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  1. Hi, Just getting back into DCS. I have upgraded my pc.. nothing crazy but better than it was and wondering what the best graphics settings will be based on my specs: Ryzen 5 5600G Geforce RTX 2060 32GB Ram Monitor with 165hz M.2 NVME SSD I went into a game on high settings with DLSS enabled on balanced and was getting 100+ fps in caucasus but experienced weird freezes every 5 seconds or so.. I turned off DLSS and enabled MSAA and my fps was between 65-85. I fly the viper mainly and own Syria as well. Current graphic settings Thank you, as half the battle with DCS is getting it setup right.
  2. Jonay

    Thank you

    Just wanted to say thanks to team ED for delivering one of the best updates of the year with the introduction of DLAA/DLSS etc. I flew in VR online last night, something I rarely do in multiplayer due to the frame rate issues, and when i do i normally downtune the graphics and everything else to make it playable without stutters and freezes. Last night I forgot to do this adjustment, and it didnt care. The DLAA settings allowed smooth gameplay whilst maintaining visual fidelity, something I had to chose between before. Now it appears I don't! The new shadows are just superb, give a real depth to the environment which wasn't there before, and at times it was that good I could have said it was real. Some croppped VR screenshots. By far not the best visual quality you'll see, but for my 2080S to cope with a G2 at this grx setttings I am happy. Still going to get a 4080Ti though
  3. My game Stuttering every 20ish seconds, and when launching missiles and explodes, in 2.8 it never happened like this. I have i7-10700 ,32GB RAM,NVIDIA 3070 8GVRAM, game on SSD. Loving DCS hope this can be heal soon. @Flappie Thank you and Hi Flappie, saw you been tracking some similar issues, hope this won't bother you. Performance monitor like: Screenshot\log\track attached. HEAVY STUTTER.trk dcs.log dcs_frame.log The performance had a big issue at the end of the Trk. If the AI play their things correctly. I got shot down by the end and all the explosions and cracking~ I can see dozens of peaks on the FPS monitor window, even when I'm Over G blacked out.
  4. Hey, Im having a little trouble with the Sinai map, mostly around cities. With my usual settings (Image 1), I get 22fps in the middle of Cairo, with the Ka-50 III "Takeoff from helipad" mission. Turning down the settings significantly (Image 2), and loading the mission back up yields no change in performance. Nothing running except for DCS and OpenTrack, plus task manager CPU load wasnt super high, but GPU was. DCS was using a little under 10Gb of RAM, out of 32. Specs are: Ryzen 5 2600, Radeon RX 570 8Gb, 32Gb DDR4 3600Mhz RAM. Deleted FXO and Metashaders2 and renamed export.lua to export.lua.old, as there was some wierd socket stuff happening there from the DCS UFC app. Only saw a 2-3Fps improvement, but may have been a coincidence. Any ideas why Im not seeing any performance change, and what I could do to improve things?
  5. Hi, I posted a week ago in the forum and on facebook. I did get "HUH?". This forum would be a better spot. I notice a spike in the Stat for simulation. even if only flying, there is a spike in "Simulation" Trying to track down the reason. I will add a video this weekend.
  6. Hi all, What computer settings can I adjust to get the best out of the Multi-threaded version of DCS? I'm interested in things like how to allocate cores to DCS and how many for best effect, rather than just making adjustments in DCS video options. Currently running: Ryzen 9 5950X 16 core, 32 thread processor Asus Crosshair VIII Dark Hero 32Gb Viper RAM Radeon RX6700XT 4k screen w. TrackIR Thanks in advance! Goggz
  7. In this update, if we turn off the governor, the RPMs go high. That is right, so we move the throttle down to maintain the green arc. Once we have those RPM stabilized. Without touching the throttle, if we raise the collective, RPMs should go down (without governor) but they rise!!! totally the opposite. Is that something is happening to you? Here there is a video in spanish of a Friend that tested today and he is very frustrated because he loves the UH1H so much, and see this wrong is bad for all of us that expect something near perfection with the time the Huey has already among us. Hope if there is a bug here, can be solved soon. Thanks!
  8. It needs another rework. For the points marked as "level flight impossible", I am unsure if it is realistic or not, it is very possible the real aircraft produced enough power that full forward cyclic could not maintain level flight. However data for flight over the Vne of 125knots, let alone over 50PSI is hard to come by, and usually for the UH-1H with the old blades. Overall the huey has more available power, however at low speeds the performance discrepancy is not good. You go from requiring far too much power to requiring far too little power. However, the engine profile doesn't seem to take altitude into account. As for the engine profile itself, it is still underpowered at high power settings. The new profile produces 50PSI (1158shp) at 101% N1 The real huey produces 50PSI (1158shp) at 96-98% N1 However the EGT profile has improved significantly. The hover performance is not great, however. It requires too much power at every weight. Here is a more advanced profiling of the hover performance. The new WIP fuel consumption is far better than it was, but it's still using too much fuel at higher power settings, however it is reaching what could be considered "close enough", but could still use another tweak. The rate of climb is messed up too.
  9. As in the title, flipping between F10 and F1 seems to have a % chance of starting long-lasting stutters and screen-tearing in VR. Usually happens after the 5th or 6th time looking at the map while on a mission. This is actually so bad that it immediately stops my gameplay, I cannot continue with it. See attached video. This bug never appeared before multithreading was introduced. https://cdn.discordapp.com/attachments/865742930064965662/1100018920297070692/20230424_200758.mp4 Oculus Quest 2 3070ti M.2 SSD for DCS 32GB memory X570 Gaming+ Ryzen 7 5800X3D
  10. I have done several performance tests of my newest hardware and compared them with each other. I have used DCS World 2.8.3.38090 Open Beta with Single Thread ST and Multiple Threads MT with an Instant Mission: AH-64D, map "Marianas" - Battle for Saipan: Dawn Invasion" After starting the mission, I have pressed OK, then [Right-STRG + Break/Pause] for two times (for displaying the frame rate) and then I have pressed the space bar. Directly after that I have checked the frame rate. I know that my graphic settings are very hard.....: null All CPUs as well as GPUs are slightly overclocked, except the CPU Intel I5-13500. Here are the results, including the fps / framerates in DCS World with ST and MT: Here as a table: 4K performance comparison between four of my computers Type Description CPU GPU RAM DCS World Battle for Saipan – Dawn Invasion Time Spy Time Spy Extreme Port Royal ST MT Total Graphics Score CPU Score PC Self build Intel i7-12700KF (12 Cores, 25MB Cache) RTX 4090 24GB GDDR6X 64 DDR5-6000 84 98 („GPU-Bound“) 31977 37570 17394 16227 27128 PC Self build Intel i5-13500 (14 Cores, 24 MB Cache) RTX 3080 LHR 10GB GDDR6 32 DDR5-4800 48 58 („GPU-Bound“) 17325 17624 15810 8406 11529 PC Self build Intel i7-2600k @ 4.5 Ghz (4 Cores, 8MB Cache) RTX 2080 Ti 11GB GDDR6 16 DDR3-1600 21 38 (fast changes between „CPU-“ and „GPU-bound“) 9996 14096 3775 4506 8941 Notebook Alienware 17 R5 Intel i7-8750H (6 Cores, 8MB Cache, up to 3.9GHz with Turbo Boost) GTX 1070 OC 8GB GDDR5 32 DDR4-2666 6 7 („GPU-Bound“) 4404 4459 4118 1815 1030
  11. Ciao Ragazzi volevo discutere con voi delle performance di DCS in MT Personalmente la cosa è andata decisamente quasi oltre le mie aspettative. Io mio sistema è un po’ vecchio to ma penso ancora performante. i9 9900K 3.2GHz con 64GB di Ram DDR4 a 3600 MHz e una GeForce 3080Ti founder Edition. Come visore ho un RiftS. Le mie impostazioni sono praticamente tutto al max tranne le texture generali a medio. E PD 1.6 che teoricamente sarebbe una risoluzione di circa 2000 per 2300. Considerando che il visore lavora ad 80Hz e avendo di sua natura un sync “nativo” si viaggia per valori sottomultipli di 80 FPS e io nello specifico ho un granitico 40FPS!!! Che tutto sommato è un bel viaggiare in VR. Probabilmente con un Reverb G2 usando un PD 1.0 (usando quindi il nativo 2160 per 2160 e avendo un refresh rate di 90Hz) probabilmente riuscirei a ottenere a 45 FPS. Qualsi sono le vostre performance in VR con il MT?
  12. Please add LODs for the 3D model to help improve performance on multiplayer servers. Fewer tris is important but also consider reducing object count in the LODs as DCS considers these when calculating lighting and shadows. This change would benefit all of the multiplayer community.
  13. ** UPDATED TO WORK WITH NEWEST DCS OPEN BETA (WITH MULTI-THREADING) ** - Better performance with hardly any shadow quality loss - Works perfect with both screens/monitors and VR - No slower loading of missions of any kind - Made for DCS 2.8 but also works with DCS 2.9 (both MT an ST, Open Beta or Stable) - Not IC compliant for Multiplayer (only with servers which allow mods!) Shadows Reduced Impact (v2.11) download: https://www.digitalcombatsimulator.com/en/files/3329503/ ______ NOTES AND DESCRIPTION __________________________________ This is a modification that alters values of shadow cascade(s) for better performance. In practice, what happens when using this mod is the terrain shadows (outside-cockpit) being drawn as far as before, but with overall performance improved with quite small visual difference trade-off. The other benefit is that, at the same time, the inside-cockpit shadows maintain high quality in all settings (4096x4096 pixel shadows, though even that can be changed if really desired). ______ INSTALLATION ______________________________________________ This mod replaces one file found in the game installation folder (same paths and structure as you see in the mod). A mod manager (such as OvGME) is recommended, because it's the quickest way to install and uninstall mods in the game. If instead you prefer to install this mod manually, there are some very simple instructions in the "READ_ME" provided with the downloaded file. After installing this mod, and for the game system options/settings to use for shadows, I suggest to put them just like in the image I attach with this mod. It's merely a suggestion, feel free to use those shadow settings as you see fit. Please remember that if updating or repairing DCS, then the SHADOWS.LUA file will be reset, and you'll need to reinstall this mod again to use it. ______ EDITING THE MOD __________________________________________ If you need to further improve performance (but at cost of shadowmap quality), you can edit the SHADOWS.LUA file with any text editor and change the size value of shadowmap. I left some notes about this subject in the "READ_ME" file. Feel free to experiment - remember to always backup your files! ______ CREDITS AND THANKS _____________________________________ - To KEGETYS for the original mod this was based on. - To the people at E.D., as there are original files modified for the purpose of this mod. ______ CHANGELOG ________________________________________________ v2.11 -- minor corrections in cascade(s) v2.0 -- changes for compatibility with DCS 2.8 OB featuring MultiThreading v1.0 -- initial release based on older Kegetys mod
  14. To put the TLDR first, our huey is underperforming by 3400lbs while being provided a lower available power than the real thing, and made slower than it's actually supposed to be at low altitude (which is where it normally operates) So what are my sources? Before that, lets start with a very simple summary of HOW WRONG the module's performance actually is. null Now, I won't act like that's the whole story with all the context, because it's definitely not. There are things like the transmission limit to take into account. But those sources, lets see them. Here are the 3 main sources, there are several other minor sources as well, however the majority of the data comes from these 3 documents. null So allow me to clarify something, our huey is one with a 1990s refit, it is the one with composite blades. You may have noticed, one of those sources explicitly mentions the composite blades in the title. That source is a performance profiling of our exact model of huey. Refits and all. Now, there's something else to talk about, the huey's operations manual. You might be familiar with this chart. This chart is useless. This chart doesn't tell us where the transmission limit is, it doesn't tell us how much engine power is being used to generate those speeds, it doesn't tell us ANYTHING. That chart is a significant misrepresentation of the huey's performance capabilities, because all that chart shows is a paper limit on the huey's speed. Vne, Velocity, never exceed. A scary term, used to define a speed you are to not exceed for assorted reasons. For the huey, the Vne is in place to keep the pilots from accelerating into retreating blade stall, nothing more. It's a paper limit to keep the pilots safe, it tells us NOTHING about how the aircraft performs. However, if you look at the bottom of that chart, "Data basis AEFA Project No. 84-33" Go back and look at top of the source that mentions the composite blades, that is AEFA Project No. 84-33. The data from that document was used to generate that chart in the manual. So before we go farther, how do we corroborate all our sources to make sure they're on the same page and providing us valid information. Cross checking. Take one set of data, and see if the patterns within it match the patterns in another set of data. We can do that. Here is the overall performance of a huey with the standard blades at 7,500lbs, derived from the data within the UH-1H flight profile performance handbook. Pay attention to the density altitude of 7500ft, you see where the yellow and red (transmission limit and power limit) lines intersect, that is where the engine can no longer provide enough power to max out the transmission. Now here is the hover performance chart from the composite blade document. Look at the rightmost line. "2ft IGE, standard day". You might have already noticed it. Incase you didn't. So our documents are in agreement, what do we do with this information? We start comparing it to the performance of our huey in DCS. Lets start with a more complete performance profiling of the real huey with the standard blades, once again, this data is derived from the UH-1H flight profile performance handbook. This data is for a huey with non composite blades. So there are multiple plots here, let me walk you through them. The first one that likely sticks out is the blue line since it's away from all the others, that is the Vne. The fact that it is placed lower than all the other data reminds us of the chart in the manual. I said that chart was useless, because as you can see by this graph, every single other plot of data performs significantly over what the Vne would have you believe. The next two that likely stick out are the red and teal lines. These are the performance of the DCS huey plotted onto the same graph, the red line abides by the incorrect EGT limit placed upon the module, the teal line ignores said limit and properly maxes out the transmission where it can. Next would be the green and yellow lines, the green line shows the maximum power the engine can normally push, regardless of any other factor, at sea level that would be 1340shp. The yellow line shows the maximum CONTINUOUS power the engine can push. This means the engine can run at this power setting indefinitely without much issue. And finally, the orange line, this line shows the safe limit of the transmission, specifically, 1158shp, or 50psi on the torque indicator. This is the huey's military thrust it can use this power for 30 minutes. This is not the LIMIT of the aircraft's performance, the transmission CAN PUSH HARDER, it just does so at the risk of being damaged. Yes, this means that, per this data, the huey should be able to reach 141knots in level flight. Something you'll notice, the teal line, our huey's performance, can't even reach the transmission limit at sea level. While, conversely, our huey's performance actually PASSES the real huey's maximum possible performance at higher altitudes. So, from this alone, you can see that the module's performance accuracy is not great. But that's not the whole story, that's just for the standard huey, and we haven't even gotten into engine performance per speed yet. We'll do that now. Here is a chart from the composite blade document, it shows the level flight performance in speed compared to the shaft horsepower generated by the engine to achieve said speed at a gross weight of 9500lbs at sea level in 15C temperature air, ISA conditions. On it, you will see a pink data plot. That is our huey measured by the same metric. 9500lbs, Sea level, 15C air temperature, ISA conditions. You'll notice that our huey isn't even performing as well as the huey with the standard blades, let alone the one with the composite blades. But first, how did I get the horsepwer data from the DCS huey, we don't have access to that data. Except we do. We are given the torquemeter, which when combined with the rotor RPM, we can derive the current SHP put out by the engine. As per our previously unreferenced source "Helicopter drive system load analysis". Pages 43-44 detail a formula to do exactly that, derive shaft horsepower from our torquemeter reading, and rotor RPM. Here is that formula. SHP=3.88*((10^-3*Rotor RPM)*((17.76*Torquemeter Torque)+33.33)) Now, you'll notice that graph shows the composite blades as being measured with the rotor at 314rpm, that's ok the difference in the result isn't exceptional, however here is a table showing the same data and including 324rpm on the composite blades. So, 639shp to push the helicopter to 100knots at sea level at 15C at a gross weight of 9500lbs. That would be 26.745psi on the torque indicator in the cockpit. As you can see by the pink line on the graph, however, we didn't even get close. We hit 36, possibly 37psi on the torque indicator at those parameters. Level flight, 9500lbs, sea level, 15C, 100knots. 36psi at 324rotor rpm, as per the formula, is about 845shp, over 200shp too high. Now, we can use this formula to find something dire. Lets make the huey as light as we can and see how it performs. 6100lbs, all it has is about 9 minutes of fuel Sea level 15C 100knots level flight about 30.5psi in those parameters. 722.8shp at 100knots. The real huey pulls 639shp in those parameters at 9500lbs. Our huey, at 6100lbs, is performing WORSE than the real huey at 9500lbs. Our huey is underperforming by over 3400lbs at low altitude. That is unacceptable. Interestingly, these high torque values also explain why we need an unrealistic amount of left pedal, which when combined with the incorrectly modeled tail rotor, brings about some interesting comparisons. So, now that we have the well documented performance profile from the standard blade huey, honestly, we could just use that one for our huey and it would be fine, the overall speed differences shouldn't be drastic, it'd be far more accurate than what we have now. As for why our huey overperforms so much at high altitude, I don't know. All my efforts were aimed at understanding its performance at low altitude as that's generally where players utilize the aircraft. I suspect it may be a combination of the engine not losing enough power at altitude and rotor mach drag not being modeled. However, for now, I believe this should be sufficient to warrant the developers looking at it. Please. Properly implemented, our torque indicator should actually max out at around 58.15psi while the N1% (gas producer) gauge reads 100% As it stands, we are using too much power, to generate too little speed, at too high of an EGT, causing us to have even less power. We are underperforming by over 3400lbs at sea level, it needs to change.
  15. This issue has been reported by @NineLine but it was handled inside a report for a different issue which has now been resolved and will likely be closed in the future. I'm creating this thread to have a place to track it's progress through different Open Beta updates until it is resolved. The MiG-29 variants in DCS do not have lighter LODs. Under certain conditions the full detail model will still render at a range of more than 75km. The evidence for this issue is the .lods file for each variant and the absence of relevant .edm files in the shapes folder. This issue is still present in DCS Open Beta 2.8.2.35632
  16. The 3d model of the Mirage F1CE is very detailed and beautiful. But for multiplayer servers it can be quite heavy when there are multiple Mirage F1s close by because, at the moment, DCS multiplayer is very hard on CPUs when dealing with high object counts & shadows enabled. The F1CE LOD transitions at 50m and 100m still use the LOD0 model. Are the Mirage-F101/02 files going to be replaced with lighter models when there is time?
  17. The MB-339 has a beautiful 3D model but it would be helpful for performance on multiplayer servers if there were some simpler LODs added. Multiplayer in DCS is currently very hard on CPUs, especially with shadows enabled, so reducing load where possible will help all players.
  18. The MiG-21 currently only uses a LOD0 model. It has a .lods file describing transitions but they all reference the LOD0 model and the LOD0 model has no embedded transform nodes. While the model is not the heaviest in DCS, in a multiplayer environment near a busy airfield, a few MiG-21s can add up to a lot of objects and triangles very quickly, putting an unnecessary load on the player's CPU & GPU, particularly with shadows enabled. Also, due to how the camera seems to work in DCS, zooming in can cause the 3D model to begin rendering at longer distances. I did a search in this forum for the term "lod" and saw references to different LOD levels in the past, so possibly they did exist once and have been omitted along the way. Attached are two in-game screenshots showing 10 MiG-21s taking off at Senaki airbase, at close range and 6km away, with similar object counts in both scenes. I hope you can find the time to add the lower detail LODs as it would be a great help to the multiplayer community, especially the Cold War servers.
  19. I started this topic to track and discuss my challenges with getting the best performance out of my system. I run DCS in windowed mode and run OBS on the side. My setup Windows 10 - latest version RTX 4090, no overclocking X570 Aorus Master Ryzen 7 5800x3D, no overclocking 64GB RAM Varjo Aero Reverb G2 v1.0. Mixed Reality: best quality, 90Hz. SSD for DCS and Windows, separated Configuration Rebar enabled XMP Memory Profile Hyperthreading OFF -> update 2023-07-24 testing at the moment DCS Latest OB version 32GB Pagefile Game mode OFF Game Bar OFF Windows registry Holographic PreallocateVirtualMonitors set to 0 Windows Holographic Shell Stopped ("Go to Computer Management → System Tools → Performance → Data Collector Sets → Event Trace Sessions. In this list, find HolographicShell, right click, and choose ‘Stop’.) Windows Power Management Stopped Windows Graphics performance for DCS set to High Performance. Variable refresh rate ON HAGS OFF Nvidia Control Panel: see screenshot OBS: No render lag and no encoder lag. See screenshot for settings. Update 24-7-2024 configured to use the GPU's NVENC HEVC encoder. DCS: see screenshot Process Lasso, currently no CPU affinity set. DCS and OBS have both High priority. Edit 5-1-2023: ProBalance and Performance Mode enabled Edit 2023-07-24: Not using Process Lasso at the moment. Will test some more Open-XR Toolkit latest version: Reprojection OFF, Shaking reduction 30%. Upscaling OFF, Foveated rendering OFF, No Framerate throttling OpenXR Developer Tools latest version: Motion Reprojection: OFF Edit 7-1-2023: 3dMigoto for sharpening OFF. DCS No shader mods installed Unneccesary Windows processes killed Drivers up to date TACView on client-side disabled Nvidia latest drivers, Geforce experience disabled Update 2023-07-24: QVFR - Quad Views Foveated Rendering by @mbucchia Highly recommended! https://github.com/mbucchia/Quad-Views-Foveated/wiki Edit 01-12-2022 Changed: Disabled 3dMigoto Enabled CAS 30% sharpening inside OpenXR Update 2023-07-24 No sharpening inside Open XR Toolki Items tried with no visible advantage: Frame limiter in NVCP and OpenXR-Toolkit - Removes Judder but gives terrible ghosting VSync Adjusting DCS Desktop window size Game Mode ON 60Hz in the headset (eyes can't take it) Items still to try: Undervolting the 4090 Get a 3rd SSD and have OBS record to this SSD. -> Done OpenXR - FSR 80%: Tried, but gives degraded visuals. Clouds Ultra: keep them on for now. Nvidia Control Panel: MFAA 2X or 4X (extra visuals at no extra performance when MSAA is on?) NvidiaProfileInspector SGSSAA - Sparse Grid Supersampling 4X or 2x Processor scheduling changing to Background Services Edit 5-1-2023 Changed: DCS Shadow High, Terrain Object Shadows Default (as per advice https://forum.dcs.world/topic/313901-my-4090-vr-performance-optimization/?do=findComment&comment=5118986. Edit 7-1-2023: Tried it but did not notice difference, so reverted back. OpenXR-Toolkit: Disabled CAS Sharpening (Don't need it). OpenXR-Toolkit: Switched Motion Reprojection to automatic. (sometimes my FPS drop too low and then I would like for Reprojection to kick in). Edit 7-1-2023: Edmuss told me this does not work for DCS. So keep Reprojection OFF.
  20. I’ve been having stutters basically since switching to VR. Sometimes it would feel almost good, sometimes not. After fiddling around with settings I’ve come up with a setup that would give me consistent 11-12 ms per frame both GPU and CPU time which seemed like a sweet spot for me. I changed G2 to 60 Hz (flickering doesn’t seem to affect me much). The only remaining problem was dropped frames. The issue has become more pronounced recently so I decided to dig internet a bit more and found 3 solutions which completely eliminated dropped frames and keep perf overlay of OXR green as dollar. The first 2 seem to be the most useful. Give them a try and see if it helps your problems if you have any. I’m sure the things here were already discussed on the forum but I decided to share what helped me make my game playable again. I run OXR without any shaders or toolkit with 10 gb 3080/12700kf combo on Win 11 1. Go to computer management - performance - data collectors set - event trace sessions. Find Holographic shell and stop it. If it helps, do it every time you start VR. I have no idea what it is but apparently there's some sort of conflict between WMR and this service after 22H2 update which causes notable stutters. In my case I was sitting at frame times consistently below 12 but performance overlay of openxr was constantly changing between green and red (lost frames). Same with SVR (purple frames). As soon as I stop it it turns green and stays green. 2. Go to windows search, type services, launch as admin. Find power, double click it, change start up type to "Disabled". Apparently, it tries to manage power of the CPU and when disabled, CPU runs at consistent (max?) power. 3. DISCLAIMER: doing point three should be safe for your system but all what you do in the registry editor is completely your responsibility. If you are WMR user, you probably noticed that when VR is enabled (WMR app is running), in display settings you have 3 extra monitors. Those are virtual desktop and are used for various apps launched inside VR (such as browsers, etc.). In WMR every such app requires a virtual desktop and to avoid a lag when opening one of those it creates 3 in advance. If you're not using VR for anything apart from gaming, you can disable those. For me it reduced CPU consumption for window manager process or whatever it's called. It may also possibly slightly reduce VRAM consumption as those desktops will not be rendered in the background (or at least that's my understanding) Go to regedit and go to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Holographic Add DWORD 32 bit PreallocateVirtualMonitors and change value to 0 Happy flying!
  21. Hi all, I'm new to the forums so please forgive any errors on my part, out of the blue I've started to have sudden and constant frame drops, game hitches, and freezes and I really don't know what to do about it. The performance issues occur in all of my modules on all of the maps in and out of multiplayer. My specs: 16 gb ram RTX 2070 graphics cardx Intel i7-9700 @3 GHz My game was running fine until it wasn't pretty much. I have a log file for a session that triggered to make an account to get help (see attached). All the best, Captin Pelley dcs.log
  22. Hi everyone, The ARA Santa Fe is current capable of achieving 29 knots in the mission editor. As the ARA Santa Fe is a Balao-class (Guppy II - North Atlantic/Northern Sail) it should have the following performance characteristics (note that wiki gives performance figures for the Balao-class as built): Diesels: Surfaced: 18 knots Submerged (snorkelling): 6 knots (though C:MO says 12 knots) Electric motors: Surfaced: 10 knots Submerged: 16 knots
  23. Hi, As mentioned on the Discord (Zed), me and other players have experienced a performance issue in VR. Wherever we spawn, except on water, under 900/1000ft AGL there is a big fps drop It is just like if there was a fictive line at 1000ft which causes new texture loading. e.g : +/- 1000ft - 1ft : very laggy (between 15 and 20 fps) +/- 1000ft : very very smooth (45 fps with motion reprojection, so, probably more) usually, with my "middle class" rig on Syria Map (which is known to be a fps eater), i've no problem for big missions with a lot of objects and scripts and big weather. but here with no cloud and alone on the map, i've experienced this each time. what i've try to fix but "no joy" : - delete dcs cache files - restart computer/dcs many times, - install last nvidia drivers for my RTX 3060 TI 8gb - decrease textures level or others params in DCS My specs (pretty low but, i repeat, on Syria all is fine even at low level): I5 9400f, 32Go DDR4,RTX 3060 Ti 8Go OC gaming TRIO, Hp Reverb G2, 1To SSD on Sata 6 Thanks for your investigation.
  24. There have been many reports of unexplained prolonged FPS drops in VR. I have provided what I hope is a consistent repro along with a GPU/perf capture later on below, but common symptoms of this issue seem to include: Happens randomly, but common triggers seem to be actions that cause temporary performance blips (that then turn into sustained FPS drops) FPS goes from something stable and normal (e.g. 30/45fps) to significantly lower and unplayable (e.g. 15-25fps) FPS drop lasts for many minutes, sometimes requiring exiting the game to recover VR-specific Alt-tabbing away from and back to DCS sometimes resolves the issue Returning to the main menu still exhibits abnormally low FPS I think those last three points are important, as they point to a software bug, not a hardware bottleneck. FPS would return to normal at the main menu, and alt-tabbing wouldn't fix the issue, if this were simply a problem with users' machines being incapable of sustaining adequate framerates. Furthermore, the issue seems to be VR-specific, pointing to a VR-specific bug as opposed to a hardware capacity issue. Here's a collection of forum posts that I believe exhibit this issue (there are more): The most consistent repro that I can find is to: Load into main menu Observe 90fps Load into Cold Start instant action on Marianas map in F/A-18C sim (this is a good starting point, since you're on a carrier, and can see the island in the distance) Observe stable 45fps Slowly turn your head to the left, until you're looking behind your left shoulder Slowly turn your head to face back forward, then right, until you're looking behind your right shoulder this time Turn your head back to face forward Observe ~14 fps Quit to main menu Observe ~25 fps This is on current stable Steam DCS (also on beta), Windows 10, a stock RTX 3080 (driver 512.95, doesn't seem to matter), stock Ryzen 5950x, HP Reverb G2, WMR 2000.21051.1282.0 (version doesn't seem to matter), OpenXR 110.2204.7007 (also reproduces on SteamVR), 100% render scale (3168x3096 pixels per eye), motion reprojection always on, and the following in-game settings: 2022-06-02 08:30:19.529 INFO APP: options.graphics = { ['messagesFontScale'] = 1; ['forestDetailsFactor'] = 0.75; ['rainDroplets'] = true; ['LensEffects'] = 0; ['box_mouse_cursor'] = true; ['anisotropy'] = 4; ['water'] = 1; ['motionBlur'] = 0; ['outputGamma'] = 2; ['aspect'] = 1.6666666666667; ['lights'] = 2; ['shadows'] = 4; ['MSAA'] = 1; ['SSAA'] = 0; ['civTraffic'] = ''; ['clutterMaxDistance'] = 0; ['cockpitGI'] = 0; ['terrainTextures'] = 'max'; ['multiMonitorSetup'] = '1camera'; ['shadowTree'] = false; ['chimneySmokeDensity'] = 0; ['fullScreen'] = false; ['forestDistanceFactor'] = 0.75; ['useDeferredShading'] = 1; ['DOF'] = 0; ['clouds'] = 1; ['sceneryDetailsFactor'] = 1; ['width'] = 1280; ['flatTerrainShadows'] = 0; ['visibRange'] = 'Ultra'; ['textures'] = 2; ['SSLR'] = 0; ['effects'] = 3; ['SSAO'] = 0; ['secondaryShadows'] = 0; ['sync'] = false; ['scaleGui'] = 1; ['preloadRadius'] = 150000; ['height'] = 768; ['heatBlr'] = 0; ['terrainMapMFD'] = { ['distance'] = { ['mapLodDistance3'] = 200000; ['mapLodDistance2'] = 100000; ['mapLodDistance0'] = 25000; ['mapLodDistance1'] = 50000; }; }; }; This behavior doesn't really make sense. I'm sure that the act of looking right on the Marianas map is exceeding the VRAM on my 3080, causing a temporary blip as stuff has to be paged out of VRAM for it, but when I look back forward, everything should get paged back in automatically (at least on DX11) and return to normal. And indeed, in the captures below, there isn't any persistent VRAM paging going on that would explain the severe drop in FPS. Similarly, when returning to the main menu, instead of getting 90fps like I was before, I'm at 25fps, and nothing strenuous is going on (I haven't grabbed a capture of this yet as it's much more difficult to get a capture of due to needing to alt-tab to start the capture, and alt-tab typically clears the issue in the main menu); I took a GPUView capture of the issue on the Marianas map (happy to provide to private support), and it clearly shows some kind of problem with how DCS is scheduling it's main thread. In summary, it appears to be sleeping too long and doing nothing. This isn't a problem that requires advanced multithreading, DX12, better VRAM management, etc... It simply appears to be an issue with DCS waiting too long to start rendering the next time. Here is a capture of a normal, stable 30 fps for me after loading into Marianas (higher settings than I mentioned previously, but still a decent 30fps): What I've gathered from this is that: In VR, DCS has a thread started from WinXrRuntime.dll that runs at 90Hz (or whatever the refresh rate of your headset is) You can see the row for this in the bottom left (labeled WinXrRuntime.dll) The blue boxes are when this thread is running on a CPU core. You can see a total of 14 of them, because this capture window covers about 160 milliseconds, so at 90hz we'd expect about 14 occurrences in a 160 millisecond time period I believe this is due to xrWaitFrame (https://www.khronos.org/registry/OpenXR/specs/1.0/man/html/xrWaitFrame.html), which must be called by the application to synchronize frame submissions with my headset. So this thread is probably calling xrWaitFrame on a loop to do that, which is why it's running at 90Hz The DCS.exe thread is running at 30Hz, every 3rd time that the WinXrRuntime.dll thread is running The WinXrRuntime.dll thread is seemed to be used to (among other things) schedule the main DCS.exe thread to run (i.e. this is how DCS ensures it synchronizes its frame submissions with your VR headset) You can see the row for this a bit above WinXrRuntime.dll, labeled as DCS.exe Similarly, the blue boxes are when this thread is running on a CPU core, which aligns with every 3rd time that WinXrRuntime.dll runs In this capture, when the DCS.exe thread is signaled to run, it executes for about 16ms This isn't fast enough to run at 90Hz As noted above, it's running at every 3rd time that the WinXrRuntime.dll thread is running I.e. this is running at 30Hz, or 30fps. Which with motion reprojection, is perfectly stable and playable This could run at 45Hz, however my GPU wouldn't be able to keep up, so it would be a bottleneck and my FPS wouldn't improve. You can tell this from the Device Context and RTX 3080/Hardware Queue 3D rows, which show that the GPU is being kept busy ~85% of the time. The GPU work scheduled to the Device Context queue also takes about 28ms to drain, so it's limited to about 30fps, and there's no point to the DCS.exe thread running more often (at least, not for scheduling GPU work) In summary, the main DCS.exe thread is running at the ideal 30Hz for how my hardware is performing, and I'm getting a reasonably smooth 30fps with motion reprojection Now, let's compare this with a capture of an abnormal, unstable ~22fps for me, on the same Marianas map, after briefly turning to the right and then looking forward in the same exact direction (i.e. should be rendering the same stuff as earlier in the 30fps capture): There are a few notable differences from the earlier capture that was stable at 30fps: The WinXrRuntime.dll thread is still running at the expected 90Hz The DCS.exe thread is running at 22.5Hz, every 4th time that the WinXrRuntime.dll thread is running (instead of every 3rd) In this capture, when the DCS.exe thread is signaled to run, it executes for about 23ms This is higher than in the good capture (23ms vs. 16ms) As noted above, it's running at every 4th time that the WinXrRuntime.dll thread is running I.e. this is running at 22.5Hz, or 22.5fps. Even with motion reprojection, this isn't very playable (it also varies a lot and isn't stable) This could run at 30Hz, but for some reason it isn't. My GPU isn't a bottleneck. The GPU work queued to the Device Context is still taking 28ms to drain, which is the same as the good capture. The GPU is also only being kept busy about 60% of the time, and there's no reason that the DCS.exe thread couldn't run more often (at least, probably not) In summary, the main DCS.exe thread could be running at 30Hz, and my GPU would be able to keep up, but for some reason it isn't, resulting in a very poor framerate My CPU also certainly isn't a bottleneck. I don't have an explanation as to why each frame of the DCS.exe thread went from 16ms to 23ms, but that's still fast enough to run at 30fps. I also have plenty of spare cores to which the DCS.exe thread could be scheduled to and run during this, so that isn't a problem either: In summary, it should be evident from these captures that DCS is more than capable of running this at a stable 30fps here, but isn't due to what appears to be a bug with the main DCS.exe thread literally deciding to do nothing and wait (lazy thread!). There is no CPU/GPU bottleneck. DCS must have some way of throttling how frequently the main DCS.exe thread runs. If it ran as frequently as it could, then my GPU wouldn't be able to keep up. This is why it only runs at 30Hz instead of 45Hz in the first capture, because even though it could run at 45Hz, the GPU would fall behind. So it must be doing something intelligent to throttle how often it runs. It's my theory that these framerate drops in VR (consistent with the symptoms mentioned here) are due to a bug with how the DCS main thread is scheduled to run, that causes it to run less frequently than it should in certain scenarios, and thus may be a relatively simple fix and a huge stability boost to anyone experiencing this issue (including myself). I'm happy to provide more info. I also have logs available, but I'll note that they look the same whether or not the issue is occurring, so I don't believe they'll do much good. I also have some experience in this field and would be happy to sign an NDA and look into the issue myself, but I'm sure ED has people better suited to fixing this than me. If only they're able to reproduce and look into the issue, I'm sure a lot of VR customers would be very grateful, as this issue is extremely disruptive, to the point of making the game unplayable in VR without excessive hardware purchases (like a 3090) or turning settings down to very low levels and avoiding maps like Marianas or even MP entirely.
  25. Greetings All! I recently received my Varjo Aero and I am loving it so far! I had some issues when I first set it up (the 4 'screens' appearing in the desktop view - essentially, the Aero 'doubling' the viewable area). What I saw in-game was some ghosting/model mismatching - for example, in a test run w/ the Huey my external view showed the aircraft sitting in the ground so that the bottom was in the taxiway. I was able to work those issues out as outlined in part in this post: Part of the fix was using the string --force_steam_VR in the properties of my DCS shortcut. That fixed the ghosting/mismatching issue...but my performance dropped significantly compared to previous when, I'm assuming, the Aero was running on the Varjo software. TBH, it's kind of disappointing after the $$ I spent on the headset, which I will use almost exclusively for DCS. So, all that being said, I'm wondering if there is a way to use the Varjo software w/o the 4-camera issue that anyone has found? Alternately, I'm up for any recommended VR settings - or a link to a recent-ish post - that would assist in getting smooth VR performance without sacrificing too much in the visual quality arena. Or, perhaps I'm just asking too much at this point - I know, first world problems... And, my system specs are pretty up there - again, built a new rig primarily for DCS. (I hate to admit how much I've sunk into hardware for this game...) So, I'm *hoping* to get some butter-smooth performance. I'm sure there is some combination of settings out there - I have tweaked many times with my previous HP Reverb G2 - but at this point I'm kind of lost in all the myriad of settings. [And yah, I'm old enough to remember when the only graphics settings you had were screen resolution, and even then you could only choose from 3 or 4, if you were lucky.] Intel i7-12700K - 3.6 Ghz - RTX 3090 - 32 GB DDR5 RAM - 1 TB SSD - Win 10 Thanks! Appreciate any and all thoughts, ideas, and input!
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