloc()); |
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349 } |
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350 } |
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351 } |
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352 |
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353 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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354 nm->flush(); |
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355 } |
0 | 356 |
357 void NMethodSweeper::process_nmethod(nmethod *nm) { | |
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358 assert(!CodeCache_lock->owned_by_self(), "just checking"); |
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359 |
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360 // Make sure this nmethod doesn't get unloaded during the scan, |
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361 // since the locks acquired below might safepoint. |
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362 NMethodMarker nmm(nm); |
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363 |
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364 SWEEP(nm); |
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365 |
0 | 366 // Skip methods that are currently referenced by the VM |
367 if (nm->is_locked_by_vm()) { | |
368 // But still remember to clean-up inline caches for alive nmethods | |
369 if (nm->is_alive()) { | |
370 // Clean-up all inline caches that points to zombie/non-reentrant methods | |
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371 MutexLocker cl(CompiledIC_lock); |
0 | 372 nm->cleanup_inline_caches(); |
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373 SWEEP(nm); |
0 | 374 } else { |
375 _locked_seen++; | |
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376 SWEEP(nm); |
0 | 377 } |
378 return; | |
379 } | |
380 | |
381 if (nm->is_zombie()) { | |
382 // If it is first time, we see nmethod then we mark it. Otherwise, | |
383 // we reclame it. When we have seen a zombie method twice, we know that | |
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384 // there are no inline caches that refer to it. |
0 | 385 if (nm->is_marked_for_reclamation()) { |
386 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods"); | |
941 | 387 if (PrintMethodFlushing && Verbose) { |
1202 | 388 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (marked for reclamation) being flushed", nm->compile_id(), nm); |
941 | 389 } |
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390 release_nmethod(nm); |
0 | 391 } else { |
941 | 392 if (PrintMethodFlushing && Verbose) { |
1202 | 393 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (zombie) being marked for reclamation", nm->compile_id(), nm); |
941 | 394 } |
0 | 395 nm->mark_for_reclamation(); |
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396 _resweep = true; |
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397 SWEEP(nm); |
0 | 398 } |
399 } else if (nm->is_not_entrant()) { | |
400 // If there is no current activations of this method on the | |
401 // stack we can safely convert it to a zombie method | |
402 if (nm->can_not_entrant_be_converted()) { | |
941 | 403 if (PrintMethodFlushing && Verbose) { |
1202 | 404 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (not entrant) being made zombie", nm->compile_id(), nm); |
941 | 405 } |
0 | 406 nm->make_zombie(); |
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407 _resweep = true; |
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408 SWEEP(nm); |
0 | 409 } else { |
410 // Still alive, clean up its inline caches | |
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411 MutexLocker cl(CompiledIC_lock); |
0 | 412 nm->cleanup_inline_caches(); |
413 // we coudn't transition this nmethod so don't immediately | |
414 // request a rescan. If this method stays on the stack for a | |
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415 // long time we don't want to keep rescanning the code cache. |
0 | 416 _not_entrant_seen_on_stack++; |
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417 SWEEP(nm); |
0 | 418 } |
419 } else if (nm->is_unloaded()) { | |
420 // Unloaded code, just make it a zombie | |
941 | 421 if (PrintMethodFlushing && Verbose) |
1202 | 422 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (unloaded) being made zombie", nm->compile_id(), nm); |
941 | 423 if (nm->is_osr_method()) { |
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424 SWEEP(nm); |
0 | 425 // No inline caches will ever point to osr methods, so we can just remove it |
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426 release_nmethod(nm); |
0 | 427 } else { |
428 nm->make_zombie(); | |
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429 _resweep = true; |
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430 SWEEP(nm); |
0 | 431 } |
432 } else { | |
433 assert(nm->is_alive(), "should be alive"); | |
1202 | 434 |
435 if (UseCodeCacheFlushing) { | |
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436 if (nm->is_speculatively_disconnected() && !nm->is_locked_by_vm() && !nm->is_osr_method() && |
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437 (_traversals > _last_flush_traversal_id + 2) && (nm->compile_id() < _highest_marked)) { |
1202 | 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 | |
461 if (is_full) { | |
462 // Since code cache is full, immediately stop new compiles | |
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463 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { |
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464 log_sweep("disable_compiler"); |
1202 | 465 } |
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466 } |
1202 | 467 |
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468 // Make sure only one thread can flush |
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469 // The token is reset after CodeCacheMinimumFlushInterval in scan stacks, |
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470 // no need to check the timeout here. |
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471 jint old = Atomic::cmpxchg( 1, &_flush_token, 0 ); |
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472 if (old != 0) { |
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473 return; |
1202 | 474 } |
475 | |
476 VM_HandleFullCodeCache op(is_full); | |
477 VMThread::execute(&op); | |
478 | |
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479 // resweep again as soon as possible |
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480 _resweep = true; |
1202 | 481 } |
482 | |
483 void NMethodSweeper::speculative_disconnect_nmethods(bool is_full) { | |
484 // If there was a race in detecting full code cache, only run | |
485 // one vm op for it or keep the compiler shut off | |
486 | |
487 debug_only(jlong start = os::javaTimeMillis();) | |
488 | |
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489 // Traverse the code cache trying to dump the oldest nmethods |
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490 int curr_max_comp_id = CompileBroker::get_compilation_id(); |
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491 int flush_target = ((curr_max_comp_id - _dead_compile_ids) / CodeCacheFlushingFraction) + _dead_compile_ids; |
1202 | 492 |
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493 log_sweep("start_cleaning"); |
1202 | 494 |
495 nmethod* nm = CodeCache::alive_nmethod(CodeCache::first()); | |
496 jint disconnected = 0; | |
497 jint made_not_entrant = 0; | |
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498 jint nmethod_count = 0; |
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499 |
1202 | 500 while ((nm != NULL)){ |
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501 int curr_comp_id = nm->compile_id(); |
1202 | 502 |
503 // OSR methods cannot be flushed like this. Also, don't flush native methods | |
504 // since they are part of the JDK in most cases | |
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505 if (!nm->is_osr_method() && !nm->is_locked_by_vm() && !nm->is_native_method()) { |
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506 |
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507 // only count methods that can be speculatively disconnected |
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508 nmethod_count++; |
1202 | 509 |
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510 if (nm->is_in_use() && (curr_comp_id < flush_target)) { |
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511 if ((nm->method()->code() == nm)) { |
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512 // This method has not been previously considered for |
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513 // unloading or it was restored already |
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514 CodeCache::speculatively_disconnect(nm); |
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515 disconnected++; |
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516 } else if (nm->is_speculatively_disconnected()) { |
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517 // This method was previously considered for preemptive unloading and was not called since then |
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518 CompilationPolicy::policy()->delay_compilation(nm->method()); |
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519 nm->make_not_entrant(); |
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520 made_not_entrant++; |
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521 } |
1202 | 522 |
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523 if (curr_comp_id > _highest_marked) { |
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524 _highest_marked = curr_comp_id; |
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525 } |
1202 | 526 } |
527 } | |
528 nm = CodeCache::alive_nmethod(CodeCache::next(nm)); | |
529 } | |
530 | |
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531 // remember how many compile_ids wheren't seen last flush. |
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532 _dead_compile_ids = curr_max_comp_id - nmethod_count; |
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533 |
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534 log_sweep("stop_cleaning", |
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535 "disconnected='" UINT32_FORMAT "' made_not_entrant='" UINT32_FORMAT "'", |
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536 disconnected, made_not_entrant); |
1202 | 537 |
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538 // Shut off compiler. Sweeper will start over with a new stack scan and |
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539 // traversal cycle and turn it back on if it clears enough space. |
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540 if (is_full) { |
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541 _last_full_flush_time = os::javaTimeMillis(); |
1202 | 542 } |
543 | |
544 // After two more traversals the sweeper will get rid of unrestored nmethods | |
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545 _last_flush_traversal_id = _traversals; |
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546 _resweep = true; |
1202 | 547 #ifdef ASSERT |
548 jlong end = os::javaTimeMillis(); | |
549 if(PrintMethodFlushing && Verbose) { | |
550 tty->print_cr("### sweeper: unload time: " INT64_FORMAT, end-start); | |
551 } | |
552 #endif | |
553 } | |
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554 |
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555 |
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556 // Print out some state information about the current sweep and the |
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557 // state of the code cache if it's requested. |
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558 void NMethodSweeper::log_sweep(const char* msg, const char* format, ...) { |
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559 if (PrintMethodFlushing) { |
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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; |
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566 tty->print("### sweeper: %s ", msg); |
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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 tty->vprint(format, ap); |
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571 va_end(ap); |
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572 } |
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573 tty->print_cr(s.as_string()); |
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574 } |
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575 |
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576 if (LogCompilation && (xtty != NULL)) { |
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577 stringStream s; |
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578 // Dump code cache state into a buffer before locking the tty, |
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579 // because log_state() will use locks causing lock conflicts. |
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580 CodeCache::log_state(&s); |
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581 |
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582 ttyLocker ttyl; |
1646 | 583 xtty->begin_elem("sweeper state='%s' traversals='" INTX_FORMAT "' ", msg, (intx)traversal_count()); |
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584 if (format != NULL) { |
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585 va_list ap; |
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586 va_start(ap, format); |
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587 xtty->vprint(format, ap); |
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588 va_end(ap); |
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589 } |
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590 xtty->print(s.as_string()); |
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591 xtty->stamp(); |
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592 xtty->end_elem(); |
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593 } |
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594 } |