Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/runtime/simpleThresholdPolicy.hpp@91ddc23482a4 (annotated)
src/share/vm/runtime/simpleThresholdPolicy.hpp
Thu, 24 May 2018 20:03:11 +0800
- author
- aoqi
- date
- Thu, 24 May 2018 20:03:11 +0800
- changeset 8868
- 91ddc23482a4
- parent 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
Increase MaxHeapSize for better performance on MIPS
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP |
| aoqi@0 | 26 | #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "code/nmethod.hpp" |
| aoqi@0 | 29 | #include "oops/methodData.hpp" |
| aoqi@0 | 30 | #include "runtime/compilationPolicy.hpp" |
| aoqi@0 | 31 | #include "utilities/globalDefinitions.hpp" |
| aoqi@0 | 32 | |
| aoqi@0 | 33 | class CompileTask; |
| aoqi@0 | 34 | class CompileQueue; |
| aoqi@0 | 35 | |
| aoqi@0 | 36 | class SimpleThresholdPolicy : public CompilationPolicy { |
| aoqi@0 | 37 | int _c1_count, _c2_count; |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | // Check if the counter is big enough and set carry (effectively infinity). |
| aoqi@0 | 40 | inline void set_carry_if_necessary(InvocationCounter *counter); |
| aoqi@0 | 41 | // Set carry flags in the counters (in Method* and MDO). |
| aoqi@0 | 42 | inline void handle_counter_overflow(Method* method); |
| aoqi@0 | 43 | // Call and loop predicates determine whether a transition to a higher compilation |
| aoqi@0 | 44 | // level should be performed (pointers to predicate functions are passed to common_TF(). |
| aoqi@0 | 45 | // Predicates also take compiler load into account. |
| aoqi@0 | 46 | typedef bool (SimpleThresholdPolicy::*Predicate)(int i, int b, CompLevel cur_level); |
| aoqi@0 | 47 | bool call_predicate(int i, int b, CompLevel cur_level); |
| aoqi@0 | 48 | bool loop_predicate(int i, int b, CompLevel cur_level); |
| aoqi@0 | 49 | // Common transition function. Given a predicate determines if a method should transition to another level. |
| aoqi@0 | 50 | CompLevel common(Predicate p, Method* method, CompLevel cur_level); |
| aoqi@0 | 51 | // Transition functions. |
| aoqi@0 | 52 | // call_event determines if a method should be compiled at a different |
| aoqi@0 | 53 | // level with a regular invocation entry. |
| aoqi@0 | 54 | CompLevel call_event(Method* method, CompLevel cur_level); |
| aoqi@0 | 55 | // loop_event checks if a method should be OSR compiled at a different |
| aoqi@0 | 56 | // level. |
| aoqi@0 | 57 | CompLevel loop_event(Method* method, CompLevel cur_level); |
| aoqi@0 | 58 | void print_counters(const char* prefix, methodHandle mh); |
| aoqi@0 | 59 | protected: |
| aoqi@0 | 60 | int c1_count() const { return _c1_count; } |
| aoqi@0 | 61 | int c2_count() const { return _c2_count; } |
| aoqi@0 | 62 | void set_c1_count(int x) { _c1_count = x; } |
| aoqi@0 | 63 | void set_c2_count(int x) { _c2_count = x; } |
| aoqi@0 | 64 | |
| aoqi@0 | 65 | enum EventType { CALL, LOOP, COMPILE, REMOVE_FROM_QUEUE, UPDATE_IN_QUEUE, REPROFILE, MAKE_NOT_ENTRANT }; |
| aoqi@0 | 66 | void print_event(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level); |
| aoqi@0 | 67 | // Print policy-specific information if necessary |
| aoqi@0 | 68 | virtual void print_specific(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level) { } |
| aoqi@0 | 69 | // Check if the method can be compiled, change level if necessary |
| aoqi@0 | 70 | void compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread); |
| aoqi@0 | 71 | // Submit a given method for compilation |
| aoqi@0 | 72 | virtual void submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread); |
| aoqi@0 | 73 | // Simple methods are as good being compiled with C1 as C2. |
| aoqi@0 | 74 | // This function tells if it's such a function. |
| aoqi@0 | 75 | inline bool is_trivial(Method* method); |
| aoqi@0 | 76 | |
| aoqi@0 | 77 | // Predicate helpers are used by .*_predicate() methods as well as others. |
| aoqi@0 | 78 | // They check the given counter values, multiplied by the scale against the thresholds. |
| aoqi@0 | 79 | template<CompLevel level> static inline bool call_predicate_helper(int i, int b, double scale); |
| aoqi@0 | 80 | template<CompLevel level> static inline bool loop_predicate_helper(int i, int b, double scale); |
| aoqi@0 | 81 | |
| aoqi@0 | 82 | // Get a compilation level for a given method. |
| aoqi@0 | 83 | static CompLevel comp_level(Method* method) { |
| aoqi@0 | 84 | nmethod *nm = method->code(); |
| aoqi@0 | 85 | if (nm != NULL && nm->is_in_use()) { |
| aoqi@0 | 86 | return (CompLevel)nm->comp_level(); |
| aoqi@0 | 87 | } |
| aoqi@0 | 88 | return CompLevel_none; |
| aoqi@0 | 89 | } |
| aoqi@0 | 90 | virtual void method_invocation_event(methodHandle method, methodHandle inlinee, |
| aoqi@0 | 91 | CompLevel level, nmethod* nm, JavaThread* thread); |
| aoqi@0 | 92 | virtual void method_back_branch_event(methodHandle method, methodHandle inlinee, |
| aoqi@0 | 93 | int bci, CompLevel level, nmethod* nm, JavaThread* thread); |
| aoqi@0 | 94 | public: |
| aoqi@0 | 95 | SimpleThresholdPolicy() : _c1_count(0), _c2_count(0) { } |
| aoqi@0 | 96 | virtual int compiler_count(CompLevel comp_level) { |
| aoqi@0 | 97 | if (is_c1_compile(comp_level)) return c1_count(); |
| aoqi@0 | 98 | if (is_c2_compile(comp_level)) return c2_count(); |
| aoqi@0 | 99 | return 0; |
| aoqi@0 | 100 | } |
| aoqi@0 | 101 | virtual CompLevel initial_compile_level() { return MIN2((CompLevel)TieredStopAtLevel, CompLevel_initial_compile); } |
| aoqi@0 | 102 | virtual void do_safepoint_work() { } |
| aoqi@0 | 103 | virtual void delay_compilation(Method* method) { } |
| aoqi@0 | 104 | virtual void disable_compilation(Method* method) { } |
| aoqi@0 | 105 | virtual void reprofile(ScopeDesc* trap_scope, bool is_osr); |
| aoqi@0 | 106 | virtual nmethod* event(methodHandle method, methodHandle inlinee, |
| aoqi@0 | 107 | int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread); |
| aoqi@0 | 108 | // Select task is called by CompileBroker. We should return a task or NULL. |
| aoqi@0 | 109 | virtual CompileTask* select_task(CompileQueue* compile_queue); |
| aoqi@0 | 110 | // Tell the runtime if we think a given method is adequately profiled. |
| aoqi@0 | 111 | virtual bool is_mature(Method* method); |
| aoqi@0 | 112 | // Initialize: set compiler thread count |
| aoqi@0 | 113 | virtual void initialize(); |
| aoqi@0 | 114 | virtual bool should_not_inline(ciEnv* env, ciMethod* callee) { |
| aoqi@0 | 115 | return (env->comp_level() == CompLevel_limited_profile || |
| aoqi@0 | 116 | env->comp_level() == CompLevel_full_profile) && |
| aoqi@0 | 117 | callee->has_loops(); |
| aoqi@0 | 118 | } |
| aoqi@0 | 119 | }; |
| aoqi@0 | 120 | |
| aoqi@0 | 121 | #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP |
