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Only one core at 100%, and hiccups...
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Hellgiver
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Only one core at 100%, and hiccups...
I was recently experiencing some hiccups in my game Torchlight, and was wondering what it could be. I minimized it and looked at my CPU monitor, and saw that Core 1 is at 100%, while the almost all other cores are all at 0%, with 3 of them 1%-5%. Is this normal for an i7? Should it be completely stressing one core, but not touching any of the others? Am I misunderstanding how processors work? Seems weird for just one core to be stressed all the way to 100%.

What do you think the cause could be for the hiccups mid-game? They are only about .5 seconds long, and am considering what all I should check.

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(This post was last modified: 13/02/2010 07:55 PM by Hellgiver.)
13/02/2010 07:55 PM
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diego
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RE: Only one core at 100%, and hiccups...
well not all games are optimized for multi-core processors right?
I don't know if torchlight is.

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13/02/2010 08:07 PM
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Joom
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RE: Only one core at 100%, and hiccups...
Can't you set how many cores a program uses?

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13/02/2010 08:07 PM
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Hellgiver
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RE: Only one core at 100%, and hiccups...
diego Wrote:well not all games are optimized for multi-core processors right?
I don't know if torchlight is.

But would it cause one core to be completely stressed? I understand that almost no games are optimized for quad core, and most are best on dual core, and that this game is even supposedly perfectly playable on lower end computers, including single cores. Should that core be completely stressed? If it was that stressed (100%), shouldn't it be having more problems?

Joomla12 Wrote:Can't you set how many cores a program uses?

Hmmm, there might be. I'll see if I can find a reference or a program or something.

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(This post was last modified: 13/02/2010 08:16 PM by Hellgiver.)
13/02/2010 08:16 PM
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ZiNgA BuRgA
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RE: Only one core at 100%, and hiccups...
Hellgiver Wrote:But would it cause one core to be completely stressed? I understand that almost no games are optimized for quad core, and most are best on dual core, and that this game is even supposedly perfectly playable on lower end computers, including single cores. Should that core be completely stressed? If it was that stressed (100%), shouldn't it be having more problems?
Yes, because a single threaded application can only run on a single CPU core.
Some older games and applications used busy wait loops to control program flow, so end up always taking up 100% CPU even though most of these are wasted cycles.  Modern apps/games will often "yield" when they don't need the processor.

Hellgiver Wrote:Hmmm, there might be. I'll see if I can find a reference or a program or something.
Process affinity, but I highly doubt that's the issue.

Can't explain the lockups you get though.
13/02/2010 08:47 PM
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Hellgiver
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RE: Only one core at 100%, and hiccups...
Now I'm noticing a lag in execution. It takes me about a minute to even open Torchlight now. I just applied a mod, but tried deleting the mod to see if execution time went back to being instantaneous, but it is continuously taking a minute to start. I'm getting worried... did I miss something when I was trying to troubleshoot all the problems with my computer...?  
* Hellgiver starts to get scared

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13/02/2010 09:52 PM
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Assassinator
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RE: Only one core at 100%, and hiccups...
Does that kind if stuff happen to your other games?
13/02/2010 10:57 PM
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Hellgiver
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RE: Only one core at 100%, and hiccups...
That's what I'm planning to check next. I need to finish obtaining a newly released game, which should be in a day or so. Then I'll be able to look at it with another slightly more independent variable. I'll be able to check soon.

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(This post was last modified: 13/02/2010 11:57 PM by Hellgiver.)
13/02/2010 11:56 PM
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SchmilK
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RE: Only one core at 100%, and hiccups...
Hellgiver Wrote:
diego Wrote:well not all games are optimized for multi-core processors right?
I don't know if torchlight is.

But would it cause one core to be completely stressed? I understand that almost no games are optimized for quad core, and most are best on dual core, and that this game is even supposedly perfectly playable on lower end computers, including single cores. Should that core be completely stressed? If it was that stressed (100%), shouldn't it be having more problems?

Joomla12 Wrote:Can't you set how many cores a program uses?

Hmmm, there might be. I'll see if I can find a reference or a program or something.

Hi, welcome to the reason i quit playing computer games after bashing console games and only playing PC games for the past 20+ years.

Alot of great games just play straight up poorly on multicore computers :(  Infact, Battlefield 2, the game i put in 1000+hours online significantly played worse and worse the faster my computer got :(  Going from a Pentium 4 to AMD X2 to CoreDuo to Core2Duo...each time the game introduce more lag, more loading time, less fps during high action times :(  Each new cpu also got the latest in video cards...which helped less as well :(

Now I say Playstation 3 for m3  :)  (or the wii with the wife :P )

limneosgreen Wrote:Take my advice, don't try to install custom themes ... it's possible to brick ur psp.. why just don't change wallpaper
14/02/2010 07:13 AM
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Assassinator
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RE: Only one core at 100%, and hiccups...
SchmilK Wrote:Hi, welcome to the reason i quit playing computer games after bashing console games and only playing PC games for the past 20+ years.

Alot of great games just play straight up poorly on multicore computers :(  Infact, Battlefield 2, the game i put in 1000+hours online significantly played worse and worse the faster my computer got :(  Going from a Pentium 4 to AMD X2 to CoreDuo to Core2Duo...each time the game introduce more lag, more loading time, less fps during high action times :(  Each new cpu also got the latest in video cards...which helped less as well :(

Now I say Playstation 3 for m3  :)  (or the wii with the wife :P )

It's still illogical, because even if the game is only using 1 core, the processing power of that single core should still be rising (eg. each core of your core2 is more powerful than a core of your old AthlonX2).


I've always been GPU limited, all the way from the start of time to now.
14/02/2010 03:17 PM
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