2.8 update has 20 % fps loss on pimax8kx and 15 fps loss on Varjo Aero (RTX 4090)

[zildac]

4 minutes ago, Supmua said:

Latest driver.  Just did around 45 min of Apache flying, pretty much one of the most taxing aircrafts right now and it's pretty smooth with framelock at 45.  It must be some background process causing your stuttering.  I'm also running Asus Tweak III in the background since I overclock the heck out of my 4090, no issue.

 

Agreed, but I run very little. And to the best of my knowledge, nothing new has crept in, but perhaps it has.

[Supmua]

1 minute ago, zildac said:

Agreed, but I run very little. And to the best of my knowledge, nothing new has crept in, but perhaps it has.

Switch to OpenVR and run fpsVR, check CPU and GPU FT graphs see which is causing the stuttering?

[zildac]

10 hours ago, Supmua said:

Switch to OpenVR and run fpsVR, check CPU and GPU FT graphs see which is causing the stuttering?

May try that. There is no FPS drop noticeable in the OXRTK FPS counter, but if you look at the terrain, you can see a slight stutter every few seconds. It's still smooth to fly and hardly noticeable, but the fact it wasn't there before irks me

[AlpineGTA]

Just in case it's relevant, since 2.8 I'm also noticing a slight stutter every few seconds when looking down at the terrain, even though I'm keeping a steady 72fps. And I'm running standard Oculus software with a Quest 2 and an AMD 6900Xt card. So maybe it's not an Nvidia driver or OXRTK issue?

[zildac]

Just to update, it's present even when using SVR and no spikes in cpu or gpu frametimes. It's very subtle and only noticeable if looking directly at the terrain. Can also be seen looking at the taxiway when taxiing.

[dureiken]

On 11/19/2022 at 10:05 PM, Supmua said:

Right CTRL-Pause.  I think these represent GPU FT not 100% since there're 3 of em.

Hi

is that new in 2.8 ? I'm still in 2.7 and right ctrl + pause only show me with classical format, no graph

thanks

[speed-of-heat]

12 minutes ago, dureiken said:

Hi

is that new in 2.8 ? I'm still in 2.7 and right ctrl + pause only show me with classical format, no graph

thanks

the graph is only in 2.8

[dureiken]

12 minutes ago, speed-of-heat said:

the graph is only in 2.8

ok that answered my question but dont want to go 2.8 for loosing 20% fps

[dureiken]

Ok so I made the update ...

Just HIGH settings for 2.7 and 2.8.

I also deleted fxo and metashaders after patch and here are my results with @speed-of-heat track 2.8 with openXR :

as some others people, around 10% of loss in term of FPS, about 1.5ms of GPU time

Made all tests twice to be sure.

edit : and I am under WIN11 but I made the little .bat to remove perf logs

What are your final graphics settings with 2.8 ? no more shadows ? thanks

Edited November 24, 2022 by dureiken

[speed-of-heat]

Yep same as normal sans terrain shadows.

I had some success with earlier drivers:

but others have been unable to replicate it.

I think it might because I have been fiddling with things in profile inspector:

let me know how it goes.

 

 

Edited November 24, 2022 by speed-of-heat

[dureiken]

@speed-of-heatwill try tomorrow with different drivers

could you screen me your DCS VR graph settings ?

to compare same things

 

Thanks

[speed-of-heat]

? Settings? I use open composite for recording my vr performance?

[edmuss]

32 minutes ago, speed-of-heat said:

but others have been unable to replicate it.

I haven't had a chance to clean out with DDU and retest yet, been struck down with flu for the last couple three days so not even booted the computer for anything meaningful.

Will hopefully be able to corroborate in the very near future

[dureiken]

1 hour ago, speed-of-heat said:

? Settings? I use open composite for recording my vr performance?

Dcs settings

[speed-of-heat]

1 hour ago, edmuss said:

I haven't had a chance to clean out with DDU and retest yet, been struck down with flu for the last couple three days so not even booted the computer for anything meaningful.

Will hopefully be able to corroborate in the very near future

christ don't worry about that m8, just get well 

1 hour ago, dureiken said:

Dcs settings

pretty much as per my 3090 settings here  clouds on standard, water on medium , terrain shadows off are the variations

Edited November 24, 2022 by speed-of-heat

[dureiken]

I made a new test with terrain shadows, HIGH settings and OXR TK with no FSR or others.

I don't have the same test with 2.7 but we can see that shadow impact is HUGE

Edited November 25, 2022 by dureiken

[lefuneste01]

15 hours ago, dureiken said:

Ok so I made the update ...

Just HIGH settings for 2.7 and 2.8.

I also deleted fxo and metashaders after patch and here are my results with @speed-of-heat track 2.8 with openXR :

as some others people, around 10% of loss in term of FPS, about 1.5ms of GPU time

Made all tests twice to be sure.

edit : and I am under WIN11 but I made the little .bat to remove perf logs

What are your final graphics settings with 2.8 ? no more shadows ? thanks

 

Did you compare OpenXR fps with SteamVR fps ? I had lower fps with OpenXR...

[dureiken]

22 minutes ago, lefuneste01 said:

Did you compare OpenXR fps with SteamVR fps ? I had lower fps with OpenXR...

No i didn't, because finally I will use OXR for others options like FFR or CAS

 

you still fly in SVR ?

[Talisman_VR]

On 11/19/2022 at 1:31 PM, Supmua said:

I think the fps drop depends on which performance bracket you were originally on.  For people using motion smoothing or fps lock, if you already have good fps cushion, 2ms of GPU frametime drop will not affect the overall fps as fps lock happens.  But if you were right at the edge say 46-47 fps, a drop into high 30s or low 40s can hurt, and the same goes for people who were in the 30s before (for 90Hz headsets).  For the people who play mostly in CPU bound scenarios (crowded MP servers), a slight increase in GPU frametime will not result in fps drop either because CPU is already taking a bigger hit.

However, if you do a direct measurement of the frametimes for both CPU and GPU, you will see a slight GPU frametime increase with the new beta.

 

Yes, and if one is right on the edge and flying helicopters at low level on popular MP servers all the time the drop to a frame rate in the 20's hurts even more.  So is not playable.

Happy landings,

Talisman

Edited November 25, 2022 by Talisman_VR

[zildac]

So, if anyone is interested I finally found the issue to my micro stutters. I was using OXRTK to lock to 45FPS, and I was doing this before my 4090 and installation of the VB beta to alleviate the 4090 stutters. This setup now causes the micro stutters on my system. If I use VB to lock to 45FPS and enable Vsync in VB, they are gone!

[dburne]

In 2.8 with my Aero flying the Hornet in Persian Gulf Map off the supercarrier - I find I get lower fps now since 2.8 flying over water with no AI or buildings around, than I do even during start up , taxi, and launch off the supercarrier. This is just backwards compared to how it was prior to 2.8 for me. I always had lower fps during the carrier startup and launch sequence versus after takeoff flying over only the water. Very strange. And yes I have done a Repair(long) as well as deleting fxo and metashaders2 files.

I am around 50 fps during startup and launch, and low to mid 40's flying over just water. Once I get up to around 20k ft it goes back up to around 50's to low 50's. Again all this over water.

Now I was sidelined for about 7 weeks due to spinal surgery, resumed flying a couple of weeks ago.

 

Edited November 30, 2022 by dburne

[=37.Sqn= Mjugen]

@zildach

Hello, what is VB beta ?

Thanks!

[zildac]

36 minutes ago, =37.Sqn= Mjugen said:

@zildach

Hello, what is VB beta ?

Thanks!

Varjo Base

[Supmua]

5 hours ago, dburne said:

In 2.8 with my Aero flying the Hornet in Persian Gulf Map off the supercarrier - I find I get lower fps now since 2.8 flying over water with no AI or buildings around, than I do even during start up , taxi, and launch off the supercarrier. This is just backwards compared to how it was prior to 2.8 for me. I always had lower fps during the carrier startup and launch sequence versus after takeoff flying over only the water. Very strange. And yes I have done a Repair(long) as well as deleting fxo and metashaders2 files.

I am around 50 fps during startup and launch, and low to mid 40's flying over just water. Once I get up to around 20k ft it goes back up to around 50's to low 50's. Again all this over water.

Now I was sidelined for about 7 weeks due to spinal surgery, resumed flying a couple of weeks ago.

 

 

GPU FT increases a bit with the 2.8 beta, around 1.5-2ms depending on complexity of your graphic settings or a particular mission.  You can either reduce resolution or some graphic settings to regain the performance.  Alternatively, adding an rtx 4090 will drop your GPU FT by 5-9ms.

[dburne]

31 minutes ago, Supmua said:

GPU FT increases a bit with the 2.8 beta, around 1.5-2ms depending on complexity of your graphic settings or a particular mission.  You can either reduce resolution or some graphic settings to regain the performance.  Alternatively, adding an rtx 4090 will drop your GPU FT by 5-9ms.

I actually tried something this morning that amazed me. I turned MSAA off in DCS. I enabled AA in Nvidia Control Panel and set it to "override the application". I improved my frame time by about 5ms just making this change, and it looks fantastic. 

As far as 4090 - naw going to hold off for now. Will probably do a new build around this time next year so will just wait till then. Not sure I would benefit that much with me still running a 9900k.