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post #251 of 253
Quote:
Originally Posted by Shrimpykins View Post
Not quite. The work does get distributed among all available cores actually. This is clearly seen when you scale up from 2 cores. A dual core will be running around 100% on each core, a quad will be running 50% on each, 8 cores will be 25%, etc. And it scales up perfectly just like that. If you have one core not doing 50% on a quad, another will be doing more than 50% to make up for it.
Do you happen to have a source for this? I'd genuinely like to read up about how windows manages threads and assigns them to a core (my own personal interest, I'm not doubting your claim )
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Bye Bye 775
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post #252 of 253
Thread Starter 
Its true what they say, but if WoW was truly single threaded than the cpu usage would be limited to 25% total across all 4 cores.

However as soon as I turn it up to 4 cores I see 44-50% total cpu usage from WoW, the reason I believe it doesn't peg itself to 100% on both cores (when assigned to only two) like it would if it was assigned to a single core is because I believe one core is doing stuff the other needs to wait to be done before doing anything itself.

Here is the two core usage again:



The way I look at that is 1 core is getting nearly maxed out, however the second is running around 85% avg. Even though I'm clearly bottlenecked on my video cards - I believe its because thats all my cpu can get out of the game. I would be curious to see what kind of usage others get in wow assuming their gpu(s) is(are) running around 60% usage.
Edited by BallaTheFeared - 5/13/11 at 1:18pm
    
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post #253 of 253
WoW itself can only make use of two logical CPUs, one is used for the main thread and the other being used for sound and miscellaneous threads. Most if not all of the first logical CPU will be used by the main thread, if it needs more it will spill over onto a second logical CPU.


This is where Windows steps in, the load is distributed among the rest of the cores. The problem is with WoW not being coded for true multiple core support, just two logical CPUs and multi-threading. No matter how hard you try WoW isn't going to exceed two logical CPUs without Blizzard doing some reprogramming.
Edited by maik - 5/13/11 at 2:52pm
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