Bad VR performance Rift S

[Fri13]

Do you have double drawing?

So when you keep head still then everything renders correctly.

If you move head, then you get double frames that rotate talkative to each other. So if you look around in circle, then you see all rendered as two opposite rotating frames?

[RvL]

@deathbysybian

Changing graphics settings doesnt really do anything fps wise. 

 

I have tested this many times. The only thing that i notice fps wise is anti aliasing settings. I keep mssa at 2.0. PD at 1.0 in game and OTT at 1.2.

 

Textures high

Terrain textures low

Civ traffic off

Water medium

Visib range medium

Heatblur off

Shadows flat

Res cockpit displays 512

Msaa x2

Depth of field off

Lens effect off

Motion blur off

Clouds standard

Ssaa off

Sslr off

Ssao off

 

Clutter/grass 0

Forest visibility 85

Forest detail factor 1

Scenery details factor 1

Preload radius 70000

Chimney smoke 0

Anastropic filtering  8x

Terrain object shadows off

Cockpit global illumination off

Rain off

Vsync off

 

Lowering this makes no change in fps but makes the game look horrible.

 

@Fri13 im not sure if i understand what you mean. Ghosting? Yes. Lag, yes, screentearing/distortions when i move my head, yes.

 

But this only happens sometimes and sticks for some minutes and recovers and will come back later and will only recover when closing dcs and oculus.

 

@rubbra

Im not on a laptop, but im willing to try anything at this moment.

 

 

Edited June 21, 2021 by RvL

[fab.13]

Hello RvL,

Do you select different Role ( different AirFrame ) in the session ?
Do you use F10 in the session ?

As i  answered in my first post,
there are some temporary increase memory needs when swithing air plane in the same session ( memory managment not tuned i suppose )

 

Other problem met was that F10 map was increasing VRAM need for a moment,
and then FPS go down ( see other thread about that )

On your next multiplayer session,
could you try this :

- disconnect from the server and reconnect before to switch air plane
- don't use F10

And let's see if better or not...

 

PS:

 

Other solution is to check RAM need and VRAM need with Windows tools while playing and when FPS problem come up.

[Fri13]

33 minutes ago, RvL said:

 

@Fri13 im not sure if i understand what you mean. Ghosting? Yes. Lag, yes, screentearing/distortions when i move my head, yes.

 

But this only happens sometimes and sticks for some minutes and recovers and will come back later and will only recover when closing dcs and oculus.

 

The phenomenon is difficult to describe because it is not visible in the mirror video on desktop, but it is on each display on HMD. The double draw is something to do with Oculus because it is as well in the DCS menu after session, until some minute or so it ends in main menu. It can as well exist in the desktop view or Oculus Dashboard after DCS process has been killed.

 

The VR is difficult to debug because you can have one session with serious lag and low FPS, restart DCS and everything is totally fine. You can game a couple hours perfectly, shutdown PC and start later on evening and you have all serious problems running at same time. Or it can just start middle of the session. 

 

It is not about hardware performance, but something in the software with Oculus, Windows, DCS. I have found that often it helps a lot that I set desktop resolution from 4K to HD (1280 x 720). Even when it shouldn't affect at all, but it does.

 

Odd thing is that this can happen as well suddenly and it helps that you remove HMD so proximity sensor turns HMD displays off, and then you put them back on and everything is fine.

 

 

[rubbra]

MSAA does make (at least on my system) a huge impact on FPS. I’d set it to off to start with.

[deathbysybian]

You can leave terrain textures high, but set regular textures to medium.

[RvL]

Thanks for replying guys.

 

@fab.13

 

Im currently only flying the F14.

I do use F10 to be able to navigate searching for air and ground bandits.

Going to be tough not able to use F10 and being effective.

 

My problem doesnt specifically happen after changing airframe.

 

@Fri13

Im not sure im experiencing that problem, maybe yes.

When my problems occur it does effect the oculus main menu also.

After closing DCS it contineous there untill i close oculus and restart and its back to normal.

 

But it really seems to me like massive lag and stutters and distortions at the outersides of my view when moving my head.

 

Tomorrow im going to use a program to monitor my hardware. 

 

@rubbra

Im not seeing any performance hit (when the game/headset does function normally)

going from zero to even 4x msaa.

 

@deathbysybian

I believe changing terrain textures to high will costs more vram so most of the player not having more then 8gb vram turn their groundtextures lower.

Edited June 21, 2021 by RvL

[deathbysybian]

I have the 3070 with 8gb of vram.  Reducing the "textures" to medium fixed my stuttering problems that would come up after too many external view switches.

Better frames too.

FYI, one thing I noticed when the problem started is my GPU would be pegged near 100%, and even backing out to the main menu the GPU would be stuck at 60% or more.

Only resolved by closing DCS and waiting 30 seconds.  (Even the oculus home screen was stuttering until DCS closed completely)

I don't think I've run into that problem with the lower texture setting.

[RvL]

20 minutes ago, deathbysybian said:

I have the 3070 with 8gb of vram.  Reducing the "textures" to medium fixed my stuttering problems that would come up after too many external view switches.

Better frames too.

FYI, one thing I noticed when the problem started is my GPU would be pegged near 100%, and even backing out to the main menu the GPU would be stuck at 60% or more.

Only resolved by closing DCS and waiting 30 seconds.  (Even the oculus home screen was stuttering until DCS closed completely)

I don't think I've run into that problem with the lower texture setting.

Im going to test it tomorrow, see if it helps.

Though 99% on the forums/internet is talking about terraintextures eating vram and not the other textures setting.

 

I remember turning that textures setting lower then high make the cockpit unreadable.

[Dograw75]

Do you have sufficient and steady bandwidth?  That could cause stutters and frame loss in MP while SP runs fine.

[RvL]

5 hours ago, Dograw75 said:

Do you have sufficient and steady bandwidth?  That could cause stutters and frame loss in MP while SP runs fine.

 

300/30mb/s

[fab.13]

Hello,

 

I agree with some guys you should try to reduce VRAM need at minimum value

And see if problem continue
 

F14 is one of the module that need the most of VRAM ( high textures )
How many VRAM you have ?
and what are the VRAM usage when playing ?

 

So try lowering all textures definition,
there is a mod called 'F14 clear cockpit' to be able to read labels in the F14 cockpit to help.

[RvL]

10 hours ago, fab.13 said:

Hello,

 

I agree with some guys you should try to reduce VRAM need at minimum value

And see if problem continue
 

F14 is one of the module that need the most of VRAM ( high textures )
How many VRAM you have ?
and what are the VRAM usage when playing ?

 

So try lowering all textures definition,
there is a mod called 'F14 clear cockpit' to be able to read labels in the F14 cockpit to help.

 

Yesterday i got a short session trying out with medium textures and low terrain textures.

 

I thought i saw some improvement, but the session wasnt that long to be really sure. Will have to test sone more.

 

I have a 3070 with 8GB Vram btw.

[fab.13]

Remember to monitor VRAM usage for next try.

 

Start Windows Task Manager ( low refresh frequency )

Start DCS and play as usual

Go to Windows Task Manager sometime during session to see average vram usage

Go to Windows Task Manager if problem come up and see vram usage ( and other values like CPU .. )

 

PS:

I prefered to buy a used 1080ti ( 11.5 go ) instead of 30xx ( 8Gb ) after having monitored DCS VRAM Usage...

[RvL]

Havent had much time to test the last couple of days.

 

Did a short PVE server session and only had a short fps drop after viewing some other players by pressing F2 that locked my fps at 20fps.

After a short time, like within less then a minute it recovered itself.

 

But, it was not busy at that time on the server, less of 10 players wich plays a huge role.

 

Since the last nvidia update im under the impression it helped in VR performance, but im not quite sure yet.

 

Still got more testing to do with longer sessions and monitoring hardware activity.

[RvL]

Been playing some more PVE matches when i had some time, and it seems like im not getting the extreme stutter anymore what forces me to exit the game and restart Oculus.

 

Unfortunatelly DCS does it for me now cause im seeing more CTD's then before since the latest update. But no report will be made after the crash.

 

Im still getting low FPS down to 18fps on certain areas, what seems like Caucases is more sensitive for this compared to Persian Gulf.

Which is a little weird, before PG used to be more demanding.

The low FPS is mostly situated around airbases/carriers on servers with like more then 10 players on it.

 

Still need to monitor cpu/gpu/vram/ram while playing.

 

Edited July 12, 2021 by RvL

[RvL]

I have been monitoring my hardware while playing on a 4YA PVE server on the Causases map with 16 players.

 

Was having stutters, screentearing when moving my head immediately from the beginning while being on the ground with an fps of arround 20.

 

Made two screenshots. One while playing and one while doing nothing.

 

When playing my vram goes to 7.8. Been testing with the lowest visual settings up to the highest (PD excluded, kept that at 1.0 in game and 1.2 OTT.

 

Changing these settings doesnt make a change in fps. It only changes my in game visuals. So i just keep that the way like i posted before.

 

Weird thing is, and i have said this before.

After the bad experience on a server with 16 players i changed server to another 4YA PVE server with just 8 players and i have a smooth experience.

Edited July 12, 2021 by RvL

[fab.13]

Hello,

 

I think 58% GPU explain you get low FPS

 

Occulus works this way :

- it try first to render the 80 hz target ( 90hz in rift )

- If the GPU is not able to render 80hz, it render 40hz ( divide by 2 )

- If the GPU is not able to render 40hz, it render 20hz ( divide by 2 )

and so on

 

So Something does not allow your GPU to render 40Hz :

- CPU load could be the root cause.

- GPU or CPU temperature

- ...
 

Did you tried without mirrors ?

Did you ALT + ENTER to get FullScreen at start ( on main menu ) ?

Did you removed All Mods ?

Did you tried another plane with lower graphic needs ( SU25, M2000 ) ?

 

Comparing the CPU FrameTime between the on 2 MP sessions you tested should be interesting

 

PS:

- 3,63 Ghz seems to be low value in regard of DCS need ...
what is the max speed of your CPU ?

 

Edited July 13, 2021 by fab.13

[streakeagle]

I have the Rift S, the Quest 2, and currently fly DCS with the Quest 2. Recent patches have killed my DCS performance in VR. I used to be able to fly the G2 locked at 45 fps by forcing motion reprojection on. Without forcing it, the frame rate was inconsistent between 45 and 90 which looked and played bad. But the latest 2.7 releases crippled my performance. I can still get 45 fps if I fly basic instant action missions with no clouds. But to fly the same Korea and Vietnam multiplayer servers I have been flying for many months, I had to lower my DCS graphic settings and lower my G2 from 90 Hz to 60 Hz to attempt to lock my frame rate at 30 fps. Unfortunately, I can't always maintain 30 fps and the game starts stuttering despite displaying 30 fps or shows drops to the 20s and even teens at times.

 

I have been following the forums and it seems the DCS components of my problem are a combination of the clouds (which weren't a problem until after the patch that "fixed" the cloud jitter in VR) and new canopy reflections. But it also seems there may have been a recent Windows 10 patch that has caused some PCs to have performance issues leading Microsoft to offer a rollback app to try to help those affected.

 

I am currently running a Ryzen 5800x with 128 GB of PC3200 RAM, so it is possible something in the AMD drivers isn't playing well with DCS and/or the G2. I need to do some testing with the Quest 2 and Rift S to see if I have the same problems.

 

When I am in game at 30 fps (or less when it gets bad), none of my cpu cores are at 100% capacity and my gpu shows about 50 to 60% capacity with the 8 GB of VRAM pegged to the limit. when I go back to 90 Hz with a locked 45 fps, my GPU starts running between 80-90%. I haven't really been able to get my VRAM to anything less than 8GB and I won't go below medium textures (low makes many cockpits too blurry, even in VR). As soon as new GPUs start showing up at MSRP or used ones at a discounted price, I intend to get either a 3090 RTX or a 6900 XT. The VRAM on the 3090 is very attractive: fast and large. The 6900 XT has better raster performance at the cost of slower and less VRAM. If 6800 XT's show up at a good price, I might settle for one of those due to cost effectiveness over the 6900 XT while still having the same VRAM size and speed.

[RvL]

17 hours ago, fab.13 said:

Hello,

 

I think 58% GPU explain you get low FPS

 

Occulus works this way :

- it try first to render the 80 hz target ( 90hz in rift )

- If the GPU is not able to render 80hz, it render 40hz ( divide by 2 )

- If the GPU is not able to render 40hz, it render 20hz ( divide by 2 )

and so on

 

So Something does not allow your GPU to render 40Hz :

- CPU load could be the root cause.

- GPU or CPU temperature

- ...
 

Did you tried without mirrors ?

Did you ALT + ENTER to get FullScreen at start ( on main menu ) ?

Did you removed All Mods ?

Did you tried another plane with lower graphic needs ( SU25, M2000 ) ?

 

Comparing the CPU FrameTime between the on 2 MP sessions you tested should be interesting

 

PS:

- 3,63 Ghz seems to be low value in regard of DCS need ...
what is the max speed of your CPU ?

 

 

 Thanks for the reply.

 

Im not using mirrors cause of them eating too much fps.

I have tried alt enter but makes no difference.

I used to use the F14 lantirn mod but deleted it.

I have tried the A10C wich i own but that also makes no difference.

 

My Ryzen 5 2600 cpu has a clockspeed of 3.4ghz, and turbo to 3.9ghz.

 

I used to overclock it above 4ghz but since 2.7 im not able to overclock due to giving CTD's all the time

 

[RvL]

Oke did some more testing while monitoring gpu usage.

 

Im not familiar with these values of what is normal, but i would think that getting the best performance out of the gpu would make it go towards the 90/100% usage?

 

What did i notice?

 

When i play DCS in VR, for instance on a MP server i notice my gpu usage is mostly arround 40 a 50%.

When im looking up in the sky or whenever my fps can go up to 80fps my gpu usage also goes towards the 80/90%.

 

So gpu usage is related to the gpu usage percentage?

 

Being on the ground of a airport with other players or wherever my fps gets towards the 20fps and the tearing and lag is in progress i see my gpu usage staying arround 30%.

 

Other test i did and noticed.

When i start DCS abd stay on tge main menu and not activate the Rift S headset im seeing above 200fps on the mirror screen on my monitor, and my gpu usage is 100%.

 

Untill i activate the sensor in the headset and my fps goes to 80fps and my gpu usage goes to 40 a 50%.

 

I've also tested without ASW on and then the fps is the same as the gpu usage percentage.

 

Last test i did was going back to 2D and that made my fps be arround 140 in the air and arround 80 in more populated areas like on the ground/airfields/cities.

My gpu usage went between the 50 and 90%.

 

Anyone with more knowledge about this has anything to share?

 

Also yesterday after searching for low gpu usage on google i removed Gforce Experience, clean installs of Nvidia driver, checking performance settings but all didnt help.

Edited July 15, 2021 by RvL

[fab.13]

I believe that your CPU - RAM is the bottleneck of what you ask to your machine on the slow session.

1) Comparing the CPU FrameTime between the on 2 MP sessions you tested should be interesting

2) And the following thread speak about VR performances related to CPU

 

 

 

 

[fab.13]

On 12/8/2020 at 10:31 PM, Gladius said:

If I understand correctly now, would it do me more to keep the GTX 1080TI and replace my AMD Ryzen 2600X with an AMD Ryzen 5900X or 5800X?
So far a new GPU would be less useful ...

 

On 12/8/2020 at 11:08 PM, JayRoc said:

If you're using a "lower res VR HMD" absolutely yes! The frametimes will also be more consistent which is really nice to have in VR.

If you´re planning on upgrading to a "high res HMD" like G2 or Pimax 8K it depends. A lot of multiplayer? Single player? Frames before quality?

 

In your case i would start with tuning your RAM. And if you keep your Rift - the CPU right after it. That would be the most cost efficient upgrade.

 

 

[RvL]

1 hour ago, fab.13 said:

 

 

 

Some time ago i asked in another topic about my cpu and i believe it was Bignewy who replied saying my cpu cant be the issue.

 

Also tried some sites to test and see if there is a bottleneck my system showed up great.

 

Im not a expert on this at all and how reliable this information is.

 

If the cpu is the bottleneck, shouldnt its usage % max out then?

[fab.13]

Some people did benchmark ( a lot of work ) that you can see in the thread about cpu

 

It is about pure performances subject that you should consider as well as same level than BN point of view