Search found 20 matches

by jjoshua2
Thu May 02, 2019 12:48 pm
Forum: Computer Chess Club: General Topics
Topic: Dual RTX 2060 for Leela
Replies: 66
Views: 11231

Re: Dual RTX 2060 for Leela

Lc0 parameters: NNCachesize=10000000 SmartPruningFactor=0.0 Backend=cudnn-fp16, for DUAL GPU=Multiplexing Other parameters are Default Maybe you forgot to mention threads since default of 2 will be non optimal. Have you tried threads=3 with round-robin yet? TCEC uses this for a reason because it's ...
by jjoshua2
Mon Mar 04, 2019 3:10 am
Forum: Computer Chess Club: General Topics
Topic: 2950x SMT ON and SMT OFF
Replies: 13
Views: 1896

Re: 2950x SMT ON and SMT OFF

if threadcount and NPS are the same NPS only hold true. If you are using the same number of threads or cores. ... This is why if you look at both screen shots. And look at the total nodes searched the reach depth 36 ply. The 32 thread Stockfish had to search more then 1.1 billion more nodes. To rea...
by jjoshua2
Thu Feb 28, 2019 1:36 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: SPCC: Testrun of Lc0 Net 32930 finished
Replies: 8
Views: 1309

Re: SPCC: Testrun of Lc0 Net 32930 finished

Testrun of Lc0 0.20.2 N:32930 finished. I was wondering if you used the defaults or the Superfinal settings that improved tactical performance? Cpuct=3.4 and cpuctbase=10000 (and enough nncache for longer thinks). (I've tested Leelafish some and it seems that it's actually worse with these tactical...
by jjoshua2
Thu Feb 28, 2019 1:29 am
Forum: Computer Chess Club: General Topics
Topic: 2950x SMT ON and SMT OFF
Replies: 13
Views: 1896

Re: 2950x SMT ON and SMT OFF

I think NPS and thread count are what matters, not whether SMT is on or off. A modern computer could have a similar threadcount and NPS to a 5 year old computer that used actual cores instead of SMT, and it shouldn't really matter if threadcount and NPS are the same. Just cheaper hardware to get tha...
by jjoshua2
Sat Feb 23, 2019 5:57 pm
Forum: Computer Chess Club: General Topics
Topic: Trying out the Leela Hybrid engine (NN with AB)
Replies: 150
Views: 34984

Re: Trying out the Leela Hybrid engine (NN with AB)

Eduard wrote:
Fri Feb 22, 2019 10:36 pm
I see that it is also possible to combine two neural networks. One as the main engine and one as the AuxEngine. Interesting.
I tried that and it seemed to work for me.
by jjoshua2
Fri Feb 22, 2019 12:12 am
Forum: Computer Chess Club: General Topics
Topic: Trying out the Leela Hybrid engine (NN with AB)
Replies: 150
Views: 34984

Re: Trying out the Leela Hybrid engine (NN with AB)

using 3 threads for SFdev as aux engine, 1024MB hash, everything else default. Insomuch as the defaults are balanced for 1 thread, using more threads will reach the same depth faster, and thus have empty queues too often. So with more threads it should be necessary either to increase the default de...
by jjoshua2
Tue Feb 19, 2019 3:11 am
Forum: Computer Chess Club: General Topics
Topic: Threadripper optimization for chess engines Uma vs Numa
Replies: 2
Views: 574

Re: Threadripper optimization for chess engines Uma vs Numa

Uma has greater memory bandwidth (since it can also use memory channels that are further away) but higher memory latency. So for hash tables numa is better.
by jjoshua2
Tue Feb 12, 2019 3:52 am
Forum: Computer Chess Club: General Topics
Topic: CUDA benchmark and Elo of Leela
Replies: 3
Views: 967

Re: CUDA benchmark and Elo of Leela

Those are the best available, but almost useless now since they were before we had the a0 puct scaling formula. So it didn't scale well at all without that. Also T30 and T40 seem to scale differently than the T10 series in shorter benchmark results. See http://talkchess.com/forum3/viewtopic.php?f=2&...
by jjoshua2
Tue Feb 12, 2019 3:47 am
Forum: Computer Chess Club: General Topics
Topic: Scorpio+Lc0-32742 vs Stockfish 9
Replies: 13
Views: 2791

Re: Scorpio+Lc0-32742 vs Stockfish 9

Ankan's benchmark, is a bit out of date, but still quite relevant I think. Latest lc0 should be a bit faster, and some defaults have changed. I'm excited to follow your progress. with cudnn 7.3 and 411.63 driver available at nvidia.com minibatch-size=512, network id: 11250, go nodes 1000000 v0.17, d...
by jjoshua2
Tue Feb 12, 2019 3:44 am
Forum: Computer Chess Club: General Topics
Topic: Lc0 has forced a computer system upgrade.
Replies: 16
Views: 2530

Re: Lc0 has forced a computer system upgrade.

Two 2080s is certainly much stronger than one 2080 ti. You can see 2 x 2070 sometimes on TCEC bonus and it is faster than a 2080 ti for Leela, (but probably not anything else as it doesn't even support NVLINK/SLI). I do recommend the 2950x and x399 mobo, but if you can wait until October the 30xx CP...