SteamVR High performance mod

[IR.Clutch]

Hey,

Testing a modified OpenVR DLL for SteamVR. I found a sufficient increase in FPS and stability comparing to a regular DLL with which even on PG I would have 25 or less FPS in the same weather conditions. The test was conducted on the Syria map. 2K OBS video has been recorded during the flight. There was no FPS drop below 27. In clouds 40-45

I'd be glad if someone could test it too.

link  - https://github.com/fholger/openvr_fsr

Just replace the regular openvr_api.dll

specs: DCS 2.8 SteamVR, latest OpenBeta Graphics - Gainward RTX 3080 12GB i7 11700K, DDR4 Crucial 64Gb 3200 HP Reverb G2 Thrustmaster Throttle(Deltasim mod), Virpil WarBRD base, Thrustmaster A-10/F-16c stick

youtube video 

 

Edited November 18, 2022 by IR Sky

[speed-of-heat]

If you do a search on fholger you should find a number of references to it.

 

[IR.Clutch]

4 минуты назад, speed-of-heat сказал:

If you do a search

Sorry)  I didn't mean to spam) honestly

[speed-of-heat]

No worries, i haven’t used it since I moved to openxr

 

[IR.Clutch]

56 минут назад, speed-of-heat сказал:

i haven’t used it since I moved to openxr

I was testing latest OpenXR tools yesterday as well with the turbo mode but I didn't get that kind of results and stability. The MOD without live recording will be even more stable and a higher FPS.

Edited November 18, 2022 by IR Sky

[edmuss]

10 minutes ago, IR Sky said:

I was testing latest OpenXR tools yesterday as well with turbo mode but I didn't get that kind of results and stability. The MOD without live recording will be even more stable and a higher FPS.

 

The turbo mode will do nothing to improve frametimes, only to get the FPS to match the frametimes in certain circumstances when the WMR runtime throttles the frames to reduce latency.  Openxr toolit does the same FSR upscaling as openvr_FSR so you should see similar results with equal settings.  With FSR I can get about 3-5 ms reduction which could put me very close to 90fps all the time, however I don't care for the aliasing introduced by the upscaling so prefer to run without it and get 65-80 fps reliably @60hz headset refresh rate.

[WipeUout]

2 hours ago, IR Sky said:

I'd be glad if someone could test it too.

Did test quite extensively in 2.7.18.  No magic here as this will increase your FPS but will cost a lot in image resolution and quality.  This mod is based AMD's FSR upscaling technique.  Here are the increases I got at the same settings but different "quality" value:

Sharpness : 0.9, Quality =0.77 (Delta = 13.8 FPS)

Sharpness : 0, Quality =0.87 (Delta = 7.6 FPS)

Sharpness : 0, Quality =0.85 (Delta = 9.0 FPS)

The problem I experienced with this mod is that I did gain FPS but when trying to get better clarity and resolution, I found myself having to increase super sampling to a point where it  negated the FPS gain to get an acceptable image clarity.  After a short while, I went back to my old settings without this mod, and realized that my image quality is much better without it after all.  There is no magic, you have to compromise on quality to get more FPS.

[edmuss]

1 minute ago, WipeUout said:

 After a short while, I went back to my old settings without this mod, and realized that my image quality is much better without it after all.  There is no magic, you have to compromise on quality to get more FPS.

This was my findings aswell, I get better image quality and equal performance by reducing resolution to 80% than FSR upscaling 80% up to 100%.  There is also a computational GPU overhead associated with upscaling so there is a point of dimishing returns, on my machine it takes about 0.8-1ms to upscale at 0.77; as your framerates get higher, this 1ms hit equates in more cost.

11ms = 90fps vs 12ms = 83fps is a 7fps delta

19ms = 52fps vs 20ms = 50 fps is a 2fps delta

I'm not sure if the computational load increases if you increase the amount of upscaling (by reducing the value), it's not something that I've dedicated much time to.