Koivisto 7.0

[Rebel]

What is old ?

From the command line, thus tt=16Mb

Code: Select all

Koivisto 7.0 AVX2
go depth 30
NPS = 1.032.550

Code: Select all

Koivisto 6.23
go depth 30
AVX2     = 1.514.873
SSE 4.2  = 1.636.404
SSE      = 1.533.761
Popcount = 1.607.047

The loss of speed is expected due to the larger network. I am not sure what exactly is going on and your results seem to match (the elo difference to 6.23 and 6.0). I was just curious why we are struggling to beat SF 10 whereas it beats SF 11 on my machine.

Just 200 games statistically is not very sound. I started a match, Koivisto 7 vs SF10, normal openings, 1000 games.

http://rebel13.nl/a/grl.htm

Fyi we added the option to stack arguments after the executable name (probably irrelevant for most)

Code: Select all

Koivisto.exe "go depth 10" "print" "eval"

will do the 3 commands after each other

[Luecx]

What is old ?

From the command line, thus tt=16Mb

Code: Select all

Koivisto 7.0 AVX2
go depth 30
NPS = 1.032.550

Code: Select all

Koivisto 6.23
go depth 30
AVX2     = 1.514.873
SSE 4.2  = 1.636.404
SSE      = 1.533.761
Popcount = 1.607.047

The loss of speed is expected due to the larger network. I am not sure what exactly is going on and your results seem to match (the elo difference to 6.23 and 6.0). I was just curious why we are struggling to beat SF 10 whereas it beats SF 11 on my machine.

Just 200 games statistically is not very sound. I started a match, Koivisto 7 vs SF10, normal openings, 1000 games.

http://rebel13.nl/a/grl.htm

Fyi we added the option to stack arguments after the executable name (probably irrelevant for most)

Code: Select all

Koivisto.exe "go depth 10" "print" "eval"

will do the 3 commands after each other

interesting result! thanks a lot for testing

[Rebel]

What is old ?

You said this in July this year:

I would love to see a push for all rating lists to make use of AVX2 processors. Most NNUE engines are gimped without those.

I fear another PC in the living room will be at the cost my marriage.

My charm won

BTW, hardly any speed difference between ethereal 13.25 NNUE AVX2 and the popcount version.

[Madeleine Birchfield]

What is old ?

You said this in July this year:

I would love to see a push for all rating lists to make use of AVX2 processors. Most NNUE engines are gimped without those.

I fear another PC in the living room will be at the cost my marriage.

My charm won

BTW, hardly any speed difference between ethereal 13.25 NNUE AVX2 and the popcount version.

Maybe not on your hardware because you don't have avx2 instructions on your hardware, but other people with avx2 instructions on their hardware can detect and have detected a speed difference.

[Rebel]

What is old ?

You said this in July this year:

I would love to see a push for all rating lists to make use of AVX2 processors. Most NNUE engines are gimped without those.

I fear another PC in the living room will be at the cost my marriage.

My charm won

BTW, hardly any speed difference between ethereal 13.25 NNUE AVX2 and the popcount version.

Maybe not on your hardware because you don't have avx2 instructions on your hardware, but other people with avx2 instructions on their hardware can detect and have detected a speed difference.

You are wrong, an AVX2 compile will crash if the processor doesn't support AVX2.

[Jouni]

In CCC there is already 7.1 playing.

[CMCanavessi]

What is old ?

You said this in July this year:

I would love to see a push for all rating lists to make use of AVX2 processors. Most NNUE engines are gimped without those.

I fear another PC in the living room will be at the cost my marriage.

My charm won

BTW, hardly any speed difference between ethereal 13.25 NNUE AVX2 and the popcount version.

Maybe not on your hardware because you don't have avx2 instructions on your hardware, but other people with avx2 instructions on their hardware can detect and have detected a speed difference.

You are wrong, an AVX2 compile will crash if the processor doesn't support AVX2.

Are you using an AMD processor? The problem is that while older Ryzen processors "support" AVX2, it's not a hardware instruction. It's done in software by dividing it in 2 and using normal AVX to process it, so, while it's supported, it works exactly the same (speed wise) as normal AVX so there's no boost in speed. In Intel processors (and Ryzen 3000 and newer), avx2 is real and you see almost a 100% speed increase.

[Krzysztof Grzelak]

Are you using an AMD processor? The problem is that while older Ryzen processors "support" AVX2, it's not a hardware instruction. It's done in software by dividing it in 2 and using normal AVX to process it, so, while it's supported, it works exactly the same (speed wise) as normal AVX so there's no boost in speed. In Intel processors (and Ryzen 3000 and newer), avx2 is real and you see almost a 100% speed increase.

Sorry to ask, and how do you know about this? I have an AMD processor - how to check if it is fully used AVX2.

[Rebel]

What is old ?

You said this in July this year:

I would love to see a push for all rating lists to make use of AVX2 processors. Most NNUE engines are gimped without those.

I fear another PC in the living room will be at the cost my marriage.

My charm won

BTW, hardly any speed difference between ethereal 13.25 NNUE AVX2 and the popcount version.

Maybe not on your hardware because you don't have avx2 instructions on your hardware, but other people with avx2 instructions on their hardware can detect and have detected a speed difference.

You are wrong, an AVX2 compile will crash if the processor doesn't support AVX2.

Are you using an AMD processor? The problem is that while older Ryzen processors "support" AVX2, it's not a hardware instruction. It's done in software by dividing it in 2 and using normal AVX to process it, so, while it's supported, it works exactly the same (speed wise) as normal AVX so there's no boost in speed. In Intel processors (and Ryzen 3000 and newer), avx2 is real and you see almost a 100% speed increase.

Intel.

[CMCanavessi]

Are you using an AMD processor? The problem is that while older Ryzen processors "support" AVX2, it's not a hardware instruction. It's done in software by dividing it in 2 and using normal AVX to process it, so, while it's supported, it works exactly the same (speed wise) as normal AVX so there's no boost in speed. In Intel processors (and Ryzen 3000 and newer), avx2 is real and you see almost a 100% speed increase.

Sorry to ask, and how do you know about this? I have an AMD processor - how to check if it is fully used AVX2.

Easy, if you have a Zen 2 processor or newer, you're good to go. Zen 2 processors are Ryzen 3xxx and newer. If you have a Zen 1 or Zen + like I do (Ryzen 1xxx or 2xxx) you're busted