Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/compilationPolicy.hpp @ 3979:4dfb2df418f2
6484982: G1: process references during evacuation pauses
Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
| author | johnc |
|---|---|
| date | Thu, 22 Sep 2011 10:57:37 -0700 |
| parents | 43f9d800f276 |
| children | 04b9a2566eec 20334ed5ed3c |
| rev | line source |
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| 0 | 1 /* |
| 1783 | 2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP |
| 26 #define SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP | |
| 27 | |
| 28 #include "code/nmethod.hpp" | |
| 29 #include "compiler/compileBroker.hpp" | |
| 30 #include "memory/allocation.hpp" | |
| 31 #include "runtime/vm_operations.hpp" | |
| 32 #include "utilities/growableArray.hpp" | |
| 33 | |
| 0 | 34 // The CompilationPolicy selects which method (if any) should be compiled. |
| 35 // It also decides which methods must always be compiled (i.e., are never | |
| 36 // interpreted). | |
| 1783 | 37 class CompileTask; |
| 38 class CompileQueue; | |
| 0 | 39 |
| 40 class CompilationPolicy : public CHeapObj { | |
| 41 static CompilationPolicy* _policy; | |
| 42 // Accumulated time | |
| 43 static elapsedTimer _accumulated_time; | |
| 44 | |
| 45 static bool _in_vm_startup; | |
| 1783 | 46 public: |
| 0 | 47 static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; } |
| 48 static void completed_vm_startup(); | |
| 1783 | 49 static bool delay_compilation_during_startup() { return _in_vm_startup; } |
| 0 | 50 |
| 1783 | 51 // m must be compiled before executing it |
| 52 static bool must_be_compiled(methodHandle m, int comp_level = CompLevel_all); | |
| 53 // m is allowed to be compiled | |
| 54 static bool can_be_compiled(methodHandle m, int comp_level = CompLevel_all); | |
| 55 static bool is_compilation_enabled(); | |
| 0 | 56 static void set_policy(CompilationPolicy* policy) { _policy = policy; } |
| 1783 | 57 static CompilationPolicy* policy() { return _policy; } |
| 0 | 58 |
| 59 // Profiling | |
| 60 elapsedTimer* accumulated_time() { return &_accumulated_time; } | |
| 61 void print_time() PRODUCT_RETURN; | |
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62 // Return initial compile level that is used with Xcomp |
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63 virtual CompLevel initial_compile_level() = 0; |
| 1783 | 64 virtual int compiler_count(CompLevel comp_level) = 0; |
| 65 // main notification entry, return a pointer to an nmethod if the OSR is required, | |
| 66 // returns NULL otherwise. | |
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67 virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, TRAPS) = 0; |
| 1783 | 68 // safepoint() is called at the end of the safepoint |
| 69 virtual void do_safepoint_work() = 0; | |
| 70 // reprofile request | |
| 71 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0; | |
| 72 // delay_compilation(method) can be called by any component of the runtime to notify the policy | |
| 73 // that it's recommended to delay the complation of this method. | |
| 74 virtual void delay_compilation(methodOop method) = 0; | |
| 75 // disable_compilation() is called whenever the runtime decides to disable compilation of the | |
| 76 // specified method. | |
| 77 virtual void disable_compilation(methodOop method) = 0; | |
| 78 // Select task is called by CompileBroker. The queue is guaranteed to have at least one | |
| 79 // element and is locked. The function should select one and return it. | |
| 80 virtual CompileTask* select_task(CompileQueue* compile_queue) = 0; | |
| 81 // Tell the runtime if we think a given method is adequately profiled. | |
| 82 virtual bool is_mature(methodOop method) = 0; | |
| 83 // Do policy initialization | |
| 84 virtual void initialize() = 0; | |
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85 virtual bool should_not_inline(ciEnv* env, ciMethod* method) { return false; } |
| 0 | 86 }; |
| 87 | |
| 1783 | 88 // A base class for baseline policies. |
| 89 class NonTieredCompPolicy : public CompilationPolicy { | |
| 90 int _compiler_count; | |
| 91 protected: | |
| 92 static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci); | |
| 93 static void trace_osr_request(methodHandle method, nmethod* osr, int bci); | |
| 94 static void trace_osr_completion(nmethod* osr_nm); | |
| 95 void reset_counter_for_invocation_event(methodHandle method); | |
| 96 void reset_counter_for_back_branch_event(methodHandle method); | |
| 97 public: | |
| 98 NonTieredCompPolicy() : _compiler_count(0) { } | |
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99 virtual CompLevel initial_compile_level() { return CompLevel_initial_compile; } |
| 1783 | 100 virtual int compiler_count(CompLevel comp_level); |
| 101 virtual void do_safepoint_work(); | |
| 102 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr); | |
| 103 virtual void delay_compilation(methodOop method); | |
| 104 virtual void disable_compilation(methodOop method); | |
| 105 virtual bool is_mature(methodOop method); | |
| 106 virtual void initialize(); | |
| 107 virtual CompileTask* select_task(CompileQueue* compile_queue); | |
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108 virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, TRAPS); |
| 1783 | 109 virtual void method_invocation_event(methodHandle m, TRAPS) = 0; |
| 110 virtual void method_back_branch_event(methodHandle m, int bci, TRAPS) = 0; | |
| 111 }; | |
| 112 | |
| 113 class SimpleCompPolicy : public NonTieredCompPolicy { | |
| 0 | 114 public: |
| 1783 | 115 virtual void method_invocation_event(methodHandle m, TRAPS); |
| 116 virtual void method_back_branch_event(methodHandle m, int bci, TRAPS); | |
| 0 | 117 }; |
| 118 | |
| 119 // StackWalkCompPolicy - existing C2 policy | |
| 120 | |
| 121 #ifdef COMPILER2 | |
| 1783 | 122 class StackWalkCompPolicy : public NonTieredCompPolicy { |
| 0 | 123 public: |
| 1783 | 124 virtual void method_invocation_event(methodHandle m, TRAPS); |
| 125 virtual void method_back_branch_event(methodHandle m, int bci, TRAPS); | |
| 0 | 126 |
| 127 private: | |
| 128 RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack); | |
| 129 RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack); | |
| 130 | |
| 131 // the following variables hold values computed by the last inlining decision | |
| 132 // they are used for performance debugging only (print better messages) | |
| 133 static const char* _msg; // reason for not inlining | |
| 134 | |
| 135 static const char* shouldInline (methodHandle callee, float frequency, int cnt); | |
| 136 // positive filter: should send be inlined? returns NULL (--> yes) or rejection msg | |
| 137 static const char* shouldNotInline(methodHandle callee); | |
| 138 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg | |
| 139 | |
| 140 }; | |
| 141 #endif | |
| 1972 | 142 |
| 143 #endif // SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP |