Mercurial > hg > truffle
annotate src/share/vm/runtime/simpleThresholdPolicy.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 20334ed5ed3c |
| children | 9191895df19d |
| rev | line source |
|---|---|
| 1783 | 1 /* |
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2 * Copyright (c) 2010, 2012, 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 MethodData* 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 | |
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150 void SimpleThresholdPolicy::handle_counter_overflow(Method* method) { |
| 1783 | 151 set_carry_if_necessary(method->invocation_counter()); |
| 152 set_carry_if_necessary(method->backedge_counter()); | |
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153 MethodData* mdo = method->method_data(); |
| 1783 | 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 } | |
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171 MethodData* mdo = sd->method()->method_data(); |
| 2252 | 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, JavaThread* thread) { |
| 1783 | 181 if (comp_level == CompLevel_none && |
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182 JvmtiExport::can_post_interpreter_events() && |
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183 thread->is_interp_only_mode()) { |
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184 return NULL; |
| 1783 | 185 } |
| 186 nmethod *osr_nm = NULL; | |
| 187 | |
| 188 handle_counter_overflow(method()); | |
| 189 if (method() != inlinee()) { | |
| 190 handle_counter_overflow(inlinee()); | |
| 191 } | |
| 192 | |
| 193 if (PrintTieredEvents) { | |
| 194 print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level); | |
| 195 } | |
| 196 | |
| 197 if (bci == InvocationEntryBci) { | |
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198 method_invocation_event(method, inlinee, comp_level, nm, thread); |
| 1783 | 199 } else { |
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200 method_back_branch_event(method, inlinee, bci, comp_level, nm, thread); |
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201 // method == inlinee if the event originated in the main method |
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202 int highest_level = inlinee->highest_osr_comp_level(); |
| 1783 | 203 if (highest_level > comp_level) { |
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204 osr_nm = inlinee->lookup_osr_nmethod_for(bci, highest_level, false); |
| 1783 | 205 } |
| 206 } | |
| 207 return osr_nm; | |
| 208 } | |
| 209 | |
| 210 // Check if the method can be compiled, change level if necessary | |
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211 void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
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212 assert(level <= TieredStopAtLevel, "Invalid compilation level"); |
| 1783 | 213 if (level == CompLevel_none) { |
| 214 return; | |
| 215 } | |
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216 // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling |
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217 // in the interpreter and then compile with C2 (the transition function will request that, |
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218 // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with |
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219 // pure C1. |
| 1783 | 220 if (!can_be_compiled(mh, level)) { |
| 221 if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) { | |
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222 compile(mh, bci, CompLevel_simple, thread); |
| 1783 | 223 } |
| 224 return; | |
| 225 } | |
| 226 if (bci != InvocationEntryBci && mh->is_not_osr_compilable()) { | |
| 227 return; | |
| 228 } | |
| 229 if (!CompileBroker::compilation_is_in_queue(mh, bci)) { | |
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230 if (PrintTieredEvents) { |
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231 print_event(COMPILE, mh, mh, bci, level); |
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232 } |
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233 submit_compile(mh, bci, level, thread); |
| 1783 | 234 } |
| 235 } | |
| 236 | |
| 237 // Tell the broker to compile the method | |
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238 void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
| 1783 | 239 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); |
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240 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", thread); |
| 1783 | 241 } |
| 242 | |
| 243 // Call and loop predicates determine whether a transition to a higher | |
| 244 // compilation level should be performed (pointers to predicate functions | |
| 245 // are passed to common() transition function). | |
| 246 bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) { | |
| 247 switch(cur_level) { | |
| 248 case CompLevel_none: | |
| 249 case CompLevel_limited_profile: { | |
| 250 return loop_predicate_helper<CompLevel_none>(i, b, 1.0); | |
| 251 } | |
| 252 case CompLevel_full_profile: { | |
| 253 return loop_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
| 254 } | |
| 255 default: | |
| 256 return true; | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 bool SimpleThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) { | |
| 261 switch(cur_level) { | |
| 262 case CompLevel_none: | |
| 263 case CompLevel_limited_profile: { | |
| 264 return call_predicate_helper<CompLevel_none>(i, b, 1.0); | |
| 265 } | |
| 266 case CompLevel_full_profile: { | |
| 267 return call_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
| 268 } | |
| 269 default: | |
| 270 return true; | |
| 271 } | |
| 272 } | |
| 273 | |
| 274 // Determine is a method is mature. | |
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275 bool SimpleThresholdPolicy::is_mature(Method* method) { |
| 1783 | 276 if (is_trivial(method)) return true; |
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277 MethodData* mdo = method->method_data(); |
| 1783 | 278 if (mdo != NULL) { |
| 279 int i = mdo->invocation_count(); | |
| 280 int b = mdo->backedge_count(); | |
| 281 double k = ProfileMaturityPercentage / 100.0; | |
| 282 return call_predicate_helper<CompLevel_full_profile>(i, b, k) || | |
| 283 loop_predicate_helper<CompLevel_full_profile>(i, b, k); | |
| 284 } | |
| 285 return false; | |
| 286 } | |
| 287 | |
| 288 // Common transition function. Given a predicate determines if a method should transition to another level. | |
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289 CompLevel SimpleThresholdPolicy::common(Predicate p, Method* method, CompLevel cur_level) { |
| 1783 | 290 CompLevel next_level = cur_level; |
| 291 int i = method->invocation_count(); | |
| 292 int b = method->backedge_count(); | |
| 293 | |
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294 if (is_trivial(method)) { |
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295 next_level = CompLevel_simple; |
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296 } else { |
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297 switch(cur_level) { |
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298 case CompLevel_none: |
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299 // If we were at full profile level, would we switch to full opt? |
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300 if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) { |
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301 next_level = CompLevel_full_optimization; |
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302 } else if ((this->*p)(i, b, cur_level)) { |
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303 next_level = CompLevel_full_profile; |
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304 } |
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305 break; |
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306 case CompLevel_limited_profile: |
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307 case CompLevel_full_profile: |
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308 { |
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309 MethodData* mdo = method->method_data(); |
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310 if (mdo != NULL) { |
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311 if (mdo->would_profile()) { |
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312 int mdo_i = mdo->invocation_count_delta(); |
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313 int mdo_b = mdo->backedge_count_delta(); |
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314 if ((this->*p)(mdo_i, mdo_b, cur_level)) { |
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315 next_level = CompLevel_full_optimization; |
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316 } |
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317 } else { |
| 2252 | 318 next_level = CompLevel_full_optimization; |
| 319 } | |
| 1783 | 320 } |
| 321 } | |
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322 break; |
| 1783 | 323 } |
| 324 } | |
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325 return MIN2(next_level, (CompLevel)TieredStopAtLevel); |
| 1783 | 326 } |
| 327 | |
| 328 // Determine if a method should be compiled with a normal entry point at a different level. | |
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329 CompLevel SimpleThresholdPolicy::call_event(Method* method, CompLevel cur_level) { |
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330 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
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331 common(&SimpleThresholdPolicy::loop_predicate, method, cur_level)); |
| 1783 | 332 CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level); |
| 333 | |
| 334 // If OSR method level is greater than the regular method level, the levels should be | |
| 335 // equalized by raising the regular method level in order to avoid OSRs during each | |
| 336 // invocation of the method. | |
| 337 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { | |
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338 MethodData* mdo = method->method_data(); |
| 1783 | 339 guarantee(mdo != NULL, "MDO should not be NULL"); |
| 340 if (mdo->invocation_count() >= 1) { | |
| 341 next_level = CompLevel_full_optimization; | |
| 342 } | |
| 343 } else { | |
| 344 next_level = MAX2(osr_level, next_level); | |
| 345 } | |
| 346 | |
| 347 return next_level; | |
| 348 } | |
| 349 | |
| 350 // Determine if we should do an OSR compilation of a given method. | |
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351 CompLevel SimpleThresholdPolicy::loop_event(Method* method, CompLevel cur_level) { |
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352 CompLevel next_level = common(&SimpleThresholdPolicy::loop_predicate, method, cur_level); |
| 1783 | 353 if (cur_level == CompLevel_none) { |
| 354 // If there is a live OSR method that means that we deopted to the interpreter | |
| 355 // for the transition. | |
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356 CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
| 1783 | 357 if (osr_level > CompLevel_none) { |
| 358 return osr_level; | |
| 359 } | |
| 360 } | |
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361 return next_level; |
| 1783 | 362 } |
| 363 | |
| 364 | |
| 365 // Handle the invocation event. | |
| 366 void SimpleThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh, | |
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367 CompLevel level, nmethod* nm, JavaThread* thread) { |
| 1783 | 368 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, InvocationEntryBci)) { |
| 369 CompLevel next_level = call_event(mh(), level); | |
| 370 if (next_level != level) { | |
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371 compile(mh, InvocationEntryBci, next_level, thread); |
| 1783 | 372 } |
| 373 } | |
| 374 } | |
| 375 | |
| 376 // Handle the back branch event. Notice that we can compile the method | |
| 377 // with a regular entry from here. | |
| 378 void SimpleThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh, | |
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379 int bci, CompLevel level, nmethod* nm, JavaThread* thread) { |
| 1783 | 380 // If the method is already compiling, quickly bail out. |
| 381 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, bci)) { | |
| 382 // Use loop event as an opportinity to also check there's been | |
| 383 // enough calls. | |
| 384 CompLevel cur_level = comp_level(mh()); | |
| 385 CompLevel next_level = call_event(mh(), cur_level); | |
| 386 CompLevel next_osr_level = loop_event(mh(), level); | |
| 387 | |
| 388 next_level = MAX2(next_level, | |
| 389 next_osr_level < CompLevel_full_optimization ? next_osr_level : cur_level); | |
| 390 bool is_compiling = false; | |
| 391 if (next_level != cur_level) { | |
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392 compile(mh, InvocationEntryBci, next_level, thread); |
| 1783 | 393 is_compiling = true; |
| 394 } | |
| 395 | |
| 396 // Do the OSR version | |
| 397 if (!is_compiling && next_osr_level != level) { | |
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398 compile(mh, bci, next_osr_level, thread); |
| 1783 | 399 } |
| 400 } | |
| 401 } |