|
1 /* |
|
2 * Copyright (c) 2010, 2017, Oracle and/or its affiliates. All rights reserved. |
|
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 |
|
25 #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP |
|
26 #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP |
|
27 |
|
28 #include "code/nmethod.hpp" |
|
29 #include "oops/methodData.hpp" |
|
30 #include "runtime/compilationPolicy.hpp" |
|
31 #include "utilities/globalDefinitions.hpp" |
|
32 |
|
33 #ifdef TIERED |
|
34 |
|
35 class CompileTask; |
|
36 class CompileQueue; |
|
37 |
|
38 class SimpleThresholdPolicy : public CompilationPolicy { |
|
39 int _c1_count, _c2_count; |
|
40 |
|
41 // Check if the counter is big enough and set carry (effectively infinity). |
|
42 inline void set_carry_if_necessary(InvocationCounter *counter); |
|
43 // Set carry flags in the counters (in Method* and MDO). |
|
44 inline void handle_counter_overflow(Method* method); |
|
45 // Call and loop predicates determine whether a transition to a higher compilation |
|
46 // level should be performed (pointers to predicate functions are passed to common_TF(). |
|
47 // Predicates also take compiler load into account. |
|
48 typedef bool (SimpleThresholdPolicy::*Predicate)(int i, int b, CompLevel cur_level, Method* method); |
|
49 bool call_predicate(int i, int b, CompLevel cur_level, Method* method); |
|
50 bool loop_predicate(int i, int b, CompLevel cur_level, Method* method); |
|
51 // Common transition function. Given a predicate determines if a method should transition to another level. |
|
52 CompLevel common(Predicate p, Method* method, CompLevel cur_level); |
|
53 // Transition functions. |
|
54 // call_event determines if a method should be compiled at a different |
|
55 // level with a regular invocation entry. |
|
56 CompLevel call_event(Method* method, CompLevel cur_level, JavaThread* thread); |
|
57 // loop_event checks if a method should be OSR compiled at a different |
|
58 // level. |
|
59 CompLevel loop_event(Method* method, CompLevel cur_level, JavaThread* thread); |
|
60 void print_counters(const char* prefix, const methodHandle& mh); |
|
61 protected: |
|
62 int c1_count() const { return _c1_count; } |
|
63 int c2_count() const { return _c2_count; } |
|
64 void set_c1_count(int x) { _c1_count = x; } |
|
65 void set_c2_count(int x) { _c2_count = x; } |
|
66 |
|
67 enum EventType { CALL, LOOP, COMPILE, REMOVE_FROM_QUEUE, UPDATE_IN_QUEUE, REPROFILE, MAKE_NOT_ENTRANT }; |
|
68 void print_event(EventType type, const methodHandle& mh, const methodHandle& imh, int bci, CompLevel level); |
|
69 // Print policy-specific information if necessary |
|
70 virtual void print_specific(EventType type, const methodHandle& mh, const methodHandle& imh, int bci, CompLevel level) { } |
|
71 // Check if the method can be compiled, change level if necessary |
|
72 void compile(const methodHandle& mh, int bci, CompLevel level, JavaThread* thread); |
|
73 // Submit a given method for compilation |
|
74 virtual void submit_compile(const methodHandle& mh, int bci, CompLevel level, JavaThread* thread); |
|
75 // Simple methods are as good being compiled with C1 as C2. |
|
76 // This function tells if it's such a function. |
|
77 inline bool is_trivial(Method* method); |
|
78 |
|
79 // Predicate helpers are used by .*_predicate() methods as well as others. |
|
80 // They check the given counter values, multiplied by the scale against the thresholds. |
|
81 template<CompLevel level> static inline bool call_predicate_helper(int i, int b, double scale, Method* method); |
|
82 template<CompLevel level> static inline bool loop_predicate_helper(int i, int b, double scale, Method* method); |
|
83 |
|
84 // Get a compilation level for a given method. |
|
85 static CompLevel comp_level(Method* method) { |
|
86 CompiledMethod *nm = method->code(); |
|
87 if (nm != NULL && nm->is_in_use()) { |
|
88 return (CompLevel)nm->comp_level(); |
|
89 } |
|
90 return CompLevel_none; |
|
91 } |
|
92 virtual void method_invocation_event(const methodHandle& method, const methodHandle& inlinee, |
|
93 CompLevel level, CompiledMethod* nm, JavaThread* thread); |
|
94 virtual void method_back_branch_event(const methodHandle& method, const methodHandle& inlinee, |
|
95 int bci, CompLevel level, CompiledMethod* nm, JavaThread* thread); |
|
96 public: |
|
97 SimpleThresholdPolicy() : _c1_count(0), _c2_count(0) { } |
|
98 virtual int compiler_count(CompLevel comp_level) { |
|
99 if (is_c1_compile(comp_level)) return c1_count(); |
|
100 if (is_c2_compile(comp_level)) return c2_count(); |
|
101 return 0; |
|
102 } |
|
103 virtual CompLevel initial_compile_level() { return MIN2((CompLevel)TieredStopAtLevel, CompLevel_initial_compile); } |
|
104 virtual void do_safepoint_work() { } |
|
105 virtual void delay_compilation(Method* method) { } |
|
106 virtual void disable_compilation(Method* method) { } |
|
107 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr); |
|
108 virtual nmethod* event(const methodHandle& method, const methodHandle& inlinee, |
|
109 int branch_bci, int bci, CompLevel comp_level, CompiledMethod* nm, JavaThread* thread); |
|
110 // Select task is called by CompileBroker. We should return a task or NULL. |
|
111 virtual CompileTask* select_task(CompileQueue* compile_queue); |
|
112 // Tell the runtime if we think a given method is adequately profiled. |
|
113 virtual bool is_mature(Method* method); |
|
114 // Initialize: set compiler thread count |
|
115 virtual void initialize(); |
|
116 virtual bool should_not_inline(ciEnv* env, ciMethod* callee) { |
|
117 return (env->comp_level() == CompLevel_limited_profile || |
|
118 env->comp_level() == CompLevel_full_profile) && |
|
119 callee->has_loops(); |
|
120 } |
|
121 }; |
|
122 |
|
123 #endif // TIERED |
|
124 |
|
125 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP |