DCS VR Performance

[Tomsk]

Have other people been finding of late that the the performance of DCS in VR seems to have dropped very significantly?

 

I'm running a GTX 1080 and an i7 8700K, and used to be able to run most missions at solid 45 fps at low settings on my HP Reverb. Now I'm running those same missions on 2.5.6 at absolute total minimum settings (everything OFF or minimal) and I frequently struggle to get 30 fps. In some busier missions with a few more units I often struggle to get 15 fps. It's making DCS essentially unplayable for me at this point.

 

Even more frustratingly when I look at my CPU & GPU usage during a mission I see roughly 25% CPU usage, and 50% GPU usage. So it doesn't even seem certain that more expensive hardware would make DCS go any faster ...

Edited August 29, 2020 by Tomsk

[Steel Jaw]

My GPU shows zero load when running Rift and FPS are the shite with a i5/8600k and 32 gb ram.

[BIGNEWY]

On average with my vive cosmos I am getting 64FPS but anywhere from 45 - 90 depending on what is going on.

 

 

Has anything changed on your system? Windows update, a back ground process?

 

Running in safe mode maybe a good idea so all background tasks are off see if you get better performance.

 

Also many try running their headsets way above the native resolution of their headsets, this is the most common problem I come across when helping people.

 

thanks

[Motomouse]

25% CPU usage or 25% CPU CORE usage?

[Tomsk]

Has anything changed on your system? Windows update, a back ground process?

 

Running in safe mode maybe a good idea so all background tasks are off see if you get better performance.

 

Also many try running their headsets way above the native resolution of their headsets, this is the most common problem I come across when helping people.

 

I have nothing of note running in the background that is consuming CPU or GPU. I am running at native resolution for the headset in Steam VR. Even if I run at PD of 0.5 in the DCS VR options settings I still cannot get more than 25 FPS in some missions. This is not a result of a windows update, the FPS has been very poor since 2.5.6 and particularly since the last few updates (I'm running the most recent Open Beta).

 

25% CPU usage or 25% CPU CORE usage?

 

As shown in Windows Task Manager Performance tab.

[Motomouse]

everything low or off except:

 

Textures High

Terrain Textures High

Visib Range Medium

Shadows High

Res. of Cockpit Displays 1024

Clutter/Grass 0

Trees 41%

Preload 100000

Anistropic 16

 

 

SteamVR 100% Rendering

PD 1.0

 

With these settings I have 60 FPS 95% with dips to 55 FPS over dense building areas in rare cases. I am using options.graphics.stereo_mode_use_shared_parser = true in my autoexec.cfg but I get about the same performance without it. (Flying single player missions I turn usually clouds off because of rendering issues in VR. Multiplayer I live with the errors.) So I do not sense a RECENT drop in VR FPS on my 3600x & 1080Ti& HP Reverb.

[Motomouse]

Sure you are at 100% rendering at the General Tab AND in PER-APPLICATION VIDEO SETTINGS. (Second only visible in SteamVR while running DCS.)

 

(25% CPU in task manager equals 100% on one core if your CPU has got 4 cores.)

[Tomsk]

Sure you are at 100% rendering at the General Tab AND in PER-APPLICATION VIDEO SETTINGS. (Second only visible in SteamVR while running DCS.)

 

(25% CPU in task manager equals 100% on one core if your CPU has got 4 cores.)

 

Yup the general tab is at 100%, and all settings for all programs are at 100% (including DCS).

 

To take a less extreme example: the F-16 Free Flight over Persian Gulf. I get roughly 30 FPS in this scenario with my settings .. unless I PAUSE the mission in which case I get rock solid 45 FPS (i.e. the cap) even if I then use the camera to pan around. Given it's still rendering when paused, it seems likely that the problem is that when the simulation code is running it is stalling the graphics pipeline (I'm a software developer with a background in computer graphics).

Edited August 29, 2020 by Tomsk

[dburne]

Have other people been finding of late that the the performance of DCS in VR seems to have dropped very significantly?

 

I'm running a GTX 1080 and an i7 8700K, and used to be able to run most missions at solid 45 fps at low settings on my HP Reverb. Now I'm running those same missions on 2.5.6 at absolute total minimum settings (everything OFF or minimal) and I frequently struggle to get 30 fps. In some busier missions with a few more units I often struggle to get 15 fps. It's making DCS essentially unplayable for me at this point.

 

Even more frustratingly when I look at my CPU & GPU usage during a mission I see roughly 25% CPU usage, and 50% GPU usage. So it doesn't even seem certain that more expensive hardware would make DCS go any faster ...

 

Yeah I think mine has dropped a little.

[javelina1]

I've noticed a bit of a drop as well.

[Bearskin]

I have noticed the opposite, I am getting a steady 45 FPS on high populated servers for the first time since the 2.5.6 update, I have even set my view distance to ultra which I have never been able to do before. The rest on high apart from medium water, and shadows off. 16X AA 4X MSAA and a PD of 1.5. Maybe the older hardware likes the updates better.