128-core AMD server

Discussion of chess software programming and technical issues.

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jwes
Posts: 778
Joined: Sat Jul 01, 2006 7:11 am

Re: 128-core AMD server

Post by jwes »

jhellis3 wrote:
What about the argument that its time to depth that matters?
TTD is a useless measurement for LazySMP.
So you're saying that LazySMP finds better moves at equal depths rather than finding the same move faster.
jdart
Posts: 4367
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: 128-core AMD server

Post by jdart »

Arasan scales quite badly on 32 cores, at present. It is on my to-do list to look at soon.

But other engines do better: Stockfish for example.

Crafty also uses multiple cores efficiently and can hits amazingly high NPS, but I haven't tried it on this 32 core box.

--Jon
Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: 128-core AMD server

Post by Dann Corbit »

jdart wrote:Arasan scales quite badly on 32 cores, at present. It is on my to-do list to look at soon.

But other engines do better: Stockfish for example.

Crafty also uses multiple cores efficiently and can hits amazingly high NPS, but I haven't tried it on this 32 core box.

--Jon
Texel scales brilliantly
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.
petero2
Posts: 690
Joined: Mon Apr 19, 2010 7:07 pm
Location: Sweden
Full name: Peter Osterlund

Re: 128-core AMD server

Post by petero2 »

Dann Corbit wrote:
jdart wrote:Arasan scales quite badly on 32 cores, at present. It is on my to-do list to look at soon.

But other engines do better: Stockfish for example.

Crafty also uses multiple cores efficiently and can hits amazingly high NPS, but I haven't tried it on this 32 core box.

--Jon
Texel scales brilliantly
Texel is also one of a few engines that can actually use all 128 cores on that computer, assuming you compile it with cluster support.