Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/compilationPolicy.cpp @ 14012:1f34717ccafa
remove CompilerToVM.getInstanceFields
author | twisti |
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date | Mon, 24 Feb 2014 15:08:02 -0800 |
parents | 0995dcbd6dd8 |
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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 if (CompilationPolicy::can_be_offloaded_to_gpu(m)) return true; |
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109 |
1783 | 110 if (!can_be_compiled(m, comp_level)) return false; |
0 | 111 |
112 return !UseInterpreter || // must compile all methods | |
1202 | 113 (UseCompiler && AlwaysCompileLoopMethods && m->has_loops() && CompileBroker::should_compile_new_jobs()); // eagerly compile loop methods |
0 | 114 } |
115 | |
116 // Returns true if m is allowed to be compiled | |
1783 | 117 bool CompilationPolicy::can_be_compiled(methodHandle m, int comp_level) { |
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118 // allow any levels for WhiteBox |
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119 assert(WhiteBoxAPI || comp_level == CompLevel_all || is_compile(comp_level), "illegal compilation level"); |
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120 |
0 | 121 if (m->is_abstract()) return false; |
122 if (DontCompileHugeMethods && m->code_size() > HugeMethodLimit) return false; | |
123 | |
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124 // Math intrinsics should never be compiled as this can lead to |
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125 // monotonicity problems because the interpreter will prefer the |
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126 // compiled code to the intrinsic version. This can't happen in |
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127 // production because the invocation counter can't be incremented |
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128 // but we shouldn't expose the system to this problem in testing |
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129 // modes. |
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130 if (!AbstractInterpreter::can_be_compiled(m)) { |
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131 return false; |
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132 } |
1783 | 133 if (comp_level == CompLevel_all) { |
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134 if (TieredCompilation) { |
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135 // enough to be compilable at any level for tiered |
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136 return !m->is_not_compilable(CompLevel_simple) || !m->is_not_compilable(CompLevel_full_optimization); |
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137 } else { |
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138 // must be compilable at available level for non-tiered |
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139 return !m->is_not_compilable(CompLevel_highest_tier); |
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140 } |
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141 } else if (is_compile(comp_level)) { |
1783 | 142 return !m->is_not_compilable(comp_level); |
143 } | |
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144 return false; |
1783 | 145 } |
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146 |
12073 | 147 // Returns true if m is allowed to be osr compiled |
148 bool CompilationPolicy::can_be_osr_compiled(methodHandle m, int comp_level) { | |
149 bool result = false; | |
150 if (comp_level == CompLevel_all) { | |
151 if (TieredCompilation) { | |
152 // enough to be osr compilable at any level for tiered | |
153 result = !m->is_not_osr_compilable(CompLevel_simple) || !m->is_not_osr_compilable(CompLevel_full_optimization); | |
154 } else { | |
155 // must be osr compilable at available level for non-tiered | |
156 result = !m->is_not_osr_compilable(CompLevel_highest_tier); | |
157 } | |
158 } else if (is_compile(comp_level)) { | |
159 result = !m->is_not_osr_compilable(comp_level); | |
160 } | |
161 return (result && can_be_compiled(m, comp_level)); | |
162 } | |
163 | |
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164 bool CompilationPolicy::can_be_offloaded_to_gpu(methodHandle m) { |
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165 #ifdef GRAAL |
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166 if (GPUOffload && gpu::initialized_gpus() > 0) { |
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167 // Check if this method can be off-loaded to GPU. |
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168 if (m->is_synthetic()) { |
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169 // A lambda method is a synthetic method. |
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170 Symbol * klass_name = m->method_holder()->name(); |
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171 Symbol * method_name = m->name(); |
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172 { |
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173 ResourceMark rm; |
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174 if (klass_name != NULL) { |
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175 const char* javaClass = "java/"; |
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176 // Exclude java library classes - for now |
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177 if (strncmp(klass_name->as_C_string(), javaClass, strlen(javaClass))) { |
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178 if (method_name != NULL) { |
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179 const char* lambdaPrefix = "lambda$"; |
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180 char* methodPrefix = strstr(method_name->as_C_string(), lambdaPrefix); |
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181 if (methodPrefix != 0) { |
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182 if ((strncmp(lambdaPrefix, methodPrefix, strlen(lambdaPrefix)) == 0)) { |
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183 if (TraceGPUInteraction) { |
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184 char buf[O_BUFLEN]; |
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185 tty->print_cr("Selected lambda method %s for GPU offload", m->name_and_sig_as_C_string(buf, O_BUFLEN)); |
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186 } |
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187 return true; |
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188 } |
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189 } |
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190 } |
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191 } |
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192 } |
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193 } |
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194 } |
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195 } |
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196 #endif |
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197 return false; |
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198 } |
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199 |
1783 | 200 bool CompilationPolicy::is_compilation_enabled() { |
201 // NOTE: CompileBroker::should_compile_new_jobs() checks for UseCompiler | |
202 return !delay_compilation_during_startup() && CompileBroker::should_compile_new_jobs(); | |
0 | 203 } |
204 | |
205 #ifndef PRODUCT | |
206 void CompilationPolicy::print_time() { | |
207 tty->print_cr ("Accumulated compilationPolicy times:"); | |
208 tty->print_cr ("---------------------------"); | |
209 tty->print_cr (" Total: %3.3f sec.", _accumulated_time.seconds()); | |
210 } | |
211 | |
1783 | 212 void NonTieredCompPolicy::trace_osr_completion(nmethod* osr_nm) { |
0 | 213 if (TraceOnStackReplacement) { |
214 if (osr_nm == NULL) tty->print_cr("compilation failed"); | |
215 else tty->print_cr("nmethod " INTPTR_FORMAT, osr_nm); | |
216 } | |
217 } | |
218 #endif // !PRODUCT | |
219 | |
1783 | 220 void NonTieredCompPolicy::initialize() { |
221 // Setup the compiler thread numbers | |
222 if (CICompilerCountPerCPU) { | |
223 // Example: if CICompilerCountPerCPU is true, then we get | |
224 // max(log2(8)-1,1) = 2 compiler threads on an 8-way machine. | |
225 // May help big-app startup time. | |
226 _compiler_count = MAX2(log2_intptr(os::active_processor_count())-1,1); | |
227 } else { | |
228 _compiler_count = CICompilerCount; | |
229 } | |
230 } | |
231 | |
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232 // Note: this policy is used ONLY if TieredCompilation is off. |
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233 // compiler_count() behaves the following way: |
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234 // - with TIERED build (with both COMPILER1 and COMPILER2 defined) it should return |
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235 // zero for the c1 compilation levels, hence the particular ordering of the |
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236 // statements. |
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237 // - the same should happen when COMPILER2 is defined and COMPILER1 is not |
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238 // (server build without TIERED defined). |
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239 // - if only COMPILER1 is defined (client build), zero should be returned for |
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240 // the c2 level. |
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241 // - if neither is defined - always return zero. |
1783 | 242 int NonTieredCompPolicy::compiler_count(CompLevel comp_level) { |
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243 assert(!TieredCompilation, "This policy should not be used with TieredCompilation"); |
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244 #ifdef COMPILER2 |
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245 if (is_c2_compile(comp_level)) { |
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246 return _compiler_count; |
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247 } else { |
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248 return 0; |
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249 } |
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250 #endif |
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251 |
1783 | 252 #ifdef COMPILER1 |
253 if (is_c1_compile(comp_level)) { | |
254 return _compiler_count; | |
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255 } else { |
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256 return 0; |
1783 | 257 } |
258 #endif | |
259 | |
260 return 0; | |
261 } | |
262 | |
263 void NonTieredCompPolicy::reset_counter_for_invocation_event(methodHandle m) { | |
0 | 264 // Make sure invocation and backedge counter doesn't overflow again right away |
265 // as would be the case for native methods. | |
266 | |
267 // BUT also make sure the method doesn't look like it was never executed. | |
268 // Set carry bit and reduce counter's value to min(count, CompileThreshold/2). | |
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269 MethodCounters* mcs = m->method_counters(); |
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270 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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271 mcs->invocation_counter()->set_carry(); |
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272 mcs->backedge_counter()->set_carry(); |
0 | 273 |
274 assert(!m->was_never_executed(), "don't reset to 0 -- could be mistaken for never-executed"); | |
275 } | |
276 | |
1783 | 277 void NonTieredCompPolicy::reset_counter_for_back_branch_event(methodHandle m) { |
0 | 278 // Delay next back-branch event but pump up invocation counter to triger |
279 // whole method compilation. | |
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280 MethodCounters* mcs = m->method_counters(); |
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281 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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282 InvocationCounter* i = mcs->invocation_counter(); |
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283 InvocationCounter* b = mcs->backedge_counter(); |
0 | 284 |
285 // Don't set invocation_counter's value too low otherwise the method will | |
286 // look like immature (ic < ~5300) which prevents the inlining based on | |
287 // the type profiling. | |
288 i->set(i->state(), CompileThreshold); | |
289 // Don't reset counter too low - it is used to check if OSR method is ready. | |
290 b->set(b->state(), CompileThreshold / 2); | |
291 } | |
292 | |
1783 | 293 // |
294 // CounterDecay | |
295 // | |
296 // Interates through invocation counters and decrements them. This | |
297 // is done at each safepoint. | |
298 // | |
299 class CounterDecay : public AllStatic { | |
300 static jlong _last_timestamp; | |
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301 static void do_method(Method* m) { |
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302 MethodCounters* mcs = m->method_counters(); |
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303 if (mcs != NULL) { |
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304 mcs->invocation_counter()->decay(); |
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305 } |
1783 | 306 } |
307 public: | |
308 static void decay(); | |
309 static bool is_decay_needed() { | |
310 return (os::javaTimeMillis() - _last_timestamp) > CounterDecayMinIntervalLength; | |
311 } | |
312 }; | |
313 | |
314 jlong CounterDecay::_last_timestamp = 0; | |
315 | |
316 void CounterDecay::decay() { | |
317 _last_timestamp = os::javaTimeMillis(); | |
318 | |
319 // This operation is going to be performed only at the end of a safepoint | |
320 // and hence GC's will not be going on, all Java mutators are suspended | |
321 // at this point and hence SystemDictionary_lock is also not needed. | |
322 assert(SafepointSynchronize::is_at_safepoint(), "can only be executed at a safepoint"); | |
323 int nclasses = SystemDictionary::number_of_classes(); | |
324 double classes_per_tick = nclasses * (CounterDecayMinIntervalLength * 1e-3 / | |
325 CounterHalfLifeTime); | |
326 for (int i = 0; i < classes_per_tick; i++) { | |
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327 Klass* k = SystemDictionary::try_get_next_class(); |
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328 if (k != NULL && k->oop_is_instance()) { |
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329 InstanceKlass::cast(k)->methods_do(do_method); |
1783 | 330 } |
331 } | |
332 } | |
333 | |
334 // Called at the end of the safepoint | |
335 void NonTieredCompPolicy::do_safepoint_work() { | |
336 if(UseCounterDecay && CounterDecay::is_decay_needed()) { | |
337 CounterDecay::decay(); | |
338 } | |
339 } | |
340 | |
341 void NonTieredCompPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { | |
342 ScopeDesc* sd = trap_scope; | |
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343 MethodCounters* mcs; |
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344 InvocationCounter* c; |
1783 | 345 for (; !sd->is_top(); sd = sd->sender()) { |
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346 mcs = sd->method()->method_counters(); |
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347 if (mcs != NULL) { |
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348 // Reset ICs of inlined methods, since they can trigger compilations also. |
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349 mcs->invocation_counter()->reset(); |
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350 } |
1783 | 351 } |
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352 mcs = sd->method()->method_counters(); |
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353 if (mcs != NULL) { |
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354 c = mcs->invocation_counter(); |
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355 if (is_osr) { |
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356 // It was an OSR method, so bump the count higher. |
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357 c->set(c->state(), CompileThreshold); |
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358 } else { |
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359 c->reset(); |
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360 } |
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361 mcs->backedge_counter()->reset(); |
1783 | 362 } |
363 } | |
364 | |
365 // This method can be called by any component of the runtime to notify the policy | |
366 // that it's recommended to delay the complation of this method. | |
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367 void NonTieredCompPolicy::delay_compilation(Method* method) { |
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368 MethodCounters* mcs = method->method_counters(); |
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369 if (mcs != NULL) { |
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370 mcs->invocation_counter()->decay(); |
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371 mcs->backedge_counter()->decay(); |
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372 } |
1783 | 373 } |
374 | |
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375 void NonTieredCompPolicy::disable_compilation(Method* method) { |
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376 MethodCounters* mcs = method->method_counters(); |
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377 if (mcs != NULL) { |
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378 mcs->invocation_counter()->set_state(InvocationCounter::wait_for_nothing); |
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379 mcs->backedge_counter()->set_state(InvocationCounter::wait_for_nothing); |
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380 } |
1783 | 381 } |
382 | |
383 CompileTask* NonTieredCompPolicy::select_task(CompileQueue* compile_queue) { | |
384 return compile_queue->first(); | |
385 } | |
386 | |
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387 bool NonTieredCompPolicy::is_mature(Method* method) { |
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388 MethodData* mdo = method->method_data(); |
1783 | 389 assert(mdo != NULL, "Should be"); |
390 uint current = mdo->mileage_of(method); | |
391 uint initial = mdo->creation_mileage(); | |
392 if (current < initial) | |
393 return true; // some sort of overflow | |
394 uint target; | |
395 if (ProfileMaturityPercentage <= 0) | |
396 target = (uint) -ProfileMaturityPercentage; // absolute value | |
397 else | |
398 target = (uint)( (ProfileMaturityPercentage * CompileThreshold) / 100 ); | |
399 return (current >= initial + target); | |
400 } | |
401 | |
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402 nmethod* NonTieredCompPolicy::event(methodHandle method, methodHandle inlinee, int branch_bci, |
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403 int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) { |
1783 | 404 assert(comp_level == CompLevel_none, "This should be only called from the interpreter"); |
405 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci)); | |
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406 if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) { |
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407 // If certain JVMTI events (e.g. frame pop event) are requested then the |
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408 // thread is forced to remain in interpreted code. This is |
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409 // implemented partly by a check in the run_compiled_code |
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410 // section of the interpreter whether we should skip running |
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411 // compiled code, and partly by skipping OSR compiles for |
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412 // interpreted-only threads. |
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413 if (bci != InvocationEntryBci) { |
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414 reset_counter_for_back_branch_event(method); |
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415 return NULL; |
1783 | 416 } |
417 } | |
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418 if (CompileTheWorld || ReplayCompiles) { |
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419 // Don't trigger other compiles in testing mode |
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420 if (bci == InvocationEntryBci) { |
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421 reset_counter_for_invocation_event(method); |
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422 } else { |
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423 reset_counter_for_back_branch_event(method); |
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424 } |
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425 return NULL; |
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426 } |
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427 |
1783 | 428 if (bci == InvocationEntryBci) { |
429 // when code cache is full, compilation gets switched off, UseCompiler | |
430 // is set to false | |
431 if (!method->has_compiled_code() && UseCompiler) { | |
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432 method_invocation_event(method, thread); |
1783 | 433 } else { |
434 // Force counter overflow on method entry, even if no compilation | |
435 // happened. (The method_invocation_event call does this also.) | |
436 reset_counter_for_invocation_event(method); | |
437 } | |
438 // compilation at an invocation overflow no longer goes and retries test for | |
439 // compiled method. We always run the loser of the race as interpreted. | |
440 // so return NULL | |
441 return NULL; | |
442 } else { | |
443 // counter overflow in a loop => try to do on-stack-replacement | |
444 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci, CompLevel_highest_tier, true); | |
445 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci)); | |
446 // when code cache is full, we should not compile any more... | |
447 if (osr_nm == NULL && UseCompiler) { | |
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448 method_back_branch_event(method, bci, thread); |
1783 | 449 osr_nm = method->lookup_osr_nmethod_for(bci, CompLevel_highest_tier, true); |
450 } | |
451 if (osr_nm == NULL) { | |
452 reset_counter_for_back_branch_event(method); | |
453 return NULL; | |
454 } | |
455 return osr_nm; | |
456 } | |
457 return NULL; | |
458 } | |
459 | |
460 #ifndef PRODUCT | |
461 void NonTieredCompPolicy::trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci) { | |
462 if (TraceInvocationCounterOverflow) { | |
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463 MethodCounters* mcs = m->method_counters(); |
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464 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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465 InvocationCounter* ic = mcs->invocation_counter(); |
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466 InvocationCounter* bc = mcs->backedge_counter(); |
1783 | 467 ResourceMark rm; |
468 const char* msg = | |
469 bci == InvocationEntryBci | |
470 ? "comp-policy cntr ovfl @ %d in entry of " | |
471 : "comp-policy cntr ovfl @ %d in loop of "; | |
472 tty->print(msg, bci); | |
473 m->print_value(); | |
474 tty->cr(); | |
475 ic->print(); | |
476 bc->print(); | |
477 if (ProfileInterpreter) { | |
478 if (bci != InvocationEntryBci) { | |
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479 MethodData* mdo = m->method_data(); |
1783 | 480 if (mdo != NULL) { |
481 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); | |
482 tty->print_cr("back branch count = %d", count); | |
483 } | |
484 } | |
485 } | |
486 } | |
487 } | |
488 | |
489 void NonTieredCompPolicy::trace_osr_request(methodHandle method, nmethod* osr, int bci) { | |
490 if (TraceOnStackReplacement) { | |
491 ResourceMark rm; | |
492 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); | |
493 method->print_short_name(tty); | |
494 tty->print_cr(" at bci %d", bci); | |
495 } | |
496 } | |
497 #endif // !PRODUCT | |
498 | |
0 | 499 // SimpleCompPolicy - compile current method |
500 | |
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501 void SimpleCompPolicy::method_invocation_event(methodHandle m, JavaThread* thread) { |
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502 const int comp_level = CompLevel_highest_tier; |
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503 const int hot_count = m->invocation_count(); |
0 | 504 reset_counter_for_invocation_event(m); |
505 const char* comment = "count"; | |
506 | |
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507 if (is_compilation_enabled() && can_be_compiled(m, comp_level)) { |
0 | 508 nmethod* nm = m->code(); |
509 if (nm == NULL ) { | |
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510 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, m, hot_count, comment, thread); |
0 | 511 } |
512 } | |
513 } | |
514 | |
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515 void SimpleCompPolicy::method_back_branch_event(methodHandle m, int bci, JavaThread* thread) { |
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516 const int comp_level = CompLevel_highest_tier; |
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517 const int hot_count = m->backedge_count(); |
0 | 518 const char* comment = "backedge_count"; |
519 | |
12073 | 520 if (is_compilation_enabled() && can_be_osr_compiled(m, comp_level)) { |
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521 CompileBroker::compile_method(m, bci, comp_level, m, hot_count, comment, thread); |
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522 NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(bci, comp_level, true));) |
0 | 523 } |
524 } | |
525 // StackWalkCompPolicy - walk up stack to find a suitable method to compile | |
526 | |
527 #ifdef COMPILER2 | |
528 const char* StackWalkCompPolicy::_msg = NULL; | |
529 | |
530 | |
531 // Consider m for compilation | |
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532 void StackWalkCompPolicy::method_invocation_event(methodHandle m, JavaThread* thread) { |
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533 const int comp_level = CompLevel_highest_tier; |
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534 const int hot_count = m->invocation_count(); |
0 | 535 reset_counter_for_invocation_event(m); |
536 const char* comment = "count"; | |
537 | |
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538 if (is_compilation_enabled() && m->code() == NULL && can_be_compiled(m, comp_level)) { |
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539 ResourceMark rm(thread); |
0 | 540 frame fr = thread->last_frame(); |
541 assert(fr.is_interpreted_frame(), "must be interpreted"); | |
542 assert(fr.interpreter_frame_method() == m(), "bad method"); | |
543 | |
544 if (TraceCompilationPolicy) { | |
545 tty->print("method invocation trigger: "); | |
546 m->print_short_name(tty); | |
547 tty->print(" ( interpreted " INTPTR_FORMAT ", size=%d ) ", (address)m(), m->code_size()); | |
548 } | |
549 RegisterMap reg_map(thread, false); | |
550 javaVFrame* triggerVF = thread->last_java_vframe(®_map); | |
551 // triggerVF is the frame that triggered its counter | |
552 RFrame* first = new InterpretedRFrame(triggerVF->fr(), thread, m); | |
553 | |
554 if (first->top_method()->code() != NULL) { | |
555 // called obsolete method/nmethod -- no need to recompile | |
556 if (TraceCompilationPolicy) tty->print_cr(" --> " INTPTR_FORMAT, first->top_method()->code()); | |
557 } else { | |
558 if (TimeCompilationPolicy) accumulated_time()->start(); | |
559 GrowableArray<RFrame*>* stack = new GrowableArray<RFrame*>(50); | |
560 stack->push(first); | |
561 RFrame* top = findTopInlinableFrame(stack); | |
562 if (TimeCompilationPolicy) accumulated_time()->stop(); | |
563 assert(top != NULL, "findTopInlinableFrame returned null"); | |
564 if (TraceCompilationPolicy) top->print(); | |
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565 CompileBroker::compile_method(top->top_method(), InvocationEntryBci, comp_level, |
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566 m, hot_count, comment, thread); |
0 | 567 } |
568 } | |
569 } | |
570 | |
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571 void StackWalkCompPolicy::method_back_branch_event(methodHandle m, int bci, JavaThread* thread) { |
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572 const int comp_level = CompLevel_highest_tier; |
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573 const int hot_count = m->backedge_count(); |
0 | 574 const char* comment = "backedge_count"; |
575 | |
12073 | 576 if (is_compilation_enabled() && can_be_osr_compiled(m, comp_level)) { |
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577 CompileBroker::compile_method(m, bci, comp_level, m, hot_count, comment, thread); |
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578 NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(bci, comp_level, true));) |
0 | 579 } |
580 } | |
581 | |
582 RFrame* StackWalkCompPolicy::findTopInlinableFrame(GrowableArray<RFrame*>* stack) { | |
583 // go up the stack until finding a frame that (probably) won't be inlined | |
584 // into its caller | |
585 RFrame* current = stack->at(0); // current choice for stopping | |
586 assert( current && !current->is_compiled(), "" ); | |
587 const char* msg = NULL; | |
588 | |
589 while (1) { | |
590 | |
591 // before going up the stack further, check if doing so would get us into | |
592 // compiled code | |
593 RFrame* next = senderOf(current, stack); | |
594 if( !next ) // No next frame up the stack? | |
595 break; // Then compile with current frame | |
596 | |
597 methodHandle m = current->top_method(); | |
598 methodHandle next_m = next->top_method(); | |
599 | |
600 if (TraceCompilationPolicy && Verbose) { | |
601 tty->print("[caller: "); | |
602 next_m->print_short_name(tty); | |
603 tty->print("] "); | |
604 } | |
605 | |
606 if( !Inline ) { // Inlining turned off | |
607 msg = "Inlining turned off"; | |
608 break; | |
609 } | |
610 if (next_m->is_not_compilable()) { // Did fail to compile this before/ | |
611 msg = "caller not compilable"; | |
612 break; | |
613 } | |
614 if (next->num() > MaxRecompilationSearchLength) { | |
615 // don't go up too high when searching for recompilees | |
616 msg = "don't go up any further: > MaxRecompilationSearchLength"; | |
617 break; | |
618 } | |
619 if (next->distance() > MaxInterpretedSearchLength) { | |
620 // don't go up too high when searching for recompilees | |
621 msg = "don't go up any further: next > MaxInterpretedSearchLength"; | |
622 break; | |
623 } | |
624 // Compiled frame above already decided not to inline; | |
625 // do not recompile him. | |
626 if (next->is_compiled()) { | |
627 msg = "not going up into optimized code"; | |
628 break; | |
629 } | |
630 | |
631 // Interpreted frame above us was already compiled. Do not force | |
632 // a recompile, although if the frame above us runs long enough an | |
633 // OSR might still happen. | |
634 if( current->is_interpreted() && next_m->has_compiled_code() ) { | |
635 msg = "not going up -- already compiled caller"; | |
636 break; | |
637 } | |
638 | |
639 // Compute how frequent this call site is. We have current method 'm'. | |
640 // We know next method 'next_m' is interpreted. Find the call site and | |
641 // check the various invocation counts. | |
642 int invcnt = 0; // Caller counts | |
643 if (ProfileInterpreter) { | |
644 invcnt = next_m->interpreter_invocation_count(); | |
645 } | |
646 int cnt = 0; // Call site counts | |
647 if (ProfileInterpreter && next_m->method_data() != NULL) { | |
648 ResourceMark rm; | |
649 int bci = next->top_vframe()->bci(); | |
650 ProfileData* data = next_m->method_data()->bci_to_data(bci); | |
651 if (data != NULL && data->is_CounterData()) | |
652 cnt = data->as_CounterData()->count(); | |
653 } | |
654 | |
655 // Caller counts / call-site counts; i.e. is this call site | |
656 // a hot call site for method next_m? | |
657 int freq = (invcnt) ? cnt/invcnt : cnt; | |
658 | |
659 // Check size and frequency limits | |
660 if ((msg = shouldInline(m, freq, cnt)) != NULL) { | |
661 break; | |
662 } | |
663 // Check inlining negative tests | |
664 if ((msg = shouldNotInline(m)) != NULL) { | |
665 break; | |
666 } | |
667 | |
668 | |
669 // If the caller method is too big or something then we do not want to | |
670 // compile it just to inline a method | |
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671 if (!can_be_compiled(next_m, CompLevel_any)) { |
0 | 672 msg = "caller cannot be compiled"; |
673 break; | |
674 } | |
675 | |
676 if( next_m->name() == vmSymbols::class_initializer_name() ) { | |
677 msg = "do not compile class initializer (OSR ok)"; | |
678 break; | |
679 } | |
680 | |
681 if (TraceCompilationPolicy && Verbose) { | |
682 tty->print("\n\t check caller: "); | |
683 next_m->print_short_name(tty); | |
684 tty->print(" ( interpreted " INTPTR_FORMAT ", size=%d ) ", (address)next_m(), next_m->code_size()); | |
685 } | |
686 | |
687 current = next; | |
688 } | |
689 | |
690 assert( !current || !current->is_compiled(), "" ); | |
691 | |
692 if (TraceCompilationPolicy && msg) tty->print("(%s)\n", msg); | |
693 | |
694 return current; | |
695 } | |
696 | |
697 RFrame* StackWalkCompPolicy::senderOf(RFrame* rf, GrowableArray<RFrame*>* stack) { | |
698 RFrame* sender = rf->caller(); | |
699 if (sender && sender->num() == stack->length()) stack->push(sender); | |
700 return sender; | |
701 } | |
702 | |
703 | |
704 const char* StackWalkCompPolicy::shouldInline(methodHandle m, float freq, int cnt) { | |
705 // Allows targeted inlining | |
706 // positive filter: should send be inlined? returns NULL (--> yes) | |
707 // or rejection msg | |
708 int max_size = MaxInlineSize; | |
709 int cost = m->code_size(); | |
710 | |
711 // Check for too many throws (and not too huge) | |
712 if (m->interpreter_throwout_count() > InlineThrowCount && cost < InlineThrowMaxSize ) { | |
713 return NULL; | |
714 } | |
715 | |
716 // bump the max size if the call is frequent | |
717 if ((freq >= InlineFrequencyRatio) || (cnt >= InlineFrequencyCount)) { | |
718 if (TraceFrequencyInlining) { | |
719 tty->print("(Inlined frequent method)\n"); | |
720 m->print(); | |
721 } | |
722 max_size = FreqInlineSize; | |
723 } | |
724 if (cost > max_size) { | |
725 return (_msg = "too big"); | |
726 } | |
727 return NULL; | |
728 } | |
729 | |
730 | |
731 const char* StackWalkCompPolicy::shouldNotInline(methodHandle m) { | |
732 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg | |
733 if (m->is_abstract()) return (_msg = "abstract method"); | |
734 // note: we allow ik->is_abstract() | |
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735 if (!m->method_holder()->is_initialized()) return (_msg = "method holder not initialized"); |
0 | 736 if (m->is_native()) return (_msg = "native method"); |
737 nmethod* m_code = m->code(); | |
1748 | 738 if (m_code != NULL && m_code->code_size() > InlineSmallCode) |
0 | 739 return (_msg = "already compiled into a big method"); |
740 | |
741 // use frequency-based objections only for non-trivial methods | |
742 if (m->code_size() <= MaxTrivialSize) return NULL; | |
743 if (UseInterpreter) { // don't use counts with -Xcomp | |
744 if ((m->code() == NULL) && m->was_never_executed()) return (_msg = "never executed"); | |
745 if (!m->was_executed_more_than(MIN2(MinInliningThreshold, CompileThreshold >> 1))) return (_msg = "executed < MinInliningThreshold times"); | |
746 } | |
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747 if (Method::has_unloaded_classes_in_signature(m, JavaThread::current())) return (_msg = "unloaded signature classes"); |
0 | 748 |
749 return NULL; | |
750 } | |
751 | |
752 | |
753 | |
754 #endif // COMPILER2 |