author | dholmes |
Mon, 16 Nov 2015 14:47:21 -0500 | |
changeset 34142 | 5a9fb81665b3 |
parent 33593 | 60764a78fa5c |
child 35547 | 0ee84aa8e705 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "compiler/compileBroker.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "runtime/arguments.hpp" |
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#include "runtime/simpleThresholdPolicy.hpp" |
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#include "runtime/simpleThresholdPolicy.inline.hpp" |
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#include "code/scopeDesc.hpp" |
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void SimpleThresholdPolicy::print_counters(const char* prefix, methodHandle mh) { |
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int invocation_count = mh->invocation_count(); |
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int backedge_count = mh->backedge_count(); |
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MethodData* mdh = mh->method_data(); |
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int mdo_invocations = 0, mdo_backedges = 0; |
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int mdo_invocations_start = 0, mdo_backedges_start = 0; |
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if (mdh != NULL) { |
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mdo_invocations = mdh->invocation_count(); |
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mdo_backedges = mdh->backedge_count(); |
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mdo_invocations_start = mdh->invocation_count_start(); |
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mdo_backedges_start = mdh->backedge_count_start(); |
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} |
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tty->print(" %stotal=%d,%d %smdo=%d(%d),%d(%d)", prefix, |
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invocation_count, backedge_count, prefix, |
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mdo_invocations, mdo_invocations_start, |
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mdo_backedges, mdo_backedges_start); |
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tty->print(" %smax levels=%d,%d", prefix, |
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mh->highest_comp_level(), mh->highest_osr_comp_level()); |
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} |
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// Print an event. |
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void SimpleThresholdPolicy::print_event(EventType type, methodHandle mh, methodHandle imh, |
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int bci, CompLevel level) { |
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bool inlinee_event = mh() != imh(); |
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ttyLocker tty_lock; |
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tty->print("%lf: [", os::elapsedTime()); |
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switch(type) { |
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case CALL: |
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tty->print("call"); |
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break; |
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case LOOP: |
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tty->print("loop"); |
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break; |
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case COMPILE: |
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tty->print("compile"); |
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break; |
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case REMOVE_FROM_QUEUE: |
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tty->print("remove-from-queue"); |
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break; |
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case UPDATE_IN_QUEUE: |
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tty->print("update-in-queue"); |
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break; |
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case REPROFILE: |
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tty->print("reprofile"); |
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break; |
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case MAKE_NOT_ENTRANT: |
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tty->print("make-not-entrant"); |
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break; |
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default: |
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tty->print("unknown"); |
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} |
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tty->print(" level=%d ", level); |
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ResourceMark rm; |
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char *method_name = mh->name_and_sig_as_C_string(); |
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tty->print("[%s", method_name); |
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if (inlinee_event) { |
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char *inlinee_name = imh->name_and_sig_as_C_string(); |
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tty->print(" [%s]] ", inlinee_name); |
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} |
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else tty->print("] "); |
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tty->print("@%d queues=%d,%d", bci, CompileBroker::queue_size(CompLevel_full_profile), |
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CompileBroker::queue_size(CompLevel_full_optimization)); |
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print_specific(type, mh, imh, bci, level); |
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if (type != COMPILE) { |
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print_counters("", mh); |
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if (inlinee_event) { |
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print_counters("inlinee ", imh); |
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} |
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tty->print(" compilable="); |
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bool need_comma = false; |
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if (!mh->is_not_compilable(CompLevel_full_profile)) { |
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tty->print("c1"); |
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need_comma = true; |
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} |
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if (!mh->is_not_osr_compilable(CompLevel_full_profile)) { |
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if (need_comma) tty->print(","); |
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tty->print("c1-osr"); |
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need_comma = true; |
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} |
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if (!mh->is_not_compilable(CompLevel_full_optimization)) { |
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if (need_comma) tty->print(","); |
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tty->print("c2"); |
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need_comma = true; |
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} |
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if (!mh->is_not_osr_compilable(CompLevel_full_optimization)) { |
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if (need_comma) tty->print(","); |
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tty->print("c2-osr"); |
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} |
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tty->print(" status="); |
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if (mh->queued_for_compilation()) { |
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tty->print("in-queue"); |
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} else tty->print("idle"); |
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} |
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tty->print_cr("]"); |
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} |
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void SimpleThresholdPolicy::initialize() { |
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if (FLAG_IS_DEFAULT(CICompilerCount)) { |
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FLAG_SET_DEFAULT(CICompilerCount, 3); |
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} |
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int count = CICompilerCount; |
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if (CICompilerCountPerCPU) { |
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count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2; |
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} |
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set_c1_count(MAX2(count / 3, 1)); |
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set_c2_count(MAX2(count - c1_count(), 1)); |
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FLAG_SET_ERGO(intx, CICompilerCount, c1_count() + c2_count()); |
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} |
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void SimpleThresholdPolicy::set_carry_if_necessary(InvocationCounter *counter) { |
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if (!counter->carry() && counter->count() > InvocationCounter::count_limit / 2) { |
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counter->set_carry_flag(); |
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} |
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} |
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// Set carry flags on the counters if necessary |
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void SimpleThresholdPolicy::handle_counter_overflow(Method* method) { |
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MethodCounters *mcs = method->method_counters(); |
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if (mcs != NULL) { |
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set_carry_if_necessary(mcs->invocation_counter()); |
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set_carry_if_necessary(mcs->backedge_counter()); |
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} |
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MethodData* mdo = method->method_data(); |
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if (mdo != NULL) { |
164 |
set_carry_if_necessary(mdo->invocation_counter()); |
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set_carry_if_necessary(mdo->backedge_counter()); |
|
166 |
} |
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167 |
} |
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168 |
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// Called with the queue locked and with at least one element |
|
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CompileTask* SimpleThresholdPolicy::select_task(CompileQueue* compile_queue) { |
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return compile_queue->first(); |
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172 |
} |
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173 |
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void SimpleThresholdPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { |
175 |
for (ScopeDesc* sd = trap_scope;; sd = sd->sender()) { |
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if (PrintTieredEvents) { |
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177 |
methodHandle mh(sd->method()); |
|
178 |
print_event(REPROFILE, mh, mh, InvocationEntryBci, CompLevel_none); |
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179 |
} |
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MethodData* mdo = sd->method()->method_data(); |
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if (mdo != NULL) { |
182 |
mdo->reset_start_counters(); |
|
183 |
} |
|
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if (sd->is_top()) break; |
|
185 |
} |
|
186 |
} |
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nmethod* SimpleThresholdPolicy::event(const methodHandle& method, const methodHandle& inlinee, |
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int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) { |
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if (comp_level == CompLevel_none && |
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JvmtiExport::can_post_interpreter_events() && |
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thread->is_interp_only_mode()) { |
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return NULL; |
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} |
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if (CompileTheWorld || ReplayCompiles) { |
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// Don't trigger other compiles in testing mode |
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return NULL; |
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198 |
} |
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|
200 |
handle_counter_overflow(method()); |
|
201 |
if (method() != inlinee()) { |
|
202 |
handle_counter_overflow(inlinee()); |
|
203 |
} |
|
204 |
||
205 |
if (PrintTieredEvents) { |
|
206 |
print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level); |
|
207 |
} |
|
208 |
||
209 |
if (bci == InvocationEntryBci) { |
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210 |
method_invocation_event(method, inlinee, comp_level, nm, thread); |
6453 | 211 |
} else { |
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// method == inlinee if the event originated in the main method |
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method_back_branch_event(method, inlinee, bci, comp_level, nm, thread); |
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// Check if event led to a higher level OSR compilation |
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nmethod* osr_nm = inlinee->lookup_osr_nmethod_for(bci, comp_level, false); |
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216 |
if (osr_nm != NULL && osr_nm->comp_level() > comp_level) { |
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// Perform OSR with new nmethod |
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return osr_nm; |
6453 | 219 |
} |
220 |
} |
|
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221 |
return NULL; |
6453 | 222 |
} |
223 |
||
224 |
// Check if the method can be compiled, change level if necessary |
|
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225 |
void SimpleThresholdPolicy::compile(const methodHandle& mh, int bci, CompLevel level, JavaThread* thread) { |
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226 |
assert(level <= TieredStopAtLevel, "Invalid compilation level"); |
6453 | 227 |
if (level == CompLevel_none) { |
228 |
return; |
|
229 |
} |
|
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230 |
// Check if the method can be compiled. If it cannot be compiled with C1, continue profiling |
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231 |
// in the interpreter and then compile with C2 (the transition function will request that, |
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232 |
// see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with |
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233 |
// pure C1. |
6453 | 234 |
if (!can_be_compiled(mh, level)) { |
235 |
if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) { |
|
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236 |
compile(mh, bci, CompLevel_simple, thread); |
6453 | 237 |
} |
238 |
return; |
|
239 |
} |
|
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|
240 |
if (bci != InvocationEntryBci && mh->is_not_osr_compilable(level)) { |
6453 | 241 |
return; |
242 |
} |
|
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|
243 |
if (!CompileBroker::compilation_is_in_queue(mh)) { |
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|
244 |
if (PrintTieredEvents) { |
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|
245 |
print_event(COMPILE, mh, mh, bci, level); |
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|
246 |
} |
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|
247 |
submit_compile(mh, bci, level, thread); |
6453 | 248 |
} |
249 |
} |
|
250 |
||
251 |
// Tell the broker to compile the method |
|
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252 |
void SimpleThresholdPolicy::submit_compile(const methodHandle& mh, int bci, CompLevel level, JavaThread* thread) { |
6453 | 253 |
int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); |
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|
254 |
CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", thread); |
6453 | 255 |
} |
256 |
||
257 |
// Call and loop predicates determine whether a transition to a higher |
|
258 |
// compilation level should be performed (pointers to predicate functions |
|
259 |
// are passed to common() transition function). |
|
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|
260 |
bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level, Method* method) { |
6453 | 261 |
switch(cur_level) { |
262 |
case CompLevel_none: |
|
263 |
case CompLevel_limited_profile: { |
|
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|
264 |
return loop_predicate_helper<CompLevel_none>(i, b, 1.0, method); |
6453 | 265 |
} |
266 |
case CompLevel_full_profile: { |
|
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|
267 |
return loop_predicate_helper<CompLevel_full_profile>(i, b, 1.0, method); |
6453 | 268 |
} |
269 |
default: |
|
270 |
return true; |
|
271 |
} |
|
272 |
} |
|
273 |
||
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|
274 |
bool SimpleThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level, Method* method) { |
6453 | 275 |
switch(cur_level) { |
276 |
case CompLevel_none: |
|
277 |
case CompLevel_limited_profile: { |
|
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|
278 |
return call_predicate_helper<CompLevel_none>(i, b, 1.0, method); |
6453 | 279 |
} |
280 |
case CompLevel_full_profile: { |
|
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|
281 |
return call_predicate_helper<CompLevel_full_profile>(i, b, 1.0, method); |
6453 | 282 |
} |
283 |
default: |
|
284 |
return true; |
|
285 |
} |
|
286 |
} |
|
287 |
||
288 |
// Determine is a method is mature. |
|
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|
289 |
bool SimpleThresholdPolicy::is_mature(Method* method) { |
6453 | 290 |
if (is_trivial(method)) return true; |
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|
291 |
MethodData* mdo = method->method_data(); |
6453 | 292 |
if (mdo != NULL) { |
293 |
int i = mdo->invocation_count(); |
|
294 |
int b = mdo->backedge_count(); |
|
295 |
double k = ProfileMaturityPercentage / 100.0; |
|
28650
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|
296 |
return call_predicate_helper<CompLevel_full_profile>(i, b, k, method) || |
772aaab2582f
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changeset
|
297 |
loop_predicate_helper<CompLevel_full_profile>(i, b, k, method); |
6453 | 298 |
} |
299 |
return false; |
|
300 |
} |
|
301 |
||
302 |
// Common transition function. Given a predicate determines if a method should transition to another level. |
|
13728
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|
303 |
CompLevel SimpleThresholdPolicy::common(Predicate p, Method* method, CompLevel cur_level) { |
6453 | 304 |
CompLevel next_level = cur_level; |
305 |
int i = method->invocation_count(); |
|
306 |
int b = method->backedge_count(); |
|
307 |
||
10250
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changeset
|
308 |
if (is_trivial(method)) { |
0794cd144834
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|
309 |
next_level = CompLevel_simple; |
0794cd144834
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|
310 |
} else { |
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|
311 |
switch(cur_level) { |
0794cd144834
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changeset
|
312 |
case CompLevel_none: |
0794cd144834
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changeset
|
313 |
// If we were at full profile level, would we switch to full opt? |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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diff
changeset
|
314 |
if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) { |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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10014
diff
changeset
|
315 |
next_level = CompLevel_full_optimization; |
28650
772aaab2582f
8059606: Enable per-method usage of CompileThresholdScaling (per-method compilation thresholds)
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diff
changeset
|
316 |
} else if ((this->*p)(i, b, cur_level, method)) { |
10250
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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changeset
|
317 |
next_level = CompLevel_full_profile; |
0794cd144834
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diff
changeset
|
318 |
} |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
iveresov
parents:
10014
diff
changeset
|
319 |
break; |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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parents:
10014
diff
changeset
|
320 |
case CompLevel_limited_profile: |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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10014
diff
changeset
|
321 |
case CompLevel_full_profile: |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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diff
changeset
|
322 |
{ |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
323 |
MethodData* mdo = method->method_data(); |
10250
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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diff
changeset
|
324 |
if (mdo != NULL) { |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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10014
diff
changeset
|
325 |
if (mdo->would_profile()) { |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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10014
diff
changeset
|
326 |
int mdo_i = mdo->invocation_count_delta(); |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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diff
changeset
|
327 |
int mdo_b = mdo->backedge_count_delta(); |
28650
772aaab2582f
8059606: Enable per-method usage of CompileThresholdScaling (per-method compilation thresholds)
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parents:
27447
diff
changeset
|
328 |
if ((this->*p)(mdo_i, mdo_b, cur_level, method)) { |
10250
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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diff
changeset
|
329 |
next_level = CompLevel_full_optimization; |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
iveresov
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10014
diff
changeset
|
330 |
} |
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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diff
changeset
|
331 |
} else { |
8322 | 332 |
next_level = CompLevel_full_optimization; |
333 |
} |
|
6453 | 334 |
} |
335 |
} |
|
10250
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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10014
diff
changeset
|
336 |
break; |
6453 | 337 |
} |
338 |
} |
|
10250
0794cd144834
7066339: Tiered: policy should make consistent decisions about osr levels
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diff
changeset
|
339 |
return MIN2(next_level, (CompLevel)TieredStopAtLevel); |
6453 | 340 |
} |
341 |
||
342 |
// Determine if a method should be compiled with a normal entry point at a different level. |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
11572
diff
changeset
|
343 |
CompLevel SimpleThresholdPolicy::call_event(Method* method, CompLevel cur_level) { |
10013
714ad59b56cb
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
9625
diff
changeset
|
344 |
CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
714ad59b56cb
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
9625
diff
changeset
|
345 |
common(&SimpleThresholdPolicy::loop_predicate, method, cur_level)); |
6453 | 346 |
CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level); |
347 |
||
348 |
// If OSR method level is greater than the regular method level, the levels should be |
|
349 |
// equalized by raising the regular method level in order to avoid OSRs during each |
|
350 |
// invocation of the method. |
|
351 |
if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
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11572
diff
changeset
|
352 |
MethodData* mdo = method->method_data(); |
6453 | 353 |
guarantee(mdo != NULL, "MDO should not be NULL"); |
354 |
if (mdo->invocation_count() >= 1) { |
|
355 |
next_level = CompLevel_full_optimization; |
|
356 |
} |
|
357 |
} else { |
|
358 |
next_level = MAX2(osr_level, next_level); |
|
359 |
} |
|
360 |
||
361 |
return next_level; |
|
362 |
} |
|
363 |
||
364 |
// Determine if we should do an OSR compilation of a given method. |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
11572
diff
changeset
|
365 |
CompLevel SimpleThresholdPolicy::loop_event(Method* method, CompLevel cur_level) { |
10013
714ad59b56cb
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
9625
diff
changeset
|
366 |
CompLevel next_level = common(&SimpleThresholdPolicy::loop_predicate, method, cur_level); |
6453 | 367 |
if (cur_level == CompLevel_none) { |
368 |
// If there is a live OSR method that means that we deopted to the interpreter |
|
369 |
// for the transition. |
|
10013
714ad59b56cb
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
9625
diff
changeset
|
370 |
CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
6453 | 371 |
if (osr_level > CompLevel_none) { |
372 |
return osr_level; |
|
373 |
} |
|
374 |
} |
|
10013
714ad59b56cb
7058689: Tiered: Reprofiling doesn't happen in presence of level 4 OSR methods
iveresov
parents:
9625
diff
changeset
|
375 |
return next_level; |
6453 | 376 |
} |
377 |
||
378 |
||
379 |
// Handle the invocation event. |
|
33593
60764a78fa5c
8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
parents:
28650
diff
changeset
|
380 |
void SimpleThresholdPolicy::method_invocation_event(const methodHandle& mh, const methodHandle& imh, |
11572
84afef481892
7131259: compile_method and CompilationPolicy::event shouldn't be declared TRAPS
iveresov
parents:
11192
diff
changeset
|
381 |
CompLevel level, nmethod* nm, JavaThread* thread) { |
24321
621f7e09fc0a
8040798: compiler/startup/SmallCodeCacheStartup.java timed out in RT_Baseline
anoll
parents:
24013
diff
changeset
|
382 |
if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh)) { |
6453 | 383 |
CompLevel next_level = call_event(mh(), level); |
384 |
if (next_level != level) { |
|
11572
84afef481892
7131259: compile_method and CompilationPolicy::event shouldn't be declared TRAPS
iveresov
parents:
11192
diff
changeset
|
385 |
compile(mh, InvocationEntryBci, next_level, thread); |
6453 | 386 |
} |
387 |
} |
|
388 |
} |
|
389 |
||
390 |
// Handle the back branch event. Notice that we can compile the method |
|
391 |
// with a regular entry from here. |
|
33593
60764a78fa5c
8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
parents:
28650
diff
changeset
|
392 |
void SimpleThresholdPolicy::method_back_branch_event(const methodHandle& mh, const methodHandle& imh, |
11572
84afef481892
7131259: compile_method and CompilationPolicy::event shouldn't be declared TRAPS
iveresov
parents:
11192
diff
changeset
|
393 |
int bci, CompLevel level, nmethod* nm, JavaThread* thread) { |
6453 | 394 |
// If the method is already compiling, quickly bail out. |
24321
621f7e09fc0a
8040798: compiler/startup/SmallCodeCacheStartup.java timed out in RT_Baseline
anoll
parents:
24013
diff
changeset
|
395 |
if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh)) { |
22551 | 396 |
// Use loop event as an opportunity to also check there's been |
6453 | 397 |
// enough calls. |
398 |
CompLevel cur_level = comp_level(mh()); |
|
399 |
CompLevel next_level = call_event(mh(), cur_level); |
|
400 |
CompLevel next_osr_level = loop_event(mh(), level); |
|
401 |
||
402 |
next_level = MAX2(next_level, |
|
403 |
next_osr_level < CompLevel_full_optimization ? next_osr_level : cur_level); |
|
404 |
bool is_compiling = false; |
|
405 |
if (next_level != cur_level) { |
|
11572
84afef481892
7131259: compile_method and CompilationPolicy::event shouldn't be declared TRAPS
iveresov
parents:
11192
diff
changeset
|
406 |
compile(mh, InvocationEntryBci, next_level, thread); |
6453 | 407 |
is_compiling = true; |
408 |
} |
|
409 |
||
410 |
// Do the OSR version |
|
411 |
if (!is_compiling && next_osr_level != level) { |
|
11572
84afef481892
7131259: compile_method and CompilationPolicy::event shouldn't be declared TRAPS
iveresov
parents:
11192
diff
changeset
|
412 |
compile(mh, bci, next_osr_level, thread); |
6453 | 413 |
} |
414 |
} |
|
415 |
} |