Significant performance drop in 2.9.11.4686

[Limaro]

Hi,

since last patch, performance dropped a lot in my test mission. Especially in VR this resulted in being unplayable. After some testing I found, that it's somehow related to my mission (attached). However, this mission is very small without many units or triggers. I tried to figure out, what in the mission does cause the drops by removing everything. I tried a lot but could not figure out what causes the dramatic loss of performace.

The screenshot shows the performance monitor in case of bad performance. Many unexplainable spikes in CPU area. This leads to stuttering movement and lags. In non-VR it dropped from nice 80-95 FPS down to ~65 FPS. this is a rough guess.
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The missions I attached:

- KA50III_Syria_Test. This is my original test mission which became unplayable.
- KA50III_Bad_Perf. This is the mission, where I nearly removed everything. Only KA50 remaining. It's a little bit better, but not that much.
- KA50III_Good_Perf. I just created a new mission placing the KA50. that works fine.

It would be interesting if someone can confirm the hugh differences in the missions that I observe.

 

I will try to reproduce and test further things in 2D, but just have not that much time.

 

EDIT:

Some strange findings, which I'd like to add: In my KA50III_Syria_Test it seams to be depending on the position of my head. When I move closer to the window, it starts stuttering. when being perfectly centered, everything is fine. Also in game pause, easy to reproduce. but only in this mission, the other us not affected.

EDIT 2

I've tried the FA-18, there is no such effect. also external view seam to be unaffected. Maybe an issue with the KA-50?

KA50III_Syria_Test.miz KA50III_Bad_Perf.miz KA50III_Good_Perf.miz dcs.log

Edited January 14 by Limaro
new findings;solution; change title to move

[Limaro]

I guess I found the actual reason for the drop of performance. It's the weapons. As soon as the KA-50 III is armed the performance drops when looking at it from cockpit. (In the outside view there is no effect). in 2D it's also reproducable, but the performance drops are somehow very little in that case.

I attached three screenshots that shows the effect, when moving the head near the window. The last shows in performance meter the CPU getting a ventricular fibrillation.

I hope someone else can confirm this. I just learned to fly the KA-50, and now, cannot use it any more.

 

[Limaro]

I found only in KA-50 III having that problem. Could an admin please move this to the KA-50 III area, I think it will be more appropriate? https://forum.dcs.world/forum/1108-bugs-and-problems/. Maybe there will be more help to reproduce this specific issue to trace down the root cause.

I am sorry for the inconveniences. The patch came, when I was learning and only flying the KA-50 III so I did not notice this in first place. 

[Temetre]

Im also seeing performance issues in the Black Shark III in VR. Activating the systems/screens causes a clear drop in performance. Interior light costs more frames than usual as well. Frametimes seem quite instable, with a constant GPU bottleneck.  Tested it both on Cola and Syria.

Im getting 60fps over Damascus, 55 if I activate interior light. Skhval sensor can cost another 5-10 frames, which is unusually high compare to other planes I fly.

In comparision, the F-4E Phantom gives me 65-70fps low over Damascus, notably which a much higher frame stabilty. This even in the same game session, first flying BS3 and then F-4E.

 

Im using low textures and checked memory, theres no memory bottleneck. PC is:

CPU: I5-12400 

GPU: AMD 6800 XT (16GB VRAM)

RAM: 32 GB DDR-3000