Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/compilationPolicy.cpp @ 13683:de839ec35cc7
schedule lambda method compilation and execution on GPU (PTX) when possible; fix a couple of bugs.
author | S.Bharadwaj Yadavalli <bharadwaj.yadavalli@oracle.com> |
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date | Fri, 17 Jan 2014 16:03:13 -0500 |
parents | 359f7e70ae7f |
children | 9161ed8ce796 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2013, 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" | |
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48 #ifdef GRAAL |
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49 #include "runtime/gpu.hpp" |
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50 #endif |
0 | 51 |
52 CompilationPolicy* CompilationPolicy::_policy; | |
53 elapsedTimer CompilationPolicy::_accumulated_time; | |
54 bool CompilationPolicy::_in_vm_startup; | |
55 | |
56 // Determine compilation policy based on command line argument | |
57 void compilationPolicy_init() { | |
58 CompilationPolicy::set_in_vm_startup(DelayCompilationDuringStartup); | |
59 | |
60 switch(CompilationPolicyChoice) { | |
61 case 0: | |
62 CompilationPolicy::set_policy(new SimpleCompPolicy()); | |
63 break; | |
64 | |
65 case 1: | |
66 #ifdef COMPILER2 | |
67 CompilationPolicy::set_policy(new StackWalkCompPolicy()); | |
68 #else | |
69 Unimplemented(); | |
70 #endif | |
71 break; | |
1783 | 72 case 2: |
73 #ifdef TIERED | |
74 CompilationPolicy::set_policy(new SimpleThresholdPolicy()); | |
75 #else | |
76 Unimplemented(); | |
77 #endif | |
78 break; | |
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79 case 3: |
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80 #ifdef TIERED |
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81 CompilationPolicy::set_policy(new AdvancedThresholdPolicy()); |
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82 #else |
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83 Unimplemented(); |
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84 #endif |
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85 break; |
0 | 86 default: |
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87 fatal("CompilationPolicyChoice must be in the range: [0-3]"); |
0 | 88 } |
1783 | 89 CompilationPolicy::policy()->initialize(); |
0 | 90 } |
91 | |
92 void CompilationPolicy::completed_vm_startup() { | |
93 if (TraceCompilationPolicy) { | |
94 tty->print("CompilationPolicy: completed vm startup.\n"); | |
95 } | |
96 _in_vm_startup = false; | |
97 } | |
98 | |
99 // Returns true if m must be compiled before executing it | |
100 // This is intended to force compiles for methods (usually for | |
101 // debugging) that would otherwise be interpreted for some reason. | |
1783 | 102 bool CompilationPolicy::must_be_compiled(methodHandle m, int comp_level) { |
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103 // Don't allow Xcomp to cause compiles in replay mode |
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104 if (ReplayCompiles) return false; |
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105 |
0 | 106 if (m->has_compiled_code()) return false; // already compiled |
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107 |
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108 #ifdef GRAAL |
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109 // Check if this is a Lambda method that can be compiled to a GPU. |
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110 if (m->is_lambda()) { |
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111 // If GPU is available and the necessary linkage is available |
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112 // rerurn true indicatin that this method must be compiled. |
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113 if (gpu::is_available() && gpu::has_gpu_linkage()) { |
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114 if (TraceGPUInteraction) { |
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115 tty->print("Compiling Lambda method"); |
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116 m->print_short_name(); |
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117 switch (gpu::get_target_il_type()) { |
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118 case gpu::PTX : |
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119 tty->print_cr(" to PTX"); |
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120 break; |
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121 case gpu::HSAIL : |
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122 tty->print_cr(" to HSAIL"); |
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123 break; |
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124 default : |
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125 tty->print_cr(" to Unknown GPU!!!"); |
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126 } |
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127 } |
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128 return true; |
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129 } |
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130 } |
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131 #endif |
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132 |
1783 | 133 if (!can_be_compiled(m, comp_level)) return false; |
0 | 134 |
135 return !UseInterpreter || // must compile all methods | |
1202 | 136 (UseCompiler && AlwaysCompileLoopMethods && m->has_loops() && CompileBroker::should_compile_new_jobs()); // eagerly compile loop methods |
0 | 137 } |
138 | |
139 // Returns true if m is allowed to be compiled | |
1783 | 140 bool CompilationPolicy::can_be_compiled(methodHandle m, int comp_level) { |
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141 // allow any levels for WhiteBox |
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142 assert(WhiteBoxAPI || comp_level == CompLevel_all || is_compile(comp_level), "illegal compilation level"); |
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143 |
0 | 144 if (m->is_abstract()) return false; |
145 if (DontCompileHugeMethods && m->code_size() > HugeMethodLimit) return false; | |
146 | |
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147 // Math intrinsics should never be compiled as this can lead to |
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148 // monotonicity problems because the interpreter will prefer the |
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149 // compiled code to the intrinsic version. This can't happen in |
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150 // production because the invocation counter can't be incremented |
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151 // but we shouldn't expose the system to this problem in testing |
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152 // modes. |
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153 if (!AbstractInterpreter::can_be_compiled(m)) { |
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154 return false; |
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155 } |
1783 | 156 if (comp_level == CompLevel_all) { |
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157 if (TieredCompilation) { |
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158 // enough to be compilable at any level for tiered |
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159 return !m->is_not_compilable(CompLevel_simple) || !m->is_not_compilable(CompLevel_full_optimization); |
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160 } else { |
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161 // must be compilable at available level for non-tiered |
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162 return !m->is_not_compilable(CompLevel_highest_tier); |
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163 } |
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164 } else if (is_compile(comp_level)) { |
1783 | 165 return !m->is_not_compilable(comp_level); |
166 } | |
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167 return false; |
1783 | 168 } |
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169 |
12073 | 170 // Returns true if m is allowed to be osr compiled |
171 bool CompilationPolicy::can_be_osr_compiled(methodHandle m, int comp_level) { | |
172 bool result = false; | |
173 if (comp_level == CompLevel_all) { | |
174 if (TieredCompilation) { | |
175 // enough to be osr compilable at any level for tiered | |
176 result = !m->is_not_osr_compilable(CompLevel_simple) || !m->is_not_osr_compilable(CompLevel_full_optimization); | |
177 } else { | |
178 // must be osr compilable at available level for non-tiered | |
179 result = !m->is_not_osr_compilable(CompLevel_highest_tier); | |
180 } | |
181 } else if (is_compile(comp_level)) { | |
182 result = !m->is_not_osr_compilable(comp_level); | |
183 } | |
184 return (result && can_be_compiled(m, comp_level)); | |
185 } | |
186 | |
1783 | 187 bool CompilationPolicy::is_compilation_enabled() { |
188 // NOTE: CompileBroker::should_compile_new_jobs() checks for UseCompiler | |
189 return !delay_compilation_during_startup() && CompileBroker::should_compile_new_jobs(); | |
0 | 190 } |
191 | |
192 #ifndef PRODUCT | |
193 void CompilationPolicy::print_time() { | |
194 tty->print_cr ("Accumulated compilationPolicy times:"); | |
195 tty->print_cr ("---------------------------"); | |
196 tty->print_cr (" Total: %3.3f sec.", _accumulated_time.seconds()); | |
197 } | |
198 | |
1783 | 199 void NonTieredCompPolicy::trace_osr_completion(nmethod* osr_nm) { |
0 | 200 if (TraceOnStackReplacement) { |
201 if (osr_nm == NULL) tty->print_cr("compilation failed"); | |
202 else tty->print_cr("nmethod " INTPTR_FORMAT, osr_nm); | |
203 } | |
204 } | |
205 #endif // !PRODUCT | |
206 | |
1783 | 207 void NonTieredCompPolicy::initialize() { |
208 // Setup the compiler thread numbers | |
209 if (CICompilerCountPerCPU) { | |
210 // Example: if CICompilerCountPerCPU is true, then we get | |
211 // max(log2(8)-1,1) = 2 compiler threads on an 8-way machine. | |
212 // May help big-app startup time. | |
213 _compiler_count = MAX2(log2_intptr(os::active_processor_count())-1,1); | |
214 } else { | |
215 _compiler_count = CICompilerCount; | |
216 } | |
217 } | |
218 | |
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219 // Note: this policy is used ONLY if TieredCompilation is off. |
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220 // compiler_count() behaves the following way: |
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221 // - with TIERED build (with both COMPILER1 and COMPILER2 defined) it should return |
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222 // zero for the c1 compilation levels, hence the particular ordering of the |
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223 // statements. |
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224 // - the same should happen when COMPILER2 is defined and COMPILER1 is not |
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225 // (server build without TIERED defined). |
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226 // - if only COMPILER1 is defined (client build), zero should be returned for |
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227 // the c2 level. |
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228 // - if neither is defined - always return zero. |
1783 | 229 int NonTieredCompPolicy::compiler_count(CompLevel comp_level) { |
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230 assert(!TieredCompilation, "This policy should not be used with TieredCompilation"); |
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231 #ifdef COMPILER2 |
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232 if (is_c2_compile(comp_level)) { |
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233 return _compiler_count; |
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234 } else { |
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235 return 0; |
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236 } |
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237 #endif |
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238 |
1783 | 239 #ifdef COMPILER1 |
240 if (is_c1_compile(comp_level)) { | |
241 return _compiler_count; | |
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242 } else { |
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243 return 0; |
1783 | 244 } |
245 #endif | |
246 | |
247 return 0; | |
248 } | |
249 | |
250 void NonTieredCompPolicy::reset_counter_for_invocation_event(methodHandle m) { | |
0 | 251 // Make sure invocation and backedge counter doesn't overflow again right away |
252 // as would be the case for native methods. | |
253 | |
254 // BUT also make sure the method doesn't look like it was never executed. | |
255 // Set carry bit and reduce counter's value to min(count, CompileThreshold/2). | |
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256 MethodCounters* mcs = m->method_counters(); |
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257 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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258 mcs->invocation_counter()->set_carry(); |
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259 mcs->backedge_counter()->set_carry(); |
0 | 260 |
261 assert(!m->was_never_executed(), "don't reset to 0 -- could be mistaken for never-executed"); | |
262 } | |
263 | |
1783 | 264 void NonTieredCompPolicy::reset_counter_for_back_branch_event(methodHandle m) { |
0 | 265 // Delay next back-branch event but pump up invocation counter to triger |
266 // whole method compilation. | |
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267 MethodCounters* mcs = m->method_counters(); |
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268 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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269 InvocationCounter* i = mcs->invocation_counter(); |
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270 InvocationCounter* b = mcs->backedge_counter(); |
0 | 271 |
272 // Don't set invocation_counter's value too low otherwise the method will | |
273 // look like immature (ic < ~5300) which prevents the inlining based on | |
274 // the type profiling. | |
275 i->set(i->state(), CompileThreshold); | |
276 // Don't reset counter too low - it is used to check if OSR method is ready. | |
277 b->set(b->state(), CompileThreshold / 2); | |
278 } | |
279 | |
1783 | 280 // |
281 // CounterDecay | |
282 // | |
283 // Interates through invocation counters and decrements them. This | |
284 // is done at each safepoint. | |
285 // | |
286 class CounterDecay : public AllStatic { | |
287 static jlong _last_timestamp; | |
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288 static void do_method(Method* m) { |
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289 MethodCounters* mcs = m->method_counters(); |
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290 if (mcs != NULL) { |
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291 mcs->invocation_counter()->decay(); |
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292 } |
1783 | 293 } |
294 public: | |
295 static void decay(); | |
296 static bool is_decay_needed() { | |
297 return (os::javaTimeMillis() - _last_timestamp) > CounterDecayMinIntervalLength; | |
298 } | |
299 }; | |
300 | |
301 jlong CounterDecay::_last_timestamp = 0; | |
302 | |
303 void CounterDecay::decay() { | |
304 _last_timestamp = os::javaTimeMillis(); | |
305 | |
306 // This operation is going to be performed only at the end of a safepoint | |
307 // and hence GC's will not be going on, all Java mutators are suspended | |
308 // at this point and hence SystemDictionary_lock is also not needed. | |
309 assert(SafepointSynchronize::is_at_safepoint(), "can only be executed at a safepoint"); | |
310 int nclasses = SystemDictionary::number_of_classes(); | |
311 double classes_per_tick = nclasses * (CounterDecayMinIntervalLength * 1e-3 / | |
312 CounterHalfLifeTime); | |
313 for (int i = 0; i < classes_per_tick; i++) { | |
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314 Klass* k = SystemDictionary::try_get_next_class(); |
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315 if (k != NULL && k->oop_is_instance()) { |
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316 InstanceKlass::cast(k)->methods_do(do_method); |
1783 | 317 } |
318 } | |
319 } | |
320 | |
321 // Called at the end of the safepoint | |
322 void NonTieredCompPolicy::do_safepoint_work() { | |
323 if(UseCounterDecay && CounterDecay::is_decay_needed()) { | |
324 CounterDecay::decay(); | |
325 } | |
326 } | |
327 | |
328 void NonTieredCompPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { | |
329 ScopeDesc* sd = trap_scope; | |
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330 MethodCounters* mcs; |
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331 InvocationCounter* c; |
1783 | 332 for (; !sd->is_top(); sd = sd->sender()) { |
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333 mcs = sd->method()->method_counters(); |
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334 if (mcs != NULL) { |
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335 // Reset ICs of inlined methods, since they can trigger compilations also. |
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336 mcs->invocation_counter()->reset(); |
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337 } |
1783 | 338 } |
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339 mcs = sd->method()->method_counters(); |
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340 if (mcs != NULL) { |
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341 c = mcs->invocation_counter(); |
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342 if (is_osr) { |
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343 // It was an OSR method, so bump the count higher. |
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344 c->set(c->state(), CompileThreshold); |
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345 } else { |
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346 c->reset(); |
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347 } |
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348 mcs->backedge_counter()->reset(); |
1783 | 349 } |
350 } | |
351 | |
352 // This method can be called by any component of the runtime to notify the policy | |
353 // that it's recommended to delay the complation of this method. | |
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354 void NonTieredCompPolicy::delay_compilation(Method* method) { |
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355 MethodCounters* mcs = method->method_counters(); |
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356 if (mcs != NULL) { |
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357 mcs->invocation_counter()->decay(); |
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358 mcs->backedge_counter()->decay(); |
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359 } |
1783 | 360 } |
361 | |
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362 void NonTieredCompPolicy::disable_compilation(Method* method) { |
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363 MethodCounters* mcs = method->method_counters(); |
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364 if (mcs != NULL) { |
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365 mcs->invocation_counter()->set_state(InvocationCounter::wait_for_nothing); |
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366 mcs->backedge_counter()->set_state(InvocationCounter::wait_for_nothing); |
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367 } |
1783 | 368 } |
369 | |
370 CompileTask* NonTieredCompPolicy::select_task(CompileQueue* compile_queue) { | |
371 return compile_queue->first(); | |
372 } | |
373 | |
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374 bool NonTieredCompPolicy::is_mature(Method* method) { |
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375 MethodData* mdo = method->method_data(); |
1783 | 376 assert(mdo != NULL, "Should be"); |
377 uint current = mdo->mileage_of(method); | |
378 uint initial = mdo->creation_mileage(); | |
379 if (current < initial) | |
380 return true; // some sort of overflow | |
381 uint target; | |
382 if (ProfileMaturityPercentage <= 0) | |
383 target = (uint) -ProfileMaturityPercentage; // absolute value | |
384 else | |
385 target = (uint)( (ProfileMaturityPercentage * CompileThreshold) / 100 ); | |
386 return (current >= initial + target); | |
387 } | |
388 | |
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389 nmethod* NonTieredCompPolicy::event(methodHandle method, methodHandle inlinee, int branch_bci, |
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390 int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) { |
1783 | 391 assert(comp_level == CompLevel_none, "This should be only called from the interpreter"); |
392 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci)); | |
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393 if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) { |
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394 // If certain JVMTI events (e.g. frame pop event) are requested then the |
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395 // thread is forced to remain in interpreted code. This is |
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396 // implemented partly by a check in the run_compiled_code |
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397 // section of the interpreter whether we should skip running |
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398 // compiled code, and partly by skipping OSR compiles for |
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399 // interpreted-only threads. |
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400 if (bci != InvocationEntryBci) { |
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401 reset_counter_for_back_branch_event(method); |
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402 return NULL; |
1783 | 403 } |
404 } | |
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405 if (CompileTheWorld || ReplayCompiles) { |
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406 // Don't trigger other compiles in testing mode |
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407 if (bci == InvocationEntryBci) { |
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408 reset_counter_for_invocation_event(method); |
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409 } else { |
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410 reset_counter_for_back_branch_event(method); |
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411 } |
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412 return NULL; |
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413 } |
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414 |
1783 | 415 if (bci == InvocationEntryBci) { |
416 // when code cache is full, compilation gets switched off, UseCompiler | |
417 // is set to false | |
418 if (!method->has_compiled_code() && UseCompiler) { | |
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419 method_invocation_event(method, thread); |
1783 | 420 } else { |
421 // Force counter overflow on method entry, even if no compilation | |
422 // happened. (The method_invocation_event call does this also.) | |
423 reset_counter_for_invocation_event(method); | |
424 } | |
425 // compilation at an invocation overflow no longer goes and retries test for | |
426 // compiled method. We always run the loser of the race as interpreted. | |
427 // so return NULL | |
428 return NULL; | |
429 } else { | |
430 // counter overflow in a loop => try to do on-stack-replacement | |
431 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci, CompLevel_highest_tier, true); | |
432 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci)); | |
433 // when code cache is full, we should not compile any more... | |
434 if (osr_nm == NULL && UseCompiler) { | |
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435 method_back_branch_event(method, bci, thread); |
1783 | 436 osr_nm = method->lookup_osr_nmethod_for(bci, CompLevel_highest_tier, true); |
437 } | |
438 if (osr_nm == NULL) { | |
439 reset_counter_for_back_branch_event(method); | |
440 return NULL; | |
441 } | |
442 return osr_nm; | |
443 } | |
444 return NULL; | |
445 } | |
446 | |
447 #ifndef PRODUCT | |
448 void NonTieredCompPolicy::trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci) { | |
449 if (TraceInvocationCounterOverflow) { | |
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450 MethodCounters* mcs = m->method_counters(); |
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451 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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452 InvocationCounter* ic = mcs->invocation_counter(); |
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453 InvocationCounter* bc = mcs->backedge_counter(); |
1783 | 454 ResourceMark rm; |
455 const char* msg = | |
456 bci == InvocationEntryBci | |
457 ? "comp-policy cntr ovfl @ %d in entry of " | |
458 : "comp-policy cntr ovfl @ %d in loop of "; | |
459 tty->print(msg, bci); | |
460 m->print_value(); | |
461 tty->cr(); | |
462 ic->print(); | |
463 bc->print(); | |
464 if (ProfileInterpreter) { | |
465 if (bci != InvocationEntryBci) { | |
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466 MethodData* mdo = m->method_data(); |
1783 | 467 if (mdo != NULL) { |
468 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); | |
469 tty->print_cr("back branch count = %d", count); | |
470 } | |
471 } | |
472 } | |
473 } | |
474 } | |
475 | |
476 void NonTieredCompPolicy::trace_osr_request(methodHandle method, nmethod* osr, int bci) { | |
477 if (TraceOnStackReplacement) { | |
478 ResourceMark rm; | |
479 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); | |
480 method->print_short_name(tty); | |
481 tty->print_cr(" at bci %d", bci); | |
482 } | |
483 } | |
484 #endif // !PRODUCT | |
485 | |
0 | 486 // SimpleCompPolicy - compile current method |
487 | |
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488 void SimpleCompPolicy::method_invocation_event(methodHandle m, JavaThread* thread) { |
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489 const int comp_level = CompLevel_highest_tier; |
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490 const int hot_count = m->invocation_count(); |
0 | 491 reset_counter_for_invocation_event(m); |
492 const char* comment = "count"; | |
493 | |
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494 if (is_compilation_enabled() && can_be_compiled(m, comp_level)) { |
0 | 495 nmethod* nm = m->code(); |
496 if (nm == NULL ) { | |
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497 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, m, hot_count, comment, thread); |
0 | 498 } |
499 } | |
500 } | |
501 | |
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502 void SimpleCompPolicy::method_back_branch_event(methodHandle m, int bci, JavaThread* thread) { |
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503 const int comp_level = CompLevel_highest_tier; |
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504 const int hot_count = m->backedge_count(); |
0 | 505 const char* comment = "backedge_count"; |
506 | |
12073 | 507 if (is_compilation_enabled() && can_be_osr_compiled(m, comp_level)) { |
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508 CompileBroker::compile_method(m, bci, comp_level, m, hot_count, comment, thread); |
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509 NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(bci, comp_level, true));) |
0 | 510 } |
511 } | |
512 // StackWalkCompPolicy - walk up stack to find a suitable method to compile | |
513 | |
514 #ifdef COMPILER2 | |
515 const char* StackWalkCompPolicy::_msg = NULL; | |
516 | |
517 | |
518 // Consider m for compilation | |
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519 void StackWalkCompPolicy::method_invocation_event(methodHandle m, JavaThread* thread) { |
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520 const int comp_level = CompLevel_highest_tier; |
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521 const int hot_count = m->invocation_count(); |
0 | 522 reset_counter_for_invocation_event(m); |
523 const char* comment = "count"; | |
524 | |
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525 if (is_compilation_enabled() && m->code() == NULL && can_be_compiled(m, comp_level)) { |
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526 ResourceMark rm(thread); |
0 | 527 frame fr = thread->last_frame(); |
528 assert(fr.is_interpreted_frame(), "must be interpreted"); | |
529 assert(fr.interpreter_frame_method() == m(), "bad method"); | |
530 | |
531 if (TraceCompilationPolicy) { | |
532 tty->print("method invocation trigger: "); | |
533 m->print_short_name(tty); | |
534 tty->print(" ( interpreted " INTPTR_FORMAT ", size=%d ) ", (address)m(), m->code_size()); | |
535 } | |
536 RegisterMap reg_map(thread, false); | |
537 javaVFrame* triggerVF = thread->last_java_vframe(®_map); | |
538 // triggerVF is the frame that triggered its counter | |
539 RFrame* first = new InterpretedRFrame(triggerVF->fr(), thread, m); | |
540 | |
541 if (first->top_method()->code() != NULL) { | |
542 // called obsolete method/nmethod -- no need to recompile | |
543 if (TraceCompilationPolicy) tty->print_cr(" --> " INTPTR_FORMAT, first->top_method()->code()); | |
544 } else { | |
545 if (TimeCompilationPolicy) accumulated_time()->start(); | |
546 GrowableArray<RFrame*>* stack = new GrowableArray<RFrame*>(50); | |
547 stack->push(first); | |
548 RFrame* top = findTopInlinableFrame(stack); | |
549 if (TimeCompilationPolicy) accumulated_time()->stop(); | |
550 assert(top != NULL, "findTopInlinableFrame returned null"); | |
551 if (TraceCompilationPolicy) top->print(); | |
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552 CompileBroker::compile_method(top->top_method(), InvocationEntryBci, comp_level, |
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553 m, hot_count, comment, thread); |
0 | 554 } |
555 } | |
556 } | |
557 | |
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558 void StackWalkCompPolicy::method_back_branch_event(methodHandle m, int bci, JavaThread* thread) { |
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559 const int comp_level = CompLevel_highest_tier; |
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560 const int hot_count = m->backedge_count(); |
0 | 561 const char* comment = "backedge_count"; |
562 | |
12073 | 563 if (is_compilation_enabled() && can_be_osr_compiled(m, comp_level)) { |
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564 CompileBroker::compile_method(m, bci, comp_level, m, hot_count, comment, thread); |
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565 NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(bci, comp_level, true));) |
0 | 566 } |
567 } | |
568 | |
569 RFrame* StackWalkCompPolicy::findTopInlinableFrame(GrowableArray<RFrame*>* stack) { | |
570 // go up the stack until finding a frame that (probably) won't be inlined | |
571 // into its caller | |
572 RFrame* current = stack->at(0); // current choice for stopping | |
573 assert( current && !current->is_compiled(), "" ); | |
574 const char* msg = NULL; | |
575 | |
576 while (1) { | |
577 | |
578 // before going up the stack further, check if doing so would get us into | |
579 // compiled code | |
580 RFrame* next = senderOf(current, stack); | |
581 if( !next ) // No next frame up the stack? | |
582 break; // Then compile with current frame | |
583 | |
584 methodHandle m = current->top_method(); | |
585 methodHandle next_m = next->top_method(); | |
586 | |
587 if (TraceCompilationPolicy && Verbose) { | |
588 tty->print("[caller: "); | |
589 next_m->print_short_name(tty); | |
590 tty->print("] "); | |
591 } | |
592 | |
593 if( !Inline ) { // Inlining turned off | |
594 msg = "Inlining turned off"; | |
595 break; | |
596 } | |
597 if (next_m->is_not_compilable()) { // Did fail to compile this before/ | |
598 msg = "caller not compilable"; | |
599 break; | |
600 } | |
601 if (next->num() > MaxRecompilationSearchLength) { | |
602 // don't go up too high when searching for recompilees | |
603 msg = "don't go up any further: > MaxRecompilationSearchLength"; | |
604 break; | |
605 } | |
606 if (next->distance() > MaxInterpretedSearchLength) { | |
607 // don't go up too high when searching for recompilees | |
608 msg = "don't go up any further: next > MaxInterpretedSearchLength"; | |
609 break; | |
610 } | |
611 // Compiled frame above already decided not to inline; | |
612 // do not recompile him. | |
613 if (next->is_compiled()) { | |
614 msg = "not going up into optimized code"; | |
615 break; | |
616 } | |
617 | |
618 // Interpreted frame above us was already compiled. Do not force | |
619 // a recompile, although if the frame above us runs long enough an | |
620 // OSR might still happen. | |
621 if( current->is_interpreted() && next_m->has_compiled_code() ) { | |
622 msg = "not going up -- already compiled caller"; | |
623 break; | |
624 } | |
625 | |
626 // Compute how frequent this call site is. We have current method 'm'. | |
627 // We know next method 'next_m' is interpreted. Find the call site and | |
628 // check the various invocation counts. | |
629 int invcnt = 0; // Caller counts | |
630 if (ProfileInterpreter) { | |
631 invcnt = next_m->interpreter_invocation_count(); | |
632 } | |
633 int cnt = 0; // Call site counts | |
634 if (ProfileInterpreter && next_m->method_data() != NULL) { | |
635 ResourceMark rm; | |
636 int bci = next->top_vframe()->bci(); | |
637 ProfileData* data = next_m->method_data()->bci_to_data(bci); | |
638 if (data != NULL && data->is_CounterData()) | |
639 cnt = data->as_CounterData()->count(); | |
640 } | |
641 | |
642 // Caller counts / call-site counts; i.e. is this call site | |
643 // a hot call site for method next_m? | |
644 int freq = (invcnt) ? cnt/invcnt : cnt; | |
645 | |
646 // Check size and frequency limits | |
647 if ((msg = shouldInline(m, freq, cnt)) != NULL) { | |
648 break; | |
649 } | |
650 // Check inlining negative tests | |
651 if ((msg = shouldNotInline(m)) != NULL) { | |
652 break; | |
653 } | |
654 | |
655 | |
656 // If the caller method is too big or something then we do not want to | |
657 // compile it just to inline a method | |
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658 if (!can_be_compiled(next_m, CompLevel_any)) { |
0 | 659 msg = "caller cannot be compiled"; |
660 break; | |
661 } | |
662 | |
663 if( next_m->name() == vmSymbols::class_initializer_name() ) { | |
664 msg = "do not compile class initializer (OSR ok)"; | |
665 break; | |
666 } | |
667 | |
668 if (TraceCompilationPolicy && Verbose) { | |
669 tty->print("\n\t check caller: "); | |
670 next_m->print_short_name(tty); | |
671 tty->print(" ( interpreted " INTPTR_FORMAT ", size=%d ) ", (address)next_m(), next_m->code_size()); | |
672 } | |
673 | |
674 current = next; | |
675 } | |
676 | |
677 assert( !current || !current->is_compiled(), "" ); | |
678 | |
679 if (TraceCompilationPolicy && msg) tty->print("(%s)\n", msg); | |
680 | |
681 return current; | |
682 } | |
683 | |
684 RFrame* StackWalkCompPolicy::senderOf(RFrame* rf, GrowableArray<RFrame*>* stack) { | |
685 RFrame* sender = rf->caller(); | |
686 if (sender && sender->num() == stack->length()) stack->push(sender); | |
687 return sender; | |
688 } | |
689 | |
690 | |
691 const char* StackWalkCompPolicy::shouldInline(methodHandle m, float freq, int cnt) { | |
692 // Allows targeted inlining | |
693 // positive filter: should send be inlined? returns NULL (--> yes) | |
694 // or rejection msg | |
695 int max_size = MaxInlineSize; | |
696 int cost = m->code_size(); | |
697 | |
698 // Check for too many throws (and not too huge) | |
699 if (m->interpreter_throwout_count() > InlineThrowCount && cost < InlineThrowMaxSize ) { | |
700 return NULL; | |
701 } | |
702 | |
703 // bump the max size if the call is frequent | |
704 if ((freq >= InlineFrequencyRatio) || (cnt >= InlineFrequencyCount)) { | |
705 if (TraceFrequencyInlining) { | |
706 tty->print("(Inlined frequent method)\n"); | |
707 m->print(); | |
708 } | |
709 max_size = FreqInlineSize; | |
710 } | |
711 if (cost > max_size) { | |
712 return (_msg = "too big"); | |
713 } | |
714 return NULL; | |
715 } | |
716 | |
717 | |
718 const char* StackWalkCompPolicy::shouldNotInline(methodHandle m) { | |
719 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg | |
720 if (m->is_abstract()) return (_msg = "abstract method"); | |
721 // note: we allow ik->is_abstract() | |
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722 if (!m->method_holder()->is_initialized()) return (_msg = "method holder not initialized"); |
0 | 723 if (m->is_native()) return (_msg = "native method"); |
724 nmethod* m_code = m->code(); | |
1748 | 725 if (m_code != NULL && m_code->code_size() > InlineSmallCode) |
0 | 726 return (_msg = "already compiled into a big method"); |
727 | |
728 // use frequency-based objections only for non-trivial methods | |
729 if (m->code_size() <= MaxTrivialSize) return NULL; | |
730 if (UseInterpreter) { // don't use counts with -Xcomp | |
731 if ((m->code() == NULL) && m->was_never_executed()) return (_msg = "never executed"); | |
732 if (!m->was_executed_more_than(MIN2(MinInliningThreshold, CompileThreshold >> 1))) return (_msg = "executed < MinInliningThreshold times"); | |
733 } | |
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734 if (Method::has_unloaded_classes_in_signature(m, JavaThread::current())) return (_msg = "unloaded signature classes"); |
0 | 735 |
736 return NULL; | |
737 } | |
738 | |
739 | |
740 | |
741 #endif // COMPILER2 |