65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
/*
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "gc/g1/g1RegionMarkStatsCache.inline.hpp"
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#include "memory/allocation.inline.hpp"
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#include "utilities/powerOfTwo.hpp"
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G1RegionMarkStatsCache::G1RegionMarkStatsCache(G1RegionMarkStats* target, uint max_regions, uint num_cache_entries) :
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_target(target),
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_num_stats(max_regions),
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_cache(NULL),
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_num_cache_entries(num_cache_entries),
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_cache_hits(0),
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_cache_misses(0),
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_num_cache_entries_mask(_num_cache_entries - 1) {
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guarantee(is_power_of_2(num_cache_entries),
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"Number of cache entries must be power of two, but is %u", num_cache_entries);
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_cache = NEW_C_HEAP_ARRAY(G1RegionMarkStatsCacheEntry, _num_cache_entries, mtGC);
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}
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G1RegionMarkStatsCache::~G1RegionMarkStatsCache() {
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FREE_C_HEAP_ARRAY(G1RegionMarkStatsCacheEntry, _cache);
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}
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// Evict all remaining statistics, returning cache hits and misses.
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Pair<size_t, size_t> G1RegionMarkStatsCache::evict_all() {
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for (uint i = 0; i < _num_cache_entries; i++) {
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evict(i);
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}
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return Pair<size_t,size_t>(_cache_hits, _cache_misses);
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}
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// Reset all cache entries to their default values.
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void G1RegionMarkStatsCache::reset() {
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_cache_hits = 0;
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_cache_misses = 0;
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for (uint i = 0; i < _num_cache_entries; i++) {
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_cache[i].clear();
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}
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}
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