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Multiplayer VR major FPS drop


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Hey this problem seems to happen intermittently, but happened three times in a row tonight even after complete PC reboots. 

 

I boot DCS and it runs fine. Usually get around 30-60fps in single player. Even in my sqn's servers I usually get good performance. Today I tried to join 4YA servers, and every time I loaded into the server my fps would instantly drop to 3-7. Total slide show. It has happened before on other servers, but usually a reboot fixes. The even weirder part is if I exit to main menu after joining the server, the FPS even in the menu remains low. 

 

Anyone else had this issue? 

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I would guess the CPU as bottleneck. And such large servers also leads on drops on my PC, even though not so hard as you have.

What are you system Specs? (CPU, GPU, Memory)

 

Since when does that happen? Was there a special version? Also maybe 4YA changed somethin in their missions. Somehing like wake turbulence.

 

Can you run logs of CPU/GPU usage - once in SP once in MP. This may show what component might be responsible. As first approach, you can open the Performance monitor from windows, and while being in the game show what they show (the graphs).

 

Do you use Steam for VR? Maybe try alternative OpenXR


Edited by Limaro

Windows 11 Pro 64Bit - AMD Ryzen 5800X3D - AMD 6900 XT - 64 GB RAM

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The performance graph I was looking at did show the CPU as being the bottleneck. (i5 9700k, overclocked) but if it was only a server problem, would the issue not go away once I back out of the server to the main menu? Because it doesn't stop being a slide show even when I'm back in the main screen. 

Rest of system specs are:

2080ti, 32gb ram, m.2 nvme, Windows 10, OpenXR

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Oh, I am sorry, I missed the part with the menu being also slow.

In that case, it makes it much harder to find. Still, did you have this wil older versions?

Can you verify, that your CPU is running at full performance in this situation? (Can it be overheated)? Does this drop also affect other applications (You meant, you have to restart, so what happens if you dont restart and start another game)?

Windows 11 Pro 64Bit - AMD Ryzen 5800X3D - AMD 6900 XT - 64 GB RAM

VPC MongoosT-50CM2 Throttle, VPC WarBRD Base, VPC MongoosT-50CM2 Grip

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  • ED Team

If the PC is rebooting I would first check temperatures and power issues. 

Take a look at windows event viewer it may have some clues. 

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Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status

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I just experienced the same thing. The FPS and performance is just fine at the beginning, only to drop after a random, rather short period of time to about 20-25 FPS. Going back to main menu, FPS remain low.

PC specs: Ryzen 7 5800X OC'd to 4.7, RTX 3080, 64 GB RAM, DCS on a M.2 SSD with plenty of free space.

Temps are definitely not the issue in my case as I've never exceeded 60 celsius on CPU (usually low to mid 50s), and 62-63 top on GPU.

EDIT: Started after the lastest OB update.


Edited by =OPS=Slider
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On 5/18/2022 at 3:39 PM, Prelude said:

Hey this problem seems to happen intermittently, but happened three times in a row tonight even after complete PC reboots. 

 

I boot DCS and it runs fine. Usually get around 30-60fps in single player. Even in my sqn's servers I usually get good performance. Today I tried to join 4YA servers, and every time I loaded into the server my fps would instantly drop to 3-7. Total slide show. It has happened before on other servers, but usually a reboot fixes. The even weirder part is if I exit to main menu after joining the server, the FPS even in the menu remains low. 

 

Anyone else had this issue? 

I believe I've experienced this issue too on the odd occasions (on Stable release). FPS go to the dogs - 15fps or below into single digits like you. Exit back to the menu - and it remains poor even at the menu out of multiplayer. Requires me to exit DCS completely and even when exiting windows goes slow for another couple of seconds until DCS fully closes in the background and then I'm back to normal.

IIRC I've only seen this happen on Multiplayer servers - and that on servers with Wake Turbulence turned on. Not saying that is the cause because that could simply just be a coincidence as well, but probably something worth keeping in mind. I'm also running in VR. 

 

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23 hours ago, BIGNEWY said:

If the PC is rebooting I would first check temperatures and power issues. 

Take a look at windows event viewer it may have some clues. 

Thanks for the reply, but no my PC isn't rebooting on its own. I have tried rebooting it before joining the server to make sure it's not some weird glitch. 

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  • ED Team

Please include the dcs log we can look for clues. It can be found in your saved games dcs logs folder

alternatively 

Please contact technical support here 
https://www.digitalcombatsimulator.com/en/support/
or email support@digitalcombatsimulator.com

The guide below will help you provide the data needed.
https://www.digitalcombatsimulator.com/en/support/faq/support_ticket/

Thank you
The Eagle Dynamics

smallCATPILOT.PNG.04bbece1b27ff1b2c193b174ec410fc0.PNG

Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status

Windows 11, NVIDIA MSI RTX 3090, Intel® i9-10900K 3.70GHz, 5.30GHz Turbo, Corsair Hydro Series H150i Pro, 64GB DDR @3200, ASUS ROG Strix Z490-F Gaming, HP Reverb G2

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I'm having the exact same issue. Right after the last open update I'm experiencing incredibly low frame rates and massive stuttering. I was on the 4YA Caucus map server trying to fly the F-14, but I wasn't having too much trouble if I took the P-47 on the server.

I attached my log file if that helps.

 

dcs.log

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I recognize the main symptom, indeed:

2022-05-22 00:47:32.068 ERROR   SOUND: render time = 0.022026s exceeded allowed slice of 0.010000s
2022-05-22 00:47:33.148 ERROR   SOUND: render time = 0.021841s exceeded allowed slice of 0.010000s
2022-05-22 00:47:33.469 ERROR   SOUND: render time = 0.012441s exceeded allowed slice of 0.010000s
2022-05-22 00:47:33.849 ERROR   SOUND: render time = 0.022596s exceeded allowed slice of 0.010000s
2022-05-22 00:47:34.060 ERROR   SOUND: render time = 0.014410s exceeded allowed slice of 0.010000s
2022-05-22 00:47:34.187 ERROR   SOUND: render time = 0.021680s exceeded allowed slice of 0.010000s
2022-05-22 00:47:34.975 ERROR   SOUND: render time = 0.019122s exceeded allowed slice of 0.010000s
2022-05-22 00:47:36.414 ERROR   SOUND: render time = 0.017834s exceeded allowed slice of 0.010000s
2022-05-22 00:47:51.133 INFO    NET: Current ping: 82.9ms
2022-05-22 00:47:56.402 ERROR   SOUND: render time = 0.015865s exceeded allowed slice of 0.010000s
2022-05-22 00:48:06.506 ERROR   SOUND: render time = 0.010288s exceeded allowed slice of 0.010000s
2022-05-22 00:48:07.396 ERROR   SOUND: render time = 0.010755s exceeded allowed slice of 0.010000s
2022-05-22 00:48:07.446 ERROR   SOUND: render time = 0.010158s exceeded allowed slice of 0.010000s

 

Have you tried disabling HAGS (GPU Scheduling) in Windows? Is your Windows power plan set to the max?

Don't accept indie game testing requests from friends in Discord. Ever.

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10 hours ago, Flappie said:

I recognize the main symptom, indeed:

2022-05-22 00:47:32.068 ERROR   SOUND: render time = 0.022026s exceeded allowed slice of 0.010000s
2022-05-22 00:47:33.148 ERROR   SOUND: render time = 0.021841s exceeded allowed slice of 0.010000s
2022-05-22 00:47:33.469 ERROR   SOUND: render time = 0.012441s exceeded allowed slice of 0.010000s
2022-05-22 00:47:33.849 ERROR   SOUND: render time = 0.022596s exceeded allowed slice of 0.010000s
2022-05-22 00:47:34.060 ERROR   SOUND: render time = 0.014410s exceeded allowed slice of 0.010000s
2022-05-22 00:47:34.187 ERROR   SOUND: render time = 0.021680s exceeded allowed slice of 0.010000s
2022-05-22 00:47:34.975 ERROR   SOUND: render time = 0.019122s exceeded allowed slice of 0.010000s
2022-05-22 00:47:36.414 ERROR   SOUND: render time = 0.017834s exceeded allowed slice of 0.010000s
2022-05-22 00:47:51.133 INFO    NET: Current ping: 82.9ms
2022-05-22 00:47:56.402 ERROR   SOUND: render time = 0.015865s exceeded allowed slice of 0.010000s
2022-05-22 00:48:06.506 ERROR   SOUND: render time = 0.010288s exceeded allowed slice of 0.010000s
2022-05-22 00:48:07.396 ERROR   SOUND: render time = 0.010755s exceeded allowed slice of 0.010000s
2022-05-22 00:48:07.446 ERROR   SOUND: render time = 0.010158s exceeded allowed slice of 0.010000s

 

Have you tried disabling HAGS (GPU Scheduling) in Windows? Is your Windows power plan set to the max?

Thanks Flappie. Yes, I have those settings in Windows. I did a little digging, and I realized I had certain sound settings in DCS. Specifically I had radio sounds on my headset and external engine and environment sounds set on my default soundcard for speakers. I'm thinking something is going on here and caused some issues. I changed the settings to just all sounds to my headset and FPS seemed to improve.

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No, I meant that the fact sound related "exceeded allowed slice" messages appeared in your log shows DCS was freezing. These messages are produced when DCS freezes, not the other way around.

Don't accept indie game testing requests from friends in Discord. Ever.

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9 hours ago, Stele said:

Thanks Flappie. Yes, I have those settings in Windows. I did a little digging, and I realized I had certain sound settings in DCS. Specifically I had radio sounds on my headset and external engine and environment sounds set on my default soundcard for speakers. I'm thinking something is going on here and caused some issues. I changed the settings to just all sounds to my headset and FPS seemed to improve.

This is interesting. Are you saying that having multiple sound outputs causes FPS issues in DCS. 

I had issues the other night on a multiplayer server. FPS was lower than it normally was. I never thought much of it at the time but when I first started DCS there was no sound coming through. I had to go and change the sound settings from DEFAULT to my headset in DCS in order to get it to work (and when I changed back to Default it still worked) - but now I'm wondering if those two are linked. Just hypothesising at the moment but next time I have FPS issues on a MP server I may try changing all my sounds to the one source to see if this helps.

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On 5/20/2022 at 8:56 AM, BIGNEWY said:

Please include the dcs log we can look for clues. It can be found in your saved games dcs logs folder

alternatively 

Please contact technical support here 
https://www.digitalcombatsimulator.com/en/support/
or email support@digitalcombatsimulator.com

The guide below will help you provide the data needed.
https://www.digitalcombatsimulator.com/en/support/faq/support_ticket/

Thank you
The Eagle Dynamics

I opened a support ticked and attached the log file.

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Further experimentation, it's an intermittent issue. Same server, same players connected, sometimes I"ll load in and get 40fps pretty consistently, other times I"ll load in and it's instantly a slide show.

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On 5/23/2022 at 3:25 AM, Dangerzone said:

This is interesting. Are you saying that having multiple sound outputs causes FPS issues in DCS.

that is indeed an interesting and possible issue. integrated sound card does use cpu. many computers have them built-in nowadays. 

https://www.toptenreviews.com/sound-cards-are-they-worth-it

back in the day, all serious gamers had an add-on sound card.

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On 5/29/2022 at 6:54 AM, Prelude said:

Further experimentation, it's an intermittent issue. Same server, same players connected, sometimes I"ll load in and get 40fps pretty consistently, other times I"ll load in and it's instantly a slide show.

Do you have any thing that can tell where the bottle neck is. Especially with multiplayer servers - I find I have issues with CPU bottlenecking. I'm only running a 2080S, so I would expect the GPU to be the bottlenext, but it's the CPU.

I've found this will vary - depending on a number of factors including:

- How many players are online at that time

- How many AI units are active, and how many of those are routing / on the move or doing other calculations (SAM Sites)

- What LUA scripts may be triggered behind the scenes on the server

This means that the same thing on one server can give different FPS's at different times due to other factors that are different at that particular time with the server's scenario. I used to blame my GPU until I had software that would show me live what was happening with both GPU and CPU and discovered it was a CPU issue.

This has been gradually getting worse (Thank goodness for OpenXR that allows for smooth VR rendering at lower FPS's, or I'd be screwed in MP by now). I switch back to single player - and frames improve immensely. I don't know if it's getting worse as DCS do more updates and have 'more' processing in their base code, whether it's the servers that are having more activity, or as scripts are getting more complicated,  or a combination of all.

The situation has been discussed to death multiple times on this forum - and the general consensus is an expectation that it will only continue to get worse until multithreading / Vulkan is implemented. Until then - we need to make compromises, or find workarounds - whether that be overclocking,  using OpenXR for smoother frames at lower FPS's, etc and find the 'things' that are causing the increase in usage (someone mentioned that multiple sound outputs may be a contributing factor to CPU for instance) - and dial down all the things that can add to CPU overhead.

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On 5/29/2022 at 2:48 PM, silverdevil said:

back in the day, all serious gamers had an add-on sound card.

True. Of course, back in the day, motherboards had no sound chips. 😉

I have a sound card sleeping in a drawer. When I find some time, I'll make a benchmark and report here.

@Dangerzone Interesting. Maybe I should make a benchmark with a PCIE network adapter as well. I have one at my workplace.

Don't accept indie game testing requests from friends in Discord. Ever.

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