CPU core affinity

Here's a blue post stating that WoW really doesn't do much with more than 2 cores, which I think I misunderstood to say that it was related to affinity. :P My bad! /drunk

[edit] Nope, not THAT /drunk. Original blue that prompted this post (also linked in the OP):

http://forums.worldofwarcraft.com/th...geNo=1&sid=1#4

Quote:

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You can use this to let WoW run on a specific core(s) but it only works up to two cores. If you set it on 15, you just let the game use 2 out of your 4 processors but you didn't tell it which ones.

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Quote:

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Q u o t e:


So if I am understanding correctly, WoW still only uses two cores, while Windows will, instead of using the same two 'default' cores, be split into other, unused, cores?

Core 1-----Core 2------Core 3------Core 4
WoW--------WoW---------Windows etc.

I dont know much about this whole thing but bottom line, when will WoW itself use four-cores?

World of Warcraft is capped to two cores because we set the default processaffinitymask to 2. There's actually quite a few threads that the game runs but mainly 2 or 3 decent-sized ones and a dozen little ones. Windows can distribute all of these among other cores if you tell it to but you can't specifically tell what thread will go where.

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Note the part in bold/underline in that last sentence. It is a critical point. ;) I leave the why as an exercise to the reader.