Mercurial > hg > graal-jvmci-8
comparison src/share/vm/runtime/simpleThresholdPolicy.hpp @ 1805:a25394352030
Merge
author | kamg |
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date | Wed, 22 Sep 2010 12:54:51 -0400 |
parents | d5d065957597 |
children | f95d63e2154a |
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1804:2966dab85b3e | 1805:a25394352030 |
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1 /* | |
2 * Copyright (c) 2001, 2010, 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 class CompileTask; | |
26 class CompileQueue; | |
27 | |
28 class SimpleThresholdPolicy : public CompilationPolicy { | |
29 int _c1_count, _c2_count; | |
30 | |
31 // Check if the counter is big enough and set carry (effectively infinity). | |
32 inline void set_carry_if_necessary(InvocationCounter *counter); | |
33 // Set carry flags in the counters (in methodOop and MDO). | |
34 inline void handle_counter_overflow(methodOop method); | |
35 // Call and loop predicates determine whether a transition to a higher compilation | |
36 // level should be performed (pointers to predicate functions are passed to common_TF(). | |
37 // Predicates also take compiler load into account. | |
38 typedef bool (SimpleThresholdPolicy::*Predicate)(int i, int b, CompLevel cur_level); | |
39 bool call_predicate(int i, int b, CompLevel cur_level); | |
40 bool loop_predicate(int i, int b, CompLevel cur_level); | |
41 // Common transition function. Given a predicate determines if a method should transition to another level. | |
42 CompLevel common(Predicate p, methodOop method, CompLevel cur_level); | |
43 // Transition functions. | |
44 // call_event determines if a method should be compiled at a different | |
45 // level with a regular invocation entry. | |
46 CompLevel call_event(methodOop method, CompLevel cur_level); | |
47 // loop_event checks if a method should be OSR compiled at a different | |
48 // level. | |
49 CompLevel loop_event(methodOop method, CompLevel cur_level); | |
50 | |
51 protected: | |
52 int c1_count() const { return _c1_count; } | |
53 int c2_count() const { return _c2_count; } | |
54 void set_c1_count(int x) { _c1_count = x; } | |
55 void set_c2_count(int x) { _c2_count = x; } | |
56 | |
57 enum EventType { CALL, LOOP, COMPILE }; | |
58 void print_event(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level); | |
59 // Print policy-specific information if necessary | |
60 virtual void print_specific(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level) { } | |
61 // Check if the method can be compiled, change level if necessary | |
62 void compile(methodHandle mh, int bci, CompLevel level, TRAPS); | |
63 // Submit a given method for compilation | |
64 virtual void submit_compile(methodHandle mh, int bci, CompLevel level, TRAPS); | |
65 // Simple methods are as good being compiled with C1 as C2. | |
66 // This function tells if it's such a function. | |
67 inline bool is_trivial(methodOop method); | |
68 | |
69 // Predicate helpers are used by .*_predicate() methods as well as others. | |
70 // They check the given counter values, multiplied by the scale against the thresholds. | |
71 template<CompLevel level> static inline bool call_predicate_helper(int i, int b, double scale); | |
72 template<CompLevel level> static inline bool loop_predicate_helper(int i, int b, double scale); | |
73 | |
74 // Get a compilation level for a given method. | |
75 static CompLevel comp_level(methodOop method) { | |
76 nmethod *nm = method->code(); | |
77 if (nm != NULL && nm->is_in_use()) { | |
78 return (CompLevel)nm->comp_level(); | |
79 } | |
80 return CompLevel_none; | |
81 } | |
82 virtual void method_invocation_event(methodHandle method, methodHandle inlinee, | |
83 CompLevel level, TRAPS); | |
84 virtual void method_back_branch_event(methodHandle method, methodHandle inlinee, | |
85 int bci, CompLevel level, TRAPS); | |
86 public: | |
87 SimpleThresholdPolicy() : _c1_count(0), _c2_count(0) { } | |
88 virtual int compiler_count(CompLevel comp_level) { | |
89 if (is_c1_compile(comp_level)) return c1_count(); | |
90 if (is_c2_compile(comp_level)) return c2_count(); | |
91 return 0; | |
92 } | |
93 virtual void do_safepoint_work() { } | |
94 virtual void delay_compilation(methodOop method) { } | |
95 virtual void disable_compilation(methodOop method) { } | |
96 // TODO: we should honour reprofiling requests in the future. Currently reprofiling | |
97 // would happen but not to the extent we would ideally like. | |
98 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) { } | |
99 virtual nmethod* event(methodHandle method, methodHandle inlinee, | |
100 int branch_bci, int bci, CompLevel comp_level, TRAPS); | |
101 // Select task is called by CompileBroker. We should return a task or NULL. | |
102 virtual CompileTask* select_task(CompileQueue* compile_queue); | |
103 // Tell the runtime if we think a given method is adequately profiled. | |
104 virtual bool is_mature(methodOop method); | |
105 // Initialize: set compiler thread count | |
106 virtual void initialize(); | |
107 }; |