Mercurial > hg > truffle
diff src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.hpp @ 6885:685df3c6f84b
7045397: NPG: Add freelists to class loader arenas.
Reviewed-by: coleenp, stefank, jprovino, ohair
author | jmasa |
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date | Tue, 18 Sep 2012 23:35:42 -0700 |
parents | |
children | 7c5a1b62f53d |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.hpp Tue Sep 18 23:35:42 2012 -0700 @@ -0,0 +1,232 @@ +/* + * Copyright (c) 2001, 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_MEMORY_ADAPTIVEFREELIST_HPP +#define SHARE_VM_MEMORY_ADAPTIVEFREELIST_HPP + +#include "memory/freeList.hpp" +#include "gc_implementation/shared/allocationStats.hpp" + +class CompactibleFreeListSpace; + +// A class for maintaining a free list of Chunk's. The FreeList +// maintains a the structure of the list (head, tail, etc.) plus +// statistics for allocations from the list. The links between items +// are not part of FreeList. The statistics are +// used to make decisions about coalescing Chunk's when they +// are swept during collection. +// +// See the corresponding .cpp file for a description of the specifics +// for that implementation. + +class Mutex; + +template <class Chunk> +class AdaptiveFreeList : public FreeList<Chunk> { + friend class CompactibleFreeListSpace; + friend class VMStructs; + // friend class PrintTreeCensusClosure<Chunk, FreeList_t>; + + size_t _hint; // next larger size list with a positive surplus + + AllocationStats _allocation_stats; // allocation-related statistics + + public: + + AdaptiveFreeList(); + AdaptiveFreeList(Chunk* fc); + + using FreeList<Chunk>::assert_proper_lock_protection; +#ifdef ASSERT + using FreeList<Chunk>::protecting_lock; +#endif + using FreeList<Chunk>::count; + using FreeList<Chunk>::size; + using FreeList<Chunk>::verify_chunk_in_free_list; + using FreeList<Chunk>::getFirstNChunksFromList; + using FreeList<Chunk>::print_on; + void return_chunk_at_head(Chunk* fc, bool record_return); + void return_chunk_at_head(Chunk* fc); + void return_chunk_at_tail(Chunk* fc, bool record_return); + void return_chunk_at_tail(Chunk* fc); + using FreeList<Chunk>::return_chunk_at_tail; + using FreeList<Chunk>::remove_chunk; + using FreeList<Chunk>::prepend; + using FreeList<Chunk>::print_labels_on; + using FreeList<Chunk>::get_chunk_at_head; + + // Initialize. + void initialize(); + + // Reset the head, tail, hint, and count of a free list. + void reset(size_t hint); + + void assert_proper_lock_protection_work() const PRODUCT_RETURN; + + void print_on(outputStream* st, const char* c = NULL) const; + + size_t hint() const { + return _hint; + } + void set_hint(size_t v) { + assert_proper_lock_protection(); + assert(v == 0 || size() < v, "Bad hint"); + _hint = v; + } + + size_t get_better_size(); + + // Accessors for statistics + void init_statistics(bool split_birth = false); + + AllocationStats* allocation_stats() { + assert_proper_lock_protection(); + return &_allocation_stats; + } + + ssize_t desired() const { + return _allocation_stats.desired(); + } + void set_desired(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_desired(v); + } + void compute_desired(float inter_sweep_current, + float inter_sweep_estimate, + float intra_sweep_estimate) { + assert_proper_lock_protection(); + _allocation_stats.compute_desired(count(), + inter_sweep_current, + inter_sweep_estimate, + intra_sweep_estimate); + } + ssize_t coal_desired() const { + return _allocation_stats.coal_desired(); + } + void set_coal_desired(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_coal_desired(v); + } + + ssize_t surplus() const { + return _allocation_stats.surplus(); + } + void set_surplus(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_surplus(v); + } + void increment_surplus() { + assert_proper_lock_protection(); + _allocation_stats.increment_surplus(); + } + void decrement_surplus() { + assert_proper_lock_protection(); + _allocation_stats.decrement_surplus(); + } + + ssize_t bfr_surp() const { + return _allocation_stats.bfr_surp(); + } + void set_bfr_surp(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_bfr_surp(v); + } + ssize_t prev_sweep() const { + return _allocation_stats.prev_sweep(); + } + void set_prev_sweep(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_prev_sweep(v); + } + ssize_t before_sweep() const { + return _allocation_stats.before_sweep(); + } + void set_before_sweep(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_before_sweep(v); + } + + ssize_t coal_births() const { + return _allocation_stats.coal_births(); + } + void set_coal_births(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_coal_births(v); + } + void increment_coal_births() { + assert_proper_lock_protection(); + _allocation_stats.increment_coal_births(); + } + + ssize_t coal_deaths() const { + return _allocation_stats.coal_deaths(); + } + void set_coal_deaths(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_coal_deaths(v); + } + void increment_coal_deaths() { + assert_proper_lock_protection(); + _allocation_stats.increment_coal_deaths(); + } + + ssize_t split_births() const { + return _allocation_stats.split_births(); + } + void set_split_births(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_split_births(v); + } + void increment_split_births() { + assert_proper_lock_protection(); + _allocation_stats.increment_split_births(); + } + + ssize_t split_deaths() const { + return _allocation_stats.split_deaths(); + } + void set_split_deaths(ssize_t v) { + assert_proper_lock_protection(); + _allocation_stats.set_split_deaths(v); + } + void increment_split_deaths() { + assert_proper_lock_protection(); + _allocation_stats.increment_split_deaths(); + } + +#ifndef PRODUCT + // For debugging. The "_returned_bytes" in all the lists are summed + // and compared with the total number of bytes swept during a + // collection. + size_t returned_bytes() const { return _allocation_stats.returned_bytes(); } + void set_returned_bytes(size_t v) { _allocation_stats.set_returned_bytes(v); } + void increment_returned_bytes_by(size_t v) { + _allocation_stats.set_returned_bytes(_allocation_stats.returned_bytes() + v); + } + // Stats verification + void verify_stats() const; +#endif // NOT PRODUCT +}; + +#endif // SHARE_VM_MEMORY_ADAPTIVEFREELIST_HPP