Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/simpleThresholdPolicy.cpp @ 10105:aeaca88565e6
8010862: The Method counter fields used for profiling can be allocated lazily.
Summary: Allocate the method's profiling related metadata until they are needed.
Reviewed-by: coleenp, roland
| author | jiangli |
|---|---|
| date | Tue, 09 Apr 2013 17:17:41 -0400 |
| parents | 9191895df19d |
| children | 487d442ef257 |
| rev | line source |
|---|---|
| 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" |
| 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 | |
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88 tty->print(" level=%d ", level); |
| 1783 | 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("] "); | |
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98 tty->print("@%d queues=%d,%d", bci, CompileBroker::queue_size(CompLevel_full_profile), |
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99 CompileBroker::queue_size(CompLevel_full_optimization)); |
| 1783 | 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 } |
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108 tty->print(" compilable="); |
| 1783 | 109 bool need_comma = false; |
| 110 if (!mh->is_not_compilable(CompLevel_full_profile)) { | |
| 111 tty->print("c1"); | |
| 112 need_comma = true; | |
| 113 } | |
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114 if (!mh->is_not_osr_compilable(CompLevel_full_profile)) { |
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115 if (need_comma) tty->print(","); |
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116 tty->print("c1-osr"); |
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117 need_comma = true; |
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118 } |
| 1783 | 119 if (!mh->is_not_compilable(CompLevel_full_optimization)) { |
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120 if (need_comma) tty->print(","); |
| 1783 | 121 tty->print("c2"); |
| 122 need_comma = true; | |
| 123 } | |
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124 if (!mh->is_not_osr_compilable(CompLevel_full_optimization)) { |
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125 if (need_comma) tty->print(","); |
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126 tty->print("c2-osr"); |
| 1783 | 127 } |
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128 tty->print(" status="); |
| 1783 | 129 if (mh->queued_for_compilation()) { |
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130 tty->print("in-queue"); |
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131 } else tty->print("idle"); |
| 1783 | 132 } |
| 133 tty->print_cr("]"); | |
| 134 } | |
| 135 | |
| 136 void SimpleThresholdPolicy::initialize() { | |
| 137 if (FLAG_IS_DEFAULT(CICompilerCount)) { | |
| 138 FLAG_SET_DEFAULT(CICompilerCount, 3); | |
| 139 } | |
| 140 int count = CICompilerCount; | |
| 141 if (CICompilerCountPerCPU) { | |
| 142 count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2; | |
| 143 } | |
| 144 set_c1_count(MAX2(count / 3, 1)); | |
| 145 set_c2_count(MAX2(count - count / 3, 1)); | |
| 146 } | |
| 147 | |
| 148 void SimpleThresholdPolicy::set_carry_if_necessary(InvocationCounter *counter) { | |
| 149 if (!counter->carry() && counter->count() > InvocationCounter::count_limit / 2) { | |
| 150 counter->set_carry_flag(); | |
| 151 } | |
| 152 } | |
| 153 | |
| 154 // Set carry flags on the counters if necessary | |
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155 void SimpleThresholdPolicy::handle_counter_overflow(Method* method) { |
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156 MethodCounters *mcs = method->method_counters(); |
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157 assert(mcs != NULL, ""); |
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158 set_carry_if_necessary(mcs->invocation_counter()); |
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159 set_carry_if_necessary(mcs->backedge_counter()); |
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160 MethodData* mdo = method->method_data(); |
| 1783 | 161 if (mdo != NULL) { |
| 162 set_carry_if_necessary(mdo->invocation_counter()); | |
| 163 set_carry_if_necessary(mdo->backedge_counter()); | |
| 164 } | |
| 165 } | |
| 166 | |
| 167 // Called with the queue locked and with at least one element | |
| 168 CompileTask* SimpleThresholdPolicy::select_task(CompileQueue* compile_queue) { | |
| 169 return compile_queue->first(); | |
| 170 } | |
| 171 | |
| 2252 | 172 void SimpleThresholdPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { |
| 173 for (ScopeDesc* sd = trap_scope;; sd = sd->sender()) { | |
| 174 if (PrintTieredEvents) { | |
| 175 methodHandle mh(sd->method()); | |
| 176 print_event(REPROFILE, mh, mh, InvocationEntryBci, CompLevel_none); | |
| 177 } | |
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178 MethodData* mdo = sd->method()->method_data(); |
| 2252 | 179 if (mdo != NULL) { |
| 180 mdo->reset_start_counters(); | |
| 181 } | |
| 182 if (sd->is_top()) break; | |
| 183 } | |
| 184 } | |
| 185 | |
| 1783 | 186 nmethod* SimpleThresholdPolicy::event(methodHandle method, methodHandle inlinee, |
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187 int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) { |
| 1783 | 188 if (comp_level == CompLevel_none && |
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189 JvmtiExport::can_post_interpreter_events() && |
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190 thread->is_interp_only_mode()) { |
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191 return NULL; |
| 1783 | 192 } |
| 193 nmethod *osr_nm = NULL; | |
| 194 | |
| 195 handle_counter_overflow(method()); | |
| 196 if (method() != inlinee()) { | |
| 197 handle_counter_overflow(inlinee()); | |
| 198 } | |
| 199 | |
| 200 if (PrintTieredEvents) { | |
| 201 print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level); | |
| 202 } | |
| 203 | |
| 204 if (bci == InvocationEntryBci) { | |
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205 method_invocation_event(method, inlinee, comp_level, nm, thread); |
| 1783 | 206 } else { |
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207 method_back_branch_event(method, inlinee, bci, comp_level, nm, thread); |
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208 // method == inlinee if the event originated in the main method |
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209 int highest_level = inlinee->highest_osr_comp_level(); |
| 1783 | 210 if (highest_level > comp_level) { |
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211 osr_nm = inlinee->lookup_osr_nmethod_for(bci, highest_level, false); |
| 1783 | 212 } |
| 213 } | |
| 214 return osr_nm; | |
| 215 } | |
| 216 | |
| 217 // Check if the method can be compiled, change level if necessary | |
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218 void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
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219 assert(level <= TieredStopAtLevel, "Invalid compilation level"); |
| 1783 | 220 if (level == CompLevel_none) { |
| 221 return; | |
| 222 } | |
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223 // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling |
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224 // in the interpreter and then compile with C2 (the transition function will request that, |
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225 // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with |
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226 // pure C1. |
| 1783 | 227 if (!can_be_compiled(mh, level)) { |
| 228 if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) { | |
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229 compile(mh, bci, CompLevel_simple, thread); |
| 1783 | 230 } |
| 231 return; | |
| 232 } | |
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233 if (bci != InvocationEntryBci && mh->is_not_osr_compilable(level)) { |
| 1783 | 234 return; |
| 235 } | |
| 236 if (!CompileBroker::compilation_is_in_queue(mh, bci)) { | |
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237 if (PrintTieredEvents) { |
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238 print_event(COMPILE, mh, mh, bci, level); |
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239 } |
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240 submit_compile(mh, bci, level, thread); |
| 1783 | 241 } |
| 242 } | |
| 243 | |
| 244 // Tell the broker to compile the method | |
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245 void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
| 1783 | 246 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); |
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247 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", thread); |
| 1783 | 248 } |
| 249 | |
| 250 // Call and loop predicates determine whether a transition to a higher | |
| 251 // compilation level should be performed (pointers to predicate functions | |
| 252 // are passed to common() transition function). | |
| 253 bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) { | |
| 254 switch(cur_level) { | |
| 255 case CompLevel_none: | |
| 256 case CompLevel_limited_profile: { | |
| 257 return loop_predicate_helper<CompLevel_none>(i, b, 1.0); | |
| 258 } | |
| 259 case CompLevel_full_profile: { | |
| 260 return loop_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
| 261 } | |
| 262 default: | |
| 263 return true; | |
| 264 } | |
| 265 } | |
| 266 | |
| 267 bool SimpleThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) { | |
| 268 switch(cur_level) { | |
| 269 case CompLevel_none: | |
| 270 case CompLevel_limited_profile: { | |
| 271 return call_predicate_helper<CompLevel_none>(i, b, 1.0); | |
| 272 } | |
| 273 case CompLevel_full_profile: { | |
| 274 return call_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
| 275 } | |
| 276 default: | |
| 277 return true; | |
| 278 } | |
| 279 } | |
| 280 | |
| 281 // Determine is a method is mature. | |
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282 bool SimpleThresholdPolicy::is_mature(Method* method) { |
| 1783 | 283 if (is_trivial(method)) return true; |
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284 MethodData* mdo = method->method_data(); |
| 1783 | 285 if (mdo != NULL) { |
| 286 int i = mdo->invocation_count(); | |
| 287 int b = mdo->backedge_count(); | |
| 288 double k = ProfileMaturityPercentage / 100.0; | |
| 289 return call_predicate_helper<CompLevel_full_profile>(i, b, k) || | |
| 290 loop_predicate_helper<CompLevel_full_profile>(i, b, k); | |
| 291 } | |
| 292 return false; | |
| 293 } | |
| 294 | |
| 295 // Common transition function. Given a predicate determines if a method should transition to another level. | |
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296 CompLevel SimpleThresholdPolicy::common(Predicate p, Method* method, CompLevel cur_level) { |
| 1783 | 297 CompLevel next_level = cur_level; |
| 298 int i = method->invocation_count(); | |
| 299 int b = method->backedge_count(); | |
| 300 | |
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301 if (is_trivial(method)) { |
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302 next_level = CompLevel_simple; |
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303 } else { |
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304 switch(cur_level) { |
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305 case CompLevel_none: |
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306 // If we were at full profile level, would we switch to full opt? |
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307 if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) { |
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308 next_level = CompLevel_full_optimization; |
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309 } else if ((this->*p)(i, b, cur_level)) { |
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310 next_level = CompLevel_full_profile; |
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311 } |
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312 break; |
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313 case CompLevel_limited_profile: |
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314 case CompLevel_full_profile: |
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315 { |
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316 MethodData* mdo = method->method_data(); |
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317 if (mdo != NULL) { |
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318 if (mdo->would_profile()) { |
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319 int mdo_i = mdo->invocation_count_delta(); |
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320 int mdo_b = mdo->backedge_count_delta(); |
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321 if ((this->*p)(mdo_i, mdo_b, cur_level)) { |
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322 next_level = CompLevel_full_optimization; |
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323 } |
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324 } else { |
| 2252 | 325 next_level = CompLevel_full_optimization; |
| 326 } | |
| 1783 | 327 } |
| 328 } | |
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329 break; |
| 1783 | 330 } |
| 331 } | |
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332 return MIN2(next_level, (CompLevel)TieredStopAtLevel); |
| 1783 | 333 } |
| 334 | |
| 335 // Determine if a method should be compiled with a normal entry point at a different level. | |
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336 CompLevel SimpleThresholdPolicy::call_event(Method* method, CompLevel cur_level) { |
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337 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
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338 common(&SimpleThresholdPolicy::loop_predicate, method, cur_level)); |
| 1783 | 339 CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level); |
| 340 | |
| 341 // If OSR method level is greater than the regular method level, the levels should be | |
| 342 // equalized by raising the regular method level in order to avoid OSRs during each | |
| 343 // invocation of the method. | |
| 344 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { | |
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345 MethodData* mdo = method->method_data(); |
| 1783 | 346 guarantee(mdo != NULL, "MDO should not be NULL"); |
| 347 if (mdo->invocation_count() >= 1) { | |
| 348 next_level = CompLevel_full_optimization; | |
| 349 } | |
| 350 } else { | |
| 351 next_level = MAX2(osr_level, next_level); | |
| 352 } | |
| 353 | |
| 354 return next_level; | |
| 355 } | |
| 356 | |
| 357 // Determine if we should do an OSR compilation of a given method. | |
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358 CompLevel SimpleThresholdPolicy::loop_event(Method* method, CompLevel cur_level) { |
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359 CompLevel next_level = common(&SimpleThresholdPolicy::loop_predicate, method, cur_level); |
| 1783 | 360 if (cur_level == CompLevel_none) { |
| 361 // If there is a live OSR method that means that we deopted to the interpreter | |
| 362 // for the transition. | |
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363 CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
| 1783 | 364 if (osr_level > CompLevel_none) { |
| 365 return osr_level; | |
| 366 } | |
| 367 } | |
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368 return next_level; |
| 1783 | 369 } |
| 370 | |
| 371 | |
| 372 // Handle the invocation event. | |
| 373 void SimpleThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh, | |
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374 CompLevel level, nmethod* nm, JavaThread* thread) { |
| 1783 | 375 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, InvocationEntryBci)) { |
| 376 CompLevel next_level = call_event(mh(), level); | |
| 377 if (next_level != level) { | |
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378 compile(mh, InvocationEntryBci, next_level, thread); |
| 1783 | 379 } |
| 380 } | |
| 381 } | |
| 382 | |
| 383 // Handle the back branch event. Notice that we can compile the method | |
| 384 // with a regular entry from here. | |
| 385 void SimpleThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh, | |
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386 int bci, CompLevel level, nmethod* nm, JavaThread* thread) { |
| 1783 | 387 // If the method is already compiling, quickly bail out. |
| 388 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, bci)) { | |
| 389 // Use loop event as an opportinity to also check there's been | |
| 390 // enough calls. | |
| 391 CompLevel cur_level = comp_level(mh()); | |
| 392 CompLevel next_level = call_event(mh(), cur_level); | |
| 393 CompLevel next_osr_level = loop_event(mh(), level); | |
| 394 | |
| 395 next_level = MAX2(next_level, | |
| 396 next_osr_level < CompLevel_full_optimization ? next_osr_level : cur_level); | |
| 397 bool is_compiling = false; | |
| 398 if (next_level != cur_level) { | |
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399 compile(mh, InvocationEntryBci, next_level, thread); |
| 1783 | 400 is_compiling = true; |
| 401 } | |
| 402 | |
| 403 // Do the OSR version | |
| 404 if (!is_compiling && next_osr_level != level) { | |
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405 compile(mh, bci, next_osr_level, thread); |
| 1783 | 406 } |
| 407 } | |
| 408 } |