reported Severe loading performance issues with 2.9.15

Mainstay · April 24

Same problem here. Loading takes ridiculous long.. especially MP.

I did a slow repair, disabled mods, deleted FXO and meta folders.
Excluded everything in my AV DCS related.

All this on a high end pc (12900K, 64gb ddr, 4TB nvme, rtx4090, win11, pimax crystal)

It’s getting frustrating to be honest. Every other application or game loads up within seconds including flightsims except DCS.
Also what’s up with the weird loading sequence screens on VR? Why can’t we see normal loading bars as if starting a session without VR. Half the time I can’t even see what the loading status is et cetera because it just hangs and you have to wait minutes for it to proceed to the next screen…

Nightstorm · April 24

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 · April 24

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 · April 24

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 · April 24

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 · April 24

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 · April 24

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 · April 24

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 · April 24

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

YoYo · April 25

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 · April 25

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 · April 25

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

Nightstorm · April 25

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 · April 25

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 April 25 by scommander2

BJ55 · April 26

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 April 26 by BJ55

HR-Crumble · April 26

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 · April 27

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 · April 27

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 April 27 by YoYo

sleighzy · April 27

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 · April 28

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.

BJ55 · April 28

This is not a GPU driver issue, I'm on 552.44, nor a chipset drivers, BIOS, OS issue, it's how DCS engine is handling the vast amount of data and computations needed by the sim.

YoYo · April 28

6 hours ago, ghawkgu said:

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.

Thx, so we are waiting for the next drivers. I have now 576.15 but I won't reinstall it. I rather think that it is some problem in DCS, which does not manage components (CPU) properly from 2 patches before. Yesterday I encountered again that for the first 3 minutes DCS stuttered right at the beginning of the mission (including the sound), and then everything was super smooth

Dedbeat · April 28

I’m also having random ctd’s, and also issues with terrain not loading on the Germany map.

sleighzy · April 30

@HR-Crumble, @Dedbeat Please attach your DCS log files, and any other dcs.log.<timestamp>.zip files when this occurs. Not much information to go on without these. There are a few reports of this problem across many forum posts. Would be good to see logs to determine if anything is common across these, and what others have done to resolve may also be applicable to you.

Nightstorm · April 30

One of these performance related threads mentioned having MFD's configured. In fact, I read that someone said there two examples two people having different MFD's configured.

I also have MFD's but they're off, but I also have a sensor panel running from Aid64. My monitor config was configured to use up to three MFD's if I have them turned on.

I just disabled those extra monitors in my monitor config, and wouldn't you know it? No more hitching or issues. I tested it several times in a row. Performance is nearly normal.

So, that would certainly suggest it has something to do with multi-monitor set ups. In VR there's no issue at all, as VR isn't using multi-monitor.

I think we're on to something here. @BIGNEWY Does everyone having problems have more than one monitor configured in DCS?

Sign In

reported Severe loading performance issues with 2.9.15

Recommended Posts

Mainstay

Nightstorm

scommander2

Nightstorm

scommander2

Nightstorm

akinilgun

YoYo

silverdevil

YoYo

BJ55

Mr_sukebe

Nightstorm

scommander2

BJ55

HR-Crumble

ghawkgu

YoYo

sleighzy

ghawkgu

BJ55

YoYo

Dedbeat

sleighzy

Nightstorm

Recently Browsing 1 member