Update broke my game

[Gunfreak]

 

Tried to play today for the first time after the update, I get 5-10FPS and I'm CPU bound with 30% CPU power.

Before the update I had this mission running smooth at 70FPS in VR and 120 in flat. Now I have 9 FPS in flat and 5 in VR. I've done the basic delete meta shader, fxo, I have no mods installed, never had mods installed on this install ever.

It seems it uses very little of any GPU power
All other games work exactly as they should an always have.
I'm now verifying the installation in steam and updating the NVidia driver, don't know what else to do

Edited 23 hours ago by Gunfreak

[Gunfreak]

Updated drivers no help.

Did integrity check on steam, 4 files was redownloaded no help.

Reset settings in Nvidia control panel no help.

Went into bios to make sure the game couldn't use integrated GPU. No help. 

No other games are affected, 3D mark gives the same score as last week. 

I did notice that when DCS loads to the main menu, it takes 2-3 seconds for Multiplayer to become available, this has usually been instantaneous. If this is related i do not know.

Mission editor works perfectly. And it seems DCS uses more GPU in menus. But once the mission starts. My GPU goes down to 5-15% and has a temperature of 30-40C, so not working at all in the game

 

[sleighzy]

Please replicate the issue and then attach your C:\Users\username\Saved Games\DCS\Logs\dcs.log file (just a text document named "dcs" if your Windows is hiding file extensions).

[Gunfreak]

dcs.log

[Kanelbolle]

11 minutes ago, Gunfreak said:

dcs.log 400.25 kB · 1 download

Log analyser on DCS discord points to Nvidia Drivers

• If you have stability or performance issues pointing to your GPU, rollback the GPU driver to version 566.36,
• Disable Core Parking.,
• Verify that this is configured correctly in Windows:
  • Game Mode disabled,
  • Hardware accelerated GPU scheduling disabled,
  • Core Isolation disabled

 

Tuning Tips

 

• Remove the OH6GunnerExport script for performance reasons.,
• Consider using DLAA.,
• Turn off SSLR.,
• Turn off SSAO.,

Tuning tips are recommendations for better FPS based on your CPU, GPU and RAM. They might result in slightly decreased display quality.

[Gunfreak]

1 hour ago, Kanelbolle said:

Log analyser on DCS discord points to Nvidia Drivers

• If you have stability or performance issues pointing to your GPU, rollback the GPU driver to version 566.36,
• Disable Core Parking.,
• Verify that this is configured correctly in Windows:
  • Game Mode disabled,
  • Hardware accelerated GPU scheduling disabled,
  • Core Isolation disabled

 

Tuning Tips

 

• Remove the OH6GunnerExport script for performance reasons.,
• Consider using DLAA.,
• Turn off SSLR.,
• Turn off SSAO.,

Tuning tips are recommendations for better FPS based on your CPU, GPU and RAM. They might result in slightly decreased display quality.

That's what the AI always says.

This is not some minor performance bug, it has broken the game. my GPU is idle during gameplay. 
We aren't talking 10 or even 20 FPS drop, we are talking 120+ FPS drop. It's broken.

[Temetre]

Theres a big performance bug currently, causes a ton of CPU load. For some its not as bad, eg my game runs somewhat worse but playable even in VR, but for others DCS became nearly unplayable.

I imagine thats your issue. Seems like theres nothing you can really do about it.

[Gunfreak]

1 minute ago, Temetre said:

Theres a big performance bug currently, causes a ton of CPU load. For some its not as bad, eg my game runs somewhat worse but playable even in VR, but for others DCS became nearly unplayable.

I imagine thats your issue. Seems like theres nothing you can really do about it.

One thing is CPU load. But why would that cause my GPU to idle? It's literally sitting at 10-20% usage and 30C so just idling. Not engaged at all .

[Temetre]

Gerade eben schrieb Gunfreak:

One thing is CPU load. But why would that cause my GPU to idle? It's literally sitting at 10-20% usage and 30C so just idling. Not engaged at all .

Thats normal behaviour. Basically, usually in games you hit a 'bottleneck' in your PC, which could be CPU, GPU, memory and other things. Im gonna oversimplify it a lot (not like im an expert anyway):

For example, maybe your GPU could do 100 frames per second, and your CPU can only does 20 fps with the performance bug. But you need both to actually create a frame!

So that means that your GPU will create a frame in 10 miliseconds, but then has to wait for the CPU which needs 50 miliseconds. Hence 80% of the GPUs time might be spent waiting on the CPU to do its job, so the graphics cart can finally start to work on the next frame. That is then shown in the 20% GPU usage.

When you 'run out' of RAM/VRAM, you might also experience stutters. Thats a memory bottleneck, where the entire PC slows down to wait for files to be loaded into memory.

 

Most PCs and games these days tend to be GPU limited, meaning the GPU sees 100% usage and the CPU has to wait. I think thats why people often expect 100% GPU usage, but complex, CPU heavy games like DCS can be an exception. And in this case you probably have a performance bug that cripples CPU performance, so the GPU spends a lot of time waiting.

[Gunfreak]

6 minutes ago, Temetre said:

Thats normal behaviour. Basically, usually in games you hit a 'bottleneck' in your PC, which could be CPU, GPU, memory and other things. Im gonna oversimplify it a lot (not like im an expert anyway):

For example, maybe your GPU could do 100 frames per second, and your CPU can only does 20 fps with the performance bug. But you need both to actually create a frame!

So that means that your GPU will create a frame in 10 miliseconds, but then has to wait for the CPU which needs 50 miliseconds. Hence 80% of the GPUs time might be spent waiting on the CPU to do its job, so the graphics cart can finally start to work on the next frame. That is then shown in the 20% GPU usage.

When you 'run out' of RAM/VRAM, you might also experience stutters. Thats a memory bottleneck, where the entire PC slows down to wait for files to be loaded into memory.

 

Most PCs and games these days tend to be GPU limited, meaning the GPU sees 100% usage and the CPU has to wait. I think thats why people often expect 100% GPU usage, but complex, CPU heavy games like DCS can be an exception. And in this case you probably have a performance bug that cripples CPU performance, so the GPU spends a lot of time waiting.

Ah. Ok. Then there is hope. I was afraid I very unique problem. And would be left behind if that more common bug was fixed.  So I guess I'll just have to wait. Have others reported FPS as low as 5? I've seen other report big fps drops. But haven't seen talk about sub 10 fps.

[Temetre]

Gerade eben schrieb Gunfreak:

Ah. Ok. Then there is hope. I was afraid I very unique problem. And would be left behind if that more common bug was fixed.  So I guess I'll just have to wait. Have others reported FPS as low as 5? I've seen other report big fps drops. But haven't seen talk about sub 10 fps.

Ive actually just read of someone with an I7 7900X (older 8 core CPU), who says hes got 99% CPU usage and the game is basically unplayable. The only way to get such a usage with 8 cores is some kind of bug (or hardware issue), so youre probably not alone. 

Its not special for bugs like this affect people very differently. Ive seen people with powerful CPUs get 3 cores maxed, while my basic mid tier CPU (I5 12400F) just gets weird load spikes distributed over all cores and isnt as affected. Ive actually played a VR liberation mission today, and ran a bit worse, but playable and fun.