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Update default net to nn-a3d1bfca1672.nnue

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faster permutation of master net weights

Activation data taken from https://drive.google.com/drive/folders/1Ec9YuuRx4N03GPnVPoQOW70eucOKngQe?usp=sharing
Permutation found using 836387a0e5/ftperm.py
See also https://github.com/glinscott/nnue-pytorch/pull/254

The algorithm greedily selects 2- and 3-cycles that can be permuted to increase the number of runs of zeroes. The percent of zero runs from the master net increased from 68.46 to 70.11 from 2-cycles and only increased to 70.32 when considering 3-cycles. Interestingly, allowing both halves of L1 to intermix when creating zero runs can give another 0.5% zero-run density increase with this method.

Measured speedup:

```
CPU: 16 x AMD Ryzen 9 3950X 16-Core Processor
Result of 50 runs

base (./stockfish.master ) = 1561556 +/- 5439
test (./stockfish.patch ) = 1575788 +/- 5427
diff = +14231 +/- 2636

speedup = +0.0091
P(speedup > 0) = 1.0000
```

closes https://github.com/official-stockfish/Stockfish/pull/4640

No functional change
This commit is contained in:
Daniel Monroe 2023-06-23 18:36:27 -04:00 • committed by Joost VandeVondele
parent 0fd186fb28
commit ef94f77f8c
2 changed files with 2 additions and 1 deletions
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1
AUTHORS
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@ -48,6 +48,7 @@ clefrks
Dale Weiler (graphitemaster)
Daniel Axtens (daxtens)
Daniel Dugovic (ddugovic)
Daniel Monroe (Ergodice)
Dan Schmidt (dfannius)
Dariusz Orzechowski (dorzechowski)
David (dav1312)

2
src/evaluate.h
View file

@ -39,7 +39,7 @@ namespace Eval {
// The default net name MUST follow the format nn-[SHA256 first 12 digits].nnue
// for the build process (profile-build and fishtest) to work. Do not change the
// name of the macro, as it is used in the Makefile.
#define EvalFileDefaultName "nn-5af11540bbfe.nnue"
#define EvalFileDefaultName "nn-a3d1bfca1672.nnue"
namespace NNUE {