Chess Forum

Sedat Canbaz wrote: ↑Sat Jul 08, 2023 4:03 pm

Adrian Oliva wrote: ↑Sat Jul 08, 2023 1:28 pm

Skynet wrote: ↑Fri Jul 07, 2023 2:34 pm

Adrian Oliva wrote: ↑Fri Jul 07, 2023 11:21 am
1 SF PB 16 AVX +2 +10/=326/-8 50.29% 173.0/344
2 SF PB 16 AVX2 -2 +8/=326/-10 49.71% 171.0/344

Hi Adrian, many thanks! That's what i wanted to confirm, of course the number of games is not that big but it looks like AVX is better than AVX2, i also had better results in favor of AVX on my AMD Ryzen 7 1800X (with short time control).

Hi Alex! I am glad that you can clarify your doubts. I was always recommended to use AVX2 versions for my PC, but from your experience, AVX seems to work better. Have a very good weekend everyone! Greetings

Hello Adrian,

A useful testing, I like it!

Meanwhile, can you inform me please:
Large Pages are enabled on your machine ?
And Hyper-Threading (SMT) is enabled too ?

Why I ask these questions,
Depending on various hardwares, configurations etc
The used conditions may down/damage our testings..

E.g in the past..I noticed that (in one of my older machines)
When Hyper-Threading was as ON + Ponder ON suffered...
I mean some programs produced unexpected, strange results!
For this reason, if running long-matches+Ponder ON on same machine
I suggest to be disabled HT...plus LP to be disabled as well

Anyhow, after checking your test games,
We see that the results are almost identical,
I mean that we can not say AVX2 is weaker..
Btw, 344 games data is good, but not enough
To say exactly that AVX is much stronger...

Meanwhile, for anyone missed, interested...
I have many compile/binary testings as AVX2, BMI2 etc :
https://sites.google.com/site/computers ... g-strength

One thing more, during my beta SF-PB benchmark testings:
https://sites.google.com/site/computers ... benchmarks
I found that AVX2 is best/solved faster on my latest machine (2x Epyc 7B12)

On other hand, actually the shocking news was that,
Stockfish 10 x64 or even 32-bit( for older processors), performed even better on some hardwares
https://sites.google.com/site/computers ... benchmarks

As conclusion,
Any engine compile's speed depends on author, hardware, testings etc.!

Just my 2 cents over this issue )

Greetings

cubail wrote: ↑Sat Jul 08, 2023 3:09 pm SF PB 16 AVX where engıne lınk
thanks

Adrian Oliva wrote: ↑Sat Jul 08, 2023 7:15 pm

cubail wrote: ↑Sat Jul 08, 2023 3:09 pm SF PB 16 AVX where engıne lınk
thanks

Hello Cubail! You can download it right here on the forum it's a Skynet compilation!
viewtopic.php?t=104
Greetings

Adrian Oliva wrote: ↑Sat Jul 08, 2023 1:28 pm

Skynet wrote: ↑Fri Jul 07, 2023 2:34 pm

Adrian Oliva wrote: ↑Fri Jul 07, 2023 11:21 am
1 SF PB 16 AVX +2 +10/=326/-8 50.29% 173.0/344
2 SF PB 16 AVX2 -2 +8/=326/-10 49.71% 171.0/344

Hi Adrian, many thanks! That's what i wanted to confirm, of course the number of games is not that big but it looks like AVX is better than AVX2, i also had better results in favor of AVX on my AMD Ryzen 7 1800X (with short time control).

Hi Alex! I am glad that you can clarify your doubts. I was always recommended to use AVX2 versions for my PC, but from your experience, AVX seems to work better. Have a very good weekend everyone! Greetings

janus wrote: ↑Sat Jul 08, 2023 4:13 pm

cubail wrote: ↑Sat Jul 08, 2023 3:09 pm SF PB 16 AVX where engıne lınk
thanks

Hello cubail - I think it might be a private engine. I dont see a link to it - maybe Skynet could upload.

Skynet wrote: ↑Sat Jul 08, 2023 9:29 pm

janus wrote: ↑Sat Jul 08, 2023 4:13 pm

cubail wrote: ↑Sat Jul 08, 2023 3:09 pm SF PB 16 AVX where engıne lınk
thanks

Hello cubail - I think it might be a private engine. I dont see a link to it - maybe Skynet could upload.

Yep, it is private, if you want it, it gonna cost you 50 $, 100 $ with a year subscriptions.
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Let me know when you'll be ready for my revenge (book duel ), Butt Kicker is almost ready.
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