fd0d572bb5
Lazily initialize G1FromCardCache to save on startup footprint if AlwaysPretouch is disabled. Reviewed-by: sjohanss, redestad
86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
/*
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* Copyright (c) 2001, 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/g1FromCardCache.hpp"
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#include "gc/g1/g1RemSet.hpp"
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#include "memory/padded.inline.hpp"
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#include "utilities/debug.hpp"
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uintptr_t** G1FromCardCache::_cache = NULL;
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uint G1FromCardCache::_max_regions = 0;
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size_t G1FromCardCache::_static_mem_size = 0;
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#ifdef ASSERT
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uint G1FromCardCache::_max_workers = 0;
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#endif
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void G1FromCardCache::initialize(uint num_par_rem_sets, uint max_num_regions) {
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guarantee(max_num_regions > 0, "Heap size must be valid");
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guarantee(_cache == NULL, "Should not call this multiple times");
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_max_regions = max_num_regions;
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#ifdef ASSERT
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_max_workers = num_par_rem_sets;
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#endif
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_cache = Padded2DArray<uintptr_t, mtGC>::create_unfreeable(_max_regions,
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num_par_rem_sets,
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&_static_mem_size);
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if (AlwaysPreTouch) {
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invalidate(0, _max_regions);
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}
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}
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void G1FromCardCache::invalidate(uint start_idx, size_t new_num_regions) {
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guarantee((size_t)start_idx + new_num_regions <= max_uintx,
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"Trying to invalidate beyond maximum region, from %u size " SIZE_FORMAT,
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start_idx, new_num_regions);
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uint end_idx = (start_idx + (uint)new_num_regions);
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assert(end_idx <= _max_regions, "Must be within max.");
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for (uint i = 0; i < G1RemSet::num_par_rem_sets(); i++) {
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for (uint j = start_idx; j < end_idx; j++) {
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set(i, j, InvalidCard);
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}
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}
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}
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#ifndef PRODUCT
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void G1FromCardCache::print(outputStream* out) {
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for (uint i = 0; i < G1RemSet::num_par_rem_sets(); i++) {
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for (uint j = 0; j < _max_regions; j++) {
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out->print_cr("_from_card_cache[%u][%u] = " SIZE_FORMAT ".",
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i, j, at(i, j));
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}
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}
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}
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#endif
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void G1FromCardCache::clear(uint region_idx) {
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uint num_par_remsets = G1RemSet::num_par_rem_sets();
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for (uint i = 0; i < num_par_remsets; i++) {
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set(i, region_idx, InvalidCard);
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}
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}
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