Performance issue after looking the F10 map

[Colos1357]

Hi!

This bug has been around for months and is happening on the Caucasus, Kola and South Atlantic maps.

If I switch from the cockpit to the 10 map and then back, the performance is degrades.

Here a shortly video from the issue (The GPU utilization can be seen in 2nd line of the OSD in top left.): 

 

dcs.log DxDiag.txt

[Kanelbolle]

3 hours ago, Colos1357 said:

Hi!

This bug has been around for months and is happening on the Caucasus, Kola and South Atlantic maps.

If I switch from the cockpit to the 10 map and then back, the performance is degrades.

Here a shortly video from the issue (The GPU utilization can be seen in 2nd line of the OSD in top left.): 

 

dcs.log 98.72 kB · 5 downloads DxDiag.txt 111.71 kB · 5 downloads

According to your log file, your graphic settings are quite high. Just to test, try setting the "Low" preset in the Launcher or in-game and try the same.
Suspecting it is your VRAM usage that is high, so it reaches max and tanks the performance. But might as well also be a bug.

 

As far as performance in the F10 map alone, it is and has always been bad in "Altitude" mode. If you change it to Satellite or MAP mode, the FPS goes up.

 

 

[Colos1357]

Hi!

This is also the case with lower settings. I increased yesterday the shadows from medium to high and the terrain shadows from flat to default.

I tested this issue some week ago, lower graphic setting does not fix.

[Colos1357]

I tried any graphic settings, the GPU utilization increased +15..20...25 prcent, after I switch to the map...

[okopanja]

Workaround: before moving, switch to f10, center on airplane (icon rectngular up right). Now switching will not cause an fps drop.

Explanation: f10 map actually renders DCS world from above. If the center point differs from aircraft, dcs will start loading detailed map and thus cause DCS to worknvery hard with GPU.

[Colos1357]

22 hours ago, okopanja said:

Workaround: before moving, switch to f10, center on airplane (icon rectngular up right). Now switching will not cause an fps drop.

Explanation: f10 map actually renders DCS world from above. If the center point differs from aircraft, dcs will start loading detailed map and thus cause DCS to worknvery hard with GPU.

I tried it, but it didn't work.

[okopanja]

4 hours ago, Colos1357 said:

I tried it, but it didn't work.

Once you enable center it has to be on all the time.

null

[Colos1357]

7 hours ago, okopanja said:

Once you enable center it has to be on all the time.

null

Yes, that's what I did too.

[okopanja]

2 hours ago, Colos1357 said:

Yes, that's what I did too.

you might be having additional problem.

On my side: RTX 2070 Super with 8GB, 64GB RAM.

[Colos1357]

On 10/27/2024 at 10:06 PM, okopanja said:

you might be having additional problem.

On my side: RTX 2070 Super with 8GB, 64GB RAM.

I have RTX3070Ti 8 GB, 64GB RAM, i7-9700K CPU. 

It is interesting, that i did not see this bug in the Syria map.

[okopanja]

3 hours ago, Colos1357 said:

I have RTX3070Ti 8 GB, 64GB RAM, i7-9700K CPU. 

It is interesting, that i did not see this bug in the Syria map.

I think that issue is related to the systems with 8GB VRAM.

E.g. issue is

- practically not present in Caucasus with FC3 (GS)

- present on Caucasus with JF-17 (GS)

- very pronounced on Syria (Contention)

On Syria, I am more close to the limit, and I think the freeze that occurs is related to load textures at that moment. Not sure if someone with 12GB or more has the issue.

[Colos1357]

On 10/30/2024 at 12:33 AM, okopanja said:

I think that issue is related to the systems with 8GB VRAM.

E.g. issue is

- practically not present in Caucasus with FC3 (GS)

- present on Caucasus with JF-17 (GS)

- very pronounced on Syria (Contention)

On Syria, I am more close to the limit, and I think the freeze that occurs is related to load textures at that moment. Not sure if someone with 12GB or more has the issue.

I monitored the videoram utilization, there is no correlation. I have seen falling FPS with lower video ram utilization, and high FPS with higher video RAM utilization. I haven't checked to see if it's related to the module. I'll have a look.

[Fiztex]

This is definitely related to VRAM as caching from slower memory is the only reason for such significant fps drops, and lowering textures normally helps at least to delay this issue. ED knows about this for years but we haven't seen the changes yet. You can get this "achievement" even with 16 GB VRAM with some maps+module combinations, especially in big scenarios or MP, e.g. BS3 or Apache with Marianas, so 4090 is kind of needed for VR in such cases, or you fly smaller mission with lower textures and simpler modules.

Ultimately, avoiding external views, and using kneeboards instead of F10 is the solution right now. Sometimes Alt+Tab helps, or headset connect/disconnect (e.g possible with Virtual Desktop) - I guess this forces the game to rebuild VRAM cache.

Edited November 7, 2024 by Fiztex

[okopanja]

You might want to experiment with CPU affinity.

E.g. I got 6 cores x 2 (multithreading).

Just for fun I disabled every even core, and stutter was much shorter. It was still there, but not few seconds.

Need to test this under more realistic conditions, since I am not sure that this does not cause another issue

How to set affinity?

You need to calculate a number from the bit field where each bit represents the core.

Easy way to do this is to:

1. start Calculator

2. switch to Programmer mode

3. switch to BIN

4. type e.g. 010101010101, and read the value you see next to HEX (if your processor has performance/efficiency cores, you need to find out which bit corresponds to which core, ideally you use performance cores.)

5. go to DCS shortcut and append the following --affinity HEX_NUMBER_YOU GOT

 

 

Edited November 17, 2024 by okopanja

[Loukuins]

On 10/12/2024 at 12:29 PM, Colos1357 said:

Hi!

This bug has been around for months and is happening on the Caucasus, Kola and South Atlantic maps.

If I switch from the cockpit to the 10 map and then back, the performance is degrades.

Here a shortly video from the issue (The GPU utilization can be seen in 2nd line of the OSD in top left.): 

 

dcs.log 98.72 kB · 17 downloads DxDiag.txt 111.71 kB · 11 downloads

I have the same issue since 2022, been trying to tell the dev to fix it but nobody listened, I had this issue since DCS 2.5.8 on every map (but more on caucasus), changed PC since then, even with my high end rig I STILL have the same issue, sometime causing 100FPS LOSS!!!

 

The only workaround I found, is to alt tab in and out of the game and after 2-10sec it will fix itself, it's really REALLY WEIRD.

my PC: 

5800X3D
64GB 3600MHz CL18
RTX 4070 Ti
MX500 SSD

Of course no issue on the rest of the game and everything.

Fix ASAP

[Coxy_99]

Can someone from ED fix this please, I cant do anything............... Cheers. Make it priority or something.

[Raven (Elysian Angel)]

1 minute ago, Coxy_99 said:

Can someone from ED fix this please, I cant do anything............... Cheers. Make it priority or something.

Indeed: I use the Empty_VR_hangar mod for this reason, but to be fair this should be a part of the standard sim, not requiring a mod.

[LittleNose]

21 hours ago, Raven (Elysian Angel) said:

Indeed: I use the Empty_VR_hangar mod for this reason, but to be fair this should be a part of the standard sim, not requiring a mod.

I agree, it would be nice to have this as an option in setting somewhere.

[Coxy_99]

Bumping this nightmare someone take a look at it thanks.

[Loukuins]

Using this mod can't help me, I'm on 2D desktop, a friend of mine have the issue aswell and he just installed DCS on my PC for the first time 

[Coxy_99]

2 hours ago, Loukuins said:

Using this mod can't help me, I'm on 2D desktop, a friend of mine have the issue aswell and he just installed DCS on my PC for the first time 

Lets bump this thread ED might see it

[Loukuins]

1 hour ago, Coxy_99 said:

Lets bump this thread ED might see it

I don't have much hopes, had this issue on 4 different pc since 2021

[Loukuins]

You see, nobody cares, they will never care because the core of the game is a mess they will never improve (I'm talking about graphics or new features)

[Parrotnut]

Excluding DCS folder, save games folder and DXCache ( C:\Users\Your name\AppData\LocalLow\NVIDIA\PerDriverVersion ) folder from "Windows Defender" helped my game run smooth with the F10 map. Maybe something to try?

( Spudknocker video how to: )

 

[sleighzy]

For an alternative map use the DCS Web Editor Moving Map. It’s a dynamic F10 map replacement. For VR this can be displayed within OpenKneeboard.