Mercurial > hg > graal-compiler
view src/share/vm/shark/sharkCompiler.hpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | f95d63e2154a |
children | e863062e521d |
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/* * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2008, 2009 Red Hat, Inc. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_SHARK_SHARKCOMPILER_HPP #define SHARE_VM_SHARK_SHARKCOMPILER_HPP #include "ci/ciEnv.hpp" #include "ci/ciMethod.hpp" #include "compiler/abstractCompiler.hpp" #include "compiler/compileBroker.hpp" #include "shark/llvmHeaders.hpp" #include "shark/sharkMemoryManager.hpp" class SharkContext; class SharkCompiler : public AbstractCompiler { public: // Creation SharkCompiler(); // Name of this compiler const char *name() { return "shark"; } // Missing feature tests bool supports_native() { return true; } bool supports_osr() { return true; } // Customization bool needs_adapters() { return false; } bool needs_stubs() { return false; } // Initialization void initialize(); // Compile a normal (bytecode) method and install it in the VM void compile_method(ciEnv* env, ciMethod* target, int entry_bci); // Generate a wrapper for a native (JNI) method nmethod* generate_native_wrapper(MacroAssembler* masm, methodHandle target, BasicType* arg_types, BasicType return_type); // Free compiled methods (and native wrappers) void free_compiled_method(address code); // Each thread generating IR needs its own context. The normal // context is used for bytecode methods, and is protected from // multiple simultaneous accesses by being restricted to the // compiler thread. The native context is used for JNI methods, // and is protected from multiple simultaneous accesses by the // adapter handler library lock. private: SharkContext* _normal_context; SharkContext* _native_context; public: SharkContext* context() const { if (JavaThread::current()->is_Compiler_thread()) { return _normal_context; } else { assert(AdapterHandlerLibrary_lock->owned_by_self(), "should be"); return _native_context; } } // The LLVM execution engine is the JIT we use to generate native // code. It is thread safe, but we need to protect it with a lock // of our own because otherwise LLVM's lock and HotSpot's locks // interleave and deadlock. The SharkMemoryManager is not thread // safe, and is protected by the same lock as the execution engine. private: Monitor* _execution_engine_lock; SharkMemoryManager* _memory_manager; llvm::ExecutionEngine* _execution_engine; private: Monitor* execution_engine_lock() const { return _execution_engine_lock; } SharkMemoryManager* memory_manager() const { assert(execution_engine_lock()->owned_by_self(), "should be"); return _memory_manager; } llvm::ExecutionEngine* execution_engine() const { assert(execution_engine_lock()->owned_by_self(), "should be"); return _execution_engine; } // Global access public: static SharkCompiler* compiler() { AbstractCompiler *compiler = CompileBroker::compiler(CompLevel_simple); assert(compiler->is_shark() && compiler->is_initialized(), "should be"); return (SharkCompiler *) compiler; } // Helpers private: static const char* methodname(const char* klass, const char* method); void generate_native_code(SharkEntry* entry, llvm::Function* function, const char* name); void free_queued_methods(); }; #endif // SHARE_VM_SHARK_SHARKCOMPILER_HPP