Mercurial > hg > graal-compiler
view src/share/vm/shark/sharkStateScanner.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 |
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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_SHARKSTATESCANNER_HPP #define SHARE_VM_SHARK_SHARKSTATESCANNER_HPP #include "memory/allocation.hpp" #include "shark/llvmHeaders.hpp" #include "shark/sharkFunction.hpp" #include "shark/sharkInvariants.hpp" class SharkState; class SharkStateScanner : public SharkTargetInvariants { protected: SharkStateScanner(SharkFunction* function) : SharkTargetInvariants(function), _stack(function->stack()) {} private: SharkStack* _stack; protected: SharkStack* stack() const { return _stack; } // Scan the frame public: void scan(SharkState* state); // Callbacks // Note that the offsets supplied to the various process_* callbacks // are specified in wordSize words from the frame's unextended_sp. protected: virtual void start_frame() {} virtual void start_stack(int stack_depth) {} virtual void process_stack_slot(int index, SharkValue** value, int offset) {} virtual void end_stack() {} virtual void start_monitors(int num_monitors) {} virtual void process_monitor(int index, int box_offset, int obj_offset) {} virtual void end_monitors() {} virtual void start_frame_header() {} virtual void process_oop_tmp_slot(llvm::Value** value, int offset) {} virtual void process_method_slot(llvm::Value** value, int offset) {} virtual void process_pc_slot(int offset) {} virtual void end_frame_header() {} virtual void start_locals() {} virtual void process_local_slot(int index, SharkValue** value, int offset) {} virtual void end_locals() {} virtual void end_frame() {} // Integrity checks private: void stack_integrity_checks(SharkState* state) PRODUCT_RETURN; void locals_integrity_checks(SharkState* state) PRODUCT_RETURN; }; #endif // SHARE_VM_SHARK_SHARKSTATESCANNER_HPP