Dev Builds » 20150223-1848

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 14. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host Duration Avg Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN

Commit

Commit ID d3d26a94b3e501459a610b8d730394125c9afd45
Author Marco Costalba
Date 2015-02-23 18:48:46 UTC
Improve spinlock implementation Calling lock.test_and_set() in a tight loop creates expensive memory synchronizations among processors and penalize other running threads. So syncronize only only once at the beginning with fetch_sub() and then loop on a simple load() that puts much less pressure on the system. Reported about 2-3% speed up on various systems. Patch by Ronald de Man. No functional change.
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