Where is my address space?

[Henri Verbeet]

On 19 August 2016 at 11:56, Snorri Sturluson
<snorri.sturluson at ccpgames.com> wrote:
> I’m trying to understand the memory usage of Wine. My focus is to make EVE Online run on the Mac as smoothly as possible, and one of the issues I’m running into is that the game runs out of memory in heavy scenes, especially when running at high resolutions on Macs with Retina screens.
>
> On Windows, a scene with 300 ships in space may be running in 2.1GB of page file usage, but the same scene under Wine will show a Virtual Memory size of 3.5GB or more. Once the Virtual Memory size (as shown by the Activity Monitor) gets too close to the 4GB mark I start getting errors from Wine, failing to allocate memory, usually leading to a crash.
>
> There is a significant difference even when running at the same resolution on both Windows and Mac, and further pronounced if I run in the full 5k resolution of an iMac.
>
> Can anyone explain this big difference in memory use between the Windows and Wine sessions? Or give me ideas on how I can figure it out? Or better yet, have suggestions on how to reduce it?
>

I think Matteo most recently looked at this on OS X. IIRC the bottom
line was that the biggest offender was the OS X OpenGL stack, but
there may be some hacks that can free up some additional address space
for specific applications. Careful profiling may find places where
Wine itself can be improved. In the longer term though, even on Window
a 32-bit address space is a bit tight for modern games, and you'd want
to look into switching to a 64-bit application.