Mercurial > hg > truffle
view src/share/vm/runtime/simpleThresholdPolicy.hpp @ 14466:d166675568f6
8034761: Remove the do_code_roots parameter from process_strong_roots
Reviewed-by: tschatzl, mgerdin, jmasa
author | stefank |
---|---|
date | Thu, 13 Feb 2014 17:44:39 +0100 |
parents | da91efe96a93 |
children |
line wrap: on
line source
/* * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP #include "code/nmethod.hpp" #include "oops/methodData.hpp" #include "runtime/compilationPolicy.hpp" #include "utilities/globalDefinitions.hpp" class CompileTask; class CompileQueue; class SimpleThresholdPolicy : public CompilationPolicy { int _c1_count, _c2_count; // Check if the counter is big enough and set carry (effectively infinity). inline void set_carry_if_necessary(InvocationCounter *counter); // Set carry flags in the counters (in Method* and MDO). inline void handle_counter_overflow(Method* method); // Call and loop predicates determine whether a transition to a higher compilation // level should be performed (pointers to predicate functions are passed to common_TF(). // Predicates also take compiler load into account. typedef bool (SimpleThresholdPolicy::*Predicate)(int i, int b, CompLevel cur_level); bool call_predicate(int i, int b, CompLevel cur_level); bool loop_predicate(int i, int b, CompLevel cur_level); // Common transition function. Given a predicate determines if a method should transition to another level. CompLevel common(Predicate p, Method* method, CompLevel cur_level); // Transition functions. // call_event determines if a method should be compiled at a different // level with a regular invocation entry. CompLevel call_event(Method* method, CompLevel cur_level); // loop_event checks if a method should be OSR compiled at a different // level. CompLevel loop_event(Method* method, CompLevel cur_level); void print_counters(const char* prefix, methodHandle mh); protected: int c1_count() const { return _c1_count; } int c2_count() const { return _c2_count; } void set_c1_count(int x) { _c1_count = x; } void set_c2_count(int x) { _c2_count = x; } enum EventType { CALL, LOOP, COMPILE, REMOVE_FROM_QUEUE, UPDATE_IN_QUEUE, REPROFILE, MAKE_NOT_ENTRANT }; void print_event(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level); // Print policy-specific information if necessary virtual void print_specific(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level) { } // Check if the method can be compiled, change level if necessary void compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread); // Submit a given method for compilation virtual void submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread); // Simple methods are as good being compiled with C1 as C2. // This function tells if it's such a function. inline bool is_trivial(Method* method); // Predicate helpers are used by .*_predicate() methods as well as others. // They check the given counter values, multiplied by the scale against the thresholds. template<CompLevel level> static inline bool call_predicate_helper(int i, int b, double scale); template<CompLevel level> static inline bool loop_predicate_helper(int i, int b, double scale); // Get a compilation level for a given method. static CompLevel comp_level(Method* method) { nmethod *nm = method->code(); if (nm != NULL && nm->is_in_use()) { return (CompLevel)nm->comp_level(); } return CompLevel_none; } virtual void method_invocation_event(methodHandle method, methodHandle inlinee, CompLevel level, nmethod* nm, JavaThread* thread); virtual void method_back_branch_event(methodHandle method, methodHandle inlinee, int bci, CompLevel level, nmethod* nm, JavaThread* thread); public: SimpleThresholdPolicy() : _c1_count(0), _c2_count(0) { } virtual int compiler_count(CompLevel comp_level) { if (is_c1_compile(comp_level)) return c1_count(); if (is_c2_compile(comp_level)) return c2_count(); return 0; } virtual CompLevel initial_compile_level() { return MIN2((CompLevel)TieredStopAtLevel, CompLevel_initial_compile); } virtual void do_safepoint_work() { } virtual void delay_compilation(Method* method) { } virtual void disable_compilation(Method* method) { } virtual void reprofile(ScopeDesc* trap_scope, bool is_osr); virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread); // Select task is called by CompileBroker. We should return a task or NULL. virtual CompileTask* select_task(CompileQueue* compile_queue); // Tell the runtime if we think a given method is adequately profiled. virtual bool is_mature(Method* method); // Initialize: set compiler thread count virtual void initialize(); virtual bool should_not_inline(ciEnv* env, ciMethod* callee) { return (env->comp_level() == CompLevel_limited_profile || env->comp_level() == CompLevel_full_profile) && callee->has_loops(); } }; #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP