[Bug 21165] Borderlands is ~3x slower under Wine (GeForce Go 7900 GS).

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=21165





--- Comment #14 from Stefan Reich <winehq at halbling.de>  2010-02-17 13:23:45 ---
(in reply to comment #12)
> (In reply to comment #11)
> > ...
> > No idea why borderlands doesn't use multicore in wine :-/
> 
> It might be that Wine doesn't support SetThreadIdealProcessor yet.  I've seen
> that show up in the log for a lot of games, though I cannot remember if
> Borderlands is one of them.

Well, I did some more code reading, testing and adding debug output...

Borderlands doesn't seem to call SetThreadIdealProcessor, but it does something
(incredibly stupid?) with SetThreadAffinityMask:

> fixme:thread:SetThreadAffinityMask (0xfffffffe,0x1): stub
> fixme:thread:SetThreadAffinityMask (0xfffffffe,0x2): stub
> fixme:thread:SetThreadAffinityMask (0xfffffffe,0x4): stub
> fixme:thread:SetThreadAffinityMask (0xfffffffe,0x8): stub
> fixme:thread:SetThreadAffinityMask (0xfffffffe,0x1): stub
> fixme:thread:SetThreadAffinityMask (0xfffffffe,0x1): stub
> fixme:thread:SetThreadAffinityMask (0xfffffffe,0x1): stub
> fixme:thread:SetThreadAffinityMask (0xfffffffe,0x1): stub
> fixme:thread:SetThreadAffinityMask (0xfffffffe,0xffffffff): stub
> fixme:thread:SetThreadAffinityMask (0x1bc,0xffffffff): stub
> fixme:thread:SetThreadAffinityMask (0x458,0xffffffff): stub
> fixme:thread:SetThreadAffinityMask (0x464,0xffffffff): stub
> ...[more 0xff sets]

As can be deduced from the debug output, I simply 'deactivated' the affinity
mask for the time being...and what happen?
--> Got 40/70/40/40 CPU usage and 30-40 fps, which is actually quite playable.

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