Mercurial > hg > truffle
annotate src/share/vm/runtime/advancedThresholdPolicy.cpp @ 4945:cfdfbeac0a5b
7145345: Code cache sweeper must cooperate with safepoints
Summary: Safepoint in the sweeper loop in necessary
Reviewed-by: kvn, never
author | iveresov |
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date | Wed, 15 Feb 2012 12:32:03 -0800 |
parents | 20334ed5ed3c |
children | da91efe96a93 |
rev | line source |
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2348 | 1 /* |
3358 | 2 * Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved. |
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" | |
28 | |
29 #ifdef TIERED | |
30 // Print an event. | |
31 void AdvancedThresholdPolicy::print_specific(EventType type, methodHandle mh, methodHandle imh, | |
32 int bci, CompLevel level) { | |
33 tty->print(" rate: "); | |
34 if (mh->prev_time() == 0) tty->print("n/a"); | |
35 else tty->print("%f", mh->rate()); | |
36 | |
37 tty->print(" k: %.2lf,%.2lf", threshold_scale(CompLevel_full_profile, Tier3LoadFeedback), | |
38 threshold_scale(CompLevel_full_optimization, Tier4LoadFeedback)); | |
39 | |
40 } | |
41 | |
42 void AdvancedThresholdPolicy::initialize() { | |
43 // Turn on ergonomic compiler count selection | |
44 if (FLAG_IS_DEFAULT(CICompilerCountPerCPU) && FLAG_IS_DEFAULT(CICompilerCount)) { | |
45 FLAG_SET_DEFAULT(CICompilerCountPerCPU, true); | |
46 } | |
47 int count = CICompilerCount; | |
48 if (CICompilerCountPerCPU) { | |
49 // Simple log n seems to grow too slowly for tiered, try something faster: log n * log log n | |
50 int log_cpu = log2_intptr(os::active_processor_count()); | |
51 int loglog_cpu = log2_intptr(MAX2(log_cpu, 1)); | |
52 count = MAX2(log_cpu * loglog_cpu, 1) * 3 / 2; | |
53 } | |
54 | |
55 set_c1_count(MAX2(count / 3, 1)); | |
56 set_c2_count(MAX2(count - count / 3, 1)); | |
57 | |
58 // Some inlining tuning | |
59 #ifdef X86 | |
60 if (FLAG_IS_DEFAULT(InlineSmallCode)) { | |
61 FLAG_SET_DEFAULT(InlineSmallCode, 2000); | |
62 } | |
63 #endif | |
64 | |
65 #ifdef SPARC | |
66 if (FLAG_IS_DEFAULT(InlineSmallCode)) { | |
67 FLAG_SET_DEFAULT(InlineSmallCode, 2500); | |
68 } | |
69 #endif | |
70 | |
71 | |
72 set_start_time(os::javaTimeMillis()); | |
73 } | |
74 | |
75 // update_rate() is called from select_task() while holding a compile queue lock. | |
76 void AdvancedThresholdPolicy::update_rate(jlong t, methodOop m) { | |
77 if (is_old(m)) { | |
78 // We don't remove old methods from the queue, | |
79 // so we can just zero the rate. | |
80 m->set_rate(0); | |
81 return; | |
82 } | |
83 | |
84 // We don't update the rate if we've just came out of a safepoint. | |
85 // delta_s is the time since last safepoint in milliseconds. | |
86 jlong delta_s = t - SafepointSynchronize::end_of_last_safepoint(); | |
87 jlong delta_t = t - (m->prev_time() != 0 ? m->prev_time() : start_time()); // milliseconds since the last measurement | |
88 // How many events were there since the last time? | |
89 int event_count = m->invocation_count() + m->backedge_count(); | |
90 int delta_e = event_count - m->prev_event_count(); | |
91 | |
92 // We should be running for at least 1ms. | |
93 if (delta_s >= TieredRateUpdateMinTime) { | |
94 // And we must've taken the previous point at least 1ms before. | |
95 if (delta_t >= TieredRateUpdateMinTime && delta_e > 0) { | |
96 m->set_prev_time(t); | |
97 m->set_prev_event_count(event_count); | |
98 m->set_rate((float)delta_e / (float)delta_t); // Rate is events per millisecond | |
99 } else | |
100 if (delta_t > TieredRateUpdateMaxTime && delta_e == 0) { | |
101 // If nothing happened for 25ms, zero the rate. Don't modify prev values. | |
102 m->set_rate(0); | |
103 } | |
104 } | |
105 } | |
106 | |
107 // Check if this method has been stale from a given number of milliseconds. | |
108 // See select_task(). | |
109 bool AdvancedThresholdPolicy::is_stale(jlong t, jlong timeout, methodOop m) { | |
110 jlong delta_s = t - SafepointSynchronize::end_of_last_safepoint(); | |
111 jlong delta_t = t - m->prev_time(); | |
112 if (delta_t > timeout && delta_s > timeout) { | |
113 int event_count = m->invocation_count() + m->backedge_count(); | |
114 int delta_e = event_count - m->prev_event_count(); | |
115 // Return true if there were no events. | |
116 return delta_e == 0; | |
117 } | |
118 return false; | |
119 } | |
120 | |
121 // We don't remove old methods from the compile queue even if they have | |
122 // very low activity. See select_task(). | |
123 bool AdvancedThresholdPolicy::is_old(methodOop method) { | |
124 return method->invocation_count() > 50000 || method->backedge_count() > 500000; | |
125 } | |
126 | |
127 double AdvancedThresholdPolicy::weight(methodOop method) { | |
128 return (method->rate() + 1) * ((method->invocation_count() + 1) * (method->backedge_count() + 1)); | |
129 } | |
130 | |
131 // Apply heuristics and return true if x should be compiled before y | |
132 bool AdvancedThresholdPolicy::compare_methods(methodOop x, methodOop y) { | |
133 if (x->highest_comp_level() > y->highest_comp_level()) { | |
134 // recompilation after deopt | |
135 return true; | |
136 } else | |
137 if (x->highest_comp_level() == y->highest_comp_level()) { | |
138 if (weight(x) > weight(y)) { | |
139 return true; | |
140 } | |
141 } | |
142 return false; | |
143 } | |
144 | |
145 // Is method profiled enough? | |
146 bool AdvancedThresholdPolicy::is_method_profiled(methodOop method) { | |
147 methodDataOop mdo = method->method_data(); | |
148 if (mdo != NULL) { | |
149 int i = mdo->invocation_count_delta(); | |
150 int b = mdo->backedge_count_delta(); | |
151 return call_predicate_helper<CompLevel_full_profile>(i, b, 1); | |
152 } | |
153 return false; | |
154 } | |
155 | |
156 // Called with the queue locked and with at least one element | |
157 CompileTask* AdvancedThresholdPolicy::select_task(CompileQueue* compile_queue) { | |
158 CompileTask *max_task = NULL; | |
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159 methodHandle max_method; |
2348 | 160 jlong t = os::javaTimeMillis(); |
161 // Iterate through the queue and find a method with a maximum rate. | |
162 for (CompileTask* task = compile_queue->first(); task != NULL;) { | |
163 CompileTask* next_task = task->next(); | |
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164 methodHandle method = (methodOop)JNIHandles::resolve(task->method_handle()); |
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165 update_rate(t, method()); |
2348 | 166 if (max_task == NULL) { |
167 max_task = task; | |
168 max_method = method; | |
169 } else { | |
170 // If a method has been stale for some time, remove it from the queue. | |
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171 if (is_stale(t, TieredCompileTaskTimeout, method()) && !is_old(method())) { |
2348 | 172 if (PrintTieredEvents) { |
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173 print_event(REMOVE_FROM_QUEUE, method, method, task->osr_bci(), (CompLevel)task->comp_level()); |
2348 | 174 } |
175 CompileTaskWrapper ctw(task); // Frees the task | |
176 compile_queue->remove(task); | |
177 method->clear_queued_for_compilation(); | |
178 task = next_task; | |
179 continue; | |
180 } | |
181 | |
182 // Select a method with a higher rate | |
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183 if (compare_methods(method(), max_method())) { |
2348 | 184 max_task = task; |
185 max_method = method; | |
186 } | |
187 } | |
188 task = next_task; | |
189 } | |
190 | |
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191 if (max_task->comp_level() == CompLevel_full_profile && TieredStopAtLevel > CompLevel_full_profile |
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192 && is_method_profiled(max_method())) { |
2348 | 193 max_task->set_comp_level(CompLevel_limited_profile); |
194 if (PrintTieredEvents) { | |
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195 print_event(UPDATE_IN_QUEUE, max_method, max_method, max_task->osr_bci(), (CompLevel)max_task->comp_level()); |
2348 | 196 } |
197 } | |
198 | |
199 return max_task; | |
200 } | |
201 | |
202 double AdvancedThresholdPolicy::threshold_scale(CompLevel level, int feedback_k) { | |
203 double queue_size = CompileBroker::queue_size(level); | |
204 int comp_count = compiler_count(level); | |
205 double k = queue_size / (feedback_k * comp_count) + 1; | |
206 return k; | |
207 } | |
208 | |
209 // Call and loop predicates determine whether a transition to a higher | |
210 // compilation level should be performed (pointers to predicate functions | |
211 // are passed to common()). | |
212 // Tier?LoadFeedback is basically a coefficient that determines of | |
213 // how many methods per compiler thread can be in the queue before | |
214 // the threshold values double. | |
215 bool AdvancedThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) { | |
216 switch(cur_level) { | |
217 case CompLevel_none: | |
218 case CompLevel_limited_profile: { | |
219 double k = threshold_scale(CompLevel_full_profile, Tier3LoadFeedback); | |
220 return loop_predicate_helper<CompLevel_none>(i, b, k); | |
221 } | |
222 case CompLevel_full_profile: { | |
223 double k = threshold_scale(CompLevel_full_optimization, Tier4LoadFeedback); | |
224 return loop_predicate_helper<CompLevel_full_profile>(i, b, k); | |
225 } | |
226 default: | |
227 return true; | |
228 } | |
229 } | |
230 | |
231 bool AdvancedThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) { | |
232 switch(cur_level) { | |
233 case CompLevel_none: | |
234 case CompLevel_limited_profile: { | |
235 double k = threshold_scale(CompLevel_full_profile, Tier3LoadFeedback); | |
236 return call_predicate_helper<CompLevel_none>(i, b, k); | |
237 } | |
238 case CompLevel_full_profile: { | |
239 double k = threshold_scale(CompLevel_full_optimization, Tier4LoadFeedback); | |
240 return call_predicate_helper<CompLevel_full_profile>(i, b, k); | |
241 } | |
242 default: | |
243 return true; | |
244 } | |
245 } | |
246 | |
247 // If a method is old enough and is still in the interpreter we would want to | |
248 // start profiling without waiting for the compiled method to arrive. | |
249 // We also take the load on compilers into the account. | |
250 bool AdvancedThresholdPolicy::should_create_mdo(methodOop method, CompLevel cur_level) { | |
251 if (cur_level == CompLevel_none && | |
252 CompileBroker::queue_size(CompLevel_full_optimization) <= | |
253 Tier3DelayOn * compiler_count(CompLevel_full_optimization)) { | |
254 int i = method->invocation_count(); | |
255 int b = method->backedge_count(); | |
256 double k = Tier0ProfilingStartPercentage / 100.0; | |
257 return call_predicate_helper<CompLevel_none>(i, b, k) || loop_predicate_helper<CompLevel_none>(i, b, k); | |
258 } | |
259 return false; | |
260 } | |
261 | |
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262 // Inlining control: if we're compiling a profiled method with C1 and the callee |
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263 // is known to have OSRed in a C2 version, don't inline it. |
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264 bool AdvancedThresholdPolicy::should_not_inline(ciEnv* env, ciMethod* callee) { |
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265 CompLevel comp_level = (CompLevel)env->comp_level(); |
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266 if (comp_level == CompLevel_full_profile || |
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267 comp_level == CompLevel_limited_profile) { |
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268 return callee->highest_osr_comp_level() == CompLevel_full_optimization; |
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269 } |
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270 return false; |
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271 } |
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272 |
2348 | 273 // Create MDO if necessary. |
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274 void AdvancedThresholdPolicy::create_mdo(methodHandle mh, JavaThread* THREAD) { |
2348 | 275 if (mh->is_native() || mh->is_abstract() || mh->is_accessor()) return; |
276 if (mh->method_data() == NULL) { | |
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277 methodOopDesc::build_interpreter_method_data(mh, CHECK_AND_CLEAR); |
2348 | 278 } |
279 } | |
280 | |
281 | |
282 /* | |
283 * Method states: | |
284 * 0 - interpreter (CompLevel_none) | |
285 * 1 - pure C1 (CompLevel_simple) | |
286 * 2 - C1 with invocation and backedge counting (CompLevel_limited_profile) | |
287 * 3 - C1 with full profiling (CompLevel_full_profile) | |
288 * 4 - C2 (CompLevel_full_optimization) | |
289 * | |
290 * Common state transition patterns: | |
291 * a. 0 -> 3 -> 4. | |
292 * The most common path. But note that even in this straightforward case | |
293 * profiling can start at level 0 and finish at level 3. | |
294 * | |
295 * b. 0 -> 2 -> 3 -> 4. | |
296 * This case occures when the load on C2 is deemed too high. So, instead of transitioning | |
297 * into state 3 directly and over-profiling while a method is in the C2 queue we transition to | |
298 * level 2 and wait until the load on C2 decreases. This path is disabled for OSRs. | |
299 * | |
300 * c. 0 -> (3->2) -> 4. | |
301 * In this case we enqueue a method for compilation at level 3, but the C1 queue is long enough | |
302 * to enable the profiling to fully occur at level 0. In this case we change the compilation level | |
303 * of the method to 2, because it'll allow it to run much faster without full profiling while c2 | |
304 * is compiling. | |
305 * | |
306 * d. 0 -> 3 -> 1 or 0 -> 2 -> 1. | |
307 * After a method was once compiled with C1 it can be identified as trivial and be compiled to | |
308 * level 1. These transition can also occur if a method can't be compiled with C2 but can with C1. | |
309 * | |
310 * e. 0 -> 4. | |
311 * This can happen if a method fails C1 compilation (it will still be profiled in the interpreter) | |
312 * or because of a deopt that didn't require reprofiling (compilation won't happen in this case because | |
313 * the compiled version already exists). | |
314 * | |
315 * Note that since state 0 can be reached from any other state via deoptimization different loops | |
316 * are possible. | |
317 * | |
318 */ | |
319 | |
320 // Common transition function. Given a predicate determines if a method should transition to another level. | |
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321 CompLevel AdvancedThresholdPolicy::common(Predicate p, methodOop method, CompLevel cur_level, bool disable_feedback) { |
2348 | 322 CompLevel next_level = cur_level; |
323 int i = method->invocation_count(); | |
324 int b = method->backedge_count(); | |
325 | |
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326 if (is_trivial(method)) { |
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327 next_level = CompLevel_simple; |
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328 } else { |
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329 switch(cur_level) { |
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330 case CompLevel_none: |
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331 // If we were at full profile level, would we switch to full opt? |
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332 if (common(p, method, CompLevel_full_profile, disable_feedback) == CompLevel_full_optimization) { |
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333 next_level = CompLevel_full_optimization; |
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334 } else if ((this->*p)(i, b, cur_level)) { |
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335 // C1-generated fully profiled code is about 30% slower than the limited profile |
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336 // code that has only invocation and backedge counters. The observation is that |
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337 // if C2 queue is large enough we can spend too much time in the fully profiled code |
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338 // while waiting for C2 to pick the method from the queue. To alleviate this problem |
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339 // we introduce a feedback on the C2 queue size. If the C2 queue is sufficiently long |
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340 // we choose to compile a limited profiled version and then recompile with full profiling |
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341 // when the load on C2 goes down. |
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342 if (!disable_feedback && CompileBroker::queue_size(CompLevel_full_optimization) > |
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343 Tier3DelayOn * compiler_count(CompLevel_full_optimization)) { |
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344 next_level = CompLevel_limited_profile; |
2348 | 345 } else { |
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346 next_level = CompLevel_full_profile; |
2348 | 347 } |
348 } | |
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349 break; |
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350 case CompLevel_limited_profile: |
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351 if (is_method_profiled(method)) { |
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352 // Special case: we got here because this method was fully profiled in the interpreter. |
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353 next_level = CompLevel_full_optimization; |
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354 } else { |
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355 methodDataOop mdo = method->method_data(); |
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356 if (mdo != NULL) { |
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357 if (mdo->would_profile()) { |
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358 if (disable_feedback || (CompileBroker::queue_size(CompLevel_full_optimization) <= |
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359 Tier3DelayOff * compiler_count(CompLevel_full_optimization) && |
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360 (this->*p)(i, b, cur_level))) { |
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361 next_level = CompLevel_full_profile; |
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362 } |
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363 } else { |
2348 | 364 next_level = CompLevel_full_optimization; |
365 } | |
366 } | |
367 } | |
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368 break; |
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369 case CompLevel_full_profile: |
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370 { |
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371 methodDataOop mdo = method->method_data(); |
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372 if (mdo != NULL) { |
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373 if (mdo->would_profile()) { |
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374 int mdo_i = mdo->invocation_count_delta(); |
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375 int mdo_b = mdo->backedge_count_delta(); |
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376 if ((this->*p)(mdo_i, mdo_b, cur_level)) { |
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377 next_level = CompLevel_full_optimization; |
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378 } |
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379 } else { |
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380 next_level = CompLevel_full_optimization; |
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381 } |
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382 } |
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383 } |
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384 break; |
2348 | 385 } |
386 } | |
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387 return MIN2(next_level, (CompLevel)TieredStopAtLevel); |
2348 | 388 } |
389 | |
390 // Determine if a method should be compiled with a normal entry point at a different level. | |
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391 CompLevel AdvancedThresholdPolicy::call_event(methodOop method, CompLevel cur_level) { |
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392 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
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393 common(&AdvancedThresholdPolicy::loop_predicate, method, cur_level, true)); |
2348 | 394 CompLevel next_level = common(&AdvancedThresholdPolicy::call_predicate, method, cur_level); |
395 | |
396 // If OSR method level is greater than the regular method level, the levels should be | |
397 // equalized by raising the regular method level in order to avoid OSRs during each | |
398 // invocation of the method. | |
399 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { | |
400 methodDataOop mdo = method->method_data(); | |
401 guarantee(mdo != NULL, "MDO should not be NULL"); | |
402 if (mdo->invocation_count() >= 1) { | |
403 next_level = CompLevel_full_optimization; | |
404 } | |
405 } else { | |
406 next_level = MAX2(osr_level, next_level); | |
407 } | |
408 return next_level; | |
409 } | |
410 | |
411 // Determine if we should do an OSR compilation of a given method. | |
412 CompLevel AdvancedThresholdPolicy::loop_event(methodOop method, CompLevel cur_level) { | |
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413 CompLevel next_level = common(&AdvancedThresholdPolicy::loop_predicate, method, cur_level, true); |
2348 | 414 if (cur_level == CompLevel_none) { |
415 // If there is a live OSR method that means that we deopted to the interpreter | |
416 // for the transition. | |
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417 CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
2348 | 418 if (osr_level > CompLevel_none) { |
419 return osr_level; | |
420 } | |
421 } | |
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422 return next_level; |
2348 | 423 } |
424 | |
425 // Update the rate and submit compile | |
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426 void AdvancedThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
2348 | 427 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); |
428 update_rate(os::javaTimeMillis(), mh()); | |
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429 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", thread); |
2348 | 430 } |
431 | |
432 // Handle the invocation event. | |
433 void AdvancedThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh, | |
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434 CompLevel level, nmethod* nm, JavaThread* thread) { |
2348 | 435 if (should_create_mdo(mh(), level)) { |
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436 create_mdo(mh, thread); |
2348 | 437 } |
438 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, InvocationEntryBci)) { | |
439 CompLevel next_level = call_event(mh(), level); | |
440 if (next_level != level) { | |
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441 compile(mh, InvocationEntryBci, next_level, thread); |
2348 | 442 } |
443 } | |
444 } | |
445 | |
446 // Handle the back branch event. Notice that we can compile the method | |
447 // with a regular entry from here. | |
448 void AdvancedThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh, | |
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449 int bci, CompLevel level, nmethod* nm, JavaThread* thread) { |
2348 | 450 if (should_create_mdo(mh(), level)) { |
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451 create_mdo(mh, thread); |
2348 | 452 } |
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453 // Check if MDO should be created for the inlined method |
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454 if (should_create_mdo(imh(), level)) { |
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455 create_mdo(imh, thread); |
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456 } |
2348 | 457 |
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458 if (is_compilation_enabled()) { |
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459 CompLevel next_osr_level = loop_event(imh(), level); |
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460 CompLevel max_osr_level = (CompLevel)imh->highest_osr_comp_level(); |
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461 // At the very least compile the OSR version |
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462 if (!CompileBroker::compilation_is_in_queue(imh, bci) && next_osr_level != level) { |
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463 compile(imh, bci, next_osr_level, thread); |
2348 | 464 } |
465 | |
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466 // Use loop event as an opportunity to also check if there's been |
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467 // enough calls. |
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468 CompLevel cur_level, next_level; |
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469 if (mh() != imh()) { // If there is an enclosing method |
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470 guarantee(nm != NULL, "Should have nmethod here"); |
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471 cur_level = comp_level(mh()); |
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472 next_level = call_event(mh(), cur_level); |
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473 |
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474 if (max_osr_level == CompLevel_full_optimization) { |
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475 // The inlinee OSRed to full opt, we need to modify the enclosing method to avoid deopts |
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476 bool make_not_entrant = false; |
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477 if (nm->is_osr_method()) { |
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478 // This is an osr method, just make it not entrant and recompile later if needed |
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479 make_not_entrant = true; |
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480 } else { |
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481 if (next_level != CompLevel_full_optimization) { |
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482 // next_level is not full opt, so we need to recompile the |
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483 // enclosing method without the inlinee |
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484 cur_level = CompLevel_none; |
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485 make_not_entrant = true; |
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486 } |
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487 } |
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488 if (make_not_entrant) { |
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489 if (PrintTieredEvents) { |
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490 int osr_bci = nm->is_osr_method() ? nm->osr_entry_bci() : InvocationEntryBci; |
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491 print_event(MAKE_NOT_ENTRANT, mh(), mh(), osr_bci, level); |
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492 } |
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493 nm->make_not_entrant(); |
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494 } |
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495 } |
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496 if (!CompileBroker::compilation_is_in_queue(mh, InvocationEntryBci)) { |
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497 // Fix up next_level if necessary to avoid deopts |
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498 if (next_level == CompLevel_limited_profile && max_osr_level == CompLevel_full_profile) { |
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499 next_level = CompLevel_full_profile; |
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500 } |
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501 if (cur_level != next_level) { |
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502 compile(mh, InvocationEntryBci, next_level, thread); |
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503 } |
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504 } |
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505 } else { |
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506 cur_level = comp_level(imh()); |
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507 next_level = call_event(imh(), cur_level); |
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508 if (!CompileBroker::compilation_is_in_queue(imh, bci) && next_level != cur_level) { |
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509 compile(imh, InvocationEntryBci, next_level, thread); |
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510 } |
2348 | 511 } |
512 } | |
513 } | |
514 | |
515 #endif // TIERED |