Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/advancedThresholdPolicy.cpp @ 23379:24505bf61633
allow JVMCI compiler to change the compilation policy for a method (JDK-8152311)
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Mon, 09 May 2016 16:08:16 +0200 |
| parents | 9d78d44d3aac |
| children | 3ef45d0a6d77 |
| rev | line source |
|---|---|
| 2348 | 1 /* |
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2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| 3358 | 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 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 2348 | 24 |
| 25 #include "precompiled.hpp" | |
| 26 #include "runtime/advancedThresholdPolicy.hpp" | |
| 27 #include "runtime/simpleThresholdPolicy.inline.hpp" | |
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28 #ifdef COMPILERJVMCI |
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29 #include "jvmci/jvmciRuntime.hpp" |
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30 #endif |
| 2348 | 31 |
| 32 #ifdef TIERED | |
| 33 // Print an event. | |
| 34 void AdvancedThresholdPolicy::print_specific(EventType type, methodHandle mh, methodHandle imh, | |
| 35 int bci, CompLevel level) { | |
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36 tty->print(" rate="); |
| 2348 | 37 if (mh->prev_time() == 0) tty->print("n/a"); |
| 38 else tty->print("%f", mh->rate()); | |
| 39 | |
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40 tty->print(" k=%.2lf,%.2lf", threshold_scale(CompLevel_full_profile, Tier3LoadFeedback), |
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41 threshold_scale(CompLevel_full_optimization, Tier4LoadFeedback)); |
| 2348 | 42 |
| 43 } | |
| 44 | |
| 45 void AdvancedThresholdPolicy::initialize() { | |
| 46 // Turn on ergonomic compiler count selection | |
| 47 if (FLAG_IS_DEFAULT(CICompilerCountPerCPU) && FLAG_IS_DEFAULT(CICompilerCount)) { | |
| 48 FLAG_SET_DEFAULT(CICompilerCountPerCPU, true); | |
| 49 } | |
| 50 int count = CICompilerCount; | |
| 51 if (CICompilerCountPerCPU) { | |
| 52 // Simple log n seems to grow too slowly for tiered, try something faster: log n * log log n | |
| 53 int log_cpu = log2_intptr(os::active_processor_count()); | |
| 54 int loglog_cpu = log2_intptr(MAX2(log_cpu, 1)); | |
| 55 count = MAX2(log_cpu * loglog_cpu, 1) * 3 / 2; | |
| 56 } | |
| 57 | |
| 58 set_c1_count(MAX2(count / 3, 1)); | |
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59 set_c2_count(MAX2(count - c1_count(), 1)); |
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60 FLAG_SET_ERGO(intx, CICompilerCount, c1_count() + c2_count()); |
| 2348 | 61 |
| 62 // Some inlining tuning | |
| 63 #ifdef X86 | |
| 64 if (FLAG_IS_DEFAULT(InlineSmallCode)) { | |
| 65 FLAG_SET_DEFAULT(InlineSmallCode, 2000); | |
| 66 } | |
| 67 #endif | |
| 68 | |
| 69 #ifdef SPARC | |
| 70 if (FLAG_IS_DEFAULT(InlineSmallCode)) { | |
| 71 FLAG_SET_DEFAULT(InlineSmallCode, 2500); | |
| 72 } | |
| 73 #endif | |
| 74 | |
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75 set_increase_threshold_at_ratio(); |
| 2348 | 76 set_start_time(os::javaTimeMillis()); |
| 77 } | |
| 78 | |
| 79 // update_rate() is called from select_task() while holding a compile queue lock. | |
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80 void AdvancedThresholdPolicy::update_rate(jlong t, Method* m) { |
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81 // Skip update if counters are absent. |
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82 // Can't allocate them since we are holding compile queue lock. |
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83 if (m->method_counters() == NULL) return; |
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84 |
| 2348 | 85 if (is_old(m)) { |
| 86 // We don't remove old methods from the queue, | |
| 87 // so we can just zero the rate. | |
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88 m->set_rate(0); |
| 2348 | 89 return; |
| 90 } | |
| 91 | |
| 92 // We don't update the rate if we've just came out of a safepoint. | |
| 93 // delta_s is the time since last safepoint in milliseconds. | |
| 94 jlong delta_s = t - SafepointSynchronize::end_of_last_safepoint(); | |
| 95 jlong delta_t = t - (m->prev_time() != 0 ? m->prev_time() : start_time()); // milliseconds since the last measurement | |
| 96 // How many events were there since the last time? | |
| 97 int event_count = m->invocation_count() + m->backedge_count(); | |
| 98 int delta_e = event_count - m->prev_event_count(); | |
| 99 | |
| 100 // We should be running for at least 1ms. | |
| 101 if (delta_s >= TieredRateUpdateMinTime) { | |
| 102 // And we must've taken the previous point at least 1ms before. | |
| 103 if (delta_t >= TieredRateUpdateMinTime && delta_e > 0) { | |
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104 m->set_prev_time(t); |
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105 m->set_prev_event_count(event_count); |
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106 m->set_rate((float)delta_e / (float)delta_t); // Rate is events per millisecond |
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107 } else { |
| 2348 | 108 if (delta_t > TieredRateUpdateMaxTime && delta_e == 0) { |
| 109 // If nothing happened for 25ms, zero the rate. Don't modify prev values. | |
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110 m->set_rate(0); |
| 2348 | 111 } |
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112 } |
| 2348 | 113 } |
| 114 } | |
| 115 | |
| 116 // Check if this method has been stale from a given number of milliseconds. | |
| 117 // See select_task(). | |
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118 bool AdvancedThresholdPolicy::is_stale(jlong t, jlong timeout, Method* m) { |
| 2348 | 119 jlong delta_s = t - SafepointSynchronize::end_of_last_safepoint(); |
| 120 jlong delta_t = t - m->prev_time(); | |
| 121 if (delta_t > timeout && delta_s > timeout) { | |
| 122 int event_count = m->invocation_count() + m->backedge_count(); | |
| 123 int delta_e = event_count - m->prev_event_count(); | |
| 124 // Return true if there were no events. | |
| 125 return delta_e == 0; | |
| 126 } | |
| 127 return false; | |
| 128 } | |
| 129 | |
| 130 // We don't remove old methods from the compile queue even if they have | |
| 131 // very low activity. See select_task(). | |
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132 bool AdvancedThresholdPolicy::is_old(Method* method) { |
| 2348 | 133 return method->invocation_count() > 50000 || method->backedge_count() > 500000; |
| 134 } | |
| 135 | |
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136 double AdvancedThresholdPolicy::weight(Method* method) { |
| 2348 | 137 return (method->rate() + 1) * ((method->invocation_count() + 1) * (method->backedge_count() + 1)); |
| 138 } | |
| 139 | |
| 140 // Apply heuristics and return true if x should be compiled before y | |
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141 bool AdvancedThresholdPolicy::compare_methods(Method* x, Method* y) { |
| 2348 | 142 if (x->highest_comp_level() > y->highest_comp_level()) { |
| 143 // recompilation after deopt | |
| 144 return true; | |
| 145 } else | |
| 146 if (x->highest_comp_level() == y->highest_comp_level()) { | |
| 147 if (weight(x) > weight(y)) { | |
| 148 return true; | |
| 149 } | |
| 150 } | |
| 151 return false; | |
| 152 } | |
| 153 | |
| 154 // Is method profiled enough? | |
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155 bool AdvancedThresholdPolicy::is_method_profiled(Method* method) { |
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156 MethodData* mdo = method->method_data(); |
| 2348 | 157 if (mdo != NULL) { |
| 158 int i = mdo->invocation_count_delta(); | |
| 159 int b = mdo->backedge_count_delta(); | |
| 160 return call_predicate_helper<CompLevel_full_profile>(i, b, 1); | |
| 161 } | |
| 162 return false; | |
| 163 } | |
| 164 | |
| 165 // Called with the queue locked and with at least one element | |
| 166 CompileTask* AdvancedThresholdPolicy::select_task(CompileQueue* compile_queue) { | |
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167 #ifdef COMPILERJVMCI |
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168 CompileTask *max_blocking_task = NULL; |
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169 #endif |
| 2348 | 170 CompileTask *max_task = NULL; |
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171 Method* max_method = NULL; |
| 2348 | 172 jlong t = os::javaTimeMillis(); |
| 173 // Iterate through the queue and find a method with a maximum rate. | |
| 174 for (CompileTask* task = compile_queue->first(); task != NULL;) { | |
| 175 CompileTask* next_task = task->next(); | |
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176 Method* method = task->method(); |
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177 update_rate(t, method); |
| 2348 | 178 if (max_task == NULL) { |
| 179 max_task = task; | |
| 180 max_method = method; | |
| 181 } else { | |
| 182 // If a method has been stale for some time, remove it from the queue. | |
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183 if (is_stale(t, TieredCompileTaskTimeout, method) && !is_old(method)) { |
| 2348 | 184 if (PrintTieredEvents) { |
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185 print_event(REMOVE_FROM_QUEUE, method, method, task->osr_bci(), (CompLevel)task->comp_level()); |
| 2348 | 186 } |
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187 task->log_task_dequeued("stale"); |
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188 compile_queue->remove_and_mark_stale(task); |
| 2348 | 189 method->clear_queued_for_compilation(); |
| 190 task = next_task; | |
| 191 continue; | |
| 192 } | |
| 193 | |
| 194 // Select a method with a higher rate | |
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195 if (compare_methods(method, max_method)) { |
| 2348 | 196 max_task = task; |
| 197 max_method = method; | |
| 198 } | |
| 199 } | |
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200 #ifdef COMPILERJVMCI |
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201 if (task->is_blocking()) { |
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202 if (max_blocking_task == NULL || compare_methods(method, max_blocking_task->method())) { |
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203 max_blocking_task = task; |
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204 } |
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205 } |
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206 #endif |
| 2348 | 207 task = next_task; |
| 208 } | |
| 209 | |
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210 #ifdef COMPILERJVMCI |
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211 if (max_blocking_task != NULL) { |
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212 // In blocking compilation mode, the CompileBroker will make |
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213 // compilations submitted by a JVMCI compiler thread non-blocking. These |
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214 // compilations should be scheduled after all blocking compilations |
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215 // to service non-compiler related compilations sooner and reduce the |
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216 // chance of such compilations timing out. |
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217 max_task = max_blocking_task; |
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218 max_method = max_task->method(); |
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219 } |
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220 #endif |
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221 |
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222 if (max_task->comp_level() == CompLevel_full_profile && TieredStopAtLevel > CompLevel_full_profile |
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223 && is_method_profiled(max_method)) { |
| 2348 | 224 max_task->set_comp_level(CompLevel_limited_profile); |
| 225 if (PrintTieredEvents) { | |
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226 print_event(UPDATE_IN_QUEUE, max_method, max_method, max_task->osr_bci(), (CompLevel)max_task->comp_level()); |
| 2348 | 227 } |
| 228 } | |
| 229 | |
| 230 return max_task; | |
| 231 } | |
| 232 | |
| 233 double AdvancedThresholdPolicy::threshold_scale(CompLevel level, int feedback_k) { | |
| 234 double queue_size = CompileBroker::queue_size(level); | |
| 235 int comp_count = compiler_count(level); | |
| 236 double k = queue_size / (feedback_k * comp_count) + 1; | |
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237 |
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238 // Increase C1 compile threshold when the code cache is filled more |
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239 // than specified by IncreaseFirstTierCompileThresholdAt percentage. |
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240 // The main intention is to keep enough free space for C2 compiled code |
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241 // to achieve peak performance if the code cache is under stress. |
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242 if ((TieredStopAtLevel == CompLevel_full_optimization) && (level != CompLevel_full_optimization)) { |
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243 double current_reverse_free_ratio = CodeCache::reverse_free_ratio(); |
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244 if (current_reverse_free_ratio > _increase_threshold_at_ratio) { |
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245 k *= exp(current_reverse_free_ratio - _increase_threshold_at_ratio); |
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246 } |
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247 } |
| 2348 | 248 return k; |
| 249 } | |
| 250 | |
| 251 // Call and loop predicates determine whether a transition to a higher | |
| 252 // compilation level should be performed (pointers to predicate functions | |
| 253 // are passed to common()). | |
| 254 // Tier?LoadFeedback is basically a coefficient that determines of | |
| 255 // how many methods per compiler thread can be in the queue before | |
| 256 // the threshold values double. | |
| 257 bool AdvancedThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) { | |
| 258 switch(cur_level) { | |
| 259 case CompLevel_none: | |
| 260 case CompLevel_limited_profile: { | |
| 261 double k = threshold_scale(CompLevel_full_profile, Tier3LoadFeedback); | |
| 262 return loop_predicate_helper<CompLevel_none>(i, b, k); | |
| 263 } | |
| 264 case CompLevel_full_profile: { | |
| 265 double k = threshold_scale(CompLevel_full_optimization, Tier4LoadFeedback); | |
| 266 return loop_predicate_helper<CompLevel_full_profile>(i, b, k); | |
| 267 } | |
| 268 default: | |
| 269 return true; | |
| 270 } | |
| 271 } | |
| 272 | |
| 273 bool AdvancedThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) { | |
| 274 switch(cur_level) { | |
| 275 case CompLevel_none: | |
| 276 case CompLevel_limited_profile: { | |
| 277 double k = threshold_scale(CompLevel_full_profile, Tier3LoadFeedback); | |
| 278 return call_predicate_helper<CompLevel_none>(i, b, k); | |
| 279 } | |
| 280 case CompLevel_full_profile: { | |
| 281 double k = threshold_scale(CompLevel_full_optimization, Tier4LoadFeedback); | |
| 282 return call_predicate_helper<CompLevel_full_profile>(i, b, k); | |
| 283 } | |
| 284 default: | |
| 285 return true; | |
| 286 } | |
| 287 } | |
| 288 | |
| 289 // If a method is old enough and is still in the interpreter we would want to | |
| 290 // start profiling without waiting for the compiled method to arrive. | |
| 291 // We also take the load on compilers into the account. | |
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292 bool AdvancedThresholdPolicy::should_create_mdo(Method* method, CompLevel cur_level) { |
| 2348 | 293 if (cur_level == CompLevel_none && |
| 294 CompileBroker::queue_size(CompLevel_full_optimization) <= | |
| 295 Tier3DelayOn * compiler_count(CompLevel_full_optimization)) { | |
| 296 int i = method->invocation_count(); | |
| 297 int b = method->backedge_count(); | |
| 298 double k = Tier0ProfilingStartPercentage / 100.0; | |
| 299 return call_predicate_helper<CompLevel_none>(i, b, k) || loop_predicate_helper<CompLevel_none>(i, b, k); | |
| 300 } | |
| 301 return false; | |
| 302 } | |
| 303 | |
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304 // Inlining control: if we're compiling a profiled method with C1 and the callee |
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305 // is known to have OSRed in a C2 version, don't inline it. |
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306 bool AdvancedThresholdPolicy::should_not_inline(ciEnv* env, ciMethod* callee) { |
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307 CompLevel comp_level = (CompLevel)env->comp_level(); |
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308 if (comp_level == CompLevel_full_profile || |
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309 comp_level == CompLevel_limited_profile) { |
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310 return callee->highest_osr_comp_level() == CompLevel_full_optimization; |
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311 } |
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312 return false; |
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313 } |
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314 |
| 2348 | 315 // Create MDO if necessary. |
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316 void AdvancedThresholdPolicy::create_mdo(methodHandle mh, JavaThread* THREAD) { |
| 2348 | 317 if (mh->is_native() || mh->is_abstract() || mh->is_accessor()) return; |
| 318 if (mh->method_data() == NULL) { | |
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319 Method::build_interpreter_method_data(mh, CHECK_AND_CLEAR); |
| 2348 | 320 } |
| 321 } | |
| 322 | |
| 323 | |
| 324 /* | |
| 325 * Method states: | |
| 326 * 0 - interpreter (CompLevel_none) | |
| 327 * 1 - pure C1 (CompLevel_simple) | |
| 328 * 2 - C1 with invocation and backedge counting (CompLevel_limited_profile) | |
| 329 * 3 - C1 with full profiling (CompLevel_full_profile) | |
| 330 * 4 - C2 (CompLevel_full_optimization) | |
| 331 * | |
| 332 * Common state transition patterns: | |
| 333 * a. 0 -> 3 -> 4. | |
| 334 * The most common path. But note that even in this straightforward case | |
| 335 * profiling can start at level 0 and finish at level 3. | |
| 336 * | |
| 337 * b. 0 -> 2 -> 3 -> 4. | |
| 338 * This case occures when the load on C2 is deemed too high. So, instead of transitioning | |
| 339 * into state 3 directly and over-profiling while a method is in the C2 queue we transition to | |
| 340 * level 2 and wait until the load on C2 decreases. This path is disabled for OSRs. | |
| 341 * | |
| 342 * c. 0 -> (3->2) -> 4. | |
| 343 * In this case we enqueue a method for compilation at level 3, but the C1 queue is long enough | |
| 344 * to enable the profiling to fully occur at level 0. In this case we change the compilation level | |
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345 * of the method to 2 while the request is still in-queue, because it'll allow it to run much faster |
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346 * without full profiling while c2 is compiling. |
| 2348 | 347 * |
| 348 * d. 0 -> 3 -> 1 or 0 -> 2 -> 1. | |
| 349 * After a method was once compiled with C1 it can be identified as trivial and be compiled to | |
| 350 * level 1. These transition can also occur if a method can't be compiled with C2 but can with C1. | |
| 351 * | |
| 352 * e. 0 -> 4. | |
| 353 * This can happen if a method fails C1 compilation (it will still be profiled in the interpreter) | |
| 354 * or because of a deopt that didn't require reprofiling (compilation won't happen in this case because | |
| 355 * the compiled version already exists). | |
| 356 * | |
| 357 * Note that since state 0 can be reached from any other state via deoptimization different loops | |
| 358 * are possible. | |
| 359 * | |
| 360 */ | |
| 361 | |
| 362 // Common transition function. Given a predicate determines if a method should transition to another level. | |
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363 CompLevel AdvancedThresholdPolicy::common(Predicate p, Method* method, CompLevel cur_level, bool disable_feedback) { |
| 2348 | 364 CompLevel next_level = cur_level; |
| 365 int i = method->invocation_count(); | |
| 366 int b = method->backedge_count(); | |
| 367 | |
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368 if (is_trivial(method)) { |
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369 next_level = CompLevel_simple; |
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370 } else { |
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371 switch(cur_level) { |
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372 case CompLevel_none: |
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373 // If we were at full profile level, would we switch to full opt? |
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374 if (common(p, method, CompLevel_full_profile, disable_feedback) == CompLevel_full_optimization) { |
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375 next_level = CompLevel_full_optimization; |
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376 } else if ((this->*p)(i, b, cur_level)) { |
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377 #ifdef COMPILERJVMCI |
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378 // Since JVMCI takes a while to warm up, its queue inevitably backs up during |
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379 // early VM execution. |
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380 next_level = CompLevel_full_profile; |
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381 #else |
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382 // C1-generated fully profiled code is about 30% slower than the limited profile |
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383 // code that has only invocation and backedge counters. The observation is that |
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384 // if C2 queue is large enough we can spend too much time in the fully profiled code |
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385 // while waiting for C2 to pick the method from the queue. To alleviate this problem |
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386 // we introduce a feedback on the C2 queue size. If the C2 queue is sufficiently long |
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387 // we choose to compile a limited profiled version and then recompile with full profiling |
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388 // when the load on C2 goes down. |
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389 if (!disable_feedback && CompileBroker::queue_size(CompLevel_full_optimization) > |
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390 Tier3DelayOn * compiler_count(CompLevel_full_optimization)) { |
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391 next_level = CompLevel_limited_profile; |
| 2348 | 392 } else { |
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393 next_level = CompLevel_full_profile; |
| 2348 | 394 } |
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395 #endif |
| 2348 | 396 } |
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397 break; |
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398 case CompLevel_limited_profile: |
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399 if (is_method_profiled(method)) { |
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400 // Special case: we got here because this method was fully profiled in the interpreter. |
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401 next_level = CompLevel_full_optimization; |
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402 } else { |
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403 MethodData* mdo = method->method_data(); |
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404 if (mdo != NULL) { |
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405 if (mdo->would_profile()) { |
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406 if (disable_feedback || (CompileBroker::queue_size(CompLevel_full_optimization) <= |
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407 Tier3DelayOff * compiler_count(CompLevel_full_optimization) && |
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408 (this->*p)(i, b, cur_level))) { |
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409 next_level = CompLevel_full_profile; |
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410 } |
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411 } else { |
| 2348 | 412 next_level = CompLevel_full_optimization; |
| 413 } | |
| 414 } | |
| 415 } | |
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416 break; |
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417 case CompLevel_full_profile: |
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418 { |
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419 MethodData* mdo = method->method_data(); |
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420 if (mdo != NULL) { |
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421 if (mdo->would_profile()) { |
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422 int mdo_i = mdo->invocation_count_delta(); |
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423 int mdo_b = mdo->backedge_count_delta(); |
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424 if ((this->*p)(mdo_i, mdo_b, cur_level)) { |
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425 next_level = CompLevel_full_optimization; |
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426 } |
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427 } else { |
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428 next_level = CompLevel_full_optimization; |
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429 } |
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430 } |
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431 } |
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432 break; |
| 2348 | 433 } |
| 434 } | |
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435 return MIN2(next_level, (CompLevel)TieredStopAtLevel); |
| 2348 | 436 } |
| 437 | |
| 438 // Determine if a method should be compiled with a normal entry point at a different level. | |
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439 CompLevel AdvancedThresholdPolicy::call_event(Method* method, CompLevel cur_level, JavaThread * thread) { |
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440 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
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441 common(&AdvancedThresholdPolicy::loop_predicate, method, cur_level, true)); |
| 2348 | 442 CompLevel next_level = common(&AdvancedThresholdPolicy::call_predicate, method, cur_level); |
| 443 | |
| 444 // If OSR method level is greater than the regular method level, the levels should be | |
| 445 // equalized by raising the regular method level in order to avoid OSRs during each | |
| 446 // invocation of the method. | |
| 447 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { | |
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448 MethodData* mdo = method->method_data(); |
| 2348 | 449 guarantee(mdo != NULL, "MDO should not be NULL"); |
| 450 if (mdo->invocation_count() >= 1) { | |
| 451 next_level = CompLevel_full_optimization; | |
| 452 } | |
| 453 } else { | |
| 454 next_level = MAX2(osr_level, next_level); | |
| 455 } | |
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456 COMPILERJVMCI_PRESENT(next_level = JVMCIRuntime::adjust_comp_level(method, false, next_level, thread);) |
| 2348 | 457 return next_level; |
| 458 } | |
| 459 | |
| 460 // Determine if we should do an OSR compilation of a given method. | |
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461 CompLevel AdvancedThresholdPolicy::loop_event(Method* method, CompLevel cur_level, JavaThread * thread) { |
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462 CompLevel next_level = common(&AdvancedThresholdPolicy::loop_predicate, method, cur_level, true); |
| 2348 | 463 if (cur_level == CompLevel_none) { |
| 464 // If there is a live OSR method that means that we deopted to the interpreter | |
| 465 // for the transition. | |
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466 CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
| 2348 | 467 if (osr_level > CompLevel_none) { |
| 468 return osr_level; | |
| 469 } | |
| 470 } | |
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471 COMPILERJVMCI_PRESENT(next_level = JVMCIRuntime::adjust_comp_level(method, true, next_level, thread);) |
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472 return next_level; |
| 2348 | 473 } |
| 474 | |
| 475 // Update the rate and submit compile | |
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476 void AdvancedThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
| 2348 | 477 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); |
| 478 update_rate(os::javaTimeMillis(), mh()); | |
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479 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", thread); |
| 2348 | 480 } |
| 481 | |
| 482 // Handle the invocation event. | |
| 483 void AdvancedThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh, | |
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484 CompLevel level, nmethod* nm, JavaThread* thread) { |
| 2348 | 485 if (should_create_mdo(mh(), level)) { |
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486 create_mdo(mh, thread); |
| 2348 | 487 } |
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488 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh)) { |
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489 CompLevel next_level = call_event(mh(), level, thread); |
| 2348 | 490 if (next_level != level) { |
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491 compile(mh, InvocationEntryBci, next_level, thread); |
| 2348 | 492 } |
| 493 } | |
| 494 } | |
| 495 | |
| 496 // Handle the back branch event. Notice that we can compile the method | |
| 497 // with a regular entry from here. | |
| 498 void AdvancedThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh, | |
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499 int bci, CompLevel level, nmethod* nm, JavaThread* thread) { |
| 2348 | 500 if (should_create_mdo(mh(), level)) { |
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501 create_mdo(mh, thread); |
| 2348 | 502 } |
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503 // Check if MDO should be created for the inlined method |
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504 if (should_create_mdo(imh(), level)) { |
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505 create_mdo(imh, thread); |
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506 } |
| 2348 | 507 |
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508 if (is_compilation_enabled()) { |
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509 CompLevel next_osr_level = loop_event(imh(), level, thread); |
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510 CompLevel max_osr_level = (CompLevel)imh->highest_osr_comp_level(); |
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511 // At the very least compile the OSR version |
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512 if (!CompileBroker::compilation_is_in_queue(imh) && (next_osr_level != level)) { |
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513 compile(imh, bci, next_osr_level, thread); |
| 2348 | 514 } |
| 515 | |
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516 // Use loop event as an opportunity to also check if there's been |
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517 // enough calls. |
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518 CompLevel cur_level, next_level; |
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519 if (mh() != imh()) { // If there is an enclosing method |
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520 guarantee(nm != NULL, "Should have nmethod here"); |
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521 cur_level = comp_level(mh()); |
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522 next_level = call_event(mh(), cur_level, thread); |
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523 |
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524 if (max_osr_level == CompLevel_full_optimization) { |
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525 // The inlinee OSRed to full opt, we need to modify the enclosing method to avoid deopts |
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526 bool make_not_entrant = false; |
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527 if (nm->is_osr_method()) { |
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528 // This is an osr method, just make it not entrant and recompile later if needed |
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529 make_not_entrant = true; |
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530 } else { |
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531 if (next_level != CompLevel_full_optimization) { |
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532 // next_level is not full opt, so we need to recompile the |
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533 // enclosing method without the inlinee |
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534 cur_level = CompLevel_none; |
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535 make_not_entrant = true; |
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536 } |
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537 } |
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538 if (make_not_entrant) { |
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539 if (PrintTieredEvents) { |
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540 int osr_bci = nm->is_osr_method() ? nm->osr_entry_bci() : InvocationEntryBci; |
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541 print_event(MAKE_NOT_ENTRANT, mh(), mh(), osr_bci, level); |
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542 } |
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543 nm->make_not_entrant(); |
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544 } |
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545 } |
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546 if (!CompileBroker::compilation_is_in_queue(mh)) { |
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547 // Fix up next_level if necessary to avoid deopts |
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548 if (next_level == CompLevel_limited_profile && max_osr_level == CompLevel_full_profile) { |
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549 next_level = CompLevel_full_profile; |
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550 } |
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551 if (cur_level != next_level) { |
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552 compile(mh, InvocationEntryBci, next_level, thread); |
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553 } |
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554 } |
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555 } else { |
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556 cur_level = comp_level(imh()); |
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557 next_level = call_event(imh(), cur_level, thread); |
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558 if (!CompileBroker::compilation_is_in_queue(imh) && (next_level != cur_level)) { |
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559 compile(imh, InvocationEntryBci, next_level, thread); |
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560 } |
| 2348 | 561 } |
| 562 } | |
| 563 } | |
| 564 | |
| 565 #endif // TIERED |