Mercurial > hg > truffle
annotate src/share/vm/runtime/simpleThresholdPolicy.cpp @ 4155:394404b2d9bd
Removed strict requirement for GRAAL environment variable. It only needs to be set now if the graal directory is not in the directory hierarchy of GraalVM JDK.
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Wed, 21 Dec 2011 11:25:27 +0100 |
| parents | 973293defacd |
| children | 20334ed5ed3c |
| rev | line source |
|---|---|
| 1783 | 1 /* |
| 3358 | 2 * Copyright (c) 2010, 2011, 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" |
| 1783 | 32 |
|
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33 |
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34 void SimpleThresholdPolicy::print_counters(const char* prefix, methodHandle mh) { |
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35 int invocation_count = mh->invocation_count(); |
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36 int backedge_count = mh->backedge_count(); |
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37 methodDataHandle mdh = mh->method_data(); |
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38 int mdo_invocations = 0, mdo_backedges = 0; |
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39 int mdo_invocations_start = 0, mdo_backedges_start = 0; |
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40 if (mdh() != NULL) { |
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41 mdo_invocations = mdh->invocation_count(); |
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42 mdo_backedges = mdh->backedge_count(); |
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43 mdo_invocations_start = mdh->invocation_count_start(); |
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44 mdo_backedges_start = mdh->backedge_count_start(); |
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45 } |
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46 tty->print(" %stotal: %d,%d %smdo: %d(%d),%d(%d)", prefix, |
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47 invocation_count, backedge_count, prefix, |
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48 mdo_invocations, mdo_invocations_start, |
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49 mdo_backedges, mdo_backedges_start); |
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50 tty->print(" %smax levels: %d,%d", prefix, |
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51 mh->highest_comp_level(), mh->highest_osr_comp_level()); |
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52 } |
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53 |
| 1783 | 54 // Print an event. |
| 55 void SimpleThresholdPolicy::print_event(EventType type, methodHandle mh, methodHandle imh, | |
| 56 int bci, CompLevel level) { | |
| 57 bool inlinee_event = mh() != imh(); | |
| 58 | |
| 59 ttyLocker tty_lock; | |
| 60 tty->print("%lf: [", os::elapsedTime()); | |
| 61 | |
| 62 switch(type) { | |
| 63 case CALL: | |
| 64 tty->print("call"); | |
| 65 break; | |
| 66 case LOOP: | |
| 67 tty->print("loop"); | |
| 68 break; | |
| 69 case COMPILE: | |
| 70 tty->print("compile"); | |
| 2252 | 71 break; |
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72 case REMOVE_FROM_QUEUE: |
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73 tty->print("remove-from-queue"); |
| 2252 | 74 break; |
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75 case UPDATE_IN_QUEUE: |
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76 tty->print("update-in-queue"); |
| 2252 | 77 break; |
| 78 case REPROFILE: | |
| 79 tty->print("reprofile"); | |
| 80 break; | |
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81 case MAKE_NOT_ENTRANT: |
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82 tty->print("make-not-entrant"); |
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83 break; |
| 2252 | 84 default: |
| 85 tty->print("unknown"); | |
| 1783 | 86 } |
| 87 | |
| 88 tty->print(" level: %d ", level); | |
| 89 | |
| 90 ResourceMark rm; | |
| 91 char *method_name = mh->name_and_sig_as_C_string(); | |
| 92 tty->print("[%s", method_name); | |
| 93 if (inlinee_event) { | |
| 94 char *inlinee_name = imh->name_and_sig_as_C_string(); | |
| 95 tty->print(" [%s]] ", inlinee_name); | |
| 96 } | |
| 97 else tty->print("] "); | |
| 98 tty->print("@%d queues: %d,%d", bci, CompileBroker::queue_size(CompLevel_full_profile), | |
| 99 CompileBroker::queue_size(CompLevel_full_optimization)); | |
| 100 | |
| 101 print_specific(type, mh, imh, bci, level); | |
| 102 | |
| 103 if (type != COMPILE) { | |
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104 print_counters("", mh); |
| 1783 | 105 if (inlinee_event) { |
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106 print_counters("inlinee ", imh); |
| 1783 | 107 } |
| 108 tty->print(" compilable: "); | |
| 109 bool need_comma = false; | |
| 110 if (!mh->is_not_compilable(CompLevel_full_profile)) { | |
| 111 tty->print("c1"); | |
| 112 need_comma = true; | |
| 113 } | |
| 114 if (!mh->is_not_compilable(CompLevel_full_optimization)) { | |
| 115 if (need_comma) tty->print(", "); | |
| 116 tty->print("c2"); | |
| 117 need_comma = true; | |
| 118 } | |
| 119 if (!mh->is_not_osr_compilable()) { | |
| 120 if (need_comma) tty->print(", "); | |
| 121 tty->print("osr"); | |
| 122 } | |
| 123 tty->print(" status:"); | |
| 124 if (mh->queued_for_compilation()) { | |
| 125 tty->print(" in queue"); | |
| 126 } else tty->print(" idle"); | |
| 127 } | |
| 128 tty->print_cr("]"); | |
| 129 } | |
| 130 | |
| 131 void SimpleThresholdPolicy::initialize() { | |
| 132 if (FLAG_IS_DEFAULT(CICompilerCount)) { | |
| 133 FLAG_SET_DEFAULT(CICompilerCount, 3); | |
| 134 } | |
| 135 int count = CICompilerCount; | |
| 136 if (CICompilerCountPerCPU) { | |
| 137 count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2; | |
| 138 } | |
| 139 set_c1_count(MAX2(count / 3, 1)); | |
| 140 set_c2_count(MAX2(count - count / 3, 1)); | |
| 141 } | |
| 142 | |
| 143 void SimpleThresholdPolicy::set_carry_if_necessary(InvocationCounter *counter) { | |
| 144 if (!counter->carry() && counter->count() > InvocationCounter::count_limit / 2) { | |
| 145 counter->set_carry_flag(); | |
| 146 } | |
| 147 } | |
| 148 | |
| 149 // Set carry flags on the counters if necessary | |
| 150 void SimpleThresholdPolicy::handle_counter_overflow(methodOop method) { | |
| 151 set_carry_if_necessary(method->invocation_counter()); | |
| 152 set_carry_if_necessary(method->backedge_counter()); | |
| 153 methodDataOop mdo = method->method_data(); | |
| 154 if (mdo != NULL) { | |
| 155 set_carry_if_necessary(mdo->invocation_counter()); | |
| 156 set_carry_if_necessary(mdo->backedge_counter()); | |
| 157 } | |
| 158 } | |
| 159 | |
| 160 // Called with the queue locked and with at least one element | |
| 161 CompileTask* SimpleThresholdPolicy::select_task(CompileQueue* compile_queue) { | |
| 162 return compile_queue->first(); | |
| 163 } | |
| 164 | |
| 2252 | 165 void SimpleThresholdPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { |
| 166 for (ScopeDesc* sd = trap_scope;; sd = sd->sender()) { | |
| 167 if (PrintTieredEvents) { | |
| 168 methodHandle mh(sd->method()); | |
| 169 print_event(REPROFILE, mh, mh, InvocationEntryBci, CompLevel_none); | |
| 170 } | |
| 171 methodDataOop mdo = sd->method()->method_data(); | |
| 172 if (mdo != NULL) { | |
| 173 mdo->reset_start_counters(); | |
| 174 } | |
| 175 if (sd->is_top()) break; | |
| 176 } | |
| 177 } | |
| 178 | |
| 1783 | 179 nmethod* SimpleThresholdPolicy::event(methodHandle method, methodHandle inlinee, |
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180 int branch_bci, int bci, CompLevel comp_level, nmethod* nm, TRAPS) { |
| 1783 | 181 if (comp_level == CompLevel_none && |
| 182 JvmtiExport::can_post_interpreter_events()) { | |
| 183 assert(THREAD->is_Java_thread(), "Should be java thread"); | |
| 184 if (((JavaThread*)THREAD)->is_interp_only_mode()) { | |
| 185 return NULL; | |
| 186 } | |
| 187 } | |
| 188 nmethod *osr_nm = NULL; | |
| 189 | |
| 190 handle_counter_overflow(method()); | |
| 191 if (method() != inlinee()) { | |
| 192 handle_counter_overflow(inlinee()); | |
| 193 } | |
| 194 | |
| 195 if (PrintTieredEvents) { | |
| 196 print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level); | |
| 197 } | |
| 198 | |
| 199 if (bci == InvocationEntryBci) { | |
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200 method_invocation_event(method, inlinee, comp_level, nm, THREAD); |
| 1783 | 201 } else { |
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202 method_back_branch_event(method, inlinee, bci, comp_level, nm, THREAD); |
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203 // method == inlinee if the event originated in the main method |
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204 int highest_level = inlinee->highest_osr_comp_level(); |
| 1783 | 205 if (highest_level > comp_level) { |
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206 osr_nm = inlinee->lookup_osr_nmethod_for(bci, highest_level, false); |
| 1783 | 207 } |
| 208 } | |
| 209 return osr_nm; | |
| 210 } | |
| 211 | |
| 212 // Check if the method can be compiled, change level if necessary | |
| 213 void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, TRAPS) { | |
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214 assert(level <= TieredStopAtLevel, "Invalid compilation level"); |
| 1783 | 215 if (level == CompLevel_none) { |
| 216 return; | |
| 217 } | |
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218 // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling |
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219 // in the interpreter and then compile with C2 (the transition function will request that, |
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220 // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with |
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221 // pure C1. |
| 1783 | 222 if (!can_be_compiled(mh, level)) { |
| 223 if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) { | |
| 224 compile(mh, bci, CompLevel_simple, THREAD); | |
| 225 } | |
| 226 return; | |
| 227 } | |
| 228 if (bci != InvocationEntryBci && mh->is_not_osr_compilable()) { | |
| 229 return; | |
| 230 } | |
| 231 if (!CompileBroker::compilation_is_in_queue(mh, bci)) { | |
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232 if (PrintTieredEvents) { |
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233 print_event(COMPILE, mh, mh, bci, level); |
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234 } |
| 1783 | 235 submit_compile(mh, bci, level, THREAD); |
| 236 } | |
| 237 } | |
| 238 | |
| 239 // Tell the broker to compile the method | |
| 240 void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, TRAPS) { | |
| 241 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); | |
| 242 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", THREAD); | |
| 243 } | |
| 244 | |
| 245 // Call and loop predicates determine whether a transition to a higher | |
| 246 // compilation level should be performed (pointers to predicate functions | |
| 247 // are passed to common() transition function). | |
| 248 bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) { | |
| 249 switch(cur_level) { | |
| 250 case CompLevel_none: | |
| 251 case CompLevel_limited_profile: { | |
| 252 return loop_predicate_helper<CompLevel_none>(i, b, 1.0); | |
| 253 } | |
| 254 case CompLevel_full_profile: { | |
| 255 return loop_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
| 256 } | |
| 257 default: | |
| 258 return true; | |
| 259 } | |
| 260 } | |
| 261 | |
| 262 bool SimpleThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) { | |
| 263 switch(cur_level) { | |
| 264 case CompLevel_none: | |
| 265 case CompLevel_limited_profile: { | |
| 266 return call_predicate_helper<CompLevel_none>(i, b, 1.0); | |
| 267 } | |
| 268 case CompLevel_full_profile: { | |
| 269 return call_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
| 270 } | |
| 271 default: | |
| 272 return true; | |
| 273 } | |
| 274 } | |
| 275 | |
| 276 // Determine is a method is mature. | |
| 277 bool SimpleThresholdPolicy::is_mature(methodOop method) { | |
| 278 if (is_trivial(method)) return true; | |
| 279 methodDataOop mdo = method->method_data(); | |
| 280 if (mdo != NULL) { | |
| 281 int i = mdo->invocation_count(); | |
| 282 int b = mdo->backedge_count(); | |
| 283 double k = ProfileMaturityPercentage / 100.0; | |
| 284 return call_predicate_helper<CompLevel_full_profile>(i, b, k) || | |
| 285 loop_predicate_helper<CompLevel_full_profile>(i, b, k); | |
| 286 } | |
| 287 return false; | |
| 288 } | |
| 289 | |
| 290 // Common transition function. Given a predicate determines if a method should transition to another level. | |
| 291 CompLevel SimpleThresholdPolicy::common(Predicate p, methodOop method, CompLevel cur_level) { | |
| 292 CompLevel next_level = cur_level; | |
| 293 int i = method->invocation_count(); | |
| 294 int b = method->backedge_count(); | |
| 295 | |
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296 if (is_trivial(method)) { |
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297 next_level = CompLevel_simple; |
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298 } else { |
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299 switch(cur_level) { |
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300 case CompLevel_none: |
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301 // If we were at full profile level, would we switch to full opt? |
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302 if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) { |
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303 next_level = CompLevel_full_optimization; |
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304 } else if ((this->*p)(i, b, cur_level)) { |
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305 next_level = CompLevel_full_profile; |
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306 } |
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307 break; |
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308 case CompLevel_limited_profile: |
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309 case CompLevel_full_profile: |
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310 { |
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311 methodDataOop mdo = method->method_data(); |
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312 if (mdo != NULL) { |
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313 if (mdo->would_profile()) { |
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314 int mdo_i = mdo->invocation_count_delta(); |
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315 int mdo_b = mdo->backedge_count_delta(); |
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316 if ((this->*p)(mdo_i, mdo_b, cur_level)) { |
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317 next_level = CompLevel_full_optimization; |
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318 } |
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319 } else { |
| 2252 | 320 next_level = CompLevel_full_optimization; |
| 321 } | |
| 1783 | 322 } |
| 323 } | |
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324 break; |
| 1783 | 325 } |
| 326 } | |
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327 return MIN2(next_level, (CompLevel)TieredStopAtLevel); |
| 1783 | 328 } |
| 329 | |
| 330 // Determine if a method should be compiled with a normal entry point at a different level. | |
| 331 CompLevel SimpleThresholdPolicy::call_event(methodOop method, CompLevel cur_level) { | |
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332 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
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333 common(&SimpleThresholdPolicy::loop_predicate, method, cur_level)); |
| 1783 | 334 CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level); |
| 335 | |
| 336 // If OSR method level is greater than the regular method level, the levels should be | |
| 337 // equalized by raising the regular method level in order to avoid OSRs during each | |
| 338 // invocation of the method. | |
| 339 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { | |
| 340 methodDataOop mdo = method->method_data(); | |
| 341 guarantee(mdo != NULL, "MDO should not be NULL"); | |
| 342 if (mdo->invocation_count() >= 1) { | |
| 343 next_level = CompLevel_full_optimization; | |
| 344 } | |
| 345 } else { | |
| 346 next_level = MAX2(osr_level, next_level); | |
| 347 } | |
| 348 | |
| 349 return next_level; | |
| 350 } | |
| 351 | |
| 352 // Determine if we should do an OSR compilation of a given method. | |
| 353 CompLevel SimpleThresholdPolicy::loop_event(methodOop method, CompLevel cur_level) { | |
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354 CompLevel next_level = common(&SimpleThresholdPolicy::loop_predicate, method, cur_level); |
| 1783 | 355 if (cur_level == CompLevel_none) { |
| 356 // If there is a live OSR method that means that we deopted to the interpreter | |
| 357 // for the transition. | |
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358 CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
| 1783 | 359 if (osr_level > CompLevel_none) { |
| 360 return osr_level; | |
| 361 } | |
| 362 } | |
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363 return next_level; |
| 1783 | 364 } |
| 365 | |
| 366 | |
| 367 // Handle the invocation event. | |
| 368 void SimpleThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh, | |
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369 CompLevel level, nmethod* nm, TRAPS) { |
| 1783 | 370 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, InvocationEntryBci)) { |
| 371 CompLevel next_level = call_event(mh(), level); | |
| 372 if (next_level != level) { | |
| 373 compile(mh, InvocationEntryBci, next_level, THREAD); | |
| 374 } | |
| 375 } | |
| 376 } | |
| 377 | |
| 378 // Handle the back branch event. Notice that we can compile the method | |
| 379 // with a regular entry from here. | |
| 380 void SimpleThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh, | |
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381 int bci, CompLevel level, nmethod* nm, TRAPS) { |
| 1783 | 382 // If the method is already compiling, quickly bail out. |
| 383 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, bci)) { | |
| 384 // Use loop event as an opportinity to also check there's been | |
| 385 // enough calls. | |
| 386 CompLevel cur_level = comp_level(mh()); | |
| 387 CompLevel next_level = call_event(mh(), cur_level); | |
| 388 CompLevel next_osr_level = loop_event(mh(), level); | |
| 389 | |
| 390 next_level = MAX2(next_level, | |
| 391 next_osr_level < CompLevel_full_optimization ? next_osr_level : cur_level); | |
| 392 bool is_compiling = false; | |
| 393 if (next_level != cur_level) { | |
| 394 compile(mh, InvocationEntryBci, next_level, THREAD); | |
| 395 is_compiling = true; | |
| 396 } | |
| 397 | |
| 398 // Do the OSR version | |
| 399 if (!is_compiling && next_osr_level != level) { | |
| 400 compile(mh, bci, next_osr_level, THREAD); | |
| 401 } | |
| 402 } | |
| 403 } |