Fps tank when changing aircraft or server

[hazzer]

Hi all, 

I keep having an issue that occurs after switching aircraft or mp server. The framerate drops very low to a rediculous stutter. It occurs when changing aircraft, opening menus after some time has passed playing the game. It has gone on for a few months now. 

The odd thing is that if I click off dcs, open task manager or display advance frame times in steam vr the issue sometimes goes away. Anyone had anything like this?

Seems like there is a memory leak or cpu issue, very annoying. 

 

[BIGNEWY]

please include your dcs log and system spec, and if you use HDD or SSD. Also the size of your pagefile and how much space you have left on your disk. 

 

A track replay as an example would also help, we can compare on our systems 

 

thanks

[hazzer]

 

On 5/1/2021 at 3:15 PM, BIGNEWY said:

please include your dcs log and system spec, and if you use HDD or SSD. Also the size of your pagefile and how much space you have left on your disk. 

 

A track replay as an example would also help, we can compare on our systems 

 

thanks

Apologies in the delay replying,

 

DCS log and Track attached

 

System Specs;

RTX2080ti

Intel Core i7 9700K

32gb Ram

ROG STRIX Z390-E GAMING

DCS saved on SSD

 

Pagefile

dcs.log

 

[hazzer]

Any help? 

[Werewolf_fs]

En 1/5/2021 a las 16:07, hazzer dijo:

Hola todos, 

Sigo  teniendo un problema que ocurre después de cambiar de avión o servidor mp. La velocidad de fotogramas cae muy baja a un tartamudeo ridículo. Ocurre al cambiar de avión, abriendo menús después de que haya pasado algún tiempo jugando al juego. Ha durado unos meses. 

Lo extraño es que si hago clic en dcs, abro el administrador de tareas o  muestro los tiempos de fotogramas avanzados en steam vr, el problema a veces desaparece. ¿Alguien ha tenido algo como esto?

Parece que hay una fuga de memoria o un problema de CPU, muy molesto. 

 

 

I had a similar problem with G1 and G2, if I forced reprojection to always on (montion vector). Changing it to AUTO and the problem has disappeared. 

I recommend keeping the reprojection options (or motion vector) in AUTO, in WMR for steam VR or in Steam VR, depending on where I activate it

Edited May 18, 2021 by Werewolf_fs

[hazzer]

On 5/18/2021 at 9:05 AM, Werewolf_fs said:

I had a similar problem with G1 and G2, if I forced reprojection to always on (montion vector). Changing it to AUTO and the problem has disappeared. 

I recommend keeping the reprojection options (or motion vector) in AUTO, in WMR for steam VR or in Steam VR, depending on where I activate it

 

interesting... 

 

I have never actually use reprojection in steam or wmr. I disabled it as it gave a similar effect thinking back (however not as severe). 

[Gizzy]

On 5/1/2021 at 3:07 PM, hazzer said:

Hi all, 

I keep having an issue that occurs after switching aircraft or mp server. The framerate drops very low to a rediculous stutter. It occurs when changing aircraft, opening menus after some time has passed playing the game. It has gone on for a few months now. 

The odd thing is that if I click off dcs, open task manager or display advance frame times in steam vr the issue sometimes goes away. Anyone had anything like this?

Seems like there is a memory leak or cpu issue, very annoying. 

 

 

All the time, every single day..... 80% changing planes 90% changing servers - always MP SP not so much
Running a HP G2 via

i90100k W/C

64gb

ROG MAXIMUS HERO

2800TI

WIND 1O PRO ON M2 WITH 560GB SPARE

PAGESYS AUTO

 

Only sure fix is close DCS close WMR close STEAMVR and restart... Terrible pain..

Most settings are high and FPS 40-60 then on model change FPS drops 10-15 and un-useable. 

No idea whether it is DCS or Steam or Windows..

 

Edited May 22, 2021 by Gizzy

[Thundercat710]

Happens a lot for me too, following

[NaCH]

Same issues here, most of the time in intensive multiplayer sessions like blue flag where there are tons of script and you see the constant flashing 

on the VR opening the slot screen or the rearm and refuel pop up. 

 

Prior the  update on of this week it was working perfectly without any issues. 

 

I can recreate the problem in intensive planes like the F14A really consistently. In Single player If I jump from plane to plane in the end I end up with a slide show even in the 

menu screen. 

 

 

Running a HP G2 via

3700X

32gb

ASUS x570 TUF 

2080TI

WINDOWS 1O PRO 2 M2 and SATA SSD in the M2 for the OS I got 500GB

Page file is Automatic 

 

I put the crash logs and also latest logs. 

 

Let me know if more information is needed. 

dcs.20210528-224941.zip

Edited May 31, 2021 by NaCH

[NaCH]

Another crash today, sent the dump via the application and here is the Log 

 

Running a HP G2 via

3700X

32gb

ASUS x570 TUF 

2080TI

WINDOWS 1O PRO 2 M2 and SATA SSD in the M2 for the OS I got 500GB

Page file is Automatic 

dcs.log

[hazzer]

On 5/22/2021 at 1:02 AM, Gizzy said:

All the time, every single day..... 80% changing planes 90% changing servers - always MP SP not so much
Running a HP G2 via

i90100k W/C

64gb

ROG MAXIMUS HERO

2800TI

WIND 1O PRO ON M2 WITH 560GB SPARE

PAGESYS AUTO

 

Only sure fix is close DCS close WMR close STEAMVR and restart... Terrible pain..

Most settings are high and FPS 40-60 then on model change FPS drops 10-15 and un-useable. 

No idea whether it is DCS or Steam or Windows..

 

 

Glad to see it isn't just me having this issue. Yeah that's the only solution I have found to stop it just to test I set my page file stupidly high and no difference. Seems like a memory leak associated with vr

Edited June 5, 2021 by hazzer

[CatByTe]

Hi, I am encountering the exact same issues prescribed by Hazzer. I am also using a G2. Wondering if there's any update on this?

[FoxTwo]

Fairly certain that this is a symptom of vram memory exhaustion and the inability of DCS to stream in assets without killing the cpu. Being single threaded, the IO operation consumes most of the cpu available for draw calls. Eventually it should settle down and return to normal but this can take several minutes.

 

Maybe this limitation will go away when they move over to vulkan.

[NaCH]

On 6/12/2021 at 5:30 PM, FoxTwo said:

Fairly certain that this is a symptom of vram memory exhaustion and the inability of DCS to stream in assets without killing the cpu. Being single threaded, the IO operation consumes most of the cpu available for draw calls. Eventually it should settle down and return to normal but this can take several minutes.

 

Maybe this limitation will go away when they move over to vulkan.

 

Could be, but whatever it is started in the last patch. The first 2.7 version it was awesome with no issues at all other than eclectic clouds. 

 

The F14 is really the trigger, specially the A that is the one that I fly the most.  

[NaCH]

Is there any invesitagation on this ? 

I can reproduce the ploblem each time after jumping from plane to plane in MP. 

 

[cyristvirus]

Same problem, no fix besides alt tabbing for a bit and to let it catch up. Started for me after 2.7, never had a issue before. No changes besides the patch.

[RvL]

You guys problems sounds a lot like the issues im having on MP servers.

 

Im also suffering from big fps drops wich locks it at arround 18/20 fps with massive stutters/lag and screentearing out of nowhere.

 

Closing the game even makes the oculus home screen (Rift S) having the same problems untill i restart it.

 

Yesterday though i waited and after a few minutes it gained back its fps to a stable 40.

 

 

 

 

 

[cyristvirus]

Yeah I think we need to keep bringing this up so others who have this same issue talk about it here. If we dont I am not sure this will be noticed.

[NaCH]

I still have the issue, in some situations Alt-TAB does help but most of the cases jumping in to the f14 is almost impossible. 

I need to stop SteamVR and WMR to recover the FPS. If not it becomes a FPS slideshows even in the menus.   

[Japo32]

Same problem. Glad I am not alone. Sad still ED didn't say anything about this.

[RealDCSpilot]

It has been mentioned a lot already, it's VRAM overflow. As soon as this happens, Windows tries to cache VRAM ressources to RAM (so called Shared Memory). From there your whole system goes into a crazy data shoveling loop (CPU, HD and RAM controller workload rises). If you are lucky, it takes some time to sort itself out. The other only thing you can do is lowering VRAM buffer usage (by turning down render resolution and texture quality for instance).

Edited July 3, 2021 by RealDCSpilot

[cyristvirus]

I cleared out my environmental data for windows mixed reality and this pretty much eliminated the issue for me. Ill keep testing but 3 days in and I am still good.

[burnzoire]

Same issue here when flying the F-14B. Resolves itself after 10s or sometimes takes minutes to resolve. Alt-tabbing sometimes wakes it up too. 
 

AMD 3900XT

Asus ROG Strix 3080

32Gb RAM

HP Reverb G2

No crashes to report  

 

Edited November 13, 2021 by burnzoire

[Morat]

Same Issue here still.

If I jump between A10C2 - F14B - F16C (or any sequence of them) I end up with vomit inducing lag. I just quit the server when I change planes now. It's quicker than waiting for it to sort itself out (which it used to do in previous versions after a couple of minutes).

CPU 9700K, GPU 3080, Reverb G2, RAM 32Gb 3200Mhz,  SSD Samsung 980Pro 1Tb (dedicated to DCS)

[Sleepy Joe]

Same issue for me. Doesn’t make me hopefull seeing this is something that’s been an issue for a while.