Mercurial > hg > truffle
annotate src/share/vm/runtime/simpleThresholdPolicy.cpp @ 3790:6f6e91603a45
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
Summary: Take into account current state of profiling before believing that existing higher level versions are valid
Reviewed-by: kvn, never
| author | iveresov |
|---|---|
| date | Fri, 01 Jul 2011 10:35:54 -0700 |
| parents | 97b64f73103b |
| children | 2c359f27615c |
| 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 |
| 33 // Print an event. | |
| 34 void SimpleThresholdPolicy::print_event(EventType type, methodHandle mh, methodHandle imh, | |
| 35 int bci, CompLevel level) { | |
| 36 bool inlinee_event = mh() != imh(); | |
| 37 | |
| 38 ttyLocker tty_lock; | |
| 39 tty->print("%lf: [", os::elapsedTime()); | |
| 40 | |
| 41 int invocation_count = mh->invocation_count(); | |
| 42 int backedge_count = mh->backedge_count(); | |
| 43 switch(type) { | |
| 44 case CALL: | |
| 45 tty->print("call"); | |
| 46 break; | |
| 47 case LOOP: | |
| 48 tty->print("loop"); | |
| 49 break; | |
| 50 case COMPILE: | |
| 51 tty->print("compile"); | |
| 2252 | 52 break; |
| 53 case KILL: | |
| 54 tty->print("kill"); | |
| 55 break; | |
| 56 case UPDATE: | |
| 57 tty->print("update"); | |
| 58 break; | |
| 59 case REPROFILE: | |
| 60 tty->print("reprofile"); | |
| 61 break; | |
| 62 default: | |
| 63 tty->print("unknown"); | |
| 1783 | 64 } |
| 65 | |
| 66 tty->print(" level: %d ", level); | |
| 67 | |
| 68 ResourceMark rm; | |
| 69 char *method_name = mh->name_and_sig_as_C_string(); | |
| 70 tty->print("[%s", method_name); | |
| 71 // We can have an inlinee, although currently we don't generate any notifications for the inlined methods. | |
| 72 if (inlinee_event) { | |
| 73 char *inlinee_name = imh->name_and_sig_as_C_string(); | |
| 74 tty->print(" [%s]] ", inlinee_name); | |
| 75 } | |
| 76 else tty->print("] "); | |
| 77 tty->print("@%d queues: %d,%d", bci, CompileBroker::queue_size(CompLevel_full_profile), | |
| 78 CompileBroker::queue_size(CompLevel_full_optimization)); | |
| 79 | |
| 80 print_specific(type, mh, imh, bci, level); | |
| 81 | |
| 82 if (type != COMPILE) { | |
| 83 methodDataHandle mdh = mh->method_data(); | |
| 84 int mdo_invocations = 0, mdo_backedges = 0; | |
| 2252 | 85 int mdo_invocations_start = 0, mdo_backedges_start = 0; |
| 1783 | 86 if (mdh() != NULL) { |
| 87 mdo_invocations = mdh->invocation_count(); | |
| 88 mdo_backedges = mdh->backedge_count(); | |
| 2252 | 89 mdo_invocations_start = mdh->invocation_count_start(); |
| 90 mdo_backedges_start = mdh->backedge_count_start(); | |
| 1783 | 91 } |
| 2252 | 92 tty->print(" total: %d,%d mdo: %d(%d),%d(%d)", |
| 1783 | 93 invocation_count, backedge_count, |
| 2252 | 94 mdo_invocations, mdo_invocations_start, |
| 95 mdo_backedges, mdo_backedges_start); | |
| 1783 | 96 tty->print(" max levels: %d,%d", |
| 97 mh->highest_comp_level(), mh->highest_osr_comp_level()); | |
| 98 if (inlinee_event) { | |
| 99 tty->print(" inlinee max levels: %d,%d", imh->highest_comp_level(), imh->highest_osr_comp_level()); | |
| 100 } | |
| 101 tty->print(" compilable: "); | |
| 102 bool need_comma = false; | |
| 103 if (!mh->is_not_compilable(CompLevel_full_profile)) { | |
| 104 tty->print("c1"); | |
| 105 need_comma = true; | |
| 106 } | |
| 107 if (!mh->is_not_compilable(CompLevel_full_optimization)) { | |
| 108 if (need_comma) tty->print(", "); | |
| 109 tty->print("c2"); | |
| 110 need_comma = true; | |
| 111 } | |
| 112 if (!mh->is_not_osr_compilable()) { | |
| 113 if (need_comma) tty->print(", "); | |
| 114 tty->print("osr"); | |
| 115 } | |
| 116 tty->print(" status:"); | |
| 117 if (mh->queued_for_compilation()) { | |
| 118 tty->print(" in queue"); | |
| 119 } else tty->print(" idle"); | |
| 120 } | |
| 121 tty->print_cr("]"); | |
| 122 } | |
| 123 | |
| 124 void SimpleThresholdPolicy::initialize() { | |
| 125 if (FLAG_IS_DEFAULT(CICompilerCount)) { | |
| 126 FLAG_SET_DEFAULT(CICompilerCount, 3); | |
| 127 } | |
| 128 int count = CICompilerCount; | |
| 129 if (CICompilerCountPerCPU) { | |
| 130 count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2; | |
| 131 } | |
| 132 set_c1_count(MAX2(count / 3, 1)); | |
| 133 set_c2_count(MAX2(count - count / 3, 1)); | |
| 134 } | |
| 135 | |
| 136 void SimpleThresholdPolicy::set_carry_if_necessary(InvocationCounter *counter) { | |
| 137 if (!counter->carry() && counter->count() > InvocationCounter::count_limit / 2) { | |
| 138 counter->set_carry_flag(); | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 // Set carry flags on the counters if necessary | |
| 143 void SimpleThresholdPolicy::handle_counter_overflow(methodOop method) { | |
| 144 set_carry_if_necessary(method->invocation_counter()); | |
| 145 set_carry_if_necessary(method->backedge_counter()); | |
| 146 methodDataOop mdo = method->method_data(); | |
| 147 if (mdo != NULL) { | |
| 148 set_carry_if_necessary(mdo->invocation_counter()); | |
| 149 set_carry_if_necessary(mdo->backedge_counter()); | |
| 150 } | |
| 151 } | |
| 152 | |
| 153 // Called with the queue locked and with at least one element | |
| 154 CompileTask* SimpleThresholdPolicy::select_task(CompileQueue* compile_queue) { | |
| 155 return compile_queue->first(); | |
| 156 } | |
| 157 | |
| 2252 | 158 void SimpleThresholdPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { |
| 159 for (ScopeDesc* sd = trap_scope;; sd = sd->sender()) { | |
| 160 if (PrintTieredEvents) { | |
| 161 methodHandle mh(sd->method()); | |
| 162 print_event(REPROFILE, mh, mh, InvocationEntryBci, CompLevel_none); | |
| 163 } | |
| 164 methodDataOop mdo = sd->method()->method_data(); | |
| 165 if (mdo != NULL) { | |
| 166 mdo->reset_start_counters(); | |
| 167 } | |
| 168 if (sd->is_top()) break; | |
| 169 } | |
| 170 } | |
| 171 | |
| 1783 | 172 nmethod* SimpleThresholdPolicy::event(methodHandle method, methodHandle inlinee, |
| 173 int branch_bci, int bci, CompLevel comp_level, TRAPS) { | |
| 174 if (comp_level == CompLevel_none && | |
| 175 JvmtiExport::can_post_interpreter_events()) { | |
| 176 assert(THREAD->is_Java_thread(), "Should be java thread"); | |
| 177 if (((JavaThread*)THREAD)->is_interp_only_mode()) { | |
| 178 return NULL; | |
| 179 } | |
| 180 } | |
| 181 nmethod *osr_nm = NULL; | |
| 182 | |
| 183 handle_counter_overflow(method()); | |
| 184 if (method() != inlinee()) { | |
| 185 handle_counter_overflow(inlinee()); | |
| 186 } | |
| 187 | |
| 188 if (PrintTieredEvents) { | |
| 189 print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level); | |
| 190 } | |
| 191 | |
| 192 if (bci == InvocationEntryBci) { | |
| 193 method_invocation_event(method, inlinee, comp_level, THREAD); | |
| 194 } else { | |
| 195 method_back_branch_event(method, inlinee, bci, comp_level, THREAD); | |
| 196 int highest_level = method->highest_osr_comp_level(); | |
| 197 if (highest_level > comp_level) { | |
| 198 osr_nm = method->lookup_osr_nmethod_for(bci, highest_level, false); | |
| 199 } | |
| 200 } | |
| 201 return osr_nm; | |
| 202 } | |
| 203 | |
| 204 // Check if the method can be compiled, change level if necessary | |
| 205 void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, TRAPS) { | |
| 206 // Take the given ceiling into the account. | |
| 207 // NOTE: You can set it to 1 to get a pure C1 version. | |
| 208 if ((CompLevel)TieredStopAtLevel < level) { | |
| 209 level = (CompLevel)TieredStopAtLevel; | |
| 210 } | |
| 211 if (level == CompLevel_none) { | |
| 212 return; | |
| 213 } | |
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214 // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling |
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215 // in the interpreter and then compile with C2 (the transition function will request that, |
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216 // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with |
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217 // pure C1. |
| 1783 | 218 if (!can_be_compiled(mh, level)) { |
| 219 if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) { | |
| 220 compile(mh, bci, CompLevel_simple, THREAD); | |
| 221 } | |
| 222 return; | |
| 223 } | |
| 224 if (bci != InvocationEntryBci && mh->is_not_osr_compilable()) { | |
| 225 return; | |
| 226 } | |
| 227 if (PrintTieredEvents) { | |
| 228 print_event(COMPILE, mh, mh, bci, level); | |
| 229 } | |
| 230 if (!CompileBroker::compilation_is_in_queue(mh, bci)) { | |
| 231 submit_compile(mh, bci, level, THREAD); | |
| 232 } | |
| 233 } | |
| 234 | |
| 235 // Tell the broker to compile the method | |
| 236 void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, TRAPS) { | |
| 237 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); | |
| 238 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", THREAD); | |
| 239 } | |
| 240 | |
| 241 // Call and loop predicates determine whether a transition to a higher | |
| 242 // compilation level should be performed (pointers to predicate functions | |
| 243 // are passed to common() transition function). | |
| 244 bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) { | |
| 245 switch(cur_level) { | |
| 246 case CompLevel_none: | |
| 247 case CompLevel_limited_profile: { | |
| 248 return loop_predicate_helper<CompLevel_none>(i, b, 1.0); | |
| 249 } | |
| 250 case CompLevel_full_profile: { | |
| 251 return loop_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
| 252 } | |
| 253 default: | |
| 254 return true; | |
| 255 } | |
| 256 } | |
| 257 | |
| 258 bool SimpleThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) { | |
| 259 switch(cur_level) { | |
| 260 case CompLevel_none: | |
| 261 case CompLevel_limited_profile: { | |
| 262 return call_predicate_helper<CompLevel_none>(i, b, 1.0); | |
| 263 } | |
| 264 case CompLevel_full_profile: { | |
| 265 return call_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
| 266 } | |
| 267 default: | |
| 268 return true; | |
| 269 } | |
| 270 } | |
| 271 | |
| 272 // Determine is a method is mature. | |
| 273 bool SimpleThresholdPolicy::is_mature(methodOop method) { | |
| 274 if (is_trivial(method)) return true; | |
| 275 methodDataOop mdo = method->method_data(); | |
| 276 if (mdo != NULL) { | |
| 277 int i = mdo->invocation_count(); | |
| 278 int b = mdo->backedge_count(); | |
| 279 double k = ProfileMaturityPercentage / 100.0; | |
| 280 return call_predicate_helper<CompLevel_full_profile>(i, b, k) || | |
| 281 loop_predicate_helper<CompLevel_full_profile>(i, b, k); | |
| 282 } | |
| 283 return false; | |
| 284 } | |
| 285 | |
| 286 // Common transition function. Given a predicate determines if a method should transition to another level. | |
| 287 CompLevel SimpleThresholdPolicy::common(Predicate p, methodOop method, CompLevel cur_level) { | |
| 2252 | 288 if (is_trivial(method)) return CompLevel_simple; |
| 289 | |
| 1783 | 290 CompLevel next_level = cur_level; |
| 291 int i = method->invocation_count(); | |
| 292 int b = method->backedge_count(); | |
| 293 | |
| 294 switch(cur_level) { | |
| 295 case CompLevel_none: | |
| 2252 | 296 // If we were at full profile level, would we switch to full opt? |
| 297 if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) { | |
| 298 next_level = CompLevel_full_optimization; | |
| 299 } else if ((this->*p)(i, b, cur_level)) { | |
| 300 next_level = CompLevel_full_profile; | |
| 1783 | 301 } |
| 302 break; | |
| 303 case CompLevel_limited_profile: | |
| 304 case CompLevel_full_profile: | |
| 2252 | 305 { |
| 1783 | 306 methodDataOop mdo = method->method_data(); |
| 2252 | 307 if (mdo != NULL) { |
| 308 if (mdo->would_profile()) { | |
| 309 int mdo_i = mdo->invocation_count_delta(); | |
| 310 int mdo_b = mdo->backedge_count_delta(); | |
| 311 if ((this->*p)(mdo_i, mdo_b, cur_level)) { | |
| 312 next_level = CompLevel_full_optimization; | |
| 313 } | |
| 314 } else { | |
| 1783 | 315 next_level = CompLevel_full_optimization; |
| 316 } | |
| 317 } | |
| 318 } | |
| 319 break; | |
| 320 } | |
| 321 return next_level; | |
| 322 } | |
| 323 | |
| 324 // Determine if a method should be compiled with a normal entry point at a different level. | |
| 325 CompLevel SimpleThresholdPolicy::call_event(methodOop method, CompLevel cur_level) { | |
|
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6f6e91603a45
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
3358
diff
changeset
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326 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
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6f6e91603a45
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
3358
diff
changeset
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327 common(&SimpleThresholdPolicy::loop_predicate, method, cur_level)); |
| 1783 | 328 CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level); |
| 329 | |
| 330 // If OSR method level is greater than the regular method level, the levels should be | |
| 331 // equalized by raising the regular method level in order to avoid OSRs during each | |
| 332 // invocation of the method. | |
| 333 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { | |
| 334 methodDataOop mdo = method->method_data(); | |
| 335 guarantee(mdo != NULL, "MDO should not be NULL"); | |
| 336 if (mdo->invocation_count() >= 1) { | |
| 337 next_level = CompLevel_full_optimization; | |
| 338 } | |
| 339 } else { | |
| 340 next_level = MAX2(osr_level, next_level); | |
| 341 } | |
| 342 | |
| 343 return next_level; | |
| 344 } | |
| 345 | |
| 346 // Determine if we should do an OSR compilation of a given method. | |
| 347 CompLevel SimpleThresholdPolicy::loop_event(methodOop method, CompLevel cur_level) { | |
|
3790
6f6e91603a45
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
3358
diff
changeset
|
348 CompLevel next_level = common(&SimpleThresholdPolicy::loop_predicate, method, cur_level); |
| 1783 | 349 if (cur_level == CompLevel_none) { |
| 350 // If there is a live OSR method that means that we deopted to the interpreter | |
| 351 // for the transition. | |
|
3790
6f6e91603a45
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
3358
diff
changeset
|
352 CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
| 1783 | 353 if (osr_level > CompLevel_none) { |
| 354 return osr_level; | |
| 355 } | |
| 356 } | |
|
3790
6f6e91603a45
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
3358
diff
changeset
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357 return next_level; |
| 1783 | 358 } |
| 359 | |
| 360 | |
| 361 // Handle the invocation event. | |
| 362 void SimpleThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh, | |
| 363 CompLevel level, TRAPS) { | |
| 364 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, InvocationEntryBci)) { | |
| 365 CompLevel next_level = call_event(mh(), level); | |
| 366 if (next_level != level) { | |
| 367 compile(mh, InvocationEntryBci, next_level, THREAD); | |
| 368 } | |
| 369 } | |
| 370 } | |
| 371 | |
| 372 // Handle the back branch event. Notice that we can compile the method | |
| 373 // with a regular entry from here. | |
| 374 void SimpleThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh, | |
| 375 int bci, CompLevel level, TRAPS) { | |
| 376 // If the method is already compiling, quickly bail out. | |
| 377 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, bci)) { | |
| 378 // Use loop event as an opportinity to also check there's been | |
| 379 // enough calls. | |
| 380 CompLevel cur_level = comp_level(mh()); | |
| 381 CompLevel next_level = call_event(mh(), cur_level); | |
| 382 CompLevel next_osr_level = loop_event(mh(), level); | |
| 383 | |
| 384 next_level = MAX2(next_level, | |
| 385 next_osr_level < CompLevel_full_optimization ? next_osr_level : cur_level); | |
| 386 bool is_compiling = false; | |
| 387 if (next_level != cur_level) { | |
| 388 compile(mh, InvocationEntryBci, next_level, THREAD); | |
| 389 is_compiling = true; | |
| 390 } | |
| 391 | |
| 392 // Do the OSR version | |
| 393 if (!is_compiling && next_osr_level != level) { | |
| 394 compile(mh, bci, next_osr_level, THREAD); | |
| 395 } | |
| 396 } | |
| 397 } |