mirror of
https://github.com/opelly27/Stockfish.git
synced 2026-05-20 02:47:45 +00:00
Sami Kiminki
485d517c68
Use TT memory functions to allocate memory for the NNUE weights. This should provide a small speed-up on systems where large pages are not automatically used, including Windows and some Linux distributions. Further, since we now have a wrapper for std::aligned_alloc(), we can simplify the TT memory management a bit: - We no longer need to store separate pointers to the hash table and its underlying memory allocation. - We also get to merge the Linux-specific and default implementations of aligned_ttmem_alloc(). Finally, we'll enable the VirtualAlloc code path with large page support also for Win32. STC: https://tests.stockfishchess.org/tests/view/5f66595823a84a47b9036fba LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 14896 W: 1854 L: 1686 D: 11356 Ptnml(0-2): 65, 1224, 4742, 1312, 105 closes https://github.com/official-stockfish/Stockfish/pull/3081 No functional change.
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2020 The Stockfish developers (see AUTHORS file)
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Stockfish is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Stockfish is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// header used in NNUE evaluation function
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#ifndef NNUE_EVALUATE_NNUE_H_INCLUDED
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#define NNUE_EVALUATE_NNUE_H_INCLUDED
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#include "nnue_feature_transformer.h"
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#include <memory>
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namespace Eval::NNUE {
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// Hash value of evaluation function structure
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constexpr std::uint32_t kHashValue =
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FeatureTransformer::GetHashValue() ^ Network::GetHashValue();
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// Deleter for automating release of memory area
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template <typename T>
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struct AlignedDeleter {
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void operator()(T* ptr) const {
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ptr->~T();
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std_aligned_free(ptr);
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}
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};
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template <typename T>
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struct TtmemDeleter {
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void operator()(T* ptr) const {
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ptr->~T();
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aligned_large_pages_free(ptr);
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}
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};
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template <typename T>
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using AlignedPtr = std::unique_ptr<T, AlignedDeleter<T>>;
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template <typename T>
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using LargePagePtr = std::unique_ptr<T, TtmemDeleter<T>>;
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} // namespace Eval::NNUE
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#endif // #ifndef NNUE_EVALUATE_NNUE_H_INCLUDED
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