| /* |
| * Copyright (c) 2010, 2017, 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" |
| |
| #ifdef TIERED |
| |
| 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, Method* method); |
| bool call_predicate(int i, int b, CompLevel cur_level, Method* method); |
| bool loop_predicate(int i, int b, CompLevel cur_level, Method* method); |
| // 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, JavaThread* thread); |
| // loop_event checks if a method should be OSR compiled at a different |
| // level. |
| CompLevel loop_event(Method* method, CompLevel cur_level, JavaThread* thread); |
| void print_counters(const char* prefix, const 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, const methodHandle& mh, const methodHandle& imh, int bci, CompLevel level); |
| // Print policy-specific information if necessary |
| virtual void print_specific(EventType type, const methodHandle& mh, const methodHandle& imh, int bci, CompLevel level) { } |
| // Check if the method can be compiled, change level if necessary |
| void compile(const methodHandle& mh, int bci, CompLevel level, JavaThread* thread); |
| // Submit a given method for compilation |
| virtual void submit_compile(const 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, Method* method); |
| template<CompLevel level> static inline bool loop_predicate_helper(int i, int b, double scale, Method* method); |
| |
| // Get a compilation level for a given method. |
| static CompLevel comp_level(Method* method) { |
| CompiledMethod *nm = method->code(); |
| if (nm != NULL && nm->is_in_use()) { |
| return (CompLevel)nm->comp_level(); |
| } |
| return CompLevel_none; |
| } |
| virtual void method_invocation_event(const methodHandle& method, const methodHandle& inlinee, |
| CompLevel level, CompiledMethod* nm, JavaThread* thread); |
| virtual void method_back_branch_event(const methodHandle& method, const methodHandle& inlinee, |
| int bci, CompLevel level, CompiledMethod* 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(const methodHandle& method, const methodHandle& inlinee, |
| int branch_bci, int bci, CompLevel comp_level, CompiledMethod* 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 // TIERED |
| |
| #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP |