| /* |
| * Copyright (c) 2001, 2016, 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. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "gc/g1/g1FromCardCache.hpp" |
| #include "gc/g1/g1RemSet.hpp" |
| #include "memory/padded.inline.hpp" |
| #include "utilities/debug.hpp" |
| |
| int** G1FromCardCache::_cache = NULL; |
| uint G1FromCardCache::_max_regions = 0; |
| size_t G1FromCardCache::_static_mem_size = 0; |
| #ifdef ASSERT |
| uint G1FromCardCache::_max_workers = 0; |
| #endif |
| |
| void G1FromCardCache::initialize(uint num_par_rem_sets, uint max_num_regions) { |
| guarantee(max_num_regions > 0, "Heap size must be valid"); |
| guarantee(_cache == NULL, "Should not call this multiple times"); |
| |
| _max_regions = max_num_regions; |
| #ifdef ASSERT |
| _max_workers = num_par_rem_sets; |
| #endif |
| _cache = Padded2DArray<int, mtGC>::create_unfreeable(_max_regions, |
| num_par_rem_sets, |
| &_static_mem_size); |
| |
| invalidate(0, _max_regions); |
| } |
| |
| void G1FromCardCache::invalidate(uint start_idx, size_t new_num_regions) { |
| guarantee((size_t)start_idx + new_num_regions <= max_uintx, |
| "Trying to invalidate beyond maximum region, from %u size " SIZE_FORMAT, |
| start_idx, new_num_regions); |
| uint end_idx = (start_idx + (uint)new_num_regions); |
| assert(end_idx <= _max_regions, "Must be within max."); |
| |
| for (uint i = 0; i < G1RemSet::num_par_rem_sets(); i++) { |
| for (uint j = start_idx; j < end_idx; j++) { |
| set(i, j, InvalidCard); |
| } |
| } |
| } |
| |
| #ifndef PRODUCT |
| void G1FromCardCache::print(outputStream* out) { |
| for (uint i = 0; i < G1RemSet::num_par_rem_sets(); i++) { |
| for (uint j = 0; j < _max_regions; j++) { |
| out->print_cr("_from_card_cache[%u][%u] = %d.", |
| i, j, at(i, j)); |
| } |
| } |
| } |
| #endif |
| |
| void G1FromCardCache::clear(uint region_idx) { |
| uint num_par_remsets = G1RemSet::num_par_rem_sets(); |
| for (uint i = 0; i < num_par_remsets; i++) { |
| set(i, region_idx, InvalidCard); |
| } |
| } |