[Bug 11674] Dual-core unsupported in WoW and SC2

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=11674

Kol <kol at MV8660.spb.edu> changed:

           What    |Removed                     |Added
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                 CC|                            |kol at MV8660.spb.edu

--- Comment #278 from Kol <kol at MV8660.spb.edu> 2013-01-02 21:54:39 CST ---
Let me present my results of tests in real applications.
Testing some old games I found that the BufferSubData patch
is better to use along with the Crysis Memory patch from Bug#18799,
which sets WINED3D_BUFFER_DOUBLEBUFFER flag in "buffer_init"
function in "dlls/wined3d/buffer.c".

All tests were carried out under Wine 1.5.20 with WINEDEBUG="-all"
and with the use of Nvidia proprietary driver 310.19.
For each game I estimated the average number of FPS in some
fixed scene with distant land and moving objects visible
in 4 variants:
1. unpatched Wine with threaded optimisations disabled;
2. unpatched Wine with threaded optimisations enabled;
3. Wine with the BufferSubData patch, threaded optimisations enabled;
4. Wine with the BufferSubData and the Crysis Memory patch,
   threaded optimisations enabled.
The results are
TES3:Morrowind  36/47/47/50,
TES4:Oblivion   52/57/62/70,
TES5:Skyrim     19/22/27/36.
For Crysis 1 enabling of threaded optimisations decreases
performance but the BufferSubData patch increases it again.
To start this game the patch from Bug#18799 is necessary,
so I tested variants 1-3 with this patch,
FPS are 57/43/77.

The only example of decreasing performance (10 times) with
the BufferSubData patch which I saw is
Heroes of Might & Magic 5:  70/21/2/2.
I think that this is due to WINED3D_BUFFER_DOUBLEBUFFER flag,
because under Wine patched only with the Crysis Memory patch
the game also shows ~2 FPS.

Also, it seems that all these things have nothing to do with
optimisations for multi-processor systems. For example, in Skyrim
under Wine with both patches and threaded optimisations enabled
the full CPU load by the main process "TESV.exe" for a quad core
processor is 110%-120% (must be 300%-400% ?).

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