Welcome to the chess forum of massimilianogoi.com
https://chess.massimilianogoi.com/forum/
GreetingsHi Adrian, there is no such a big difference but i would say AVX.Adrian Oliva wrote: ↑Wed Jul 12, 2023 1:45 am Hi Alex! thanks for the update. Which version do you think is better than trying AVX or AVX2?
Code: Select all
CPUs with AVX
Edit
Intel
Sandy Bridge processors, Q1 2011[9]
Sandy Bridge E processors, Q4 2011[10]
Ivy Bridge processors, Q1 2012
Ivy Bridge E processors, Q3 2013
Haswell processors, Q2 2013
Haswell E processors, Q3 2014
Broadwell processors, Q4 2014
Skylake processors, Q3 2015
Broadwell E processors, Q2 2016
Kaby Lake processors, Q3 2016 (ULV mobile)/Q1 2017 (desktop/mobile)
Skylake-X processors, Q2 2017
Coffee Lake processors, Q4 2017
Cannon Lake processors, Q2 2018
Whiskey Lake processors, Q3 2018
Cascade Lake processors, Q4 2018
Ice Lake processors, Q3 2019
Comet Lake processors (only Core and Xeon branded), Q3 2019
Tiger Lake (Core, Pentium and Celeron branded[11]) processors, Q3 2020
Rocket Lake processors, Q1 2021
Alder Lake (Xeon, Core, Pentium and Celeron branded) processors, Q4 2021. Supported both in Golden Cove P-cores and Gracemont E-cores.
Raptor Lake processors, Q4 2022
Sapphire Rapids processors, Q1 2023
Meteor Lake processors
Arrow Lake processors
Lunar Lake processors
Not all CPUs from the listed families support AVX. Generally, CPUs with the commercial denomination Core i3/i5/i7/i9 support them, whereas Pentium and Celeron CPUs before Tiger Lake[12] do not.
AMD:
Jaguar-based processors and newer
Puma-based processors and newer
"Heavy Equipment" processors
Bulldozer-based processors, Q4 2011[13]
Piledriver-based processors, Q4 2012[14]
Steamroller-based processors, Q1 2014
Excavator-based processors and newer, 2015
Zen-based processors, Q1 2017
Zen+-based processors, Q2 2018
Zen 2-based processors, Q3 2019
Zen 3 processors, Q4 2020
Zen 4 processors, Q4 2022
Code: Select all
CPUs with AVX2
Edit
Intel
Haswell processors (only Core and Xeon branded), Q2 2013
Haswell E processors, Q3 2014
Broadwell processors, Q4 2014
Broadwell E processors, Q3 2016
Skylake processors, Q3 2015
Kaby Lake processors, Q3 2016 (ULV mobile)/Q1 2017 (desktop/mobile)
Skylake-X processors, Q2 2017
Coffee Lake processors, Q4 2017
Cannon Lake processors, Q2 2018
Cascade Lake processors, Q2 2019
Ice Lake processors, Q3 2019
Comet Lake processors, Q3 2019
Tiger Lake (Core, Pentium and Celeron branded[11]) processors, Q3 2020
Rocket Lake processors, Q1 2021
Alder Lake (Xeon, Core, Pentium and Celeron branded[11]) processors, Q4 2021. Supported both in Golden Cove P-cores and Gracemont E-cores.
Raptor Lake processors, Q4 2022
Sapphire Rapids processors, Q1 2023
Meteor Lake processors
Arrow Lake processors
Lunar Lake processors
AMD
Excavator processor and newer, Q2 2015
Zen processors, Q1 2017
Zen+ processors, Q2 2018
Zen 2 processors, Q3 2019
Zen 3 processors, Q4 2020
Zen 4 processors, Q4 2022
Skynet wrote: ↑Tue Jul 11, 2023 11:49 pm SF-PB-110723_x64 "Simplify PvNode reduction" https://github.com/official-stockfish/S ... b5d6fab80a
Hmm, once again the AVX is faster than AVX2.
Btw, i wanted to compile the latest version "Remove classical evaluation" (120723), but there is a big regression -2 elo, now we need to wait till this 2 elo will be gained, plus extra patches with extra elo.
STC https://tests.stockfishchess.org/tests/ ... a549c52157
LTC https://tests.stockfishchess.org/tests/ ... a549c5215b
VLTC https://tests.stockfishchess.org/tests/ ... a549c52168
Well, on my AMD Ryzen 7 1800X, 8 cores / 16 threads, all kind of architectures supported except the newest avx512, vnni512 and vnni256. And after i did some tests it seems that AVX is better, it doesn't matter what CPU you have, only tests can verify which version is better - normally for my PC AVX2 was always better (and recommended), till the last 2 versions that i compiled.massimilianogoi wrote: ↑Wed Jul 12, 2023 2:11 pm I'm pretty sure you already know this is strictly bound to your personal CPU.
Code: Select all
CPUs with AVX Edit Intel Sandy Bridge processors, Q1 2011[9] Sandy Bridge E processors, Q4 2011[10] Ivy Bridge processors, Q1 2012 Ivy Bridge E processors, Q3 2013 Haswell processors, Q2 2013 Haswell E processors, Q3 2014 Broadwell processors, Q4 2014 Skylake processors, Q3 2015 Broadwell E processors, Q2 2016 Kaby Lake processors, Q3 2016 (ULV mobile)/Q1 2017 (desktop/mobile) Skylake-X processors, Q2 2017 Coffee Lake processors, Q4 2017 Cannon Lake processors, Q2 2018 Whiskey Lake processors, Q3 2018 Cascade Lake processors, Q4 2018 Ice Lake processors, Q3 2019 Comet Lake processors (only Core and Xeon branded), Q3 2019 Tiger Lake (Core, Pentium and Celeron branded[11]) processors, Q3 2020 Rocket Lake processors, Q1 2021 Alder Lake (Xeon, Core, Pentium and Celeron branded) processors, Q4 2021. Supported both in Golden Cove P-cores and Gracemont E-cores. Raptor Lake processors, Q4 2022 Sapphire Rapids processors, Q1 2023 Meteor Lake processors Arrow Lake processors Lunar Lake processors Not all CPUs from the listed families support AVX. Generally, CPUs with the commercial denomination Core i3/i5/i7/i9 support them, whereas Pentium and Celeron CPUs before Tiger Lake[12] do not. AMD: Jaguar-based processors and newer Puma-based processors and newer "Heavy Equipment" processors Bulldozer-based processors, Q4 2011[13] Piledriver-based processors, Q4 2012[14] Steamroller-based processors, Q1 2014 Excavator-based processors and newer, 2015 Zen-based processors, Q1 2017 Zen+-based processors, Q2 2018 Zen 2-based processors, Q3 2019 Zen 3 processors, Q4 2020 Zen 4 processors, Q4 2022[/spoiler]Code: Select all
CPUs with AVX2 Edit Intel Haswell processors (only Core and Xeon branded), Q2 2013 Haswell E processors, Q3 2014 Broadwell processors, Q4 2014 Broadwell E processors, Q3 2016 Skylake processors, Q3 2015 Kaby Lake processors, Q3 2016 (ULV mobile)/Q1 2017 (desktop/mobile) Skylake-X processors, Q2 2017 Coffee Lake processors, Q4 2017 Cannon Lake processors, Q2 2018 Cascade Lake processors, Q2 2019 Ice Lake processors, Q3 2019 Comet Lake processors, Q3 2019 Tiger Lake (Core, Pentium and Celeron branded[11]) processors, Q3 2020 Rocket Lake processors, Q1 2021 Alder Lake (Xeon, Core, Pentium and Celeron branded[11]) processors, Q4 2021. Supported both in Golden Cove P-cores and Gracemont E-cores. Raptor Lake processors, Q4 2022 Sapphire Rapids processors, Q1 2023 Meteor Lake processors Arrow Lake processors Lunar Lake processors AMD Excavator processor and newer, Q2 2015 Zen processors, Q1 2017 Zen+ processors, Q2 2018 Zen 2 processors, Q3 2019 Zen 3 processors, Q4 2020 Zen 4 processors, Q4 2022
Depending on the single CPU architecture, AVX should work better or worster. I guess the newer the CPU, the better the AVX2 instructuons set works.
Skynet wrote: ↑Wed Jul 12, 2023 4:13 pm Well, on my AMD Ryzen 7 1800X, 8 cores / 16 threads, all kind of architectures supported except the newest avx512, vnni512 and vnni256. And after i did some tests it seems that AVX is better, it doesn't matter what CPU you have, only tests can verify which version is better - normally for my PC AVX2 was always better (and recommended), till the last 2 versions that i compiled.