Mercurial > hg > graal-compiler
view src/share/vm/oops/typeArrayOop.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 | b92c45f2bc75 |
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/* * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. * 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_OOPS_TYPEARRAYOOP_HPP #define SHARE_VM_OOPS_TYPEARRAYOOP_HPP #include "oops/arrayOop.hpp" #include "oops/typeArrayKlass.hpp" #ifdef TARGET_OS_ARCH_linux_x86 # include "orderAccess_linux_x86.inline.hpp" #endif #ifdef TARGET_OS_ARCH_linux_sparc # include "orderAccess_linux_sparc.inline.hpp" #endif #ifdef TARGET_OS_ARCH_linux_zero # include "orderAccess_linux_zero.inline.hpp" #endif #ifdef TARGET_OS_ARCH_solaris_x86 # include "orderAccess_solaris_x86.inline.hpp" #endif #ifdef TARGET_OS_ARCH_solaris_sparc # include "orderAccess_solaris_sparc.inline.hpp" #endif #ifdef TARGET_OS_ARCH_windows_x86 # include "orderAccess_windows_x86.inline.hpp" #endif // A typeArrayOop is an array containing basic types (non oop elements). // It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs} #include <limits.h> class typeArrayOopDesc : public arrayOopDesc { protected: jchar* char_base() const { return (jchar*) base(T_CHAR); } jboolean* bool_base() const { return (jboolean*)base(T_BOOLEAN); } jbyte* byte_base() const { return (jbyte*) base(T_BYTE); } jint* int_base() const { return (jint*) base(T_INT); } jlong* long_base() const { return (jlong*) base(T_LONG); } jshort* short_base() const { return (jshort*) base(T_SHORT); } jfloat* float_base() const { return (jfloat*) base(T_FLOAT); } jdouble* double_base() const { return (jdouble*) base(T_DOUBLE); } friend class typeArrayKlass; public: jbyte* byte_at_addr(int which) const { assert(is_within_bounds(which), "index out of bounds"); return &byte_base()[which]; } jboolean* bool_at_addr(int which) const { assert(is_within_bounds(which), "index out of bounds"); return &bool_base()[which]; } jchar* char_at_addr(int which) const { assert(is_within_bounds(which), "index out of bounds"); return &char_base()[which]; } jint* int_at_addr(int which) const { assert(is_within_bounds(which), "index out of bounds"); return &int_base()[which]; } jshort* short_at_addr(int which) const { assert(is_within_bounds(which), "index out of bounds"); return &short_base()[which]; } jushort* ushort_at_addr(int which) const { // for field descriptor arrays assert(is_within_bounds(which), "index out of bounds"); return (jushort*) &short_base()[which]; } jlong* long_at_addr(int which) const { assert(is_within_bounds(which), "index out of bounds"); return &long_base()[which]; } jfloat* float_at_addr(int which) const { assert(is_within_bounds(which), "index out of bounds"); return &float_base()[which]; } jdouble* double_at_addr(int which) const { assert(is_within_bounds(which), "index out of bounds"); return &double_base()[which]; } jbyte byte_at(int which) const { return *byte_at_addr(which); } void byte_at_put(int which, jbyte contents) { *byte_at_addr(which) = contents; } jboolean bool_at(int which) const { return *bool_at_addr(which); } void bool_at_put(int which, jboolean contents) { *bool_at_addr(which) = contents; } jchar char_at(int which) const { return *char_at_addr(which); } void char_at_put(int which, jchar contents) { *char_at_addr(which) = contents; } jint int_at(int which) const { return *int_at_addr(which); } void int_at_put(int which, jint contents) { *int_at_addr(which) = contents; } jshort short_at(int which) const { return *short_at_addr(which); } void short_at_put(int which, jshort contents) { *short_at_addr(which) = contents; } jushort ushort_at(int which) const { return *ushort_at_addr(which); } void ushort_at_put(int which, jushort contents) { *ushort_at_addr(which) = contents; } jlong long_at(int which) const { return *long_at_addr(which); } void long_at_put(int which, jlong contents) { *long_at_addr(which) = contents; } jfloat float_at(int which) const { return *float_at_addr(which); } void float_at_put(int which, jfloat contents) { *float_at_addr(which) = contents; } jdouble double_at(int which) const { return *double_at_addr(which); } void double_at_put(int which, jdouble contents) { *double_at_addr(which) = contents; } jbyte byte_at_acquire(int which) const { return OrderAccess::load_acquire(byte_at_addr(which)); } void release_byte_at_put(int which, jbyte contents) { OrderAccess::release_store(byte_at_addr(which), contents); } // Sizing // Returns the number of words necessary to hold an array of "len" // elements each of the given "byte_size". private: static int object_size(int lh, int length) { int instance_header_size = Klass::layout_helper_header_size(lh); int element_shift = Klass::layout_helper_log2_element_size(lh); DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh)); assert(length <= arrayOopDesc::max_array_length(etype), "no overflow"); julong size_in_bytes = length; size_in_bytes <<= element_shift; size_in_bytes += instance_header_size; julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize); assert(size_in_words <= (julong)max_jint, "no overflow"); return align_object_size((intptr_t)size_in_words); } public: int object_size() { typeArrayKlass* tk = typeArrayKlass::cast(klass()); return object_size(tk->layout_helper(), length()); } }; #endif // SHARE_VM_OOPS_TYPEARRAYOOP_HPP