Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/simpleThresholdPolicy.cpp @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 18 Sep 2017 18:49:45 +0200 |
parents | 3ef45d0a6d77 |
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rev | line source |
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1783 | 1 /* |
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2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
1783 | 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 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "compiler/compileBroker.hpp" | |
27 #include "memory/resourceArea.hpp" | |
28 #include "runtime/arguments.hpp" | |
29 #include "runtime/simpleThresholdPolicy.hpp" | |
30 #include "runtime/simpleThresholdPolicy.inline.hpp" | |
2252 | 31 #include "code/scopeDesc.hpp" |
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32 #if INCLUDE_JVMCI |
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33 #include "jvmci/jvmciRuntime.hpp" |
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34 #endif |
1783 | 35 |
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36 |
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37 void SimpleThresholdPolicy::print_counters(const char* prefix, methodHandle mh) { |
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38 int invocation_count = mh->invocation_count(); |
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39 int backedge_count = mh->backedge_count(); |
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40 MethodData* mdh = mh->method_data(); |
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41 int mdo_invocations = 0, mdo_backedges = 0; |
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42 int mdo_invocations_start = 0, mdo_backedges_start = 0; |
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43 if (mdh != NULL) { |
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44 mdo_invocations = mdh->invocation_count(); |
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45 mdo_backedges = mdh->backedge_count(); |
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46 mdo_invocations_start = mdh->invocation_count_start(); |
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47 mdo_backedges_start = mdh->backedge_count_start(); |
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48 } |
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49 tty->print(" %stotal=%d,%d %smdo=%d(%d),%d(%d)", prefix, |
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50 invocation_count, backedge_count, prefix, |
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51 mdo_invocations, mdo_invocations_start, |
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52 mdo_backedges, mdo_backedges_start); |
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53 tty->print(" %smax levels=%d,%d", prefix, |
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54 mh->highest_comp_level(), mh->highest_osr_comp_level()); |
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55 } |
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56 |
1783 | 57 // Print an event. |
58 void SimpleThresholdPolicy::print_event(EventType type, methodHandle mh, methodHandle imh, | |
59 int bci, CompLevel level) { | |
60 bool inlinee_event = mh() != imh(); | |
61 | |
62 ttyLocker tty_lock; | |
63 tty->print("%lf: [", os::elapsedTime()); | |
64 | |
65 switch(type) { | |
66 case CALL: | |
67 tty->print("call"); | |
68 break; | |
69 case LOOP: | |
70 tty->print("loop"); | |
71 break; | |
72 case COMPILE: | |
73 tty->print("compile"); | |
2252 | 74 break; |
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75 case REMOVE_FROM_QUEUE: |
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76 tty->print("remove-from-queue"); |
2252 | 77 break; |
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78 case UPDATE_IN_QUEUE: |
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79 tty->print("update-in-queue"); |
2252 | 80 break; |
81 case REPROFILE: | |
82 tty->print("reprofile"); | |
83 break; | |
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84 case MAKE_NOT_ENTRANT: |
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85 tty->print("make-not-entrant"); |
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86 break; |
2252 | 87 default: |
88 tty->print("unknown"); | |
1783 | 89 } |
90 | |
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91 tty->print(" level=%d ", level); |
1783 | 92 |
93 ResourceMark rm; | |
94 char *method_name = mh->name_and_sig_as_C_string(); | |
95 tty->print("[%s", method_name); | |
96 if (inlinee_event) { | |
97 char *inlinee_name = imh->name_and_sig_as_C_string(); | |
98 tty->print(" [%s]] ", inlinee_name); | |
99 } | |
100 else tty->print("] "); | |
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101 tty->print("@%d queues=%d,%d", bci, CompileBroker::queue_size(CompLevel_full_profile), |
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102 CompileBroker::queue_size(CompLevel_full_optimization)); |
1783 | 103 |
104 print_specific(type, mh, imh, bci, level); | |
105 | |
106 if (type != COMPILE) { | |
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107 print_counters("", mh); |
1783 | 108 if (inlinee_event) { |
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109 print_counters("inlinee ", imh); |
1783 | 110 } |
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111 tty->print(" compilable="); |
1783 | 112 bool need_comma = false; |
113 if (!mh->is_not_compilable(CompLevel_full_profile)) { | |
114 tty->print("c1"); | |
115 need_comma = true; | |
116 } | |
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117 if (!mh->is_not_osr_compilable(CompLevel_full_profile)) { |
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118 if (need_comma) tty->print(","); |
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119 tty->print("c1-osr"); |
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120 need_comma = true; |
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121 } |
1783 | 122 if (!mh->is_not_compilable(CompLevel_full_optimization)) { |
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123 if (need_comma) tty->print(","); |
1783 | 124 tty->print("c2"); |
125 need_comma = true; | |
126 } | |
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127 if (!mh->is_not_osr_compilable(CompLevel_full_optimization)) { |
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128 if (need_comma) tty->print(","); |
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129 tty->print("c2-osr"); |
1783 | 130 } |
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131 tty->print(" status="); |
1783 | 132 if (mh->queued_for_compilation()) { |
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133 tty->print("in-queue"); |
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134 } else tty->print("idle"); |
1783 | 135 } |
136 tty->print_cr("]"); | |
137 } | |
138 | |
139 void SimpleThresholdPolicy::initialize() { | |
140 if (FLAG_IS_DEFAULT(CICompilerCount)) { | |
141 FLAG_SET_DEFAULT(CICompilerCount, 3); | |
142 } | |
143 int count = CICompilerCount; | |
144 if (CICompilerCountPerCPU) { | |
145 count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2; | |
146 } | |
147 set_c1_count(MAX2(count / 3, 1)); | |
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148 set_c2_count(MAX2(count - c1_count(), 1)); |
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149 FLAG_SET_ERGO(intx, CICompilerCount, c1_count() + c2_count()); |
1783 | 150 } |
151 | |
152 void SimpleThresholdPolicy::set_carry_if_necessary(InvocationCounter *counter) { | |
153 if (!counter->carry() && counter->count() > InvocationCounter::count_limit / 2) { | |
154 counter->set_carry_flag(); | |
155 } | |
156 } | |
157 | |
158 // Set carry flags on the counters if necessary | |
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159 void SimpleThresholdPolicy::handle_counter_overflow(Method* method) { |
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160 MethodCounters *mcs = method->method_counters(); |
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161 if (mcs != NULL) { |
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162 set_carry_if_necessary(mcs->invocation_counter()); |
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163 set_carry_if_necessary(mcs->backedge_counter()); |
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164 } |
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165 MethodData* mdo = method->method_data(); |
1783 | 166 if (mdo != NULL) { |
167 set_carry_if_necessary(mdo->invocation_counter()); | |
168 set_carry_if_necessary(mdo->backedge_counter()); | |
169 } | |
170 } | |
171 | |
172 // Called with the queue locked and with at least one element | |
173 CompileTask* SimpleThresholdPolicy::select_task(CompileQueue* compile_queue) { | |
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174 return select_task_helper(compile_queue); |
1783 | 175 } |
176 | |
2252 | 177 void SimpleThresholdPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { |
178 for (ScopeDesc* sd = trap_scope;; sd = sd->sender()) { | |
179 if (PrintTieredEvents) { | |
180 methodHandle mh(sd->method()); | |
181 print_event(REPROFILE, mh, mh, InvocationEntryBci, CompLevel_none); | |
182 } | |
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183 MethodData* mdo = sd->method()->method_data(); |
2252 | 184 if (mdo != NULL) { |
185 mdo->reset_start_counters(); | |
186 } | |
187 if (sd->is_top()) break; | |
188 } | |
189 } | |
190 | |
1783 | 191 nmethod* SimpleThresholdPolicy::event(methodHandle method, methodHandle inlinee, |
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192 int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) { |
1783 | 193 if (comp_level == CompLevel_none && |
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194 JvmtiExport::can_post_interpreter_events() && |
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195 thread->is_interp_only_mode()) { |
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196 return NULL; |
1783 | 197 } |
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198 if (CompileTheWorld || ReplayCompiles) { |
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199 // Don't trigger other compiles in testing mode |
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200 return NULL; |
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201 } |
1783 | 202 |
203 handle_counter_overflow(method()); | |
204 if (method() != inlinee()) { | |
205 handle_counter_overflow(inlinee()); | |
206 } | |
207 | |
208 if (PrintTieredEvents) { | |
209 print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level); | |
210 } | |
211 | |
212 if (bci == InvocationEntryBci) { | |
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213 method_invocation_event(method, inlinee, comp_level, nm, thread); |
1783 | 214 } else { |
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215 // method == inlinee if the event originated in the main method |
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216 method_back_branch_event(method, inlinee, bci, comp_level, nm, thread); |
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217 // Check if event led to a higher level OSR compilation |
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218 nmethod* osr_nm = inlinee->lookup_osr_nmethod_for(bci, comp_level, false); |
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219 if (osr_nm != NULL && osr_nm->comp_level() > comp_level) { |
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220 // Perform OSR with new nmethod |
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221 return osr_nm; |
1783 | 222 } |
223 } | |
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224 return NULL; |
1783 | 225 } |
226 | |
227 // Check if the method can be compiled, change level if necessary | |
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228 void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
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229 assert(level <= TieredStopAtLevel, "Invalid compilation level"); |
1783 | 230 if (level == CompLevel_none) { |
231 return; | |
232 } | |
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233 // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling |
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234 // in the interpreter and then compile with C2 (the transition function will request that, |
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235 // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with |
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236 // pure C1. |
1783 | 237 if (!can_be_compiled(mh, level)) { |
238 if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) { | |
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239 compile(mh, bci, CompLevel_simple, thread); |
1783 | 240 } |
241 return; | |
242 } | |
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243 if (bci != InvocationEntryBci && mh->is_not_osr_compilable(level)) { |
1783 | 244 return; |
245 } | |
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246 if (!CompileBroker::compilation_is_in_queue(mh)) { |
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247 if (PrintTieredEvents) { |
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248 print_event(COMPILE, mh, mh, bci, level); |
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249 } |
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250 submit_compile(mh, bci, level, thread); |
1783 | 251 } |
252 } | |
253 | |
254 // Tell the broker to compile the method | |
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255 void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
1783 | 256 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); |
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257 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", thread); |
1783 | 258 } |
259 | |
260 // Call and loop predicates determine whether a transition to a higher | |
261 // compilation level should be performed (pointers to predicate functions | |
262 // are passed to common() transition function). | |
263 bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) { | |
264 switch(cur_level) { | |
265 case CompLevel_none: | |
266 case CompLevel_limited_profile: { | |
267 return loop_predicate_helper<CompLevel_none>(i, b, 1.0); | |
268 } | |
269 case CompLevel_full_profile: { | |
270 return loop_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
271 } | |
272 default: | |
273 return true; | |
274 } | |
275 } | |
276 | |
277 bool SimpleThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) { | |
278 switch(cur_level) { | |
279 case CompLevel_none: | |
280 case CompLevel_limited_profile: { | |
281 return call_predicate_helper<CompLevel_none>(i, b, 1.0); | |
282 } | |
283 case CompLevel_full_profile: { | |
284 return call_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
285 } | |
286 default: | |
287 return true; | |
288 } | |
289 } | |
290 | |
291 // Determine is a method is mature. | |
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292 bool SimpleThresholdPolicy::is_mature(Method* method) { |
1783 | 293 if (is_trivial(method)) return true; |
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294 MethodData* mdo = method->method_data(); |
1783 | 295 if (mdo != NULL) { |
296 int i = mdo->invocation_count(); | |
297 int b = mdo->backedge_count(); | |
298 double k = ProfileMaturityPercentage / 100.0; | |
299 return call_predicate_helper<CompLevel_full_profile>(i, b, k) || | |
300 loop_predicate_helper<CompLevel_full_profile>(i, b, k); | |
301 } | |
302 return false; | |
303 } | |
304 | |
305 // Common transition function. Given a predicate determines if a method should transition to another level. | |
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306 CompLevel SimpleThresholdPolicy::common(Predicate p, Method* method, CompLevel cur_level) { |
1783 | 307 CompLevel next_level = cur_level; |
308 int i = method->invocation_count(); | |
309 int b = method->backedge_count(); | |
310 | |
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311 if (is_trivial(method)) { |
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312 next_level = CompLevel_simple; |
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313 } else { |
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314 switch(cur_level) { |
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315 case CompLevel_none: |
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316 // If we were at full profile level, would we switch to full opt? |
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317 if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) { |
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318 next_level = CompLevel_full_optimization; |
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319 } else if ((this->*p)(i, b, cur_level)) { |
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320 next_level = CompLevel_full_profile; |
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321 } |
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322 break; |
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323 case CompLevel_limited_profile: |
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324 case CompLevel_full_profile: |
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325 { |
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326 MethodData* mdo = method->method_data(); |
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327 if (mdo != NULL) { |
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328 if (mdo->would_profile()) { |
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329 int mdo_i = mdo->invocation_count_delta(); |
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330 int mdo_b = mdo->backedge_count_delta(); |
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331 if ((this->*p)(mdo_i, mdo_b, cur_level)) { |
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332 next_level = CompLevel_full_optimization; |
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333 } |
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334 } else { |
2252 | 335 next_level = CompLevel_full_optimization; |
336 } | |
1783 | 337 } |
338 } | |
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339 break; |
1783 | 340 } |
341 } | |
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342 return MIN2(next_level, (CompLevel)TieredStopAtLevel); |
1783 | 343 } |
344 | |
345 // Determine if a method should be compiled with a normal entry point at a different level. | |
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346 CompLevel SimpleThresholdPolicy::call_event(Method* method, CompLevel cur_level, JavaThread* thread) { |
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347 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
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348 common(&SimpleThresholdPolicy::loop_predicate, method, cur_level)); |
1783 | 349 CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level); |
350 | |
351 // If OSR method level is greater than the regular method level, the levels should be | |
352 // equalized by raising the regular method level in order to avoid OSRs during each | |
353 // invocation of the method. | |
354 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { | |
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355 MethodData* mdo = method->method_data(); |
1783 | 356 guarantee(mdo != NULL, "MDO should not be NULL"); |
357 if (mdo->invocation_count() >= 1) { | |
358 next_level = CompLevel_full_optimization; | |
359 } | |
360 } else { | |
361 next_level = MAX2(osr_level, next_level); | |
362 } | |
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363 #if INCLUDE_JVMCI |
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364 if (UseJVMCICompiler) { |
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365 next_level = JVMCIRuntime::adjust_comp_level(method, false, next_level, thread); |
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366 } |
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367 #endif |
1783 | 368 return next_level; |
369 } | |
370 | |
371 // Determine if we should do an OSR compilation of a given method. | |
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372 CompLevel SimpleThresholdPolicy::loop_event(Method* method, CompLevel cur_level, JavaThread* thread) { |
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373 CompLevel next_level = common(&SimpleThresholdPolicy::loop_predicate, method, cur_level); |
1783 | 374 if (cur_level == CompLevel_none) { |
375 // If there is a live OSR method that means that we deopted to the interpreter | |
376 // for the transition. | |
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377 CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
1783 | 378 if (osr_level > CompLevel_none) { |
379 return osr_level; | |
380 } | |
381 } | |
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382 #if INCLUDE_JVMCI |
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383 if (UseJVMCICompiler) { |
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384 next_level = JVMCIRuntime::adjust_comp_level(method, true, next_level, thread); |
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385 } |
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386 #endif |
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387 return next_level; |
1783 | 388 } |
389 | |
390 | |
391 // Handle the invocation event. | |
392 void SimpleThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh, | |
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393 CompLevel level, nmethod* nm, JavaThread* thread) { |
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394 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh)) { |
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395 CompLevel next_level = call_event(mh(), level, thread); |
1783 | 396 if (next_level != level) { |
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397 compile(mh, InvocationEntryBci, next_level, thread); |
1783 | 398 } |
399 } | |
400 } | |
401 | |
402 // Handle the back branch event. Notice that we can compile the method | |
403 // with a regular entry from here. | |
404 void SimpleThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh, | |
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405 int bci, CompLevel level, nmethod* nm, JavaThread* thread) { |
1783 | 406 // If the method is already compiling, quickly bail out. |
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407 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh)) { |
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408 // Use loop event as an opportunity to also check there's been |
1783 | 409 // enough calls. |
410 CompLevel cur_level = comp_level(mh()); | |
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411 CompLevel next_level = call_event(mh(), cur_level, thread); |
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412 CompLevel next_osr_level = loop_event(mh(), level, thread); |
1783 | 413 |
414 next_level = MAX2(next_level, | |
415 next_osr_level < CompLevel_full_optimization ? next_osr_level : cur_level); | |
416 bool is_compiling = false; | |
417 if (next_level != cur_level) { | |
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418 compile(mh, InvocationEntryBci, next_level, thread); |
1783 | 419 is_compiling = true; |
420 } | |
421 | |
422 // Do the OSR version | |
423 if (!is_compiling && next_osr_level != level) { | |
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424 compile(mh, bci, next_osr_level, thread); |
1783 | 425 } |
426 } | |
427 } |