Mercurial > hg > graal-compiler
view src/share/vm/oops/symbolKlass.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) 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_SYMBOLKLASS_HPP #define SHARE_VM_OOPS_SYMBOLKLASS_HPP #include "oops/typeArrayKlass.hpp" // a symbolKlass is the klass for a symbolOop class symbolKlass : public Klass { friend class VMStructs; private: juint _alloc_size; // allocation profiling support public: // Allocation DEFINE_ALLOCATE_PERMANENT(symbolKlass); static klassOop create_klass(TRAPS); symbolOop allocate_symbol(u1* name, int len, TRAPS); // Assumes no characters larger than 0x7F bool allocate_symbols(int names_count, const char** names, int* lengths, symbolOop* sym_oops, TRAPS); // Test operation bool oop_is_symbol() const { return true; } // Casting from klassOop static symbolKlass* cast(klassOop k) { assert(k->klass_part()->oop_is_symbol(), "cast to symbolKlass"); return (symbolKlass*) k->klass_part(); } static int header_size() { return oopDesc::header_size() + sizeof(symbolKlass)/HeapWordSize; } int oop_size(oop obj) const; int klass_oop_size() const { return object_size(); } int object_size() const { return align_object_size(header_size()); } // Garbage collection void oop_follow_contents(oop obj); int oop_adjust_pointers(oop obj); bool oop_is_parsable(oop obj) const; // Parallel Scavenge and Parallel Old PARALLEL_GC_DECLS // Allocation profiling support juint alloc_size() const { return _alloc_size; } void set_alloc_size(juint n) { _alloc_size = n; } // Iterators int oop_oop_iterate(oop obj, OopClosure* blk); int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); // Printing void oop_print_value_on(oop obj, outputStream* st); #ifndef PRODUCT void oop_print_on(oop obj, outputStream* st); #endif //PRODUCT const char* internal_name() const; }; #endif // SHARE_VM_OOPS_SYMBOLKLASS_HPP