Pand Posted January 28, 2022 Posted January 28, 2022 Ok @DCS - I think I found something wrong--- not sure what it is or how too fix it, but it is likely what is making my DCS experience suck. CPU: i9-12900K GPU: GeForce 2070 Headset: Odyssey+ WMR - Motion reprojection: ON or OFF is irrelevant - results are the same either way. In normal operation (as all of us do), the DCS window will be in focus while in VR. The game mostly runs a little janky and FPSVR reports it's using about 80% of the GPU being used. If I then Alt-TAB out of DCS, and DCS is out of focus, I can still look around in the VR headset. DCS does not take inputs so you can't actually maneuver the aircraft; however, FPSVR reports around 95% GPU usage and looking around and looking at terrain, or things exploding is SUPER smooth. I mean the best I've ever seen smooth in VR. If I Alt-TAB back into DCS, it goes back to about 80% GPU utilization, and gets janky again. Just sitting on the tarmac, there is roughly a 10 FPS difference when the GPU uses around 95% vs 80%. Any thoughts on what is going on here and how to fix? Images attached. 2
despinoza Posted January 29, 2022 Posted January 29, 2022 Same happened to me. Ryzen 3700x - 2080ti - 16GB 3200 - 500G SSD - OCULUS RIFT S
noxyd Posted January 31, 2022 Posted January 31, 2022 I haven’t tried the Alt Tab trick but my GPU usage in game is also low (70-80%) while my CPU usage is low which drives me nuts (12600K, 3080Ti). if anyone has a fix for this I’ll take it thanks ! 1 Aorus Z690i, 13600K @5.5ghz, RTX4090, 32GB DDR4 3600 C16, SSD WD SN850 black, HP Reverb G2, Virpil WarBRD + MongoosT50 CM2 grip
Pand Posted February 2, 2022 Author Posted February 2, 2022 Is this the correct place to report this? How would I engage someone from ED to investigate/troubleshoot?
despinoza Posted February 3, 2022 Posted February 3, 2022 I would love to see if ED can replicate this abnormal behavior 1 Ryzen 3700x - 2080ti - 16GB 3200 - 500G SSD - OCULUS RIFT S
edmuss Posted February 3, 2022 Posted February 3, 2022 Are you running at 90 or 60 refresh rate? Top image is showing 17.3ms and 42 fps, but 17.3ms equals 58fps not 42; assuming that you have smoothing engaged the fps counter can't accurately record the fps - I'm going to surmise that the fps was jumping about the 45fps locked down by the half refresh rate. When smoothing is engaged the GPU usage is reported as reduced, I'm not sure if it actually is or not though. I don't know if smoothing is disengaged when alt tabbed but assuming that it is then that would explain the fps counter showing the correct frame rate for the frametime (20ms = 50fps) and because the GPU isn't being tied back is capable of more utilisation. The view will be smooth because it's a static image, the stutters only occur when the frames can't be generated fast enough to keep up with the refresh rate of the panels and head movement is combined. It looks like you're running 90Hz refresh rate, however with WMR unless you can consistently hold less than 20ms it will disengage the smoothing and it will be stuttery. Try running at 60Hz and you will be able to have smoothing engaged down to 30ms. Ryzen7 7800X3D / RTX3080ti / 64GB DDR5 4800 / Varjo Aero / Leap Motion / Kinect Headtracking TM 28" Warthog Deltasim Hotas / DIY Pendular Rudders / DIY Cyclic Maglock Trimmer / DIY Abris / TM TX 599 evo wheel / TM T3PA pro / DIY 7+1+Sequential Shifter / DIY Handbrake / Cobra Clubman Seat Shoehorned into a 43" x 43" cupboard.
Pand Posted February 4, 2022 Author Posted February 4, 2022 Thanks for the reply! Although I don't have the screenshots --- it happens with and without motion reprojection. You might be right about the smoothing; however, I don't have any steam SS or anti aliasing enabled. I only have pixel density at 1.3 which is barely usable. I can visibly see the smoothness difference when alt-tabbed out. Looking around in VR while alt tabbed I can noticeably tell the difference in smoothness, as well as seeing no degradation in fidelity..... give it a try, everyone I talk to says they experience similar results. I'll try the 60hz to see if it will appease the motion reprojection gods Cheers and thanks for the idea
JimEb58 Posted February 6, 2022 Posted February 6, 2022 Took about a yr hiatus from DCS, now it's completely unplayable for me with the constant stuttering. Spent the last month tweaking settings, following every "optimization guide", updating every driver on my PC, etc. I can run other VR games no problem, but DCS is no joy. I can run with settings that don't even make my hardware break a sweat, performance graph is easily in the green and still stutters. Change focus and everything is smooth and beautiful. Change focus back and pilot resumes having seizures or something. I've even systematically gone through and tested every graphic setting in DCS, nvidia, steamVR, etc and nothing seems to make a difference. At this point all I can think of is it's a bug in DCS. Not going to waste anymore time with this exercise in frustration until DCS has a bug fix or someone way smarter than me discovers a work around. AMD Ryzen 7 3700X, 32.0 GB ram, nvidia GeForce RTX 2060 SUPER, HTC Vive Wonder if the issue is Win 11. My PC auto updated months ago so I'm way past the window of reverting.
Steel Jaw Posted February 6, 2022 Posted February 6, 2022 Interesting info. The fact remains though that VR in DCSW is a huge trade off and compromise from 2d with TIR. Theres times I just want smooth gameplay and have to pancake it. 1 "You see, IronHand is my thing" My specs: W10 Pro, I5/11600K o/c to 4800 @1.32v, 64 GB 3200 XML RAM, Red Dragon 7800XT/16GB.
edmuss Posted February 6, 2022 Posted February 6, 2022 2 hours ago, JimEb58 said: Took about a yr hiatus from DCS, now it's completely unplayable for me with the constant stuttering. Spent the last month tweaking settings, following every "optimization guide", updating every driver on my PC, etc. I can run other VR games no problem, but DCS is no joy. I can run with settings that don't even make my hardware break a sweat, performance graph is easily in the green and still stutters. Change focus and everything is smooth and beautiful. Change focus back and pilot resumes having seizures or something. I've even systematically gone through and tested every graphic setting in DCS, nvidia, steamVR, etc and nothing seems to make a difference. At this point all I can think of is it's a bug in DCS. Not going to waste anymore time with this exercise in frustration until DCS has a bug fix or someone way smarter than me discovers a work around. AMD Ryzen 7 3700X, 32.0 GB ram, nvidia GeForce RTX 2060 SUPER, HTC Vive Wonder if the issue is Win 11. My PC auto updated months ago so I'm way past the window of reverting. You should be able to run DCS vr without any major issues. If the performance graph is green then you should be buttery smooth all round. I even had it smooth with the G2 on a 1070 albeit with some reduced settings, mainly resolution. Is it stuttering all of the time or only when you move your head, particularly looking out of the sides? Ryzen7 7800X3D / RTX3080ti / 64GB DDR5 4800 / Varjo Aero / Leap Motion / Kinect Headtracking TM 28" Warthog Deltasim Hotas / DIY Pendular Rudders / DIY Cyclic Maglock Trimmer / DIY Abris / TM TX 599 evo wheel / TM T3PA pro / DIY 7+1+Sequential Shifter / DIY Handbrake / Cobra Clubman Seat Shoehorned into a 43" x 43" cupboard.
Pand Posted March 3, 2022 Author Posted March 3, 2022 Is there anyone from Eagle Dynamics that can help me troubleshoot this? The game in VR runs absolutely beautiful as long as "WINDOW IS OUT OF FOCUS" --- as soon as you Alt-Tab back in so you can actually control the plane with inputs, it stutters like I'm running on 20 year old hardware. Cheers 5
average_pilot Posted March 4, 2022 Posted March 4, 2022 (edited) Same thing. I've been noticing this for some time and every time I do some googling out of frustration I get the same results with no fix or suggestion that works, and not even some sort of theory about the reason this happens. Extremely frustrating. Edited March 4, 2022 by average_pilot
average_pilot Posted March 17, 2022 Posted March 17, 2022 I was thinking about a possible cause. I wonder if, perhaps, the mirror view is messing with Window's process scheduling, which is already not that great for games to start with, and less so for VR.
obious Posted March 17, 2022 Posted March 17, 2022 (edited) @BIGNEWY are you able to give this a try and share your experiences at all? Thanks Edited March 17, 2022 by obious 1 Intel 12900k @ 5.2Ghz, RTX 4090, Samsung 1TB NVME, Thrustmaster Warthog & F-18 stick, Pendular Rudder Pedals - Quest Pro AV8B N/A UFC Build Log AV8B N/A PCBs for sale
Burt Posted April 13, 2022 Posted April 13, 2022 Sometimes it just a WMR update that makes things run like crap. I recently had to do this and it solved my issue. 1 ALIENWARE R11 - I9 10900KF @ 5.1 GHz - M.2 NVMe 2TB - RTX3090 - XFURY 64GB -3400 MHz RAM Monitor AW3420DW @ 120Hz - Virpil CM3 Throttle - TM TPR Rudder pedals - Virpil CM2 w/TM Hornet Stick Center - Monstertech Deck Mounts RealSimulator FSSB-R3 Lightning Base w/ F16SRGRH SideStick - VR user / Varjo Aero - Big Thx to mbucchia Start Date April 2020
TylerPL666 Posted April 26, 2022 Posted April 26, 2022 (edited) On 1/28/2022 at 6:55 PM, Pand said: In normal operation (as all of us do), the DCS window will be in focus while in VR. The game mostly runs a little janky and FPSVR reports it's using about 80% of the GPU being used Had same. Turn off HAGS. Should help on "better performence when DCS window out of focus". 2nd: Use DCS build fps counter. DCS do not like beeing stalked by any external FPS software. 3d. My image on Samsung Odyssey + looks much more clean in Performence/90Hz settings in WMR. 150% in OXR Devtool, Clam bias, MFAA ON, ALL other: MSAA OFF, AF OFF, FXAA OFF, Trilinear OFF... all off! NvidiaPanel: Prefair max performance, Quality: Best performance [be awere that Trilinear have tendention to auto-switch to on when swiching quality] Textures and Vis Range Medium, 1024, others on Low. Then tell me the fps. Edited April 26, 2022 by TylerPL666 HP Reverb G2, Samsung Odyssey Plus+, EVGA GeForce RTX 3080 FTW3 ULTRA GAMING 12GB GDDR6X, 32GB RAM, Intel i7-7700k 5.1GHz (OC), Hydro Series™ H100i v2 Extreme Performance Liquid CPU Cooler, Buttkicker 2 Gamer+SSA Sound Module, Virpil MangoosT-CM2 Base+Grip, Logitech X56 Throttle +Rudder, Logitech Z906 5.1, LG OLED 55'' 4K 120Hz A10-C II, AH-64D, AV88NA, F-14A/B, F-16C, F/A-18C, Ka-50, Mi-24, Mi-8, SA342, UH-1H, SuperCarrier, Persian Gulf, Nevada, Syria, Simshaker for Aviators
Delta59R Posted April 28, 2022 Posted April 28, 2022 On 2/3/2022 at 10:35 AM, edmuss said: Are you running at 90 or 60 refresh rate? Top image is showing 17.3ms and 42 fps, but 17.3ms equals 58fps not 42; assuming that you have smoothing engaged the fps counter can't accurately record the fps - I'm going to surmise that the fps was jumping about the 45fps locked down by the half refresh rate. When smoothing is engaged the GPU usage is reported as reduced, I'm not sure if it actually is or not though. I don't know if smoothing is disengaged when alt tabbed but assuming that it is then that would explain the fps counter showing the correct frame rate for the frametime (20ms = 50fps) and because the GPU isn't being tied back is capable of more utilisation. The view will be smooth because it's a static image, the stutters only occur when the frames can't be generated fast enough to keep up with the refresh rate of the panels and head movement is combined. It looks like you're running 90Hz refresh rate, however with WMR unless you can consistently hold less than 20ms it will disengage the smoothing and it will be stuttery. Try running at 60Hz and you will be able to have smoothing engaged down to 30ms. My understanding. it's taking 17.3ms to draw a frame. The 42 vs 45 could be why its not smooth (some type time/alignment/buffer glitch??). So if its 42 why doesn't it show23.8ms? Because its capped at 45fps and it doesn't need that much time to draw the frame, that's why the gpu is only at 80%. If the gpu was at 100% you would see something closer to 23.8ms bc it using every bit of the time it has to draw the frame, or if it was at 45fps/100%cpu you would see something close to 22ms. For example, if you are sitting at the home/menu screen (for me) its common to see something like this; 45 fps, 6ms, 45% gpu usage. Meshify C w Noctua Fans, MSI Carbon Z790, 13900KS, 64gb 7200 Gskill, MSI 4090, MSI 240, Sam 1tb m2, Sam 2tb m2, Seasonic 1000w, MSFF2 Stick + X56 Throttle, HP Reverb G2, Sony 83in A90J OLED
Delta59R Posted April 28, 2022 Posted April 28, 2022 On 1/30/2022 at 9:40 PM, noxyd said: I haven’t tried the Alt Tab trick but my GPU usage in game is also low (70-80%) while my CPU usage is low which drives me nuts (12600K, 3080Ti). if anyone has a fix for this I’ll take it thanks ! Thats good. Its probably because its hitting the frame cap. Same reason why usage goes down on the home/menu screen. It doesn't need 100% to reach its goal. Just like why you don't have to keep a Lambo floored to maintain 60mph.. Meshify C w Noctua Fans, MSI Carbon Z790, 13900KS, 64gb 7200 Gskill, MSI 4090, MSI 240, Sam 1tb m2, Sam 2tb m2, Seasonic 1000w, MSFF2 Stick + X56 Throttle, HP Reverb G2, Sony 83in A90J OLED
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