Threadripper 1950x but StockFish 8 with low KN/s?

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Lion
Posts: 521
Joined: Fri Mar 31, 2006 11:26 am
Location: Switzerland

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by Lion » Sun Aug 27, 2017 6:33 pm

Hello

2400 MB

I have 16GB ram

Lion
Posts: 521
Joined: Fri Mar 31, 2006 11:26 am
Location: Switzerland

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by Lion » Sun Aug 27, 2017 6:34 pm

I tried also with Komodo, but it is even worse...

zullil
Posts: 6442
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by zullil » Sun Aug 27, 2017 6:36 pm

zullil wrote:
Lion wrote:Well, thanks....
It's however difficult to enjoy when knowing something is going wrong.
Anyhow, thanks for your support.
Sorry to read about the apparent difficulties. A suggestion, which is meant to be helpful and may already be obvious: Find a simple benchmarking scheme that can be compared to a known reliable standard. Don't worry about special compiles, GUIs, etc.

Get a specific version of Stockfish (or asmFish) that is compatible with your system. Run it from the command line, with nothing else open. Use the built in bench command, with some specific values chosen for hash, threads and depth. Run this several times and get an average speed. And then find someone reliable with the same cpu and have them do the identical process and compare results. Make sure your results are actually abnormal before doing anything else.

Good luck to you. I hope things all get sorted out.
Here's what this looks like on the Linux workstation I'm at now. This box has 2 x Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz (so 16 physical cores in total).

Code: Select all

./asmFishL_2017-08-25_popcnt
asmFishL_2017-08-25_popcnt
bench 1024 16 24
*** bench hash 1024 threads 16 depth 24 realtime 0 ***
info string hash set to 1024 MB no large pages
info string node 0 has threads 0 1 2 3 4 5 6 7
info string node 1 has threads 8 9 10 11 12 13 14 15
1:      nodes: 137725507        26516 knps
2:      nodes: 190074280        28935 knps
3:      nodes: 9423431          47593 knps
4:      nodes: 63270717         32479 knps
5:      nodes: 37856211         30553 knps
6:      nodes: 33375029         29225 knps
7:      nodes: 70984154         30322 knps
8:      nodes: 298737765        30452 knps
9:      nodes: 135304362        29022 knps
10:     nodes: 26636142         33546 knps
11:     nodes: 117175795        28019 knps
12:     nodes: 96707503         27349 knps
13:     nodes: 31867403         31931 knps
14:     nodes: 111737172        28584 knps
15:     nodes: 28873106         33809 knps
16:     nodes: 17233968         34745 knps
17:     nodes: 1869799          41551 knps
18:     nodes: 5648911          51353 knps
19:     nodes: 26779526         54100 knps
20:     nodes: 91532311         48739 knps
21:     nodes: 10465922         58468 knps
22:     nodes: 4946129          71683 knps
23:     nodes: 20398602         67322 knps
24:     nodes: 10306794         43672 knps
25:     nodes: 10481785         53752 knps
26:     nodes: 1879717          42720 knps
27:     nodes: 10454070         43198 knps
28:     nodes: 78074414         38085 knps
29:     nodes: 27335409         36062 knps
30:     nodes: 9209609          47966 knps
31:     nodes: 3123971          57851 knps
32:     nodes: 1773642          53746 knps
33:     nodes: 1629081          56175 knps
34:     nodes: 30507161         54186 knps
35:     nodes: 4427025          49741 knps
36:     nodes: 947868           59241 knps
37:     nodes: 1774252          46690 knps
===========================
Total time (ms) : 55490
Nodes searched  : 1760548543
Nodes/second    : 31727312

corres
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Location: hungary

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by corres » Sun Aug 27, 2017 7:22 pm

A question: What kind of Windows you use?
As I know for an AMD CPU with 16 cores it needs Windows 10 ENTERPRISE 64bits or LTSB 64bits.

zullil
Posts: 6442
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by zullil » Sun Aug 27, 2017 7:27 pm

corres wrote:A question: What kind of Windows you use?
As I know for an AMD CPU with 16 cores it needs Windows 10 ENTERPRISE 64bits or LTSB 64bits.
Windows 10-64 home and not Pro
From earlier post.

Lion
Posts: 521
Joined: Fri Mar 31, 2006 11:26 am
Location: Switzerland

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by Lion » Sun Aug 27, 2017 7:34 pm

Right.

Also what is strange is that cinebench R15 seems to provide correct results with a score of about 3200....

corres
Posts: 3327
Joined: Wed Nov 18, 2015 10:41 am
Location: hungary

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by corres » Sun Aug 27, 2017 9:05 pm

It is true that Windows 10 Enterprise is good.
Maybe Windows 10 Pro is also good.
Manual of your motherboard marks the right Windows version.
It is advisable to keep to the Manual.

Lion
Posts: 521
Joined: Fri Mar 31, 2006 11:26 am
Location: Switzerland

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by Lion » Sun Aug 27, 2017 10:10 pm

Could it be related to the memory access mode?
It is by default on Distributed on my computer....
i tried changing it to local but I cannot have it to local with 16cores/32 Threads but only with 8 cores or less?!

It seemed that at least with 8 cores, the result were promising.

Lion
Posts: 521
Joined: Fri Mar 31, 2006 11:26 am
Location: Switzerland

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by Lion » Wed Aug 30, 2017 6:52 am

Hello all,

I was suggested that maybe the issue is related to the fact that I am not in quad channel memory but in dual channel. (I have 2x8 GB RAM)

Could that be the problem?

rgds

daws
Posts: 916
Joined: Wed Mar 08, 2006 9:03 pm

Re: Threadripper 1950x but StockFish 8 with low KN/s?

Post by daws » Wed Aug 30, 2017 7:19 am

I remember reading that the 1950x has a game mode and a creator mode. To take advantage of all the cores you need to be in creator mode.

I've no idea if this is your problem but perhaps a possibility.

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