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» Latest abrok Development Version March 26th (SF The gift that keeps on giving
!! latest version !! Big increase in ELO EmptyYesterday at 6:19 pm by LondonFrau

» Latest abrok Development Version March 22nd (SF The gift that keeps on giving
!! latest version !! Big increase in ELO EmptySun Mar 24, 2024 7:05 pm by LondonFrau

» 1337 pro ctg update
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» Latest abrok Development Version March 20th (SF The gift that keeps on giving
!! latest version !! Big increase in ELO EmptyWed Mar 20, 2024 5:45 pm by LondonFrau

» 26 plus elo increase ..Latest SF from Abrok March 14th The gift that keeps on giving
!! latest version !! Big increase in ELO EmptySun Mar 17, 2024 1:41 pm by LondonFrau

» Latest SF from Abrok March 7th
!! latest version !! Big increase in ELO EmptySun Mar 10, 2024 5:52 pm by LondonFrau

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!! latest version !! Big increase in ELO EmptySun Mar 03, 2024 2:33 am by LondonFrau

»  Update default main net to nn-b1a57edbea57.nnue Febuary 17th (SF The gift that keeps on giving
!! latest version !! Big increase in ELO EmptyTue Feb 20, 2024 2:41 am by LondonFrau

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 !! latest version !! Big increase in ELO

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LondonFrau
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!! latest version !! Big increase in ELO Empty
PostSubject: !! latest version !! Big increase in ELO   !! latest version !! Big increase in ELO EmptyTue Feb 17, 2015 1:12 pm

Windows x64 for Haswell CPUs
Windows x64 for modern computers
Windows x64
Windows 32
Linux x64 for Haswell CPUs
Linux x64 for modern computers
Linux x64
Author: Joona Kiiski
Date: Mon Feb 16 20:36:13 2015 +0000
Timestamp: 1424118973

Improve smp performance for high number of threads

Balance threads between split points.

There are huge differences between different machines and autopurging makes it very difficult to measure the improvement in fishtest, but the following was recorded for 16 threads at 15+0.05:

For Bravone (1000 games): 0 ELO
For Glinscott (1000 games): +20 ELO
For bKingUs (1000 games): +50 ELO
For fastGM (1500 games): +50 ELO

The change was regression for no one, and a big improvement for some, so it should be fine to commit it.
Also for 8 threads at 15+0.05 we measured a statistically significant improvement:
ELO: 6.19 +-3.9 (95%) LOS: 99.9%
Total: 10325 W: 1824 L: 1640 D: 6861

Finally it was verified that there was no (significant) regression for

4 threads:
ELO: 0.09 +-2.8 (95%) LOS: 52.4%
Total: 19908 W: 3422 L: 3417 D: 13069

2 threads:
ELO: 0.38 +-3.0 (95%) LOS: 60.0%
Total: 19044 W: 3480 L: 3459 D: 12105

1 thread:
ELO: -1.27 +-2.1 (95%) LOS: 12.3%
Total: 40000 W: 7829 L: 7975 D: 24196

Resolves #258
http://abrok.eu/stockfish/

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