[Bug 34342] Chronic crash of Guild Wars 2(out of memory)

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=34342

Kaede Fox <sweet.maple.leaf at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |sweet.maple.leaf at gmail.com

--- Comment #19 from Kaede Fox <sweet.maple.leaf at gmail.com> ---
This is a texture memory leak bug.

The problem occurs because GW2 is 32-bit, thus Wine has to share the 4GB memory
space between the application the GPU. Part of NVIDIA's texture memory is
allocated here, a window that behaviors not unlike it does on Windows on 32-bit
systems (which is why you can't usually use more than 3GB of RAM on Windows
XP). In the past, Wine forced a 2GB/2GB divide, but in more recent builds it
seems the application can reach up to 3.5GB or 3.7GB before crashing.

Essentially the game is loading textures too often, and too fast, and Wine
cannot unload them fast enough because it is very restricted with texture
unloading. Wine unloads textures far slower than native Direct3D. This results
in an extremely high memory usage of nearly 200% compared to Windows (e.g 1.6GB
instead of 800MB). This means that while the game would not crash under Windows
XP with the /3GB switch and at least 3GB of RAM available, it will under Linux
even with 4+GB of RAM available on a 64-bit OS.

The proper way to fix this is to make Wine free textures very aggressively.
I've looked into patching it to do so, but I lack the required skills.

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