Tue, 24 Dec 2013 11:48:39 -0800
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
iveresov@2138 | 1 | /* |
jiangli@4936 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
iveresov@2138 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
iveresov@2138 | 4 | * |
iveresov@2138 | 5 | * This code is free software; you can redistribute it and/or modify it |
iveresov@2138 | 6 | * under the terms of the GNU General Public License version 2 only, as |
iveresov@2138 | 7 | * published by the Free Software Foundation. |
iveresov@2138 | 8 | * |
iveresov@2138 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
iveresov@2138 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
iveresov@2138 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
iveresov@2138 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
iveresov@2138 | 13 | * accompanied this code). |
iveresov@2138 | 14 | * |
iveresov@2138 | 15 | * You should have received a copy of the GNU General Public License version |
iveresov@2138 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
iveresov@2138 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
iveresov@2138 | 18 | * |
iveresov@2138 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
iveresov@2138 | 20 | * or visit www.oracle.com if you need additional information or have any |
iveresov@2138 | 21 | * questions. |
iveresov@2138 | 22 | * |
iveresov@2138 | 23 | */ |
iveresov@2138 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "compiler/compileBroker.hpp" |
stefank@2314 | 27 | #include "memory/resourceArea.hpp" |
stefank@2314 | 28 | #include "runtime/arguments.hpp" |
stefank@2314 | 29 | #include "runtime/simpleThresholdPolicy.hpp" |
stefank@2314 | 30 | #include "runtime/simpleThresholdPolicy.inline.hpp" |
iveresov@2559 | 31 | #include "code/scopeDesc.hpp" |
iveresov@2138 | 32 | |
iveresov@3312 | 33 | |
iveresov@3312 | 34 | void SimpleThresholdPolicy::print_counters(const char* prefix, methodHandle mh) { |
iveresov@3312 | 35 | int invocation_count = mh->invocation_count(); |
iveresov@3312 | 36 | int backedge_count = mh->backedge_count(); |
coleenp@4037 | 37 | MethodData* mdh = mh->method_data(); |
iveresov@3312 | 38 | int mdo_invocations = 0, mdo_backedges = 0; |
iveresov@3312 | 39 | int mdo_invocations_start = 0, mdo_backedges_start = 0; |
coleenp@4037 | 40 | if (mdh != NULL) { |
iveresov@3312 | 41 | mdo_invocations = mdh->invocation_count(); |
iveresov@3312 | 42 | mdo_backedges = mdh->backedge_count(); |
iveresov@3312 | 43 | mdo_invocations_start = mdh->invocation_count_start(); |
iveresov@3312 | 44 | mdo_backedges_start = mdh->backedge_count_start(); |
iveresov@3312 | 45 | } |
twisti@4111 | 46 | tty->print(" %stotal=%d,%d %smdo=%d(%d),%d(%d)", prefix, |
iveresov@3312 | 47 | invocation_count, backedge_count, prefix, |
iveresov@3312 | 48 | mdo_invocations, mdo_invocations_start, |
iveresov@3312 | 49 | mdo_backedges, mdo_backedges_start); |
twisti@4111 | 50 | tty->print(" %smax levels=%d,%d", prefix, |
iveresov@3312 | 51 | mh->highest_comp_level(), mh->highest_osr_comp_level()); |
iveresov@3312 | 52 | } |
iveresov@3312 | 53 | |
iveresov@2138 | 54 | // Print an event. |
iveresov@2138 | 55 | void SimpleThresholdPolicy::print_event(EventType type, methodHandle mh, methodHandle imh, |
iveresov@2138 | 56 | int bci, CompLevel level) { |
iveresov@2138 | 57 | bool inlinee_event = mh() != imh(); |
iveresov@2138 | 58 | |
iveresov@2138 | 59 | ttyLocker tty_lock; |
iveresov@2138 | 60 | tty->print("%lf: [", os::elapsedTime()); |
iveresov@2138 | 61 | |
iveresov@2138 | 62 | switch(type) { |
iveresov@2138 | 63 | case CALL: |
iveresov@2138 | 64 | tty->print("call"); |
iveresov@2138 | 65 | break; |
iveresov@2138 | 66 | case LOOP: |
iveresov@2138 | 67 | tty->print("loop"); |
iveresov@2138 | 68 | break; |
iveresov@2138 | 69 | case COMPILE: |
iveresov@2138 | 70 | tty->print("compile"); |
iveresov@2559 | 71 | break; |
iveresov@2988 | 72 | case REMOVE_FROM_QUEUE: |
iveresov@2988 | 73 | tty->print("remove-from-queue"); |
iveresov@2559 | 74 | break; |
iveresov@2988 | 75 | case UPDATE_IN_QUEUE: |
iveresov@2988 | 76 | tty->print("update-in-queue"); |
iveresov@2559 | 77 | break; |
iveresov@2559 | 78 | case REPROFILE: |
iveresov@2559 | 79 | tty->print("reprofile"); |
iveresov@2559 | 80 | break; |
iveresov@2988 | 81 | case MAKE_NOT_ENTRANT: |
iveresov@2988 | 82 | tty->print("make-not-entrant"); |
iveresov@2988 | 83 | break; |
iveresov@2559 | 84 | default: |
iveresov@2559 | 85 | tty->print("unknown"); |
iveresov@2138 | 86 | } |
iveresov@2138 | 87 | |
twisti@4111 | 88 | tty->print(" level=%d ", level); |
iveresov@2138 | 89 | |
iveresov@2138 | 90 | ResourceMark rm; |
iveresov@2138 | 91 | char *method_name = mh->name_and_sig_as_C_string(); |
iveresov@2138 | 92 | tty->print("[%s", method_name); |
iveresov@2138 | 93 | if (inlinee_event) { |
iveresov@2138 | 94 | char *inlinee_name = imh->name_and_sig_as_C_string(); |
iveresov@2138 | 95 | tty->print(" [%s]] ", inlinee_name); |
iveresov@2138 | 96 | } |
iveresov@2138 | 97 | else tty->print("] "); |
twisti@4111 | 98 | tty->print("@%d queues=%d,%d", bci, CompileBroker::queue_size(CompLevel_full_profile), |
twisti@4111 | 99 | CompileBroker::queue_size(CompLevel_full_optimization)); |
iveresov@2138 | 100 | |
iveresov@2138 | 101 | print_specific(type, mh, imh, bci, level); |
iveresov@2138 | 102 | |
iveresov@2138 | 103 | if (type != COMPILE) { |
iveresov@3312 | 104 | print_counters("", mh); |
iveresov@2138 | 105 | if (inlinee_event) { |
iveresov@3312 | 106 | print_counters("inlinee ", imh); |
iveresov@2138 | 107 | } |
twisti@4111 | 108 | tty->print(" compilable="); |
iveresov@2138 | 109 | bool need_comma = false; |
iveresov@2138 | 110 | if (!mh->is_not_compilable(CompLevel_full_profile)) { |
iveresov@2138 | 111 | tty->print("c1"); |
iveresov@2138 | 112 | need_comma = true; |
iveresov@2138 | 113 | } |
twisti@4111 | 114 | if (!mh->is_not_osr_compilable(CompLevel_full_profile)) { |
twisti@4111 | 115 | if (need_comma) tty->print(","); |
twisti@4111 | 116 | tty->print("c1-osr"); |
twisti@4111 | 117 | need_comma = true; |
twisti@4111 | 118 | } |
iveresov@2138 | 119 | if (!mh->is_not_compilable(CompLevel_full_optimization)) { |
twisti@4111 | 120 | if (need_comma) tty->print(","); |
iveresov@2138 | 121 | tty->print("c2"); |
iveresov@2138 | 122 | need_comma = true; |
iveresov@2138 | 123 | } |
twisti@4111 | 124 | if (!mh->is_not_osr_compilable(CompLevel_full_optimization)) { |
twisti@4111 | 125 | if (need_comma) tty->print(","); |
twisti@4111 | 126 | tty->print("c2-osr"); |
iveresov@2138 | 127 | } |
twisti@4111 | 128 | tty->print(" status="); |
iveresov@2138 | 129 | if (mh->queued_for_compilation()) { |
twisti@4111 | 130 | tty->print("in-queue"); |
twisti@4111 | 131 | } else tty->print("idle"); |
iveresov@2138 | 132 | } |
iveresov@2138 | 133 | tty->print_cr("]"); |
iveresov@2138 | 134 | } |
iveresov@2138 | 135 | |
iveresov@2138 | 136 | void SimpleThresholdPolicy::initialize() { |
iveresov@2138 | 137 | if (FLAG_IS_DEFAULT(CICompilerCount)) { |
iveresov@2138 | 138 | FLAG_SET_DEFAULT(CICompilerCount, 3); |
iveresov@2138 | 139 | } |
iveresov@2138 | 140 | int count = CICompilerCount; |
iveresov@2138 | 141 | if (CICompilerCountPerCPU) { |
iveresov@2138 | 142 | count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2; |
iveresov@2138 | 143 | } |
iveresov@2138 | 144 | set_c1_count(MAX2(count / 3, 1)); |
iveresov@2138 | 145 | set_c2_count(MAX2(count - count / 3, 1)); |
iveresov@2138 | 146 | } |
iveresov@2138 | 147 | |
iveresov@2138 | 148 | void SimpleThresholdPolicy::set_carry_if_necessary(InvocationCounter *counter) { |
iveresov@2138 | 149 | if (!counter->carry() && counter->count() > InvocationCounter::count_limit / 2) { |
iveresov@2138 | 150 | counter->set_carry_flag(); |
iveresov@2138 | 151 | } |
iveresov@2138 | 152 | } |
iveresov@2138 | 153 | |
iveresov@2138 | 154 | // Set carry flags on the counters if necessary |
coleenp@4037 | 155 | void SimpleThresholdPolicy::handle_counter_overflow(Method* method) { |
jiangli@4936 | 156 | MethodCounters *mcs = method->method_counters(); |
jiangli@5036 | 157 | if (mcs != NULL) { |
jiangli@5036 | 158 | set_carry_if_necessary(mcs->invocation_counter()); |
jiangli@5036 | 159 | set_carry_if_necessary(mcs->backedge_counter()); |
jiangli@5036 | 160 | } |
coleenp@4037 | 161 | MethodData* mdo = method->method_data(); |
iveresov@2138 | 162 | if (mdo != NULL) { |
iveresov@2138 | 163 | set_carry_if_necessary(mdo->invocation_counter()); |
iveresov@2138 | 164 | set_carry_if_necessary(mdo->backedge_counter()); |
iveresov@2138 | 165 | } |
iveresov@2138 | 166 | } |
iveresov@2138 | 167 | |
iveresov@2138 | 168 | // Called with the queue locked and with at least one element |
iveresov@2138 | 169 | CompileTask* SimpleThresholdPolicy::select_task(CompileQueue* compile_queue) { |
iveresov@2138 | 170 | return compile_queue->first(); |
iveresov@2138 | 171 | } |
iveresov@2138 | 172 | |
iveresov@2559 | 173 | void SimpleThresholdPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { |
iveresov@2559 | 174 | for (ScopeDesc* sd = trap_scope;; sd = sd->sender()) { |
iveresov@2559 | 175 | if (PrintTieredEvents) { |
iveresov@2559 | 176 | methodHandle mh(sd->method()); |
iveresov@2559 | 177 | print_event(REPROFILE, mh, mh, InvocationEntryBci, CompLevel_none); |
iveresov@2559 | 178 | } |
coleenp@4037 | 179 | MethodData* mdo = sd->method()->method_data(); |
iveresov@2559 | 180 | if (mdo != NULL) { |
iveresov@2559 | 181 | mdo->reset_start_counters(); |
iveresov@2559 | 182 | } |
iveresov@2559 | 183 | if (sd->is_top()) break; |
iveresov@2559 | 184 | } |
iveresov@2559 | 185 | } |
iveresov@2559 | 186 | |
iveresov@2138 | 187 | nmethod* SimpleThresholdPolicy::event(methodHandle method, methodHandle inlinee, |
iveresov@3452 | 188 | int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) { |
iveresov@2138 | 189 | if (comp_level == CompLevel_none && |
iveresov@3452 | 190 | JvmtiExport::can_post_interpreter_events() && |
iveresov@3452 | 191 | thread->is_interp_only_mode()) { |
iveresov@3452 | 192 | return NULL; |
iveresov@2138 | 193 | } |
iveresov@2138 | 194 | nmethod *osr_nm = NULL; |
iveresov@2138 | 195 | |
iveresov@2138 | 196 | handle_counter_overflow(method()); |
iveresov@2138 | 197 | if (method() != inlinee()) { |
iveresov@2138 | 198 | handle_counter_overflow(inlinee()); |
iveresov@2138 | 199 | } |
iveresov@2138 | 200 | |
iveresov@2138 | 201 | if (PrintTieredEvents) { |
iveresov@2138 | 202 | print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level); |
iveresov@2138 | 203 | } |
iveresov@2138 | 204 | |
iveresov@2138 | 205 | if (bci == InvocationEntryBci) { |
iveresov@3452 | 206 | method_invocation_event(method, inlinee, comp_level, nm, thread); |
iveresov@2138 | 207 | } else { |
iveresov@3452 | 208 | method_back_branch_event(method, inlinee, bci, comp_level, nm, thread); |
iveresov@2988 | 209 | // method == inlinee if the event originated in the main method |
iveresov@2988 | 210 | int highest_level = inlinee->highest_osr_comp_level(); |
iveresov@2138 | 211 | if (highest_level > comp_level) { |
iveresov@2988 | 212 | osr_nm = inlinee->lookup_osr_nmethod_for(bci, highest_level, false); |
iveresov@2138 | 213 | } |
iveresov@2138 | 214 | } |
iveresov@2138 | 215 | return osr_nm; |
iveresov@2138 | 216 | } |
iveresov@2138 | 217 | |
iveresov@2138 | 218 | // Check if the method can be compiled, change level if necessary |
iveresov@3452 | 219 | void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
iveresov@3035 | 220 | assert(level <= TieredStopAtLevel, "Invalid compilation level"); |
iveresov@2138 | 221 | if (level == CompLevel_none) { |
iveresov@2138 | 222 | return; |
iveresov@2138 | 223 | } |
iveresov@2306 | 224 | // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling |
iveresov@2306 | 225 | // in the interpreter and then compile with C2 (the transition function will request that, |
iveresov@2306 | 226 | // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with |
iveresov@2306 | 227 | // pure C1. |
iveresov@2138 | 228 | if (!can_be_compiled(mh, level)) { |
iveresov@2138 | 229 | if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) { |
iveresov@3452 | 230 | compile(mh, bci, CompLevel_simple, thread); |
iveresov@2138 | 231 | } |
iveresov@2138 | 232 | return; |
iveresov@2138 | 233 | } |
twisti@4111 | 234 | if (bci != InvocationEntryBci && mh->is_not_osr_compilable(level)) { |
iveresov@2138 | 235 | return; |
iveresov@2138 | 236 | } |
iveresov@2138 | 237 | if (!CompileBroker::compilation_is_in_queue(mh, bci)) { |
iveresov@3035 | 238 | if (PrintTieredEvents) { |
iveresov@3035 | 239 | print_event(COMPILE, mh, mh, bci, level); |
iveresov@3035 | 240 | } |
iveresov@3452 | 241 | submit_compile(mh, bci, level, thread); |
iveresov@2138 | 242 | } |
iveresov@2138 | 243 | } |
iveresov@2138 | 244 | |
iveresov@2138 | 245 | // Tell the broker to compile the method |
iveresov@3452 | 246 | void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
iveresov@2138 | 247 | int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); |
iveresov@3452 | 248 | CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", thread); |
iveresov@2138 | 249 | } |
iveresov@2138 | 250 | |
iveresov@2138 | 251 | // Call and loop predicates determine whether a transition to a higher |
iveresov@2138 | 252 | // compilation level should be performed (pointers to predicate functions |
iveresov@2138 | 253 | // are passed to common() transition function). |
iveresov@2138 | 254 | bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) { |
iveresov@2138 | 255 | switch(cur_level) { |
iveresov@2138 | 256 | case CompLevel_none: |
iveresov@2138 | 257 | case CompLevel_limited_profile: { |
iveresov@2138 | 258 | return loop_predicate_helper<CompLevel_none>(i, b, 1.0); |
iveresov@2138 | 259 | } |
iveresov@2138 | 260 | case CompLevel_full_profile: { |
iveresov@2138 | 261 | return loop_predicate_helper<CompLevel_full_profile>(i, b, 1.0); |
iveresov@2138 | 262 | } |
iveresov@2138 | 263 | default: |
iveresov@2138 | 264 | return true; |
iveresov@2138 | 265 | } |
iveresov@2138 | 266 | } |
iveresov@2138 | 267 | |
iveresov@2138 | 268 | bool SimpleThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) { |
iveresov@2138 | 269 | switch(cur_level) { |
iveresov@2138 | 270 | case CompLevel_none: |
iveresov@2138 | 271 | case CompLevel_limited_profile: { |
iveresov@2138 | 272 | return call_predicate_helper<CompLevel_none>(i, b, 1.0); |
iveresov@2138 | 273 | } |
iveresov@2138 | 274 | case CompLevel_full_profile: { |
iveresov@2138 | 275 | return call_predicate_helper<CompLevel_full_profile>(i, b, 1.0); |
iveresov@2138 | 276 | } |
iveresov@2138 | 277 | default: |
iveresov@2138 | 278 | return true; |
iveresov@2138 | 279 | } |
iveresov@2138 | 280 | } |
iveresov@2138 | 281 | |
iveresov@2138 | 282 | // Determine is a method is mature. |
coleenp@4037 | 283 | bool SimpleThresholdPolicy::is_mature(Method* method) { |
iveresov@2138 | 284 | if (is_trivial(method)) return true; |
coleenp@4037 | 285 | MethodData* mdo = method->method_data(); |
iveresov@2138 | 286 | if (mdo != NULL) { |
iveresov@2138 | 287 | int i = mdo->invocation_count(); |
iveresov@2138 | 288 | int b = mdo->backedge_count(); |
iveresov@2138 | 289 | double k = ProfileMaturityPercentage / 100.0; |
iveresov@2138 | 290 | return call_predicate_helper<CompLevel_full_profile>(i, b, k) || |
iveresov@2138 | 291 | loop_predicate_helper<CompLevel_full_profile>(i, b, k); |
iveresov@2138 | 292 | } |
iveresov@2138 | 293 | return false; |
iveresov@2138 | 294 | } |
iveresov@2138 | 295 | |
iveresov@2138 | 296 | // Common transition function. Given a predicate determines if a method should transition to another level. |
coleenp@4037 | 297 | CompLevel SimpleThresholdPolicy::common(Predicate p, Method* method, CompLevel cur_level) { |
iveresov@2138 | 298 | CompLevel next_level = cur_level; |
iveresov@2138 | 299 | int i = method->invocation_count(); |
iveresov@2138 | 300 | int b = method->backedge_count(); |
iveresov@2138 | 301 | |
iveresov@3035 | 302 | if (is_trivial(method)) { |
iveresov@3035 | 303 | next_level = CompLevel_simple; |
iveresov@3035 | 304 | } else { |
iveresov@3035 | 305 | switch(cur_level) { |
iveresov@3035 | 306 | case CompLevel_none: |
iveresov@3035 | 307 | // If we were at full profile level, would we switch to full opt? |
iveresov@3035 | 308 | if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) { |
iveresov@3035 | 309 | next_level = CompLevel_full_optimization; |
iveresov@3035 | 310 | } else if ((this->*p)(i, b, cur_level)) { |
iveresov@3035 | 311 | next_level = CompLevel_full_profile; |
iveresov@3035 | 312 | } |
iveresov@3035 | 313 | break; |
iveresov@3035 | 314 | case CompLevel_limited_profile: |
iveresov@3035 | 315 | case CompLevel_full_profile: |
iveresov@3035 | 316 | { |
coleenp@4037 | 317 | MethodData* mdo = method->method_data(); |
iveresov@3035 | 318 | if (mdo != NULL) { |
iveresov@3035 | 319 | if (mdo->would_profile()) { |
iveresov@3035 | 320 | int mdo_i = mdo->invocation_count_delta(); |
iveresov@3035 | 321 | int mdo_b = mdo->backedge_count_delta(); |
iveresov@3035 | 322 | if ((this->*p)(mdo_i, mdo_b, cur_level)) { |
iveresov@3035 | 323 | next_level = CompLevel_full_optimization; |
iveresov@3035 | 324 | } |
iveresov@3035 | 325 | } else { |
iveresov@2559 | 326 | next_level = CompLevel_full_optimization; |
iveresov@2559 | 327 | } |
iveresov@2138 | 328 | } |
iveresov@2138 | 329 | } |
iveresov@3035 | 330 | break; |
iveresov@2138 | 331 | } |
iveresov@2138 | 332 | } |
iveresov@3035 | 333 | return MIN2(next_level, (CompLevel)TieredStopAtLevel); |
iveresov@2138 | 334 | } |
iveresov@2138 | 335 | |
iveresov@2138 | 336 | // Determine if a method should be compiled with a normal entry point at a different level. |
coleenp@4037 | 337 | CompLevel SimpleThresholdPolicy::call_event(Method* method, CompLevel cur_level) { |
iveresov@2987 | 338 | CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
iveresov@2987 | 339 | common(&SimpleThresholdPolicy::loop_predicate, method, cur_level)); |
iveresov@2138 | 340 | CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level); |
iveresov@2138 | 341 | |
iveresov@2138 | 342 | // If OSR method level is greater than the regular method level, the levels should be |
iveresov@2138 | 343 | // equalized by raising the regular method level in order to avoid OSRs during each |
iveresov@2138 | 344 | // invocation of the method. |
iveresov@2138 | 345 | if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { |
coleenp@4037 | 346 | MethodData* mdo = method->method_data(); |
iveresov@2138 | 347 | guarantee(mdo != NULL, "MDO should not be NULL"); |
iveresov@2138 | 348 | if (mdo->invocation_count() >= 1) { |
iveresov@2138 | 349 | next_level = CompLevel_full_optimization; |
iveresov@2138 | 350 | } |
iveresov@2138 | 351 | } else { |
iveresov@2138 | 352 | next_level = MAX2(osr_level, next_level); |
iveresov@2138 | 353 | } |
iveresov@2138 | 354 | |
iveresov@2138 | 355 | return next_level; |
iveresov@2138 | 356 | } |
iveresov@2138 | 357 | |
iveresov@2138 | 358 | // Determine if we should do an OSR compilation of a given method. |
coleenp@4037 | 359 | CompLevel SimpleThresholdPolicy::loop_event(Method* method, CompLevel cur_level) { |
iveresov@2987 | 360 | CompLevel next_level = common(&SimpleThresholdPolicy::loop_predicate, method, cur_level); |
iveresov@2138 | 361 | if (cur_level == CompLevel_none) { |
iveresov@2138 | 362 | // If there is a live OSR method that means that we deopted to the interpreter |
iveresov@2138 | 363 | // for the transition. |
iveresov@2987 | 364 | CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
iveresov@2138 | 365 | if (osr_level > CompLevel_none) { |
iveresov@2138 | 366 | return osr_level; |
iveresov@2138 | 367 | } |
iveresov@2138 | 368 | } |
iveresov@2987 | 369 | return next_level; |
iveresov@2138 | 370 | } |
iveresov@2138 | 371 | |
iveresov@2138 | 372 | |
iveresov@2138 | 373 | // Handle the invocation event. |
iveresov@2138 | 374 | void SimpleThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh, |
iveresov@3452 | 375 | CompLevel level, nmethod* nm, JavaThread* thread) { |
iveresov@2138 | 376 | if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, InvocationEntryBci)) { |
iveresov@2138 | 377 | CompLevel next_level = call_event(mh(), level); |
iveresov@2138 | 378 | if (next_level != level) { |
iveresov@3452 | 379 | compile(mh, InvocationEntryBci, next_level, thread); |
iveresov@2138 | 380 | } |
iveresov@2138 | 381 | } |
iveresov@2138 | 382 | } |
iveresov@2138 | 383 | |
iveresov@2138 | 384 | // Handle the back branch event. Notice that we can compile the method |
iveresov@2138 | 385 | // with a regular entry from here. |
iveresov@2138 | 386 | void SimpleThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh, |
iveresov@3452 | 387 | int bci, CompLevel level, nmethod* nm, JavaThread* thread) { |
iveresov@2138 | 388 | // If the method is already compiling, quickly bail out. |
iveresov@2138 | 389 | if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, bci)) { |
iveresov@2138 | 390 | // Use loop event as an opportinity to also check there's been |
iveresov@2138 | 391 | // enough calls. |
iveresov@2138 | 392 | CompLevel cur_level = comp_level(mh()); |
iveresov@2138 | 393 | CompLevel next_level = call_event(mh(), cur_level); |
iveresov@2138 | 394 | CompLevel next_osr_level = loop_event(mh(), level); |
iveresov@2138 | 395 | |
iveresov@2138 | 396 | next_level = MAX2(next_level, |
iveresov@2138 | 397 | next_osr_level < CompLevel_full_optimization ? next_osr_level : cur_level); |
iveresov@2138 | 398 | bool is_compiling = false; |
iveresov@2138 | 399 | if (next_level != cur_level) { |
iveresov@3452 | 400 | compile(mh, InvocationEntryBci, next_level, thread); |
iveresov@2138 | 401 | is_compiling = true; |
iveresov@2138 | 402 | } |
iveresov@2138 | 403 | |
iveresov@2138 | 404 | // Do the OSR version |
iveresov@2138 | 405 | if (!is_compiling && next_osr_level != level) { |
iveresov@3452 | 406 | compile(mh, bci, next_osr_level, thread); |
iveresov@2138 | 407 | } |
iveresov@2138 | 408 | } |
iveresov@2138 | 409 | } |