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I started this topic to track and discuss challenges with getting the best performance out of the system. I usually test each setting a couple of times. 27-1-2025 Nvidia 571.96 DLSS 4.0 Installed the new drivers. 25-1-2025 Adjusted GPU Overclock Increased CPU PBO Scalar and reduced some of the GPU overclock to further increase fps and frametimes. Time will tell if it also stays stable on the MP-servers. 18-1-2025 Clean W10 Complete reinstall of W10 returned another 5fps and better frametimes. Over the years the system got bloated with all sorts of traces from old hardware that I upgraded (2x GPU and CPU) and software that I tried and not fully removed. The system is snappy and clean again! I considered W11, but there are too many bad stories out there, no clear advantage for AMD and GUI modifications with taskbar etc W10 is easier. The only thing I still notice is that it seems that when I hit the FPS limit some sort of trouble in FPS and frametimes appears. When I stay a bit below 90, like 88fps, it is more stable. 27-12-2024 Current Overclock settings 64GB ----- EXPO: ON (timings default as stated on the DIMMS) 9800X3D ----- Turbo Game Mode: ON PBO: +200 Curve Optimizer: -20, FCLK Infinity Fabric: 2200 UCLK DIV1 Mode: UCLK=MEMCLK, SCALAR 10X 4090 ----- Core Voltage: +100 Core Clock: +120Mhz Memory Clock: +900Mhz, Fan: Power Limit 133%, Temp Limit 84. This GPU overclock is stable and gives me 4-5 extra FPS, even when i am CPU bound. My setup Windows 10 - latest version - Windows 11 will not happen until I will get serious latency advantages. Motherboard: ROG STRIX X870E-E Gaming WIFI Systemboard VR Headset: Varjo Aero SSD for DCS and Windows, separated DCS Settings Most are set to the max. SSS, Secondary Shadows, SSAO, SSLR are disabled; they do not bring much visually. Visibility Range Extreme. I have Visible Range set to High. Increasing this further is not bringing much visual improvement and really takes away performance. MSAA Mask Size 0.42 is my sweetspot. Testing Setup and approach My Windows has been heavily tweaked and optimized and I am currently still running the same Windows I started with 5 years ago. I upgraded my systemboard, CPU and GPU a couple of times but did not reinstall Windows. I think at certain moments in the past I even went too far with tweaking and should have dialed back and better register what I was doing. So a clean install will be somewhere in the near future because I am certain I have left quite some performance on the table. For the basic quick test of setting adjustments or hardware/software updates I start a the default A-10C mission Runway Startup on the Marianas Map. I use Marianas because this mission is quite demanding and quite stable almost from the start with AI not doing much. I let it run a couple of times for 20 seconds and track the performance with CapFrameX to calculate the average FPS, 1% and 0.2% lows of the runs. Many other missions give me 90FPS, so adjusting settings with such missions will not give me noticeable visible differences. If I want to visually see the performance I open up the the FPS overlay inside DCS. I sometimes also open up the new XRFrameTools application to visualize my frametimes. Once a setting looks pretty okay I log into our Wing's Multiplayer server, startup OBS recording and give it a spin to see how it goes. I usually get 90FPS flat in this setup, while running OBS recording. Testing log From now on I will start adding my complete testing logs to this main posting. Where relevant I will add charts to visualize the difference between certain options. Certain tests were eye-openers. It was/is a dreadful process going through all the settings and quite a few settings were insignificant in my case. Frame Times, average FPS, 1% and 0.2% Lows My main goal is to find the ones that will bring more stability (reduction of intrusive stutters) and performance (increase of FPS/frametimes). Sometimes it is like searching for a needle in a haystack. Seeing the settings that made a difference might bring quick wins to others as well. Overall the average FPS is not improving that much by all the tweaking, it is easy though to screw up your system and reduce FPS. But once the FPS are pretty decent it is hard to get substantial improvements. My biggest wins are with the 1% and 0.2% lows, reducing these give a much better overall experience than to have 1-2 more average FPS. The overall FPS can be high, but when you have a few microstutters here and there it is very annoying and for me breaks the immersion in VR. Caution Please be careful, not all what works for me might work for you. Do everything at your own risk. I had some crashes, especially with the overclocking, so always make backups and restore points. I also don't have my overclock software start automatically anymore when tweaking, because that also caused an issue once causing me to keep rebooting into a crashing configuration. null null null

Hello. This problem appeared after latest updated of MT a few days ago. A few days ago I noticed that there's no any progress in loading of my mission but after pressing alt+ctrl+del when there was an information that DCS doesn't work, at background it started to load really fast and there wasn't any problems. But the same situation was every time I wanted to load my mission. I also tried to start new mission in mission editor on Caucasus - the same story. After a few times, alt+ctrl+del didn't help.So I uninstall all mods - the same problem, then I repaired DCS with extra files - the same problem. I uninstalled DCS, installed totally once again. And it helped for a few times. The same story independently if I have mods installed or not. No Nvidia Experience or settings. New DCS installed yesterday, it worked even good so I installed mods, it worked good too. Now it doesn't work with or without mods. - i7-13700K, RTX3080, 64GB Ram, 500GB SSD only for DCS (cleaned totally after uninstalling the game and before installation). - latest drivers of everything My profile with thread about this in DCS group on FB: https://www.facebook.com/groups/193255800800445/user/100000542554941 I also add dcs.log (the latest) with mods installed. Anyway as I said, independently from mods, it doesn't load in my mission and in mission editor. I can launch dcs, I can't launch any mission. Any ideas? Maybe Norton? Is it possible to uninstall the latest update to check if it works? dcs.log

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

Please note : from DCS 2.9.8.1107 both bin and mt-bin folders contain Multithreading. Single threaded DCS is now legacy and removed from DCS. DCS Multithreading F.A.Q Users who want to test the new multithreading version of DCS can do so by following the steps described below. Multithreading contains some known issues, but we will gladly receive reports. Please make reports as full and clear as possible that are reproducible. Also, please send crash information using the automatic send-crash tool, if possible. Launching Multithreading DCS For the standalone version from our eShop DCS: You can find the new folder "bin-mt" in your DCS / DCS Open Beta main root folder where you have installed DCS. i.e. "D:\Eagle Dynamics\DCS World\". To launch the multithreading version, navigate to the "bin-mt" folder and launch DCS.exe from it. i.e. "D:\Eagle Dynamics\DCS World\bin-mt\DCS.exe". For your convenience, you may want to create a shortcut for "D:\Eagle Dynamics\DCS World\bin-mt\DCS.exe" on your desktop. Be advised that the DCS launch shortcut that is automatically created on your desktop after DCS installation will launch the DCS updater from i.e. "D:\Eagle Dynamics\DCS World\bin\DCS_updater.exe". You may have gotten used to the process where you launch DCS and it checks for available updates before launching the game. If you make a shortcut for the multithreading version (i.e. "D:\Eagle Dynamics\DCS World\bin-mt\DCS.exe") then this shortcut will launch DCS, and it will not check for updates before launching the game. For STEAM users: Use the Play MT Preview in launch options. To do so, right click on DCS World Steam Edition in Steam and select PLAY; you should see the below pop-up. What is multithreading (MT)? MT is a programming technique that allows multiple threads to exist within the context of a single process. A thread is an independent path of execution within a program, and MT allows a program to perform multiple tasks concurrently, improving its performance and responsiveness. However, MT also introduces some complexities, such as thread synchronization and resource sharing, which must be carefully managed to avoid issues such as race conditions and deadlocks. Why am I seeing no to little performance gain? There are several reasons that could account for this. One of the most common reasons for lower-than-expected performance gains is being GPU limited. Whereas MT can greatly improve CPU efficiency and resulting performance, most of the graphical rendering elements are still reliant on the graphics card. To check this, play a mission and press Right Control + Pause at the same time to display your performance Frame Per Second (FPS) and rendering information. If it indicated GPU BOUND, your graphics card is holding back the maximum possible frame rate that the CPU can provide. MT is most effective in large missions with many units. In small missions with a limited number of units, CPU calculations are not a gating performance limit. As such, you may not see much of an MT performance gain in small missions. Older CPUs will not benefit as much from MT as more modern CPUs with a greater number of cores/threads. Please be sure that you are using the current Open Beta and that you are using the DCS.exe from the Eagle Dynamics\DCS World OpenBeta\bin-mt\ folder if using the standalone version. Controls HOG PLUG is enabled. Please ensure that that HOT PLUG is disabled from OPTION / CONTROLS tab. You may not have appropriate BIOS setting for your CPU. If you have 32 or less cores, please ensure that HT/SMT is enabled. If you 33 or more cores, please disable this. If you have Vsync enabled in OPTIONS/SYSTM, uncheck the box Are there any known issues that I should be aware of? As an initial test version, yes. NS430 inoperable. Not in 2D neither 3D Sporadic stuttering in 2D and VR Ka-50: IT-23 display is colored. Supercarrier: there is no picture on LSO displays Display issues with a limited set of VR devices Dedicated server doesn't start automatically first time after update, hoster have to launch server manually by clicking on “start” button for mission or server itself in web GUI Motion Blur causes blue/black 'fog' (in single-thread only) Invisible player aircraft sometimes Cockpit tooltips AH-64D Instant action Persian Gulf - animator.dll crash If you notice other problems that you'd like to report, please visit: Multi-Threading Bug Reports (Temp) - ED Forums (dcs.world) Why is MT currently optional? As MT is a complex addition to DCS, we have made it optional for initial public testing. Once fully tested and working well, it will be enabled by default. How long will MT be in preview? It depends on public test results and feedback; we will keep you all informed as things develop. What is the maximum number of threads the game can utilize? About half of P-cores are dedicated for the graphics needs. Currently the rendering pool scales up to 16 threads on P-cores (1 core = 2 threads). The other P-cores are used by the main logic thread, sound engine threads, and the auxiliary thread pool that occupy all available space. E-cores are used only by the resources streaming pool that has no limits (1 core = 1 thread). Will VR and flatscreen have an equal performance improvement? MT is agnostic between a 2D monitor and VR. Both will see the same proportion of improvement. Note that VR is in general more demanding so you will see lower FPS than flatscreen performance given the higher rendering overhead. Will performance be improved for people currently bottlenecked by their GPU? MT may not help with performance if you have a GPU bottleneck. This is because the GPU is responsible for rendering and processing graphics, and it operates independently of the CPU. So MT may not directly improve GPU performance, but it can help to improve overall application performance by offloading non-GPU related tasks to separate CPU threads. Are there any downsides to MT if I have a CPU with few cores (Like an old quad core)? While MT can improve performance on a CPU with multiple cores, it may not provide significant benefits on a CPU with few cores. In fact, it could even lead to decreased performance in some cases. Will the dedicated server also be multithreading? Currently, the dedicated server is ST. MT dedicated server should behave exactly like ST one including performance because the game logic is still running on a single thread. If you have issues with performance or anything else, please make detailed reports for us to review. Will I be able to play on MT servers/large missions that I couldn't before? You should see improvement in larger missions, but mission designers should still consider unit count in any mission they create. Overloading a multiplayer mission with units will result in loss of performance. Will MT and Single Thread (ST) be updated separately or updated at the same time? You can update DCS in the usual way. Can MT and ST clients join the same server? Yes, MT and ST users can play on the same server. Should I enable HT / SMT in my motherboard BIOS? Currently, users with more than 32 threads should disable HT/SMT, but for everyone else we recommend enabling HT/SMT. Can I expect more bugs with MT, and can they be reported the same way or do I need to do separate reports for MT and ST? MT is a very complex addition to DCS, we have done a lot of testing but you may see issues we have missed. If you do, please report them on the forum bugs section. When reporting issues, please make it clear that you are using multithreading by either by adding “MT” to the title or in the topic itself. I have not seen any improvement what can I do? If you are not seeing any improvement in performance, please make a forum post with your dcs.log dxdiag and a track replay example in the performance issues forum section. How can I launch VR in MT? Same way you do now but using the bin-mt/ dcs.exe with the added launch parameters. ( example "C:\DCS\bin-mt\DCS.exe" --force_enable_VR ) Steam users will have a MT VR option in the launch pop up. Or try starting in 2D and enabling VR in the DCS VR tab, then restarting DCS. Experiencing a crash on first launch of MT DCS? If anyone has an early crash when starting MT DCS and sees almost empty dcs.log file with/without the stack, it would be great to get additional CPU information from such user. 1. add mt.lua to Saved Games\DCS\Config\ mt.lua 2. launch DCS 3. provide Saved Games\DCS\Logs\dcs.log attached to forum post 4. remove mt.lua

Hello. With the newest OB-update, I am no longer able to access Syria multiplayer maps due to crashing, presumably because of lack of memory. All other maps are fine, and utilizing about 50% of memory, while Syria uses around 98 until crash. Pagefile is adjusted to 32GB (32768), and I've done a repair and removed mods folder. The images named RAM Cauc/PG/Syria are made in the mission editor with clear skies, and a single A10A flying from A to B. Image "High RAM" is an attempt to fly on the "Syria Rotorheads" MP server. Same results in Grayflag. In previous OB-versions I have been no where near these values. I've set preload radius to around 80000, but I have not had any issues running it with 150000 in previous versions. null dcs.log DxDiag.txt

I have a Problem which I have been able to recreate where whenever I merge with another player specifically in an su-27 / 33 the aspect ratio changes back and forth from my native to something really small maybe like 720p (I'm playing in Full screen). I have tried to recreate it while turning hard or fallowing friendly planes and an enemy su25 but it only seems to happen in the above situation consistently. Cant recreate problem in single player with Ai su-27 or 33. I have a video of it and I will post it in this thread when it uploads to YT. I should mention that I'm playing with MT on. I also asked other F-14 players in the server (Tempest) if they have had this problem and one did say it happened to them yesterday. -Thanks for any feedback Specs -Ryzen 3600 -Rx 5700 -32GB Ram dcs.log

happened during tests trying to reproduce the bug, so before the bug occurs i turned on and off RWR and changed settings several times. Then it became blank except for A/A threats. track attacched. RWR stopped working on SAMS.trk

Was playing on the throught the inferno server on caucasus, when i in my f-16 i pulled a few g's which made my screen from only the cockpit view stretchen and zoom in until it went away about 20 seconds later. This was on the MT version and openbeta standalone. There is a video file attached of the bug. DCS.openbeta 2023-03-10 19-22-06.mp4

It seems like one or the other. Perhaps there is a thread or process contention happenning. here are symptoms: MT DCS triggers Steam FPS VR to crash. If one is open before the other, it causes the other to crash. 1) if fps vr is open, then dcs is launched fps vr crashes 2) if dcs is open (MT) and fps vr is opened dcs crashes without error log etc looks like some sort of contention for resources, that triggers reload of the vr/hmd? no error log is generated. a restart of steamvr can occur sometimes 10700k/4090/win10/ Plazma1945

No MT plus SSAA 2x at 1080p resolution, vsync on. With MT plus SSAA 2x at 1080p resolution, vsync on With MT plus no SSAA 2x at 4k resolution via DSR, vsync on. You can see that the FPS drops. So it should be with SSAA because SSAA and DSR have practically the same performance. Remembering that the DCS with MT I had a gain of approximately 10FPS in that same mission. DCS without MT, vsync off. DCS with MT, vsync off.

Hi, Just tried the multi threading for the first time. I had mixed results. framerate is good until I turn my head. no other obvious problems. I enclosed a track that shows the issue. the edges of my view are blurred. Here are some tracks: first MT in Anton-2.trk first MT in Anton-3 w-FR.trk first MT in Anton-1.trk I tried a slow repair, and cleared the fxo and metadata folders, it did not help. by the way, in regards to the many crash reports I have sent in the last week or two, the game has started fine today 4 times or more

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?

Since the latest open beta I have very much lag with the mouse in menus and mission editor. It is not constantly lagging, more like few seconds laggy and than normal for some seconds. The game itself runs without lag. I use MT in single player with F15E installed. My mouse is an Alienware 610M wireless, which runs without problems in other games and also before the last update everything worked fine.

Bug: Hello. I would just like to submit a report that the Mid Compression Bypass breaker pull keybind in the F14A Tomcat is not functional. Can I reproduce it 100%: Yes How to reproduce: Step 1: Open the fuel probe Step 2: Pull the breaker Step 3: Throttle up to mil power Step 4 : Switch to the RIO seat and do the MCB circuit tests, + check power output Result: Both of the lights will stay lit, indicating the circuit is still functioning. In addition, no thrust is returned. DCS Version: OpenBeta 2.8.6.41363 System Specs: CPU: Ryzen 9 5900X GPU: NVIDIA Geforce RTX 4080 RAM: 64GB 3600MHZ DDR4 (quad 16gb sticks) SSD: Samsung 980 Pro (iirc) OS: Windows 11 Pro Peripherals: Joystick: Thrustmaster TM16000M Throttle: Thrustmaster TM16000M Pedals: None (slider used on throttle) Others: None Headtracker: VR (rare occasions) Mission File: Instant action freeflight (also doesnt work anywhere else, including multiplayer) Log: see attached Track: see attached Video/ Screenshots: see link https://streamable.com/vb86yv Mods: Core sounds mod (Echo19) **I tested it both on ST and MT, no luck for either of them also sorry for the blinking in the video, it's likely just a thing for me (it doesnt happen ingame, only out of tab and during videos) dcs.log bug.trk

Hi, I have two monitors: 1. the main monitor with my laptop and its resolution is 3840x2400 2. the 2nd external monitor has the resolution 2560x1440. I would like to have the DCS MT runs on the 2nd monitor, however, the DCS main screen is out of alignment for all clickable areas. For example this following "Exit" is shifted down where the mouse cursor is: I have my appSettings.lus sets below according to the ED tech support suggests (6 lines only): windowPlacement = { ["y"] = 0, ["x"] = 3840, ["w"] = 2560, ["h"] = 1440, } so that my DCS MY main screen will land on the 2nd monitor by default. I have my two monitors lined up at the Windows 11 display setting: Currently, I have set the DCS configuration for Resolution=2560x1440 with the Monitor="1 sceeen". How can I do to fix the DCS main screen clickable areas out of alignment? Thanks.

Hello, I've noticed two issues with IR marker on TGP litening 1) IR marker flickering, it is know issue? Only MT, on "old" client it is without flickering 2) IR marker ignores masking by plane It is known issue? It is track needed? Thanks! Best regards

dcs.log-20231019-172633.zip Attached my logs. I get a crash right when I start up MT via Steam using "play MT preview". Please help. I normally play in VR with my Varjo but I do a lot of ME so I need to be able to run 2D also. Thanks. I should mention that running MT with my Varjo (VR) works fine with no problems.

I am trying to track down a really weird issue i have had with dcs in the last week or so. I am asking how I would inspect the logs/debug/where to look to find out how i can resolve this issue. Only happens in MP not sure if it happens in ST but happens in MT. Single player is fine nothing wrong. Is there a better networking debug i can see? I seem to have a 0.02% loss over the time I play. Happens with all A/C seems to be worse going from f-10 map back to cockpit but it is litterally random when it happens, altough last two times it happened after a missle was fired at me. PC config: mobo: Z790 tomohawk cpu: 13700k (small undervolt to keep temps down 0.050mv) RAM: 6000MT Corsair 32gb NVME: 990 pro GPU: 4080 TUF Issue: Random pausing. Frame times randomly jump to 8-45 seconds. Breif: Had a gpu driver crash last week which cause kernal hangs. No crashes after fixing but the DCS MT MP randomly had long frame times. Installed: DCS OB latest with MT, Scripts: dcs export script for my mfds, scratchpad plus, SRS Mods: Just some Airframes requires for MP server. Step taken to try to resolve: 1. DDU the drivers and clean install. This fixed the black screen crashing of games. 2. Updated Bios, Motherboard drivers, Drivers, windows 11. 3. Removed any scripts i wasn't running (like scratchpad etc) removed from the lua startups etc 4. DCS repair, clean. 5. Removing fxo, metashaders 2 6. Replacing network cables. 7. Turning off SRS,VR in the settings. (i was seeing some 100's of messages from SRS in the log not sure it made a difference). Anything else i can try or logs i can see what causes these pauses. People on the server say they don't experience it so i am thinking the mp server is OK. Thanks!