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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) Dale Weiler (graphitemaster)
Daniel Axtens (daxtens) Daniel Axtens (daxtens)
Daniel Dugovic (ddugovic) Daniel Dugovic (ddugovic)
Daniel Monroe (Ergodice)
Dan Schmidt (dfannius) Dan Schmidt (dfannius)
Dariusz Orzechowski (dorzechowski) Dariusz Orzechowski (dorzechowski)
David (dav1312) 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 // 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 // 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. // name of the macro, as it is used in the Makefile.
#define EvalFileDefaultName "nn-5af11540bbfe.nnue" #define EvalFileDefaultName "nn-a3d1bfca1672.nnue"
namespace NNUE { namespace NNUE {