1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/runtime/compilationPolicy.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,145 @@
1.4 +/*
1.5 + * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
1.29 +#define SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
1.30 +
1.31 +#include "code/nmethod.hpp"
1.32 +#include "compiler/compileBroker.hpp"
1.33 +#include "memory/allocation.hpp"
1.34 +#include "runtime/vm_operations.hpp"
1.35 +#include "utilities/growableArray.hpp"
1.36 +
1.37 +// The CompilationPolicy selects which method (if any) should be compiled.
1.38 +// It also decides which methods must always be compiled (i.e., are never
1.39 +// interpreted).
1.40 +class CompileTask;
1.41 +class CompileQueue;
1.42 +
1.43 +class CompilationPolicy : public CHeapObj<mtCompiler> {
1.44 + static CompilationPolicy* _policy;
1.45 + // Accumulated time
1.46 + static elapsedTimer _accumulated_time;
1.47 +
1.48 + static bool _in_vm_startup;
1.49 +public:
1.50 + static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; }
1.51 + static void completed_vm_startup();
1.52 + static bool delay_compilation_during_startup() { return _in_vm_startup; }
1.53 +
1.54 + // m must be compiled before executing it
1.55 + static bool must_be_compiled(methodHandle m, int comp_level = CompLevel_all);
1.56 + // m is allowed to be compiled
1.57 + static bool can_be_compiled(methodHandle m, int comp_level = CompLevel_all);
1.58 + // m is allowed to be osr compiled
1.59 + static bool can_be_osr_compiled(methodHandle m, int comp_level = CompLevel_all);
1.60 + static bool is_compilation_enabled();
1.61 + static void set_policy(CompilationPolicy* policy) { _policy = policy; }
1.62 + static CompilationPolicy* policy() { return _policy; }
1.63 +
1.64 + // Profiling
1.65 + elapsedTimer* accumulated_time() { return &_accumulated_time; }
1.66 + void print_time() PRODUCT_RETURN;
1.67 + // Return initial compile level that is used with Xcomp
1.68 + virtual CompLevel initial_compile_level() = 0;
1.69 + virtual int compiler_count(CompLevel comp_level) = 0;
1.70 + // main notification entry, return a pointer to an nmethod if the OSR is required,
1.71 + // returns NULL otherwise.
1.72 + virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) = 0;
1.73 + // safepoint() is called at the end of the safepoint
1.74 + virtual void do_safepoint_work() = 0;
1.75 + // reprofile request
1.76 + virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0;
1.77 + // delay_compilation(method) can be called by any component of the runtime to notify the policy
1.78 + // that it's recommended to delay the complation of this method.
1.79 + virtual void delay_compilation(Method* method) = 0;
1.80 + // disable_compilation() is called whenever the runtime decides to disable compilation of the
1.81 + // specified method.
1.82 + virtual void disable_compilation(Method* method) = 0;
1.83 + // Select task is called by CompileBroker. The queue is guaranteed to have at least one
1.84 + // element and is locked. The function should select one and return it.
1.85 + virtual CompileTask* select_task(CompileQueue* compile_queue) = 0;
1.86 + // Tell the runtime if we think a given method is adequately profiled.
1.87 + virtual bool is_mature(Method* method) = 0;
1.88 + // Do policy initialization
1.89 + virtual void initialize() = 0;
1.90 + virtual bool should_not_inline(ciEnv* env, ciMethod* method) { return false; }
1.91 +};
1.92 +
1.93 +// A base class for baseline policies.
1.94 +class NonTieredCompPolicy : public CompilationPolicy {
1.95 + int _compiler_count;
1.96 +protected:
1.97 + static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci);
1.98 + static void trace_osr_request(methodHandle method, nmethod* osr, int bci);
1.99 + static void trace_osr_completion(nmethod* osr_nm);
1.100 + void reset_counter_for_invocation_event(methodHandle method);
1.101 + void reset_counter_for_back_branch_event(methodHandle method);
1.102 +public:
1.103 + NonTieredCompPolicy() : _compiler_count(0) { }
1.104 + virtual CompLevel initial_compile_level() { return CompLevel_highest_tier; }
1.105 + virtual int compiler_count(CompLevel comp_level);
1.106 + virtual void do_safepoint_work();
1.107 + virtual void reprofile(ScopeDesc* trap_scope, bool is_osr);
1.108 + virtual void delay_compilation(Method* method);
1.109 + virtual void disable_compilation(Method* method);
1.110 + virtual bool is_mature(Method* method);
1.111 + virtual void initialize();
1.112 + virtual CompileTask* select_task(CompileQueue* compile_queue);
1.113 + virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread);
1.114 + virtual void method_invocation_event(methodHandle m, JavaThread* thread) = 0;
1.115 + virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread) = 0;
1.116 +};
1.117 +
1.118 +class SimpleCompPolicy : public NonTieredCompPolicy {
1.119 + public:
1.120 + virtual void method_invocation_event(methodHandle m, JavaThread* thread);
1.121 + virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread);
1.122 +};
1.123 +
1.124 +// StackWalkCompPolicy - existing C2 policy
1.125 +
1.126 +#ifdef COMPILER2
1.127 +class StackWalkCompPolicy : public NonTieredCompPolicy {
1.128 + public:
1.129 + virtual void method_invocation_event(methodHandle m, JavaThread* thread);
1.130 + virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread);
1.131 +
1.132 + private:
1.133 + RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack);
1.134 + RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack);
1.135 +
1.136 + // the following variables hold values computed by the last inlining decision
1.137 + // they are used for performance debugging only (print better messages)
1.138 + static const char* _msg; // reason for not inlining
1.139 +
1.140 + static const char* shouldInline (methodHandle callee, float frequency, int cnt);
1.141 + // positive filter: should send be inlined? returns NULL (--> yes) or rejection msg
1.142 + static const char* shouldNotInline(methodHandle callee);
1.143 + // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg
1.144 +
1.145 +};
1.146 +#endif
1.147 +
1.148 +#endif // SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
