Dev Builds » 20171226-0940

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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.


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Commit ID 1c50d8cbf554733c0db6ab423b413d75cc0c1928
Author Joost VandeVondele
Date 2017-12-26 09:40:42 UTC
Upon changing the number of threads, make sure all threads are bound The heuristic to avoid thread binding if less than 8 threads are requested resulted in the first 7 threads not being bound. The branch was verified to yield a roughly 13% speedup by @CoffeeOne on the appropriate hardware and OS, and an earlier version of this patch tested well on his machine: ELO: 9.24 +-4.6 (95%) LOS: 100.0% Total: 5000 W: 634 L: 501 D: 3865 To make sure all threads (including mainThread) are bound as soon as the total number exceeds 7, recreate all threads on a change of thread number. To do this, unify Threads::init, Threads::exit and Threads::set are unified in a single Threads::set function that goes through the needed steps. The code includes several suggestions from @joergoster. Fixes issue #1312 No functional change
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