this post was submitted on 30 Nov 2024
190 points (96.1% liked)

Linux

48435 readers
666 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago
MODERATORS
 

For me, it's Shared GPU memory.

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 10 points 1 day ago (1 children)

Assuming C:S2 uses DX and you're running it through proton/dxvk, it's ultimately the Vulkan driver's job to page to system memory correctly. This honestly sounds like you're seeing a bug. In that circumstance, it shouldn't crash, it should just hurt performance from all the paging. I see a couple of older issues where people were seeing exactly this kind of issue with DXVK+Nvidia.

  • This old Witcher 3 one where they blamed it on Nvidia's memory allocator not playing well with linux THP (transparent huge pages). Disabling THP was a workaround.
  • This other issue for several titles that were hitting memory alloc failures despite having tons of system memory, just as you describe. They try several workarounds, but ultimately they believe it was fixed by a driver update.

One other thing to try is, idk if you're running the game in dx11 or dx12 mode, but apparently both exist. If it's currently running in dx11 mode, try the launch flag -force-d3d12. If you're already using dx12, maybe try swapping back to dx11. Good luck!

[–] [email protected] 3 points 1 day ago* (last edited 1 day ago) (1 children)

This honestly sounds like you're seeing a bug.

Well, it probably is. I'll soon be getting a GPU with a bigger VRAM and putting that GPU into my home server for Jellyfin as a replacement for QuickSync (NVENC is better, imo).

[–] [email protected] 1 points 1 day ago (1 children)

Did you try their fix? Often it really is as easy as adding a launch option

[–] [email protected] 1 points 1 day ago (2 children)

I added game modern mangohud PROTON_ENABLE_NVAPI=1 %command% to the startup configuration and it still runs like shit. I'll try running it on a Windows VM (VMware as a hypervisor).

[–] [email protected] 1 points 23 hours ago

"Runs like shit" is expected when you're relying on paging to system memory every frame, step 1 is to avoid a crash from oom/failed alloc.

The next step is to reduce paging if possible. I see C:S2 has a min spec of a 4GB GPU. Assuming they actually tuned their game for such a card on windows, the unfortunate reality of proton/DXVK is that there's a bit of a memory overhead and lack of knowledge about residency priority, especially when translating a dx11 game.

DX12 maps to Vulkan more closely, so my hope is that the -force-d3d12 flag would give DXVK better info to work with (ex. hopefully the game makes use of dx12 heaps and placed resources, which are 1:1 with vulkan concepts, and dxvk can make use of that to better ensure the most important resources don't get paged out).

[–] [email protected] 2 points 1 day ago* (last edited 1 day ago) (1 children)

I meant the:

-force-d3d12

one. Might need to put "%command%" after it, but I'm still not 100% sure what that even means and why its there so I dunno.

Edit: I would also check out the entry for the game on ProtonDB if you haven't already (sorry if someone else has already told you all this elsewhere in the thread) to see if anyone else has had similar issues: https://www.protondb.com/app/949230

I haven't played C:S2 yet, so I can't say personally, but it could just be a poorly optimized game.

[–] [email protected] 1 points 23 hours ago

The -force-d3d12 option is a param to the actual game, so it would go after %command% (or by itself if no prefixes are being added).