DCS and HTT, affinity performance experiment

[AJaromir]

Good day. I have Core i7-6700K 4.2GHz 4 cores 8 threads; 16GB DDR4 XMP 2.0 profile #2 2133MHz RAM; MSI GTX 1080 gaming X 8G and 512 NVMe SSD on motherboard MSI Z170A Gaming M5, OS W10 home. I wondered why a lot of my friends have better results on I5. The main difference between I5 and I7 is HTT. (Hyper Threading Technology - one physical core is splitted to two virtual cores)

 

Today I tried do experiment with HTT and core affinity in DCS:1.5.x

With HTT on I got max 30% CPU load

With HTT off I got UP to 70% CPU load

I also tried change the CPU affinity.

I've found the more than 3 cores have no impact on performance.

 

This "experiment" evaluates that DCS can not use more than 3 cores.

 

Can someone try it, please and post here his results? THX.

Edited September 25, 2016 by AJaromir

[GGTharos]

This is not news :)

 

DCS runs on 2 threads: One for the main game, one for the sound engine. If they've added a 3rd, I have not heard about it.

[will-]

Forgive my ignorance. But what settings should I set my i7 to?

[GGTharos]

It shouldn't matter.

[AJaromir]

In UEFI or BIOS try to turn off HTT and check if the game works better. THX.

BTW. it's sad the game runs so bad on such powerfull HW.

Here is my 3Dmark benchmark result:

http://www.3dmark.com/3dm/15063633

[Goldsmack]

This horse has been beaten to death a thousand times over :lol:. I'ts actually one of the reason I chose an I5 4690k for my DCS pc...and got extra RAM when it was cheap. But I still get days where its unplayable and that can be so frustrating I stop playing for weeks sometimes untill a patch/driver fixes it (if its on there end) Like right now I only play 2.0 because 1.5 is unplayable unless I use a view distance fix and a few other things (which is banned in MP AHH!!) and I just dont care enough anymore to fiddle with the settings. Maybe when the new tech is done and things are mirged I'll go back and do a performance optimization

Edited September 25, 2016 by Goldsmack

[will-]

Just willing to try anything to fix this f-15 tws frame rate drop after play for only 15-30mins.

[Goldsmack]

Just willing to try anything to fix this f-15 tws frame rate drop after play for only 15-30mins.

 

If you got the time I sugest deleting your options.lua in

 

C:\Users\USERNAME\Saved Games\DCS\Config

 

And then fire up dcs and start turning on/up individual settings and then testing in game to see the FPS. There are also view distance and shadow mods I have had a little luck with personaly.

[SkateZilla]

Good day. I have Core i7-6700K 4.2GHz 4 cores 8 threads; 16GB DDR4 XMP 2.0 profile #2 2133MHz RAM; MSI GTX 1080 gaming X 8G and 512 NVMe SSD on motherboard MSI Z170A Gaming M5, OS W10 home. I wondered why a lot of my friends have better results on I5. The main difference between I5 and I7 is HTT. (Hyper Threading Technology - one physical core is splitted to two virtual cores)

 

Today I tried do experiment with HTT and core affinity in DCS:1.5.x

With HTT on I got max 30% CPU load

With HTT off I got UP to 70% CPU load

I also tried change the CPU affinity.

I've found the more than 3 cores have no impact on performance.

 

This "experiment" evaluates that DCS can not use more than 3 cores.

 

Can someone try it, please and post here his results? THX.

 

CPU Usage% is Dynamic to how many threads your O/S Detects.

 

So,

4 Threads, w/ 1 at 100% Usage =25% Total CPU Usage

4 Threads, w/ 2 at 100% Usage =50% Total CPU Usage

8 Threads, w/ 2 at 100% Usage =25%

16 Threads, w/ 2 at 100% usage =13%

 

https://forums.eagle.ru/showthread.php?t=118535&highlight=Affinity

Edited September 26, 2016 by SkateZilla

[AtaliaA1]

In UEFI or BIOS try to turn off HTT and check if the game works better. THX.

BTW. it's sad the game runs so bad on such powerfull HW.

Here is my 3Dmark benchmark result:

http://www.3dmark.com/3dm/15063633

 

 

You are attempting to discuss issues we have already evaluated long ago.

 

Take a look at our search function to find answers from the issue you are

looking into.

 

3DMark has nothing to do with a DX9 program. The results you are viewing there

are synthetic numbers with little meaning in the real world. I am aware gamers

believe in the 3dmark program as the "Holy Grail" of gaming. But the numbers

are just numbers in the real world. DX9 is a Microsoft program that isn't updated

any longer. So it isn't represented well in 3dmarks number crunching scheme.

 

Hyper Threading has been done so much few here want to even talk about it. but you can as

I say take a look at the old logs by way of the search function. You will learn a lot and not bring up things we

as mentioned above have "Beaten to Death" long ago.

 

Your enthusiasm is much like the best of the best individuals here. I am looking forward to your

future posts as you learn more about our software. I know your level of intelligence and enthusiasm will bring many great post and conversations.

Edited September 26, 2016 by AtaliaA1

[Goldsmack]

3DMark has nothing to do with a DX9 program. The results you are viewing there

 

Has the change to DX11 not happened yet? or is it only 2.0? I am confused again :huh:

[AtaliaA1]

Has the change to DX11 not happened yet? or is it only 2.0? I am confused again :huh:

 

It in essence has happened. It is a "Sandbox" implementation, one that allows us some use

of the DX11 technology.

 

To take advantage of the DX11 Tech. in its entirety the software would have to be completely

reprogrammed. This being a huge undertaking and expensive endeavor, we can only hope

all goes well with DCS and its affiliates to (in the future) give us this awesome simulator in its

full glory. Technically speaking of course.

 

I will buy a lottery ticket in hopes of giving them the funds to accomplish this great metamorphosis.

[AJaromir]

Take a look at our search function to find answers from the issue you are

looking into.

The search function never found what I was searching. I always input keywords and the solution is: Nothing here, but chicken.

 

3DMark has nothing to do with a DX9 program. The results you are viewing there.....

I used it only for now to check my HW balance. Otherwise don't use it.

 

say take a look at the old logs by way of the search function...

Search never worked for me. Always found nothing after entering the keywords

 

Your enthusiasm is much like the best of the best individuals here. I am looking forward to your

future posts as you learn more about our software. I know your level of intelligence and enthusiasm will bring many great post and conversations.

 

I don't understand. How do you mean this?

Edited September 27, 2016 by AJaromir