Severe loading performance issues with 2.9.15

[Nightstorm]

6 hours ago, scommander2 said:

What were the CPU/GPU utilization then?

I have tested with affinity with P-Cores only v.s. affinity with P/E-cores (default by DCS), they were not too much different on my 12 P-Cores and 8 E-cores.  Beside, ME runs with the CPU bound in the most of time (my CPU was about 28%, GPU was around 20% for 4080).

While played around NV driver, and I got my display refresh rate become 30 MHz (not sure) so my FPS was low around 30 (hope it is not a case).

Both GPU and CPU util was low.  So a typical load mission goes like this:

Start DCS

Initially, it doesn't take much longer to load than it has.

Mission > Select mission OR

ME > Select mission

Hangs at Terrain Init for good deal longer than it used to in .14, once it finally loads you can do stuff.

Attempt to SAVE a mission in ME > Hangs for a looong time before it proceeds

Launch a mission from ME or from Mission > Hangs for a looogn time before it proceeds

Once in mission and started > A pattern of pauses, where EVERYTHING pauses for a beat every few seconds.  CPU/GPU util normal.

That goes on for around a minute or two and then it stops, and the mission is running normally after.

If I were to guess, these issues are more disk access related than they are CPU/GPU.

System spec:  14900k/64GB DDR5 6000/RTX 5090/8TB M.2 4th gen that DCS is on/2TB M.2 4th gen system drive

It's not a spec issue, and it's not a hardware issue.

I have enough room on that 8TB drive that I restored my 2.9.14 version.  I can run the exact same configuration and mods * though I did adjust a couple for DTC * but otherwise the same, and in .14 everything runs perfectly.  Load times were great, no hitching or pausing like I'm seeing.  The ONLY change is using one version or the other, both with full repairs etc.

Something got broken in .15.  30 years in the IT industry, trouble shooting is not foreign to me.

[scommander2]

5 minutes ago, Nightstorm said:

Something got broken in .15.  30 years in the IT industry, trouble shooting is not foreign to me.

Agree, it is not hardware issue beside the hardware should be able to perform very good result.

At this point, we have done what we can try.... Want to try ED tech support?

[Nightstorm]

2 hours ago, scommander2 said:

Agree, it is not hardware issue beside the hardware should be able to perform very good result.

At this point, we have done what we can try.... Want to try ED tech support?

Well, my thought was that by posting here, I was raising awareness.  Especially if others are having similar issues.

[scommander2]

42 minutes ago, Nightstorm said:

Well, my thought was that by posting here, I was raising awareness.  Especially if others are having similar issues.

Sorry, it is out of my knowledge to help here anymore.  However, I would like to learn if it has something to do with the 576.15 driver for Nvidia 50xx if I get one in the future.

[Nightstorm]

I'd just updated to that driver yesterday; I had a previous driver on Monday.  So, if it IS a driver issue, it's been in the last two generations, and 2.9.14 doesn't have the issue.

[akinilgun]

16 hours ago, sleighzy said:

DCS\bin dizininde bir komut istemi açın ve ardından aşağıdaki komutu çalıştırın ( tek satır). Daha sonra Saved Games\ DCS\fxo ve metashaders2 klasörlerinizi silin, böylece doku önbellekleri o sürüm için tekrar yeniden oluşturulur. 
 

 

After restoring to version 8394 everything went back to normal. Thank you very much.
 

[YoYo]

I also have the impression that something happened, generally it's fine, but sometimes for the first few minutes (2-4) there are these stutters, as if something was being built, a bit like shaders. It doesn't always happen. You can hear the sound stuttering as well in the same time. It's not a matter of frames, just micro freezes for a moment. Then it's okay. Interestingly, it doesn't always happen, and when it does it's only in the menu + at the beginning of the mission. It wasn't there. For now I have no idea what the cause of this is. I have the cores unparked manually btw.

[silverdevil]

@Nightstorm  this topic was raised yesterday. some symptoms sound alike to your's. 

 

[YoYo]

7 hours ago, silverdevil said:

@Nightstorm  this topic was raised yesterday. some symptoms sound alike to your's. 

 

In addition, the DCS closing time has been extended. Previously it was immediate, now the system thinks several times longer and the window is suspended.

[BJ55]

It takes time to release all the memory used by DCS, in TTI Sinai I've reached 8GB VRAM/60GB RAM (CTD, obviously).

[Mr_sukebe]

Can I please suggest you take a scan at this, which might include some useful suggestions:

 

[Nightstorm]

Yea there's enough people having the issues, and they persist with the second hot fix from yesterday.  2.9.15.9599

It's not isolated.  And the telling consistent thing is that the issues did not exist in 2.9.14.8394.

[scommander2]

I was kind of okay prior to 2.9.15.9509, and 2.9.15.9599 is dead in the water now.

Has anyone sounded the alarm to the ED tech support yet?  Should I do so?

 

 

Edited Friday at 07:24 PM by scommander2

[BJ55]

Yesterday I've tested 2.9.13 and in SP loading time/memory usage was the same as current release, 2sec difference can be ignored, like was/is this suggestion: https://forum.dcs.world/topic/357590-4k-32bit-textures-on-all-modules/ , which could be the solution to all of our problems.

 

Edited Saturday at 04:11 PM by BJ55

[HR-Crumble]

Performance is currently diabolical in the game.
Just trying to open and close menu items or move around the mission editor with no units in it is painful. 
 

Trying to load into SP and MP missions takes minutes rather than seconds. 
 

Hopefully it can be fixed. 

[ghawkgu]

On 4/25/2025 at 12:31 AM, scommander2 said:

Sorry, it is out of my knowledge to help here anymore.  However, I would like to learn if it has something to do with the 576.15 driver for Nvidia 50xx if I get one in the future.

On my rig, it looks like the performance issue is caused by the latest Nvidia driver.

When I flew with 2.9.15 and Nvidia driver 576.02, after viewing F10 map and switching back to cockpit view, the FPS dropped down from 45fps to 12fps. That's unplayable.
Then I noticed that the 576.02 came out almost the same day as 2.9.15. So I tried rolling back the Nvidia driver to 572.83, the issue was gone.

Maybe you guys want to give it a try.

System spec:  11900k/96GB DDR4 3200/RTX 3090/ Quest 3 + VD

[YoYo]

8 hours ago, ghawkgu said:

On my rig, it looks like the performance issue is caused by the latest Nvidia driver.

When I flew with 2.9.15 and Nvidia driver 576.02, after viewing F10 map and switching back to cockpit view, the FPS dropped down from 45fps to 12fps. That's unplayable.
Then I noticed that the 576.02 came out almost the same day as 2.9.15. So I tried rolling back the Nvidia driver to 572.83, the issue was gone.

Maybe you guys want to give it a try.

System spec:  11900k/96GB DDR4 3200/RTX 3090/ Quest 3 + VD

02v needs hotfix for this driver, the last is 576.15: https://www.nvidia.com/en-us/geforce/forums/game-ready-drivers/13/563719/announcing-geforce-hotfix-driver-57615-released-42/, it was out already.

Dietect link: https://international.download.nvidia.com/Windows/576.15hf/576.15-desktop-win10-win11-64bit-international-dch-hf.exe

Edited 17 hours ago by YoYo

[sleighzy]

On 4/27/2025 at 6:25 AM, HR-Crumble said:

Performance is currently diabolical in the game.
Just trying to open and close menu items or move around the mission editor with no units in it is painful. 
 

Trying to load into SP and MP missions takes minutes rather than seconds. 
 

Hopefully it can be fixed. 

Please replicate the issue and attach your DCS log file.

[ghawkgu]

16 hours ago, YoYo said:

02v needs hotfix for this driver, the last is 576.15: https://www.nvidia.com/en-us/geforce/forums/game-ready-drivers/13/563719/announcing-geforce-hotfix-driver-57615-released-42/, it was out already.

Dietect link: https://international.download.nvidia.com/Windows/576.15hf/576.15-desktop-win10-win11-64bit-international-dch-hf.exe

Thank you! I've checked the release notes of 576.15, but I do doubt if Nvidia has addressed all the issues regarding performance degradation. I'd rather keep the old driver until next official release.