Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/simpleThresholdPolicy.hpp @ 18096:ca6d25be853b jdk8u25-b13
8044269: Analysis of archive files.
Summary: Add checksum verification.
Reviewed-by: iklam, dholmes, mschoene
| author | jiangli |
|---|---|
| date | Tue, 12 Aug 2014 17:46:16 -0400 |
| parents | da91efe96a93 |
| children |
| rev | line source |
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| 1783 | 1 /* |
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2 * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved. |
| 1783 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP |
| 26 #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP | |
| 27 | |
| 28 #include "code/nmethod.hpp" | |
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29 #include "oops/methodData.hpp" |
| 1972 | 30 #include "runtime/compilationPolicy.hpp" |
| 31 #include "utilities/globalDefinitions.hpp" | |
| 32 | |
| 1783 | 33 class CompileTask; |
| 34 class CompileQueue; | |
| 35 | |
| 36 class SimpleThresholdPolicy : public CompilationPolicy { | |
| 37 int _c1_count, _c2_count; | |
| 38 | |
| 39 // Check if the counter is big enough and set carry (effectively infinity). | |
| 40 inline void set_carry_if_necessary(InvocationCounter *counter); | |
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41 // Set carry flags in the counters (in Method* and MDO). |
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42 inline void handle_counter_overflow(Method* method); |
| 1783 | 43 // Call and loop predicates determine whether a transition to a higher compilation |
| 44 // level should be performed (pointers to predicate functions are passed to common_TF(). | |
| 45 // Predicates also take compiler load into account. | |
| 46 typedef bool (SimpleThresholdPolicy::*Predicate)(int i, int b, CompLevel cur_level); | |
| 47 bool call_predicate(int i, int b, CompLevel cur_level); | |
| 48 bool loop_predicate(int i, int b, CompLevel cur_level); | |
| 49 // Common transition function. Given a predicate determines if a method should transition to another level. | |
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50 CompLevel common(Predicate p, Method* method, CompLevel cur_level); |
| 1783 | 51 // Transition functions. |
| 52 // call_event determines if a method should be compiled at a different | |
| 53 // level with a regular invocation entry. | |
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54 CompLevel call_event(Method* method, CompLevel cur_level); |
| 1783 | 55 // loop_event checks if a method should be OSR compiled at a different |
| 56 // level. | |
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57 CompLevel loop_event(Method* method, CompLevel cur_level); |
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58 void print_counters(const char* prefix, methodHandle mh); |
| 1783 | 59 protected: |
| 60 int c1_count() const { return _c1_count; } | |
| 61 int c2_count() const { return _c2_count; } | |
| 62 void set_c1_count(int x) { _c1_count = x; } | |
| 63 void set_c2_count(int x) { _c2_count = x; } | |
| 64 | |
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65 enum EventType { CALL, LOOP, COMPILE, REMOVE_FROM_QUEUE, UPDATE_IN_QUEUE, REPROFILE, MAKE_NOT_ENTRANT }; |
| 1783 | 66 void print_event(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level); |
| 67 // Print policy-specific information if necessary | |
| 68 virtual void print_specific(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level) { } | |
| 69 // Check if the method can be compiled, change level if necessary | |
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70 void compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread); |
| 1783 | 71 // Submit a given method for compilation |
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72 virtual void submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread); |
| 1783 | 73 // Simple methods are as good being compiled with C1 as C2. |
| 74 // This function tells if it's such a function. | |
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75 inline bool is_trivial(Method* method); |
| 1783 | 76 |
| 77 // Predicate helpers are used by .*_predicate() methods as well as others. | |
| 78 // They check the given counter values, multiplied by the scale against the thresholds. | |
| 79 template<CompLevel level> static inline bool call_predicate_helper(int i, int b, double scale); | |
| 80 template<CompLevel level> static inline bool loop_predicate_helper(int i, int b, double scale); | |
| 81 | |
| 82 // Get a compilation level for a given method. | |
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83 static CompLevel comp_level(Method* method) { |
| 1783 | 84 nmethod *nm = method->code(); |
| 85 if (nm != NULL && nm->is_in_use()) { | |
| 86 return (CompLevel)nm->comp_level(); | |
| 87 } | |
| 88 return CompLevel_none; | |
| 89 } | |
| 90 virtual void method_invocation_event(methodHandle method, methodHandle inlinee, | |
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91 CompLevel level, nmethod* nm, JavaThread* thread); |
| 1783 | 92 virtual void method_back_branch_event(methodHandle method, methodHandle inlinee, |
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93 int bci, CompLevel level, nmethod* nm, JavaThread* thread); |
| 1783 | 94 public: |
| 95 SimpleThresholdPolicy() : _c1_count(0), _c2_count(0) { } | |
| 96 virtual int compiler_count(CompLevel comp_level) { | |
| 97 if (is_c1_compile(comp_level)) return c1_count(); | |
| 98 if (is_c2_compile(comp_level)) return c2_count(); | |
| 99 return 0; | |
| 100 } | |
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101 virtual CompLevel initial_compile_level() { return MIN2((CompLevel)TieredStopAtLevel, CompLevel_initial_compile); } |
| 1783 | 102 virtual void do_safepoint_work() { } |
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103 virtual void delay_compilation(Method* method) { } |
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104 virtual void disable_compilation(Method* method) { } |
| 2252 | 105 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr); |
| 1783 | 106 virtual nmethod* event(methodHandle method, methodHandle inlinee, |
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107 int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread); |
| 1783 | 108 // Select task is called by CompileBroker. We should return a task or NULL. |
| 109 virtual CompileTask* select_task(CompileQueue* compile_queue); | |
| 110 // Tell the runtime if we think a given method is adequately profiled. | |
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111 virtual bool is_mature(Method* method); |
| 1783 | 112 // Initialize: set compiler thread count |
| 113 virtual void initialize(); | |
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114 virtual bool should_not_inline(ciEnv* env, ciMethod* callee) { |
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115 return (env->comp_level() == CompLevel_limited_profile || |
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116 env->comp_level() == CompLevel_full_profile) && |
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117 callee->has_loops(); |
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118 } |
| 1783 | 119 }; |
| 1972 | 120 |
| 121 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP |