Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/compilationPolicy.cpp @ 22763:94b7354ef0e0
improved error message and fixed macro usage (GRAAL-1387)
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 08 Jan 2016 22:24:51 +0100 |
parents | 9d78d44d3aac |
children | 9c0966b935a9 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2014, 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/compiledIC.hpp" | |
27 #include "code/nmethod.hpp" | |
28 #include "code/scopeDesc.hpp" | |
29 #include "compiler/compilerOracle.hpp" | |
30 #include "interpreter/interpreter.hpp" | |
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31 #include "oops/methodData.hpp" |
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32 #include "oops/method.hpp" |
1972 | 33 #include "oops/oop.inline.hpp" |
34 #include "prims/nativeLookup.hpp" | |
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35 #include "runtime/advancedThresholdPolicy.hpp" |
1972 | 36 #include "runtime/compilationPolicy.hpp" |
37 #include "runtime/frame.hpp" | |
38 #include "runtime/handles.inline.hpp" | |
39 #include "runtime/rframe.hpp" | |
40 #include "runtime/simpleThresholdPolicy.hpp" | |
41 #include "runtime/stubRoutines.hpp" | |
42 #include "runtime/thread.hpp" | |
43 #include "runtime/timer.hpp" | |
44 #include "runtime/vframe.hpp" | |
45 #include "runtime/vm_operations.hpp" | |
46 #include "utilities/events.hpp" | |
47 #include "utilities/globalDefinitions.hpp" | |
0 | 48 |
49 CompilationPolicy* CompilationPolicy::_policy; | |
50 elapsedTimer CompilationPolicy::_accumulated_time; | |
51 bool CompilationPolicy::_in_vm_startup; | |
52 | |
53 // Determine compilation policy based on command line argument | |
54 void compilationPolicy_init() { | |
55 CompilationPolicy::set_in_vm_startup(DelayCompilationDuringStartup); | |
56 | |
57 switch(CompilationPolicyChoice) { | |
58 case 0: | |
59 CompilationPolicy::set_policy(new SimpleCompPolicy()); | |
60 break; | |
61 | |
62 case 1: | |
63 #ifdef COMPILER2 | |
64 CompilationPolicy::set_policy(new StackWalkCompPolicy()); | |
65 #else | |
66 Unimplemented(); | |
67 #endif | |
68 break; | |
1783 | 69 case 2: |
70 #ifdef TIERED | |
71 CompilationPolicy::set_policy(new SimpleThresholdPolicy()); | |
72 #else | |
73 Unimplemented(); | |
74 #endif | |
75 break; | |
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76 case 3: |
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77 #ifdef TIERED |
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78 CompilationPolicy::set_policy(new AdvancedThresholdPolicy()); |
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79 #else |
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80 Unimplemented(); |
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81 #endif |
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82 break; |
0 | 83 default: |
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84 fatal("CompilationPolicyChoice must be in the range: [0-3]"); |
0 | 85 } |
1783 | 86 CompilationPolicy::policy()->initialize(); |
0 | 87 } |
88 | |
89 void CompilationPolicy::completed_vm_startup() { | |
90 if (TraceCompilationPolicy) { | |
91 tty->print("CompilationPolicy: completed vm startup.\n"); | |
92 } | |
93 _in_vm_startup = false; | |
94 } | |
95 | |
96 // Returns true if m must be compiled before executing it | |
97 // This is intended to force compiles for methods (usually for | |
98 // debugging) that would otherwise be interpreted for some reason. | |
1783 | 99 bool CompilationPolicy::must_be_compiled(methodHandle m, int comp_level) { |
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100 // Don't allow Xcomp to cause compiles in replay mode |
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101 if (ReplayCompiles) return false; |
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102 |
0 | 103 if (m->has_compiled_code()) return false; // already compiled |
1783 | 104 if (!can_be_compiled(m, comp_level)) return false; |
0 | 105 |
106 return !UseInterpreter || // must compile all methods | |
1202 | 107 (UseCompiler && AlwaysCompileLoopMethods && m->has_loops() && CompileBroker::should_compile_new_jobs()); // eagerly compile loop methods |
0 | 108 } |
109 | |
110 // Returns true if m is allowed to be compiled | |
1783 | 111 bool CompilationPolicy::can_be_compiled(methodHandle m, int comp_level) { |
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112 // allow any levels for WhiteBox |
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113 assert(WhiteBoxAPI || comp_level == CompLevel_all || is_compile(comp_level), "illegal compilation level"); |
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114 |
0 | 115 if (m->is_abstract()) return false; |
116 if (DontCompileHugeMethods && m->code_size() > HugeMethodLimit) return false; | |
117 | |
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118 // Math intrinsics should never be compiled as this can lead to |
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119 // monotonicity problems because the interpreter will prefer the |
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120 // compiled code to the intrinsic version. This can't happen in |
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121 // production because the invocation counter can't be incremented |
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122 // but we shouldn't expose the system to this problem in testing |
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123 // modes. |
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124 if (!AbstractInterpreter::can_be_compiled(m)) { |
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125 return false; |
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126 } |
1783 | 127 if (comp_level == CompLevel_all) { |
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128 if (TieredCompilation) { |
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129 // enough to be compilable at any level for tiered |
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130 return !m->is_not_compilable(CompLevel_simple) || !m->is_not_compilable(CompLevel_full_optimization); |
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131 } else { |
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132 // must be compilable at available level for non-tiered |
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133 return !m->is_not_compilable(CompLevel_highest_tier); |
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134 } |
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135 } else if (is_compile(comp_level)) { |
1783 | 136 return !m->is_not_compilable(comp_level); |
137 } | |
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138 return false; |
1783 | 139 } |
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140 |
12073 | 141 // Returns true if m is allowed to be osr compiled |
142 bool CompilationPolicy::can_be_osr_compiled(methodHandle m, int comp_level) { | |
143 bool result = false; | |
144 if (comp_level == CompLevel_all) { | |
145 if (TieredCompilation) { | |
146 // enough to be osr compilable at any level for tiered | |
147 result = !m->is_not_osr_compilable(CompLevel_simple) || !m->is_not_osr_compilable(CompLevel_full_optimization); | |
148 } else { | |
149 // must be osr compilable at available level for non-tiered | |
150 result = !m->is_not_osr_compilable(CompLevel_highest_tier); | |
151 } | |
152 } else if (is_compile(comp_level)) { | |
153 result = !m->is_not_osr_compilable(comp_level); | |
154 } | |
155 return (result && can_be_compiled(m, comp_level)); | |
156 } | |
157 | |
1783 | 158 bool CompilationPolicy::is_compilation_enabled() { |
159 // NOTE: CompileBroker::should_compile_new_jobs() checks for UseCompiler | |
160 return !delay_compilation_during_startup() && CompileBroker::should_compile_new_jobs(); | |
0 | 161 } |
162 | |
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163 #ifdef COMPILERJVMCI |
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164 CompileTask* CompilationPolicy::select_task_blocking_aware(CompileQueue* compile_queue) { |
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165 if (!BackgroundCompilation) { |
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166 for (CompileTask* task = compile_queue->first(); task != NULL; task = task->next()) { |
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167 if (task->is_blocking()) { |
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168 return task; |
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169 } |
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170 } |
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171 } |
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172 return compile_queue->first(); |
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173 } |
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174 #endif |
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175 |
0 | 176 #ifndef PRODUCT |
177 void CompilationPolicy::print_time() { | |
178 tty->print_cr ("Accumulated compilationPolicy times:"); | |
179 tty->print_cr ("---------------------------"); | |
180 tty->print_cr (" Total: %3.3f sec.", _accumulated_time.seconds()); | |
181 } | |
182 | |
1783 | 183 void NonTieredCompPolicy::trace_osr_completion(nmethod* osr_nm) { |
0 | 184 if (TraceOnStackReplacement) { |
185 if (osr_nm == NULL) tty->print_cr("compilation failed"); | |
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186 else tty->print_cr("nmethod " INTPTR_FORMAT, p2i(osr_nm)); |
0 | 187 } |
188 } | |
189 #endif // !PRODUCT | |
190 | |
1783 | 191 void NonTieredCompPolicy::initialize() { |
192 // Setup the compiler thread numbers | |
193 if (CICompilerCountPerCPU) { | |
194 // Example: if CICompilerCountPerCPU is true, then we get | |
195 // max(log2(8)-1,1) = 2 compiler threads on an 8-way machine. | |
196 // May help big-app startup time. | |
197 _compiler_count = MAX2(log2_intptr(os::active_processor_count())-1,1); | |
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198 FLAG_SET_ERGO(intx, CICompilerCount, _compiler_count); |
1783 | 199 } else { |
200 _compiler_count = CICompilerCount; | |
201 } | |
202 } | |
203 | |
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204 // Note: this policy is used ONLY if TieredCompilation is off. |
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205 // compiler_count() behaves the following way: |
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206 // - with TIERED build (with both COMPILER1 and COMPILER2 defined) it should return |
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207 // zero for the c1 compilation levels, hence the particular ordering of the |
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208 // statements. |
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209 // - the same should happen when COMPILER2 is defined and COMPILER1 is not |
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210 // (server build without TIERED defined). |
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211 // - if only COMPILER1 is defined (client build), zero should be returned for |
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212 // the c2 level. |
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213 // - if neither is defined - always return zero. |
1783 | 214 int NonTieredCompPolicy::compiler_count(CompLevel comp_level) { |
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215 assert(!TieredCompilation, "This policy should not be used with TieredCompilation"); |
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216 #if defined(COMPILER2) || defined(COMPILERJVMCI) |
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217 if (is_c2_compile(comp_level)) { |
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218 return _compiler_count; |
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219 } else { |
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220 return 0; |
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221 } |
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222 #endif |
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223 |
1783 | 224 #ifdef COMPILER1 |
225 if (is_c1_compile(comp_level)) { | |
226 return _compiler_count; | |
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227 } else { |
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228 return 0; |
1783 | 229 } |
230 #endif | |
231 | |
232 return 0; | |
233 } | |
234 | |
235 void NonTieredCompPolicy::reset_counter_for_invocation_event(methodHandle m) { | |
0 | 236 // Make sure invocation and backedge counter doesn't overflow again right away |
237 // as would be the case for native methods. | |
238 | |
239 // BUT also make sure the method doesn't look like it was never executed. | |
240 // Set carry bit and reduce counter's value to min(count, CompileThreshold/2). | |
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241 MethodCounters* mcs = m->method_counters(); |
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242 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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243 mcs->invocation_counter()->set_carry(); |
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244 mcs->backedge_counter()->set_carry(); |
0 | 245 |
246 assert(!m->was_never_executed(), "don't reset to 0 -- could be mistaken for never-executed"); | |
247 } | |
248 | |
1783 | 249 void NonTieredCompPolicy::reset_counter_for_back_branch_event(methodHandle m) { |
0 | 250 // Delay next back-branch event but pump up invocation counter to triger |
251 // whole method compilation. | |
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252 MethodCounters* mcs = m->method_counters(); |
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253 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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254 InvocationCounter* i = mcs->invocation_counter(); |
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255 InvocationCounter* b = mcs->backedge_counter(); |
0 | 256 |
257 // Don't set invocation_counter's value too low otherwise the method will | |
258 // look like immature (ic < ~5300) which prevents the inlining based on | |
259 // the type profiling. | |
260 i->set(i->state(), CompileThreshold); | |
261 // Don't reset counter too low - it is used to check if OSR method is ready. | |
262 b->set(b->state(), CompileThreshold / 2); | |
263 } | |
264 | |
1783 | 265 // |
266 // CounterDecay | |
267 // | |
268 // Interates through invocation counters and decrements them. This | |
269 // is done at each safepoint. | |
270 // | |
271 class CounterDecay : public AllStatic { | |
272 static jlong _last_timestamp; | |
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273 static void do_method(Method* m) { |
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274 MethodCounters* mcs = m->method_counters(); |
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275 if (mcs != NULL) { |
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276 mcs->invocation_counter()->decay(); |
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277 } |
1783 | 278 } |
279 public: | |
280 static void decay(); | |
281 static bool is_decay_needed() { | |
282 return (os::javaTimeMillis() - _last_timestamp) > CounterDecayMinIntervalLength; | |
283 } | |
284 }; | |
285 | |
286 jlong CounterDecay::_last_timestamp = 0; | |
287 | |
288 void CounterDecay::decay() { | |
289 _last_timestamp = os::javaTimeMillis(); | |
290 | |
291 // This operation is going to be performed only at the end of a safepoint | |
292 // and hence GC's will not be going on, all Java mutators are suspended | |
293 // at this point and hence SystemDictionary_lock is also not needed. | |
294 assert(SafepointSynchronize::is_at_safepoint(), "can only be executed at a safepoint"); | |
295 int nclasses = SystemDictionary::number_of_classes(); | |
296 double classes_per_tick = nclasses * (CounterDecayMinIntervalLength * 1e-3 / | |
297 CounterHalfLifeTime); | |
298 for (int i = 0; i < classes_per_tick; i++) { | |
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299 Klass* k = SystemDictionary::try_get_next_class(); |
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300 if (k != NULL && k->oop_is_instance()) { |
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301 InstanceKlass::cast(k)->methods_do(do_method); |
1783 | 302 } |
303 } | |
304 } | |
305 | |
306 // Called at the end of the safepoint | |
307 void NonTieredCompPolicy::do_safepoint_work() { | |
308 if(UseCounterDecay && CounterDecay::is_decay_needed()) { | |
309 CounterDecay::decay(); | |
310 } | |
311 } | |
312 | |
313 void NonTieredCompPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { | |
314 ScopeDesc* sd = trap_scope; | |
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315 MethodCounters* mcs; |
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316 InvocationCounter* c; |
1783 | 317 for (; !sd->is_top(); sd = sd->sender()) { |
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318 mcs = sd->method()->method_counters(); |
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319 if (mcs != NULL) { |
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320 // Reset ICs of inlined methods, since they can trigger compilations also. |
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321 mcs->invocation_counter()->reset(); |
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322 } |
1783 | 323 } |
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324 mcs = sd->method()->method_counters(); |
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325 if (mcs != NULL) { |
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326 c = mcs->invocation_counter(); |
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327 if (is_osr) { |
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328 // It was an OSR method, so bump the count higher. |
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329 c->set(c->state(), CompileThreshold); |
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330 } else { |
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331 c->reset(); |
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332 } |
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333 mcs->backedge_counter()->reset(); |
1783 | 334 } |
335 } | |
336 | |
337 // This method can be called by any component of the runtime to notify the policy | |
338 // that it's recommended to delay the complation of this method. | |
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339 void NonTieredCompPolicy::delay_compilation(Method* method) { |
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340 MethodCounters* mcs = method->method_counters(); |
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341 if (mcs != NULL) { |
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342 mcs->invocation_counter()->decay(); |
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343 mcs->backedge_counter()->decay(); |
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344 } |
1783 | 345 } |
346 | |
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347 void NonTieredCompPolicy::disable_compilation(Method* method) { |
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348 MethodCounters* mcs = method->method_counters(); |
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349 if (mcs != NULL) { |
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350 mcs->invocation_counter()->set_state(InvocationCounter::wait_for_nothing); |
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351 mcs->backedge_counter()->set_state(InvocationCounter::wait_for_nothing); |
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352 } |
1783 | 353 } |
354 | |
355 CompileTask* NonTieredCompPolicy::select_task(CompileQueue* compile_queue) { | |
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356 #ifdef COMPILERJVMCI |
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357 return select_task_blocking_aware(compile_queue); |
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358 #else |
1783 | 359 return compile_queue->first(); |
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360 #endif |
1783 | 361 } |
362 | |
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363 bool NonTieredCompPolicy::is_mature(Method* method) { |
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364 MethodData* mdo = method->method_data(); |
1783 | 365 assert(mdo != NULL, "Should be"); |
366 uint current = mdo->mileage_of(method); | |
367 uint initial = mdo->creation_mileage(); | |
368 if (current < initial) | |
369 return true; // some sort of overflow | |
370 uint target; | |
371 if (ProfileMaturityPercentage <= 0) | |
372 target = (uint) -ProfileMaturityPercentage; // absolute value | |
373 else | |
374 target = (uint)( (ProfileMaturityPercentage * CompileThreshold) / 100 ); | |
375 return (current >= initial + target); | |
376 } | |
377 | |
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378 nmethod* NonTieredCompPolicy::event(methodHandle method, methodHandle inlinee, int branch_bci, |
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379 int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) { |
1783 | 380 assert(comp_level == CompLevel_none, "This should be only called from the interpreter"); |
381 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci)); | |
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382 if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) { |
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383 // If certain JVMTI events (e.g. frame pop event) are requested then the |
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384 // thread is forced to remain in interpreted code. This is |
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385 // implemented partly by a check in the run_compiled_code |
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386 // section of the interpreter whether we should skip running |
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387 // compiled code, and partly by skipping OSR compiles for |
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388 // interpreted-only threads. |
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389 if (bci != InvocationEntryBci) { |
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390 reset_counter_for_back_branch_event(method); |
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391 return NULL; |
1783 | 392 } |
393 } | |
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394 if (CompileTheWorld || ReplayCompiles) { |
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395 // Don't trigger other compiles in testing mode |
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396 if (bci == InvocationEntryBci) { |
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397 reset_counter_for_invocation_event(method); |
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398 } else { |
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399 reset_counter_for_back_branch_event(method); |
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400 } |
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401 return NULL; |
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402 } |
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403 |
1783 | 404 if (bci == InvocationEntryBci) { |
405 // when code cache is full, compilation gets switched off, UseCompiler | |
406 // is set to false | |
407 if (!method->has_compiled_code() && UseCompiler) { | |
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408 method_invocation_event(method, thread); |
1783 | 409 } else { |
410 // Force counter overflow on method entry, even if no compilation | |
411 // happened. (The method_invocation_event call does this also.) | |
412 reset_counter_for_invocation_event(method); | |
413 } | |
414 // compilation at an invocation overflow no longer goes and retries test for | |
415 // compiled method. We always run the loser of the race as interpreted. | |
416 // so return NULL | |
417 return NULL; | |
418 } else { | |
419 // counter overflow in a loop => try to do on-stack-replacement | |
420 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci, CompLevel_highest_tier, true); | |
421 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci)); | |
422 // when code cache is full, we should not compile any more... | |
423 if (osr_nm == NULL && UseCompiler) { | |
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424 method_back_branch_event(method, bci, thread); |
1783 | 425 osr_nm = method->lookup_osr_nmethod_for(bci, CompLevel_highest_tier, true); |
426 } | |
427 if (osr_nm == NULL) { | |
428 reset_counter_for_back_branch_event(method); | |
429 return NULL; | |
430 } | |
431 return osr_nm; | |
432 } | |
433 return NULL; | |
434 } | |
435 | |
436 #ifndef PRODUCT | |
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437 PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL |
1783 | 438 void NonTieredCompPolicy::trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci) { |
439 if (TraceInvocationCounterOverflow) { | |
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440 MethodCounters* mcs = m->method_counters(); |
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441 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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442 InvocationCounter* ic = mcs->invocation_counter(); |
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443 InvocationCounter* bc = mcs->backedge_counter(); |
1783 | 444 ResourceMark rm; |
445 const char* msg = | |
446 bci == InvocationEntryBci | |
447 ? "comp-policy cntr ovfl @ %d in entry of " | |
448 : "comp-policy cntr ovfl @ %d in loop of "; | |
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449 PRAGMA_DIAG_PUSH |
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450 PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL |
1783 | 451 tty->print(msg, bci); |
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452 PRAGMA_DIAG_POP |
1783 | 453 m->print_value(); |
454 tty->cr(); | |
455 ic->print(); | |
456 bc->print(); | |
457 if (ProfileInterpreter) { | |
458 if (bci != InvocationEntryBci) { | |
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459 MethodData* mdo = m->method_data(); |
1783 | 460 if (mdo != NULL) { |
461 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); | |
462 tty->print_cr("back branch count = %d", count); | |
463 } | |
464 } | |
465 } | |
466 } | |
467 } | |
468 | |
469 void NonTieredCompPolicy::trace_osr_request(methodHandle method, nmethod* osr, int bci) { | |
470 if (TraceOnStackReplacement) { | |
471 ResourceMark rm; | |
472 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); | |
473 method->print_short_name(tty); | |
474 tty->print_cr(" at bci %d", bci); | |
475 } | |
476 } | |
477 #endif // !PRODUCT | |
478 | |
0 | 479 // SimpleCompPolicy - compile current method |
480 | |
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481 void SimpleCompPolicy::method_invocation_event(methodHandle m, JavaThread* thread) { |
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482 const int comp_level = CompLevel_highest_tier; |
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483 const int hot_count = m->invocation_count(); |
0 | 484 reset_counter_for_invocation_event(m); |
485 const char* comment = "count"; | |
486 | |
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487 if (is_compilation_enabled() && can_be_compiled(m, comp_level)) { |
0 | 488 nmethod* nm = m->code(); |
489 if (nm == NULL ) { | |
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490 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, m, hot_count, comment, thread); |
0 | 491 } |
492 } | |
493 } | |
494 | |
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495 void SimpleCompPolicy::method_back_branch_event(methodHandle m, int bci, JavaThread* thread) { |
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496 const int comp_level = CompLevel_highest_tier; |
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497 const int hot_count = m->backedge_count(); |
0 | 498 const char* comment = "backedge_count"; |
499 | |
12073 | 500 if (is_compilation_enabled() && can_be_osr_compiled(m, comp_level)) { |
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501 CompileBroker::compile_method(m, bci, comp_level, m, hot_count, comment, thread); |
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502 NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(bci, comp_level, true));) |
0 | 503 } |
504 } | |
505 // StackWalkCompPolicy - walk up stack to find a suitable method to compile | |
506 | |
507 #ifdef COMPILER2 | |
508 const char* StackWalkCompPolicy::_msg = NULL; | |
509 | |
510 | |
511 // Consider m for compilation | |
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512 void StackWalkCompPolicy::method_invocation_event(methodHandle m, JavaThread* thread) { |
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513 const int comp_level = CompLevel_highest_tier; |
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514 const int hot_count = m->invocation_count(); |
0 | 515 reset_counter_for_invocation_event(m); |
516 const char* comment = "count"; | |
517 | |
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518 if (is_compilation_enabled() && m->code() == NULL && can_be_compiled(m, comp_level)) { |
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519 ResourceMark rm(thread); |
0 | 520 frame fr = thread->last_frame(); |
521 assert(fr.is_interpreted_frame(), "must be interpreted"); | |
522 assert(fr.interpreter_frame_method() == m(), "bad method"); | |
523 | |
524 if (TraceCompilationPolicy) { | |
525 tty->print("method invocation trigger: "); | |
526 m->print_short_name(tty); | |
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527 tty->print(" ( interpreted " INTPTR_FORMAT ", size=%d ) ", p2i((address)m()), m->code_size()); |
0 | 528 } |
529 RegisterMap reg_map(thread, false); | |
530 javaVFrame* triggerVF = thread->last_java_vframe(®_map); | |
531 // triggerVF is the frame that triggered its counter | |
532 RFrame* first = new InterpretedRFrame(triggerVF->fr(), thread, m); | |
533 | |
534 if (first->top_method()->code() != NULL) { | |
535 // called obsolete method/nmethod -- no need to recompile | |
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536 if (TraceCompilationPolicy) tty->print_cr(" --> " INTPTR_FORMAT, p2i(first->top_method()->code())); |
0 | 537 } else { |
538 if (TimeCompilationPolicy) accumulated_time()->start(); | |
539 GrowableArray<RFrame*>* stack = new GrowableArray<RFrame*>(50); | |
540 stack->push(first); | |
541 RFrame* top = findTopInlinableFrame(stack); | |
542 if (TimeCompilationPolicy) accumulated_time()->stop(); | |
543 assert(top != NULL, "findTopInlinableFrame returned null"); | |
544 if (TraceCompilationPolicy) top->print(); | |
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545 CompileBroker::compile_method(top->top_method(), InvocationEntryBci, comp_level, |
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546 m, hot_count, comment, thread); |
0 | 547 } |
548 } | |
549 } | |
550 | |
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551 void StackWalkCompPolicy::method_back_branch_event(methodHandle m, int bci, JavaThread* thread) { |
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552 const int comp_level = CompLevel_highest_tier; |
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553 const int hot_count = m->backedge_count(); |
0 | 554 const char* comment = "backedge_count"; |
555 | |
12073 | 556 if (is_compilation_enabled() && can_be_osr_compiled(m, comp_level)) { |
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557 CompileBroker::compile_method(m, bci, comp_level, m, hot_count, comment, thread); |
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558 NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(bci, comp_level, true));) |
0 | 559 } |
560 } | |
561 | |
562 RFrame* StackWalkCompPolicy::findTopInlinableFrame(GrowableArray<RFrame*>* stack) { | |
563 // go up the stack until finding a frame that (probably) won't be inlined | |
564 // into its caller | |
565 RFrame* current = stack->at(0); // current choice for stopping | |
566 assert( current && !current->is_compiled(), "" ); | |
567 const char* msg = NULL; | |
568 | |
569 while (1) { | |
570 | |
571 // before going up the stack further, check if doing so would get us into | |
572 // compiled code | |
573 RFrame* next = senderOf(current, stack); | |
574 if( !next ) // No next frame up the stack? | |
575 break; // Then compile with current frame | |
576 | |
577 methodHandle m = current->top_method(); | |
578 methodHandle next_m = next->top_method(); | |
579 | |
580 if (TraceCompilationPolicy && Verbose) { | |
581 tty->print("[caller: "); | |
582 next_m->print_short_name(tty); | |
583 tty->print("] "); | |
584 } | |
585 | |
586 if( !Inline ) { // Inlining turned off | |
587 msg = "Inlining turned off"; | |
588 break; | |
589 } | |
590 if (next_m->is_not_compilable()) { // Did fail to compile this before/ | |
591 msg = "caller not compilable"; | |
592 break; | |
593 } | |
594 if (next->num() > MaxRecompilationSearchLength) { | |
595 // don't go up too high when searching for recompilees | |
596 msg = "don't go up any further: > MaxRecompilationSearchLength"; | |
597 break; | |
598 } | |
599 if (next->distance() > MaxInterpretedSearchLength) { | |
600 // don't go up too high when searching for recompilees | |
601 msg = "don't go up any further: next > MaxInterpretedSearchLength"; | |
602 break; | |
603 } | |
604 // Compiled frame above already decided not to inline; | |
605 // do not recompile him. | |
606 if (next->is_compiled()) { | |
607 msg = "not going up into optimized code"; | |
608 break; | |
609 } | |
610 | |
611 // Interpreted frame above us was already compiled. Do not force | |
612 // a recompile, although if the frame above us runs long enough an | |
613 // OSR might still happen. | |
614 if( current->is_interpreted() && next_m->has_compiled_code() ) { | |
615 msg = "not going up -- already compiled caller"; | |
616 break; | |
617 } | |
618 | |
619 // Compute how frequent this call site is. We have current method 'm'. | |
620 // We know next method 'next_m' is interpreted. Find the call site and | |
621 // check the various invocation counts. | |
622 int invcnt = 0; // Caller counts | |
623 if (ProfileInterpreter) { | |
624 invcnt = next_m->interpreter_invocation_count(); | |
625 } | |
626 int cnt = 0; // Call site counts | |
627 if (ProfileInterpreter && next_m->method_data() != NULL) { | |
628 ResourceMark rm; | |
629 int bci = next->top_vframe()->bci(); | |
630 ProfileData* data = next_m->method_data()->bci_to_data(bci); | |
631 if (data != NULL && data->is_CounterData()) | |
632 cnt = data->as_CounterData()->count(); | |
633 } | |
634 | |
635 // Caller counts / call-site counts; i.e. is this call site | |
636 // a hot call site for method next_m? | |
637 int freq = (invcnt) ? cnt/invcnt : cnt; | |
638 | |
639 // Check size and frequency limits | |
640 if ((msg = shouldInline(m, freq, cnt)) != NULL) { | |
641 break; | |
642 } | |
643 // Check inlining negative tests | |
644 if ((msg = shouldNotInline(m)) != NULL) { | |
645 break; | |
646 } | |
647 | |
648 | |
649 // If the caller method is too big or something then we do not want to | |
650 // compile it just to inline a method | |
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651 if (!can_be_compiled(next_m, CompLevel_any)) { |
0 | 652 msg = "caller cannot be compiled"; |
653 break; | |
654 } | |
655 | |
656 if( next_m->name() == vmSymbols::class_initializer_name() ) { | |
657 msg = "do not compile class initializer (OSR ok)"; | |
658 break; | |
659 } | |
660 | |
661 if (TraceCompilationPolicy && Verbose) { | |
662 tty->print("\n\t check caller: "); | |
663 next_m->print_short_name(tty); | |
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664 tty->print(" ( interpreted " INTPTR_FORMAT ", size=%d ) ", p2i((address)next_m()), next_m->code_size()); |
0 | 665 } |
666 | |
667 current = next; | |
668 } | |
669 | |
670 assert( !current || !current->is_compiled(), "" ); | |
671 | |
672 if (TraceCompilationPolicy && msg) tty->print("(%s)\n", msg); | |
673 | |
674 return current; | |
675 } | |
676 | |
677 RFrame* StackWalkCompPolicy::senderOf(RFrame* rf, GrowableArray<RFrame*>* stack) { | |
678 RFrame* sender = rf->caller(); | |
679 if (sender && sender->num() == stack->length()) stack->push(sender); | |
680 return sender; | |
681 } | |
682 | |
683 | |
684 const char* StackWalkCompPolicy::shouldInline(methodHandle m, float freq, int cnt) { | |
685 // Allows targeted inlining | |
686 // positive filter: should send be inlined? returns NULL (--> yes) | |
687 // or rejection msg | |
688 int max_size = MaxInlineSize; | |
689 int cost = m->code_size(); | |
690 | |
691 // Check for too many throws (and not too huge) | |
692 if (m->interpreter_throwout_count() > InlineThrowCount && cost < InlineThrowMaxSize ) { | |
693 return NULL; | |
694 } | |
695 | |
696 // bump the max size if the call is frequent | |
697 if ((freq >= InlineFrequencyRatio) || (cnt >= InlineFrequencyCount)) { | |
698 if (TraceFrequencyInlining) { | |
699 tty->print("(Inlined frequent method)\n"); | |
700 m->print(); | |
701 } | |
702 max_size = FreqInlineSize; | |
703 } | |
704 if (cost > max_size) { | |
705 return (_msg = "too big"); | |
706 } | |
707 return NULL; | |
708 } | |
709 | |
710 | |
711 const char* StackWalkCompPolicy::shouldNotInline(methodHandle m) { | |
712 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg | |
713 if (m->is_abstract()) return (_msg = "abstract method"); | |
714 // note: we allow ik->is_abstract() | |
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715 if (!m->method_holder()->is_initialized()) return (_msg = "method holder not initialized"); |
0 | 716 if (m->is_native()) return (_msg = "native method"); |
717 nmethod* m_code = m->code(); | |
1748 | 718 if (m_code != NULL && m_code->code_size() > InlineSmallCode) |
0 | 719 return (_msg = "already compiled into a big method"); |
720 | |
721 // use frequency-based objections only for non-trivial methods | |
722 if (m->code_size() <= MaxTrivialSize) return NULL; | |
723 if (UseInterpreter) { // don't use counts with -Xcomp | |
724 if ((m->code() == NULL) && m->was_never_executed()) return (_msg = "never executed"); | |
725 if (!m->was_executed_more_than(MIN2(MinInliningThreshold, CompileThreshold >> 1))) return (_msg = "executed < MinInliningThreshold times"); | |
726 } | |
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727 if (Method::has_unloaded_classes_in_signature(m, JavaThread::current())) return (_msg = "unloaded signature classes"); |
0 | 728 |
729 return NULL; | |
730 } | |
731 | |
732 | |
733 | |
734 #endif // COMPILER2 |