avx512 compile

[Ipmanchess]

Would like to see Koivisto also as a avx512 compile in near future!

Ofcourse if some checks are needed i can always test it out on my i9 7980XE where i running avx512 engines..

Kind regards,
Ipman.

[altarchess]

Finn has been planning to do avx512 for tcec, so this is def on the to-do list :)

[Luecx]

Working on it now. Let's see if I can squeeze out a few nps :)

[Ipmanchess]

Thanks!

Koivisto needs to try enter my lists ;)
http://ipmanchess.yolasite.com/i9-7980xe.php

[Ipmanchess]

My Tournament 2021

1 Koivisto 6.0 x64 avx2 +271 +756/=141/-103 82.65% 826.5/1000
2 Koivisto 5.0 x64 avx2 -271 +103/=141/-756 17.35% 173.5/1000

TC: 1sec+0sec. Just to check your engine doesn't get Time Forfeits ,and = 0 zero ,Perfect!!

Engine Depth Time Games Moves Average Forfeit Book Depth MIDG EARLY ENDG LATE
Koivisto 6.0 x64 avx 9.51 0:12:11 1000 58371 0.01 0 2977 2.98 10.76 | 10.84 | 8.34 | 7.28
Koivisto 5.0 x64 avx 8.71 0:11:14 1000 58194 0.01 0 2981 2.98 10.15 | 10.48 | 7.43 | 5.88

[Luecx]

So I got something to work. Sadly I am unable to validate this for the AVX512 part neither am I sure if the SSE code is as fast as it should be. @Ipmanchess could you try to compile yourself?

git clone https://github.com/Luecx/Koivisto.git
git checkout avx512support
cd src_files/
make release

This should produce 3 binaries inside the /bin folder. Running them inside the command line using ./Koivisto_6.0.... bench should run a search on 50 positions which will take around 4. Can you validate that the bench of all the 3 executables match?

Greetings
Finn

[Luecx]

If not possible, I can also send you 3 binaries if you tell me the OS you work on.

[Luecx]

Okay So I would like you to download the sources from here:

https://github.com/Luecx/Koivisto/tree/avx512support

Click on the download button as zip.

Unpack it somewhere.

Next, get the network file from here:

https://github.com/Luecx/KoivistoNetworks/tree/240b52215d703ebf16de5872927b5c86c5bb68e4

---

1. paste the network file anywhere inside the unpacked koivisto folder
2. go into src_files/
3. make release EVALFILE=pathToWhereYouPlacedTheNetwork
4. go into the bin/ folder, run the 3 exes from command lines using ./Koivisto.... bench This will produce a bench value which should be the same for all of them and a different nps value which should be largest for AVX512 and lowest for SSE. I would like you to paste the bench results here

[Ipmanchess]

Thanks for fixing avx512 ,it's compiling and working great now with a very nice speed up!!
I have given bench screens in discord ,don't know how to put here..

Kind regards,
Ipman.