GTA IV performance worse on 2.5 than on 2.3

[kshep92]

I noticed that I get much more stable performance in GTA IV using DXVK version 2.3 than with the more recent builds. I'm just curious as to if this is a known issue regarding Windows/AMD drivers, or if there's something I need to set/change in order to address the performance issues.

Specifically, I'm getting a lot of stuttering and huge frametime spikes on 2.5, but on 2.3 I'm getting pretty much locked 16.6ms frametime.

Cheers.

[Blisto91]

Hi there. Please fill out the issue template.
Ideally we need info such as GPU, driver, game settings such as resolution etc. Also attach the dxvk log that appears next to the game exe.
If you can make a file called dxvk.conf next to the games exe and insert dxvk.hud = full. After that launch the game and take a screenshot and include it here.

It might also be interesting to test with the latest non release work. A build can be downloaded here https://github.com/doitsujin/dxvk/actions/runs/18954007483

Edit: One particular interesting thing is to know if there is a lot of "-13" error spam in the log since this is Windows amd. If there is then it is a known issue yes.

[kshep92]

Software information

Name of the game: GTA IV
Mods: FusionFix 4.0.1

System information

• GPU: RX 7700XT
• Driver: 25.9.1
• DXVK version: Most recent build
• Windows 10 Pro 2009 19045.5965

Apitrace file(s)

GTA IV API Trace

I've also attached the most recent log file and a screenshot of the game as requested. This is with the latest build you linked .

GTAIV_d3d9.log

[K0bin]

Duplicate of #5216.

Tl;dr: you really need resizable bar and that's not supported and/or enabled ob your system.

[kshep92]

Thank you. I was also experiencing an issue where the game would lock up the display driver and I'd have to restart the PC. Could this be due to VRAM memory management issues that can occur if ReBAR is disabled?

[Blisto91]

That is because the driver is crashing for some reason info: Device lost
Does that also happen with older versions of dxvk?

[kshep92]

It hasn't happened on the older version. Just the newer versions, and it also happens when running the game using the DX9 API.

[Blisto91]

Ah hm that sounds weird. Do you have issues in other games? Could be some hardware instability

[kshep92]

The only other game was Modern Warfare 2 (2009). I was using the 🏴‍☠️ version though, so it might not have been properly updated.

[Blisto91]

At least in regards to the performance issue then as mentioned we recommend that you enable resizable bar if your system supports it