Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/compilationPolicy.cpp @ 13731:9161ed8ce796
Add graal-specific option -XX:+GPUOffload to trigger all GPU offload functionality. Cleanup function to decide GPU offload. Exclude GPU sources from nongraal builds.
| author | S.Bharadwaj Yadavalli <bharadwaj.yadavalli@oracle.com> |
|---|---|
| date | Wed, 22 Jan 2014 16:06:47 -0500 |
| parents | de839ec35cc7 |
| children | 49db2c1e3bee |
| rev | line source |
|---|---|
| 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) { |
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167 // Check if this method can be offloaded to GPU. |
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168 // 1. Offload it to GPU if it is a Lambda method |
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169 if (m->is_synthetic()) { |
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170 // A lambda method is a syntheric method. |
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171 Symbol * klass_name = m->method_holder()->name(); |
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172 Symbol * method_name = m->name(); |
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173 bool offloadToGPU = false; |
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174 { |
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175 ResourceMark rm; |
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176 if (klass_name != NULL) { |
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177 if (klass_name != NULL && method_name != NULL) { |
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178 const char* lambdaPrefix = "lambda$"; |
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179 char* methodPrefix = strstr(method_name->as_C_string(), lambdaPrefix); |
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180 if (methodPrefix != 0) { |
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181 if ((strncmp(lambdaPrefix, methodPrefix, strlen(lambdaPrefix)) == 0)) { |
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182 offloadToGPU = true; |
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183 } |
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184 } |
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185 } |
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186 } |
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187 } |
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188 if (offloadToGPU) { |
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189 // If GPU is available and the necessary linkage is available |
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190 // return true indicatin that this method must be compiled. |
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191 if (gpu::is_available() && gpu::has_gpu_linkage()) { |
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192 if (TraceGPUInteraction) { |
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193 tty->print("Compiling Lambda method "); |
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194 m->print_short_name(); |
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195 switch (gpu::get_target_il_type()) { |
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196 case gpu::PTX : |
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197 tty->print_cr("to PTX"); |
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198 break; |
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199 case gpu::HSAIL : |
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200 tty->print_cr("to HSAIL"); |
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201 break; |
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202 default : |
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203 tty->print_cr("to Unknown GPU!!!"); |
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204 } |
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205 } |
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206 return true; |
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207 } |
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208 } |
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209 } |
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210 } |
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211 #endif |
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212 |
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213 return false; |
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214 } |
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215 |
| 1783 | 216 bool CompilationPolicy::is_compilation_enabled() { |
| 217 // NOTE: CompileBroker::should_compile_new_jobs() checks for UseCompiler | |
| 218 return !delay_compilation_during_startup() && CompileBroker::should_compile_new_jobs(); | |
| 0 | 219 } |
| 220 | |
| 221 #ifndef PRODUCT | |
| 222 void CompilationPolicy::print_time() { | |
| 223 tty->print_cr ("Accumulated compilationPolicy times:"); | |
| 224 tty->print_cr ("---------------------------"); | |
| 225 tty->print_cr (" Total: %3.3f sec.", _accumulated_time.seconds()); | |
| 226 } | |
| 227 | |
| 1783 | 228 void NonTieredCompPolicy::trace_osr_completion(nmethod* osr_nm) { |
| 0 | 229 if (TraceOnStackReplacement) { |
| 230 if (osr_nm == NULL) tty->print_cr("compilation failed"); | |
| 231 else tty->print_cr("nmethod " INTPTR_FORMAT, osr_nm); | |
| 232 } | |
| 233 } | |
| 234 #endif // !PRODUCT | |
| 235 | |
| 1783 | 236 void NonTieredCompPolicy::initialize() { |
| 237 // Setup the compiler thread numbers | |
| 238 if (CICompilerCountPerCPU) { | |
| 239 // Example: if CICompilerCountPerCPU is true, then we get | |
| 240 // max(log2(8)-1,1) = 2 compiler threads on an 8-way machine. | |
| 241 // May help big-app startup time. | |
| 242 _compiler_count = MAX2(log2_intptr(os::active_processor_count())-1,1); | |
| 243 } else { | |
| 244 _compiler_count = CICompilerCount; | |
| 245 } | |
| 246 } | |
| 247 | |
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248 // Note: this policy is used ONLY if TieredCompilation is off. |
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249 // compiler_count() behaves the following way: |
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250 // - with TIERED build (with both COMPILER1 and COMPILER2 defined) it should return |
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251 // zero for the c1 compilation levels, hence the particular ordering of the |
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252 // statements. |
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253 // - the same should happen when COMPILER2 is defined and COMPILER1 is not |
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254 // (server build without TIERED defined). |
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255 // - if only COMPILER1 is defined (client build), zero should be returned for |
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256 // the c2 level. |
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257 // - if neither is defined - always return zero. |
| 1783 | 258 int NonTieredCompPolicy::compiler_count(CompLevel comp_level) { |
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259 assert(!TieredCompilation, "This policy should not be used with TieredCompilation"); |
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260 #ifdef COMPILER2 |
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261 if (is_c2_compile(comp_level)) { |
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262 return _compiler_count; |
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263 } else { |
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264 return 0; |
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265 } |
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266 #endif |
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267 |
| 1783 | 268 #ifdef COMPILER1 |
| 269 if (is_c1_compile(comp_level)) { | |
| 270 return _compiler_count; | |
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271 } else { |
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272 return 0; |
| 1783 | 273 } |
| 274 #endif | |
| 275 | |
| 276 return 0; | |
| 277 } | |
| 278 | |
| 279 void NonTieredCompPolicy::reset_counter_for_invocation_event(methodHandle m) { | |
| 0 | 280 // Make sure invocation and backedge counter doesn't overflow again right away |
| 281 // as would be the case for native methods. | |
| 282 | |
| 283 // BUT also make sure the method doesn't look like it was never executed. | |
| 284 // Set carry bit and reduce counter's value to min(count, CompileThreshold/2). | |
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285 MethodCounters* mcs = m->method_counters(); |
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286 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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287 mcs->invocation_counter()->set_carry(); |
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288 mcs->backedge_counter()->set_carry(); |
| 0 | 289 |
| 290 assert(!m->was_never_executed(), "don't reset to 0 -- could be mistaken for never-executed"); | |
| 291 } | |
| 292 | |
| 1783 | 293 void NonTieredCompPolicy::reset_counter_for_back_branch_event(methodHandle m) { |
| 0 | 294 // Delay next back-branch event but pump up invocation counter to triger |
| 295 // whole method compilation. | |
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296 MethodCounters* mcs = m->method_counters(); |
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297 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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298 InvocationCounter* i = mcs->invocation_counter(); |
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299 InvocationCounter* b = mcs->backedge_counter(); |
| 0 | 300 |
| 301 // Don't set invocation_counter's value too low otherwise the method will | |
| 302 // look like immature (ic < ~5300) which prevents the inlining based on | |
| 303 // the type profiling. | |
| 304 i->set(i->state(), CompileThreshold); | |
| 305 // Don't reset counter too low - it is used to check if OSR method is ready. | |
| 306 b->set(b->state(), CompileThreshold / 2); | |
| 307 } | |
| 308 | |
| 1783 | 309 // |
| 310 // CounterDecay | |
| 311 // | |
| 312 // Interates through invocation counters and decrements them. This | |
| 313 // is done at each safepoint. | |
| 314 // | |
| 315 class CounterDecay : public AllStatic { | |
| 316 static jlong _last_timestamp; | |
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317 static void do_method(Method* m) { |
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318 MethodCounters* mcs = m->method_counters(); |
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319 if (mcs != NULL) { |
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320 mcs->invocation_counter()->decay(); |
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321 } |
| 1783 | 322 } |
| 323 public: | |
| 324 static void decay(); | |
| 325 static bool is_decay_needed() { | |
| 326 return (os::javaTimeMillis() - _last_timestamp) > CounterDecayMinIntervalLength; | |
| 327 } | |
| 328 }; | |
| 329 | |
| 330 jlong CounterDecay::_last_timestamp = 0; | |
| 331 | |
| 332 void CounterDecay::decay() { | |
| 333 _last_timestamp = os::javaTimeMillis(); | |
| 334 | |
| 335 // This operation is going to be performed only at the end of a safepoint | |
| 336 // and hence GC's will not be going on, all Java mutators are suspended | |
| 337 // at this point and hence SystemDictionary_lock is also not needed. | |
| 338 assert(SafepointSynchronize::is_at_safepoint(), "can only be executed at a safepoint"); | |
| 339 int nclasses = SystemDictionary::number_of_classes(); | |
| 340 double classes_per_tick = nclasses * (CounterDecayMinIntervalLength * 1e-3 / | |
| 341 CounterHalfLifeTime); | |
| 342 for (int i = 0; i < classes_per_tick; i++) { | |
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343 Klass* k = SystemDictionary::try_get_next_class(); |
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344 if (k != NULL && k->oop_is_instance()) { |
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345 InstanceKlass::cast(k)->methods_do(do_method); |
| 1783 | 346 } |
| 347 } | |
| 348 } | |
| 349 | |
| 350 // Called at the end of the safepoint | |
| 351 void NonTieredCompPolicy::do_safepoint_work() { | |
| 352 if(UseCounterDecay && CounterDecay::is_decay_needed()) { | |
| 353 CounterDecay::decay(); | |
| 354 } | |
| 355 } | |
| 356 | |
| 357 void NonTieredCompPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { | |
| 358 ScopeDesc* sd = trap_scope; | |
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359 MethodCounters* mcs; |
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360 InvocationCounter* c; |
| 1783 | 361 for (; !sd->is_top(); sd = sd->sender()) { |
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362 mcs = sd->method()->method_counters(); |
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363 if (mcs != NULL) { |
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364 // Reset ICs of inlined methods, since they can trigger compilations also. |
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365 mcs->invocation_counter()->reset(); |
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366 } |
| 1783 | 367 } |
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368 mcs = sd->method()->method_counters(); |
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369 if (mcs != NULL) { |
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370 c = mcs->invocation_counter(); |
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371 if (is_osr) { |
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372 // It was an OSR method, so bump the count higher. |
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373 c->set(c->state(), CompileThreshold); |
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374 } else { |
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375 c->reset(); |
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376 } |
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377 mcs->backedge_counter()->reset(); |
| 1783 | 378 } |
| 379 } | |
| 380 | |
| 381 // This method can be called by any component of the runtime to notify the policy | |
| 382 // that it's recommended to delay the complation of this method. | |
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383 void NonTieredCompPolicy::delay_compilation(Method* method) { |
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384 MethodCounters* mcs = method->method_counters(); |
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385 if (mcs != NULL) { |
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386 mcs->invocation_counter()->decay(); |
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387 mcs->backedge_counter()->decay(); |
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388 } |
| 1783 | 389 } |
| 390 | |
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391 void NonTieredCompPolicy::disable_compilation(Method* method) { |
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392 MethodCounters* mcs = method->method_counters(); |
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393 if (mcs != NULL) { |
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394 mcs->invocation_counter()->set_state(InvocationCounter::wait_for_nothing); |
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395 mcs->backedge_counter()->set_state(InvocationCounter::wait_for_nothing); |
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396 } |
| 1783 | 397 } |
| 398 | |
| 399 CompileTask* NonTieredCompPolicy::select_task(CompileQueue* compile_queue) { | |
| 400 return compile_queue->first(); | |
| 401 } | |
| 402 | |
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403 bool NonTieredCompPolicy::is_mature(Method* method) { |
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404 MethodData* mdo = method->method_data(); |
| 1783 | 405 assert(mdo != NULL, "Should be"); |
| 406 uint current = mdo->mileage_of(method); | |
| 407 uint initial = mdo->creation_mileage(); | |
| 408 if (current < initial) | |
| 409 return true; // some sort of overflow | |
| 410 uint target; | |
| 411 if (ProfileMaturityPercentage <= 0) | |
| 412 target = (uint) -ProfileMaturityPercentage; // absolute value | |
| 413 else | |
| 414 target = (uint)( (ProfileMaturityPercentage * CompileThreshold) / 100 ); | |
| 415 return (current >= initial + target); | |
| 416 } | |
| 417 | |
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418 nmethod* NonTieredCompPolicy::event(methodHandle method, methodHandle inlinee, int branch_bci, |
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419 int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) { |
| 1783 | 420 assert(comp_level == CompLevel_none, "This should be only called from the interpreter"); |
| 421 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci)); | |
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422 if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) { |
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423 // If certain JVMTI events (e.g. frame pop event) are requested then the |
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424 // thread is forced to remain in interpreted code. This is |
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425 // implemented partly by a check in the run_compiled_code |
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426 // section of the interpreter whether we should skip running |
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427 // compiled code, and partly by skipping OSR compiles for |
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428 // interpreted-only threads. |
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429 if (bci != InvocationEntryBci) { |
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430 reset_counter_for_back_branch_event(method); |
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431 return NULL; |
| 1783 | 432 } |
| 433 } | |
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434 if (CompileTheWorld || ReplayCompiles) { |
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435 // Don't trigger other compiles in testing mode |
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436 if (bci == InvocationEntryBci) { |
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437 reset_counter_for_invocation_event(method); |
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438 } else { |
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439 reset_counter_for_back_branch_event(method); |
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440 } |
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441 return NULL; |
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442 } |
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443 |
| 1783 | 444 if (bci == InvocationEntryBci) { |
| 445 // when code cache is full, compilation gets switched off, UseCompiler | |
| 446 // is set to false | |
| 447 if (!method->has_compiled_code() && UseCompiler) { | |
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448 method_invocation_event(method, thread); |
| 1783 | 449 } else { |
| 450 // Force counter overflow on method entry, even if no compilation | |
| 451 // happened. (The method_invocation_event call does this also.) | |
| 452 reset_counter_for_invocation_event(method); | |
| 453 } | |
| 454 // compilation at an invocation overflow no longer goes and retries test for | |
| 455 // compiled method. We always run the loser of the race as interpreted. | |
| 456 // so return NULL | |
| 457 return NULL; | |
| 458 } else { | |
| 459 // counter overflow in a loop => try to do on-stack-replacement | |
| 460 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci, CompLevel_highest_tier, true); | |
| 461 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci)); | |
| 462 // when code cache is full, we should not compile any more... | |
| 463 if (osr_nm == NULL && UseCompiler) { | |
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464 method_back_branch_event(method, bci, thread); |
| 1783 | 465 osr_nm = method->lookup_osr_nmethod_for(bci, CompLevel_highest_tier, true); |
| 466 } | |
| 467 if (osr_nm == NULL) { | |
| 468 reset_counter_for_back_branch_event(method); | |
| 469 return NULL; | |
| 470 } | |
| 471 return osr_nm; | |
| 472 } | |
| 473 return NULL; | |
| 474 } | |
| 475 | |
| 476 #ifndef PRODUCT | |
| 477 void NonTieredCompPolicy::trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci) { | |
| 478 if (TraceInvocationCounterOverflow) { | |
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479 MethodCounters* mcs = m->method_counters(); |
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480 assert(mcs != NULL, "MethodCounters cannot be NULL for profiling"); |
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481 InvocationCounter* ic = mcs->invocation_counter(); |
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482 InvocationCounter* bc = mcs->backedge_counter(); |
| 1783 | 483 ResourceMark rm; |
| 484 const char* msg = | |
| 485 bci == InvocationEntryBci | |
| 486 ? "comp-policy cntr ovfl @ %d in entry of " | |
| 487 : "comp-policy cntr ovfl @ %d in loop of "; | |
| 488 tty->print(msg, bci); | |
| 489 m->print_value(); | |
| 490 tty->cr(); | |
| 491 ic->print(); | |
| 492 bc->print(); | |
| 493 if (ProfileInterpreter) { | |
| 494 if (bci != InvocationEntryBci) { | |
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495 MethodData* mdo = m->method_data(); |
| 1783 | 496 if (mdo != NULL) { |
| 497 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); | |
| 498 tty->print_cr("back branch count = %d", count); | |
| 499 } | |
| 500 } | |
| 501 } | |
| 502 } | |
| 503 } | |
| 504 | |
| 505 void NonTieredCompPolicy::trace_osr_request(methodHandle method, nmethod* osr, int bci) { | |
| 506 if (TraceOnStackReplacement) { | |
| 507 ResourceMark rm; | |
| 508 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); | |
| 509 method->print_short_name(tty); | |
| 510 tty->print_cr(" at bci %d", bci); | |
| 511 } | |
| 512 } | |
| 513 #endif // !PRODUCT | |
| 514 | |
| 0 | 515 // SimpleCompPolicy - compile current method |
| 516 | |
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517 void SimpleCompPolicy::method_invocation_event(methodHandle m, JavaThread* thread) { |
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518 const int comp_level = CompLevel_highest_tier; |
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519 const int hot_count = m->invocation_count(); |
| 0 | 520 reset_counter_for_invocation_event(m); |
| 521 const char* comment = "count"; | |
| 522 | |
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523 if (is_compilation_enabled() && can_be_compiled(m, comp_level)) { |
| 0 | 524 nmethod* nm = m->code(); |
| 525 if (nm == NULL ) { | |
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526 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, m, hot_count, comment, thread); |
| 0 | 527 } |
| 528 } | |
| 529 } | |
| 530 | |
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531 void SimpleCompPolicy::method_back_branch_event(methodHandle m, int bci, JavaThread* thread) { |
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532 const int comp_level = CompLevel_highest_tier; |
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533 const int hot_count = m->backedge_count(); |
| 0 | 534 const char* comment = "backedge_count"; |
| 535 | |
| 12073 | 536 if (is_compilation_enabled() && can_be_osr_compiled(m, comp_level)) { |
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537 CompileBroker::compile_method(m, bci, comp_level, m, hot_count, comment, thread); |
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538 NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(bci, comp_level, true));) |
| 0 | 539 } |
| 540 } | |
| 541 // StackWalkCompPolicy - walk up stack to find a suitable method to compile | |
| 542 | |
| 543 #ifdef COMPILER2 | |
| 544 const char* StackWalkCompPolicy::_msg = NULL; | |
| 545 | |
| 546 | |
| 547 // Consider m for compilation | |
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548 void StackWalkCompPolicy::method_invocation_event(methodHandle m, JavaThread* thread) { |
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549 const int comp_level = CompLevel_highest_tier; |
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550 const int hot_count = m->invocation_count(); |
| 0 | 551 reset_counter_for_invocation_event(m); |
| 552 const char* comment = "count"; | |
| 553 | |
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554 if (is_compilation_enabled() && m->code() == NULL && can_be_compiled(m, comp_level)) { |
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555 ResourceMark rm(thread); |
| 0 | 556 frame fr = thread->last_frame(); |
| 557 assert(fr.is_interpreted_frame(), "must be interpreted"); | |
| 558 assert(fr.interpreter_frame_method() == m(), "bad method"); | |
| 559 | |
| 560 if (TraceCompilationPolicy) { | |
| 561 tty->print("method invocation trigger: "); | |
| 562 m->print_short_name(tty); | |
| 563 tty->print(" ( interpreted " INTPTR_FORMAT ", size=%d ) ", (address)m(), m->code_size()); | |
| 564 } | |
| 565 RegisterMap reg_map(thread, false); | |
| 566 javaVFrame* triggerVF = thread->last_java_vframe(®_map); | |
| 567 // triggerVF is the frame that triggered its counter | |
| 568 RFrame* first = new InterpretedRFrame(triggerVF->fr(), thread, m); | |
| 569 | |
| 570 if (first->top_method()->code() != NULL) { | |
| 571 // called obsolete method/nmethod -- no need to recompile | |
| 572 if (TraceCompilationPolicy) tty->print_cr(" --> " INTPTR_FORMAT, first->top_method()->code()); | |
| 573 } else { | |
| 574 if (TimeCompilationPolicy) accumulated_time()->start(); | |
| 575 GrowableArray<RFrame*>* stack = new GrowableArray<RFrame*>(50); | |
| 576 stack->push(first); | |
| 577 RFrame* top = findTopInlinableFrame(stack); | |
| 578 if (TimeCompilationPolicy) accumulated_time()->stop(); | |
| 579 assert(top != NULL, "findTopInlinableFrame returned null"); | |
| 580 if (TraceCompilationPolicy) top->print(); | |
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581 CompileBroker::compile_method(top->top_method(), InvocationEntryBci, comp_level, |
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582 m, hot_count, comment, thread); |
| 0 | 583 } |
| 584 } | |
| 585 } | |
| 586 | |
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587 void StackWalkCompPolicy::method_back_branch_event(methodHandle m, int bci, JavaThread* thread) { |
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588 const int comp_level = CompLevel_highest_tier; |
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589 const int hot_count = m->backedge_count(); |
| 0 | 590 const char* comment = "backedge_count"; |
| 591 | |
| 12073 | 592 if (is_compilation_enabled() && can_be_osr_compiled(m, comp_level)) { |
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593 CompileBroker::compile_method(m, bci, comp_level, m, hot_count, comment, thread); |
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594 NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(bci, comp_level, true));) |
| 0 | 595 } |
| 596 } | |
| 597 | |
| 598 RFrame* StackWalkCompPolicy::findTopInlinableFrame(GrowableArray<RFrame*>* stack) { | |
| 599 // go up the stack until finding a frame that (probably) won't be inlined | |
| 600 // into its caller | |
| 601 RFrame* current = stack->at(0); // current choice for stopping | |
| 602 assert( current && !current->is_compiled(), "" ); | |
| 603 const char* msg = NULL; | |
| 604 | |
| 605 while (1) { | |
| 606 | |
| 607 // before going up the stack further, check if doing so would get us into | |
| 608 // compiled code | |
| 609 RFrame* next = senderOf(current, stack); | |
| 610 if( !next ) // No next frame up the stack? | |
| 611 break; // Then compile with current frame | |
| 612 | |
| 613 methodHandle m = current->top_method(); | |
| 614 methodHandle next_m = next->top_method(); | |
| 615 | |
| 616 if (TraceCompilationPolicy && Verbose) { | |
| 617 tty->print("[caller: "); | |
| 618 next_m->print_short_name(tty); | |
| 619 tty->print("] "); | |
| 620 } | |
| 621 | |
| 622 if( !Inline ) { // Inlining turned off | |
| 623 msg = "Inlining turned off"; | |
| 624 break; | |
| 625 } | |
| 626 if (next_m->is_not_compilable()) { // Did fail to compile this before/ | |
| 627 msg = "caller not compilable"; | |
| 628 break; | |
| 629 } | |
| 630 if (next->num() > MaxRecompilationSearchLength) { | |
| 631 // don't go up too high when searching for recompilees | |
| 632 msg = "don't go up any further: > MaxRecompilationSearchLength"; | |
| 633 break; | |
| 634 } | |
| 635 if (next->distance() > MaxInterpretedSearchLength) { | |
| 636 // don't go up too high when searching for recompilees | |
| 637 msg = "don't go up any further: next > MaxInterpretedSearchLength"; | |
| 638 break; | |
| 639 } | |
| 640 // Compiled frame above already decided not to inline; | |
| 641 // do not recompile him. | |
| 642 if (next->is_compiled()) { | |
| 643 msg = "not going up into optimized code"; | |
| 644 break; | |
| 645 } | |
| 646 | |
| 647 // Interpreted frame above us was already compiled. Do not force | |
| 648 // a recompile, although if the frame above us runs long enough an | |
| 649 // OSR might still happen. | |
| 650 if( current->is_interpreted() && next_m->has_compiled_code() ) { | |
| 651 msg = "not going up -- already compiled caller"; | |
| 652 break; | |
| 653 } | |
| 654 | |
| 655 // Compute how frequent this call site is. We have current method 'm'. | |
| 656 // We know next method 'next_m' is interpreted. Find the call site and | |
| 657 // check the various invocation counts. | |
| 658 int invcnt = 0; // Caller counts | |
| 659 if (ProfileInterpreter) { | |
| 660 invcnt = next_m->interpreter_invocation_count(); | |
| 661 } | |
| 662 int cnt = 0; // Call site counts | |
| 663 if (ProfileInterpreter && next_m->method_data() != NULL) { | |
| 664 ResourceMark rm; | |
| 665 int bci = next->top_vframe()->bci(); | |
| 666 ProfileData* data = next_m->method_data()->bci_to_data(bci); | |
| 667 if (data != NULL && data->is_CounterData()) | |
| 668 cnt = data->as_CounterData()->count(); | |
| 669 } | |
| 670 | |
| 671 // Caller counts / call-site counts; i.e. is this call site | |
| 672 // a hot call site for method next_m? | |
| 673 int freq = (invcnt) ? cnt/invcnt : cnt; | |
| 674 | |
| 675 // Check size and frequency limits | |
| 676 if ((msg = shouldInline(m, freq, cnt)) != NULL) { | |
| 677 break; | |
| 678 } | |
| 679 // Check inlining negative tests | |
| 680 if ((msg = shouldNotInline(m)) != NULL) { | |
| 681 break; | |
| 682 } | |
| 683 | |
| 684 | |
| 685 // If the caller method is too big or something then we do not want to | |
| 686 // compile it just to inline a method | |
|
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687 if (!can_be_compiled(next_m, CompLevel_any)) { |
| 0 | 688 msg = "caller cannot be compiled"; |
| 689 break; | |
| 690 } | |
| 691 | |
| 692 if( next_m->name() == vmSymbols::class_initializer_name() ) { | |
| 693 msg = "do not compile class initializer (OSR ok)"; | |
| 694 break; | |
| 695 } | |
| 696 | |
| 697 if (TraceCompilationPolicy && Verbose) { | |
| 698 tty->print("\n\t check caller: "); | |
| 699 next_m->print_short_name(tty); | |
| 700 tty->print(" ( interpreted " INTPTR_FORMAT ", size=%d ) ", (address)next_m(), next_m->code_size()); | |
| 701 } | |
| 702 | |
| 703 current = next; | |
| 704 } | |
| 705 | |
| 706 assert( !current || !current->is_compiled(), "" ); | |
| 707 | |
| 708 if (TraceCompilationPolicy && msg) tty->print("(%s)\n", msg); | |
| 709 | |
| 710 return current; | |
| 711 } | |
| 712 | |
| 713 RFrame* StackWalkCompPolicy::senderOf(RFrame* rf, GrowableArray<RFrame*>* stack) { | |
| 714 RFrame* sender = rf->caller(); | |
| 715 if (sender && sender->num() == stack->length()) stack->push(sender); | |
| 716 return sender; | |
| 717 } | |
| 718 | |
| 719 | |
| 720 const char* StackWalkCompPolicy::shouldInline(methodHandle m, float freq, int cnt) { | |
| 721 // Allows targeted inlining | |
| 722 // positive filter: should send be inlined? returns NULL (--> yes) | |
| 723 // or rejection msg | |
| 724 int max_size = MaxInlineSize; | |
| 725 int cost = m->code_size(); | |
| 726 | |
| 727 // Check for too many throws (and not too huge) | |
| 728 if (m->interpreter_throwout_count() > InlineThrowCount && cost < InlineThrowMaxSize ) { | |
| 729 return NULL; | |
| 730 } | |
| 731 | |
| 732 // bump the max size if the call is frequent | |
| 733 if ((freq >= InlineFrequencyRatio) || (cnt >= InlineFrequencyCount)) { | |
| 734 if (TraceFrequencyInlining) { | |
| 735 tty->print("(Inlined frequent method)\n"); | |
| 736 m->print(); | |
| 737 } | |
| 738 max_size = FreqInlineSize; | |
| 739 } | |
| 740 if (cost > max_size) { | |
| 741 return (_msg = "too big"); | |
| 742 } | |
| 743 return NULL; | |
| 744 } | |
| 745 | |
| 746 | |
| 747 const char* StackWalkCompPolicy::shouldNotInline(methodHandle m) { | |
| 748 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg | |
| 749 if (m->is_abstract()) return (_msg = "abstract method"); | |
| 750 // note: we allow ik->is_abstract() | |
|
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751 if (!m->method_holder()->is_initialized()) return (_msg = "method holder not initialized"); |
| 0 | 752 if (m->is_native()) return (_msg = "native method"); |
| 753 nmethod* m_code = m->code(); | |
| 1748 | 754 if (m_code != NULL && m_code->code_size() > InlineSmallCode) |
| 0 | 755 return (_msg = "already compiled into a big method"); |
| 756 | |
| 757 // use frequency-based objections only for non-trivial methods | |
| 758 if (m->code_size() <= MaxTrivialSize) return NULL; | |
| 759 if (UseInterpreter) { // don't use counts with -Xcomp | |
| 760 if ((m->code() == NULL) && m->was_never_executed()) return (_msg = "never executed"); | |
| 761 if (!m->was_executed_more_than(MIN2(MinInliningThreshold, CompileThreshold >> 1))) return (_msg = "executed < MinInliningThreshold times"); | |
| 762 } | |
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763 if (Method::has_unloaded_classes_in_signature(m, JavaThread::current())) return (_msg = "unloaded signature classes"); |
| 0 | 764 |
| 765 return NULL; | |
| 766 } | |
| 767 | |
| 768 | |
| 769 | |
| 770 #endif // COMPILER2 |