2.9 Frame Time Stuttering

[noisy_lightning]

Hardware: I5 10600K (OC), 3070TI, 32gb DDR4 3200 CL14, DCS on a Samsung 980Pro NVME. Running at 1440P. After updating I cleared the FXO and Metashaders2 folders as I normally do.

Updated to 2.9 last night, and tested with a mix of settings, DLSS on (with DLAA and without and tested most of the settings, qual, perf etc), DLSS Off with various AA options chosen. SSS was on throughout all testing.

The issue is not performance specifically. I was using the same Instant Action mission each test performance with each change in a "controlled" environment (F15E - Low Level (Day)). My FPS is high, and usually between 80-100fps. But the issue is significant and random frame time stuttering, which will last up to 1.5 seconds or so then continue back with the high FPS.

Disabling Vsync helped a little, but hasn't stopped it. The only thing I have yet to do is to update my drivers, but they are no older than 8 weeks at the most....

Any ideas for solutions? As with this stuttering it brings an otherwise flawlessly performing gaming session to being unplayable.

Edit: The in game FPS window says I am not bound by either CPU or GPU as it flicks between both equally.

Edited October 20, 2023 by noisy_lightning
Added Context

[TrigaNZ]

Got the same issue, I've run out of ideas.

 

[Scotch75]

I have the same issue too. Even going back to MSAA (which used to be smooth) has unplayable stuttering. I'll post a log and track in discord when I get back home.

Sent from my SM-G998B using Tapatalk

[papaye]

Same problem stuttering in VR at startup menu , flying is not possible 

hardware core i7 6700 , 32GO RAM , RTX 3090 , SSD 

any solution ???

 

[PLUTON]

If you are flying in vr try turning sss off
because it is linked with the movement of the head which makes the shadows move
maybe this is related because I have the same problem and I could only test it this evening

[papaye]

Same problem stuttering in VR at startup menu , flying is not possible 

hardware core i7 6700 , 32GO RAM , RTX 3090 , SSD 

any solution ???

 

[reivaj]

I have the same issue too, Stuttering. 

[Flyingfish]

I also have this issue

RTX 4090

5800x3d

32gb 3200mhz

Installed on M.2

Quest pro 

[noisy_lightning]

I have done some testing tonight. Nothing I change settings wise has made it worse or better.

When I crashed though and had no aircraft to see I used my mouse scroll wheel to move the camera back and forth and it triggered all sorts of frame timing issues. I have free spinning wheel on my mouse so it can send constant commands, and that triggered the stuttering.

In addition, with zero aircraft loaded and still at the crash camera, any large input on my stick (virpil cm2 base with CA grip) and I got the same.

Its now my belief that my stuttering is coming from the usb devices saturating dcs. Enabling or disabling hotplug did nothing to fix it.

Edited October 20, 2023 by noisy_lightning

[Jimmytime]

I'm having the same issue. Everything is fine, FPS is is pretty solid around 150 FSP which is extraordinary. I was getting about 90 FPS in 2.8. As I fly around a bit and get away from the airbase is when I start to notice. I can see the frames drop to 40 and then shoot right back up to 180 and drop again over and over. It's so fast it's hard to read the numbers so it may be even lower. Happens on several maps and aircraft.

My specs:
i7-13700K, 64 GB RAM, RTX-4080 @ 3840x2160,  2TB 990 PRO NVMe.

[Skael]

4090

13900K

64GB 5600 DDR5

m.2 install.

Reverb G2

 

I was getting 90FPS on 2.8 now I'm getting close to 60. I've tried...

removing Metashader/FXO, reinstall DCS, disabling all open XR stuff, disabling e cores in bios, disabling certain CPU core affinity in taskman. I even went back and tried to set everything back to 2.8 settings as much as possible, still can get nearly the frames I used to. Any Ideas?

Edited October 20, 2023 by Skael

[Jimmytime]

Skael - Did you check  if Vertical sync is enabled in Nvidia Control and in Game, or maybe Max frame rate? 

I may have found something and it may be with higher end PCs. If might be that we're hitting the theoretical FPS limit. I've noticed when it's normal it shows GPU Bound and shows a theor. limit which on mine is very high like 380 FPS where the actual FPS is around 180 (Seems to max out there for me.) When I was flying over water with little detail it would start to stutter, also zoomed on the panels, or F10 map would do it too. It would switch from GPU BOUND to CPU BOUND FPS LIMIT. Not sure if this is a 4k and 2K thing and may not affect 1080P? Disabling efficiency cores did not help.

I've set my max frame rate to 180 and background max to 180. Going to test some more, will advise.

Per Lange_666:
Default FPS is set to 180 FPS in Graphics.lua file in \Program Files\Eagle Dynamics\DCS World OpenBeta\Config.

Will only help if you are hitting 180 FPS, thanks to Lange_666, helped me out for sure. 

 

 

Edited October 21, 2023 by Jimmytime

[Flappie]

Please check this thread:

TL;DR

There is a possibility that one of your CPU core becomes crazy during DCS startup, causing random freeze even in main menu. If that is your case, you can disable said core before DCS is launched, then re-enable this core when you reach DCS main menu.

[Jimmytime]

Thanks Flappie.

That thread is 13 pages deep. Where in the thread or how do you disable the core? Setting the Max FPS to 180 seems to be working for me but that's only if you are reaching 180 FPS and theoretical CPU of 450 FPS, I think.

Edited October 21, 2023 by Jimmytime

[Flappie]

Here you go:

 

[Lange_666]

13 hours ago, Jimmytime said:

Setting the Max FPS to 180 seems to be working for me but that's only if you are reaching 180 FPS and theoretical CPU of 450 FPS, I think.

Are you aware that DCS itself is limited to 180 FPS by default in its graphics.lua (maxfps = 180)?

[Rissala]

+1 on bad frame time stuttering after 2.9

i5 7600K with 32 GB of ram
1070 8GB

[gizmo]

Hi all,

I'm having bad stuttering. I'm running on an AMD 5950X with 32GB Ram and a 3090 RTX card. Any ideas how to resolve this. 

 

Thank you

 

Edited October 21, 2023 by gizmo

[Jimmytime]

7 hours ago, Lange_666 said:

Are you aware that DCS itself is limited to 180 FPS by default in its graphics.lua (maxfps = 180)?

I was not aware, thank you. I will adjust, just thought it was a hard coded limit. I’m not sure I understand why it flips to CPU bound. Looking for a CPU max limit as well.

[Jaymz]

Same here. Happened in MT and non MT. I haven't changed any graphics settings and tried with only a FC3 plane in mission editor. No VR.

I rollbacked to 2.8 and the stuttering stopped. It's a 2.9 bug clearly.

My specs are quite simple:

7600k, 1060 6GB, 32 GB RAM. Installed on SSD.

Edited October 22, 2023 by Jaymz

[Lorenzo.D]

I have some shacking with 2.9. In VR .
My head Is block but the visual scheking. Before the update all was good

Inviato dal mio CPH2219 utilizzando Tapatalk

[Simpit]

Same problem here. All runs fine in MT-Mode before installing 2.9. Now massive stuttering and game freezes for more than 1 second!!

This is the same issue as in the begining of MT. After DCS has solved the problem, now - after the release of 2.9 - same problem - think it is caused by CPU-Core-usage (see below).

[noisy_lightning]

Some further testing tonight, and my previous post on input from devices causing it I no longer think is the cause.

VRAM is the cause. Whenever new textures are being loaded into the game such as flares or explosions its causing the problem. If for example I am flying low level in a valley and pop up, stuttering occurs, this is as it loads new textures in. I have tried lower preload settings though, and lower texture settings and nothing solves it.

To clarify, my 3070ti (8gb) ran 2.8 perfectly, with the same VRAM being capped out fully by DCS, it used to just spill over seamlessly to RAM, but now I seeing DCS not use all my system ram and stuttering like mad when it runs out of VRAM.

Never thought i would say this, but guess I am going to have to shelve DCS and stick with FS2020 till ED sort this out.

Edited October 22, 2023 by noisy_lightning

[Lange_666]

7 hours ago, noisy_lightning said:

Whenever new textures are being loaded into the game such as flares or explosions its causing the problem.

That's nothing new, loading unused objects/textures like flares or explosions has been causing stutters since the very beginning of DCS.

[noisy_lightning]

6 hours ago, Lange_666 said:

That's nothing new, loading unused objects/textures like flares or explosions has been causing stutters since the very beginning of DCS.

Not for me, up till last week 2.8 ran immaculately. I would rather sacrifice the uplift of 15-20% "Fps" in 2.9 I am getting now to get rid of the stutters which are new.