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BC2 maxes one core and barely touches the rest - Page 4

post #31 of 39
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Quote:
Originally Posted by mental.patient View Post
For me that happnd when one of the cores was slightly unstable with the OC how have u tested stability?
Well its definitely stable I can tell you that lol. It has been running at 3.8 for almost 6 months now and never had any issues. I also ran memtest, prime95, and occt overnight when I did my OC with no issues. temps also socket temp never gets above 50 deg
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post #32 of 39
Quote:
Originally Posted by killeraxemannic View Post
Well its definitely stable I can tell you that lol. It has been running at 3.8 for almost 6 months now and never had any issues. I also ran memtest, prime95, and occt overnight when I did my OC with no issues. temps also socket temp never gets above 50 deg
What you're seeing is totally normal
    
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post #33 of 39
Quote:
Originally Posted by Confessed View Post
BC2 really takes advantage of all cores. Mine are all stressed evenly when running the game.
This is how my proc does it as well. I don't really see any core staying at 100% for more than a few seconds. During game play it is even spaced out.

BC2 has minimum req.s for 2 cores but loves a nice 4 core.
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post #34 of 39
Quote:
Originally Posted by brettjv View Post
Somethin I realize that I forgot to clarify, which I suppose is really the heart of the matter here: Even if a game is only coded to use 4 cores/threads, WINDOWS can farm out those threads to more than 4 different cores (be those physical or virtual, i.e. HT).

So ... when you see 6 cores/threads in action in Task Manager, you are actually 'using' all 6 cores ... BUT ... if the game is coded for 4, you'll *never* use all 6 to full capacity at one time.

Thus, the level at which total CPU usage maxes out (again, you must create a cpu-dependent scenario for this to work, which typically involves low gfx settings) is what actually tells you how many cores/threads the game is coded to use.

You simply multiply the total cpu usage % at which your game 'hovers' by how many cores/threads you have. So in the case of BFBC2, my tptal CPU usage hovers at 50%, and I have 8 'virtual' cores, so 50% of 8 = 4.

IOW, the count of the number of threads in Task Manager that you see 'action' on is totally deceptive ... it DOES NOT tell you how many 'cores' the game is 'coded for'.

The reason this is important is because having more cores than what the game is coded for will do you absolutely no extra good in terms of performance (well, aside from being able to better handle the occasional windows side tasks while the game is running ).
OK, so what you are saying is basically, the game can only utilize 4 cores, but it can spread the load out over 6 or 8 cores. However, the game will not exceed the CPU capacity of 4 cores (assuming it needed 100% of all 4 cores), and therefore, you will never see the total CPU usage go over 66% for 6-cores, or 50% for 8-cores (33% for 12 cores, etc...). Am I understanding this correctly?
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post #35 of 39
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Quote:
Originally Posted by RunsCool View Post
OK, so what you are saying is basically, the game can only utilize 4 cores, but it can spread the load out over 6 or 8 cores. However, the game will not exceed the CPU capacity of 4 cores (assuming it needed 100% of all 4 cores), and therefore, you will never see the total CPU usage go over 66% for 6-cores, or 50% for 8-cores (33% for 12 cores, etc...). Am I understanding this correctly?
This would be correct if indeed the game was intended for quad cores only. I have seen no definitive proof one way or another though. No one has any specifics on how the game is coded or set up to work.
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post #36 of 39
isnt this awesome? this just proves how a 6 core isnt really necessary for a gamer D:
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post #37 of 39
Quote:
Originally Posted by RunsCool View Post
OK, so what you are saying is basically, the game can only utilize 4 cores, but it can spread the load out over 6 or 8 cores. However, the game will not exceed the CPU capacity of 4 cores (assuming it needed 100% of all 4 cores), and therefore, you will never see the total CPU usage go over 66% for 6-cores, or 50% for 8-cores (33% for 12 cores, etc...). Am I understanding this correctly?
Quote:
Originally Posted by killeraxemannic View Post
This would be correct if indeed the game was intended for quad cores only. I have seen no definitive proof one way or another though. No one has any specifics on how the game is coded or set up to work.
RC: Yes, you got it exactly ... except it's not exactly the game spreading the load, it's Windows.

KAM: Well, I spelled out at length in posts above how one can deduce this number, and I provided my own screenshots to illustrate.

If you take and lower gfx settings ... low res, no aa, no hbao is probably sufficient ... this minimizes gpu load and speeds up fps, which in turn makes the cpu work as hard as possible. Removing one's CPU overclock would also help create the CPU-dependent scenario one needs for the purposes of this testing procedure.

You then run the game and watch where the total cpu usage hovers (note: it may occasionally exceed that level due to windows tasks, but the 'hovering point' I speak of should be easy to discern like it is on my screenie).

The math is as follows: take this usage % and multiply by how many cores you have (virtual or otherwise) and this will tell how many cores/threads the game is coded for

Edit: I would bet that the cpu usage line on my screenshot would be a lot more 'solid' if it weren't for the fact that the game appears to have a 200fps cap ... this sorta complicates the testing process here and I didn't know how to remove it offhand so I didn't. I believe my 4-core max analysis is still correct, but it's conceivable that it's not. Any kind of FPS cap (if you hit it, which I did, that's how I know about it) can potentially screw up this testing method, for pretty obvious reasons.
Edited by brettjv - 2/3/11 at 10:45am
    
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post #38 of 39
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Interesting thing to add to this thread..... I got my second 5850 today...... Cpu usage for the game completely evened out. It runs at about 55-60 % across all cores evenly now.
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post #39 of 39
Weeeeeeeeeeeeeeeeeeeeeeeeee! Here's a fun one!



Averaging just over 80% usage across 4 cores. IIRC, I took this screenie on a Q9550/GTX 260 combo using high settings @ 1680x1050. Crazy how rough this game can be on a system. Linx can run day and night, but one map load's all it takes to crash an unstable OC...hah! I mean...lame...really, I lost a lot of time getting to 4Ghz.
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