.CCC has serious hardware update!
Moderators: hgm, Dann Corbit, Harvey Williamson
Forum rules
This textbox is used to restore diagrams posted with the [d] tag before the upgrade.
This textbox is used to restore diagrams posted with the [d] tag before the upgrade.
Re: CCC has serious hardware update!
Now SF classic with 232 cores has much lower nps than Komodo 128 cores. Something is wrong now .
.Jouni
-
Dann Corbit
- Posts: 11859
- Joined: Wed Mar 08, 2006 7:57 pm
- Location: Redmond, WA USA
- Contact:
Re: CCC has serious hardware update!
maybe Komodo scales better
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
Re: CCC has serious hardware update!
Again you can only split the search so many times effectively. And you CAN NOT measure speed by NPS. To know the real speed difference when using different amounts of threads and cores . YOU MUST USE TIME TO DEPTH.
"The worst thing that can happen to a forum is a running wild attacking moderator(HGM) who is not corrected by the community." - Ed Schröder
But my words like silent raindrops fell. And echoed in the wells of silence.
But my words like silent raindrops fell. And echoed in the wells of silence.
-
Nay Lin Tun
- Posts: 682
- Joined: Mon Jan 16, 2012 5:34 am
Re: CCC has serious hardware update!
It looks like you dont understand actual physical cores vs hyperthreads.( 2x Threads=1 core). 232÷2= 116 cores
Stockfish is not running on 232 cores, they dont have 232 cores. Komodo is running on 128 physical cores.
Re: CCC has serious hardware update!
Correct. But the splitting of the search to 232 threads is real. It acts just like a real core but only running at 1/2 speed.Nay Lin Tun wrote: ↑Sat Jan 02, 2021 4:29 pmIt looks like you dont understand actual physical cores vs hyperthreads.( 2x Threads=1 core). 232÷2= 116 cores
Stockfish is not running on 232 cores, they dont have 232 cores. Komodo is running on 128 physical cores.
Most likely Stockfish is being hurt by splitting the search 232 times. But to know by how much you would need to measure the performance with time to depth.
Last edited by mwyoung on Sat Jan 02, 2021 4:37 pm, edited 1 time in total.
"The worst thing that can happen to a forum is a running wild attacking moderator(HGM) who is not corrected by the community." - Ed Schröder
But my words like silent raindrops fell. And echoed in the wells of silence.
But my words like silent raindrops fell. And echoed in the wells of silence.
Re: CCC has serious hardware update!
Looking at the info, here's what I find:
CPUs: 2 x AMD EPYC 7H12
GPU: 2x A100 (40 GB GPU memory)
Cores: 256 cores (128 physical)
RAM: 512GB DIMM DDR4 2933 MHz (0.3 ns)
SSD: 2x Micron 5210 MTFD (2TB) in RAID1
OS: CentOS 8
CPUs: 2 x AMD EPYC 7H12
GPU: 2x A100 (40 GB GPU memory)
Cores: 256 cores (128 physical)
RAM: 512GB DIMM DDR4 2933 MHz (0.3 ns)
SSD: 2x Micron 5210 MTFD (2TB) in RAID1
OS: CentOS 8
Re: CCC has serious hardware update!
Is it the same as the first message of this thread ?
Re: CCC has serious hardware update!
As I said SF has issues with that hardware https://github.com/official-stockfish/S ... /pull/3288. Maybe it's better to use 128 real cores?
Jouni