mirror of
https://github.com/sockspls/badfish
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b4a04d8038
This reduces contention and reduce history trashing effect especially at high search depths. No functional change for single CPU case. After 999 games at 1+0 on Dual Core Intel we have Mod vs Orig +233 =526 -240 -2 ELO We need to test at longer time controls and possibly with a QUAD where we could foreseen an improvment. Signed-off-by: Marco Costalba <mcostalba@gmail.com>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
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Copyright (C) 2008-2009 Marco Costalba
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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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#if !defined(THREAD_H_INCLUDED)
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#define THREAD_H_INCLUDED
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////
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//// Includes
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////
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#include "history.h"
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#include "lock.h"
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#include "movepick.h"
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#include "position.h"
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#include "search.h"
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////
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//// Constants and variables
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////
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const int THREAD_MAX = 8;
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////
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//// Types
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////
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struct SplitPoint {
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SplitPoint *parent;
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Position pos;
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SearchStack sstack[THREAD_MAX][PLY_MAX];
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SearchStack *parentSstack;
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int ply;
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Depth depth;
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volatile Value alpha, beta, bestValue;
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bool pvNode;
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Bitboard dcCandidates;
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int master, slaves[THREAD_MAX];
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Lock lock;
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MovePicker *mp;
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volatile int moves;
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volatile int cpus;
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bool finished;
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};
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struct Thread {
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SplitPoint *splitPoint;
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int activeSplitPoints;
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uint64_t nodes;
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uint64_t betaCutOffs[2];
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bool failHighPly1;
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volatile bool stop;
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volatile bool running;
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volatile bool idle;
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volatile bool workIsWaiting;
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volatile bool printCurrentLine;
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History H;
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unsigned char pad[64]; // set some distance among local data for each thread
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};
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#endif // !defined(THREAD_H_INCLUDED)
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