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Because of the complexity of modern microprocessors - incorporating [[multi-core microprocessor|multiple]] [[physical core|cores]], [[caches]], and other components, there are multiple C-states depending on which part of the system is talked about. In practice there are usually 3 general C-states:
 
Because of the complexity of modern microprocessors - incorporating [[multi-core microprocessor|multiple]] [[physical core|cores]], [[caches]], and other components, there are multiple C-states depending on which part of the system is talked about. In practice there are usually 3 general C-states:
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Chutiya
  
 
* '''CC-states''' - a set of idle states provided by the hardware controlling the idle states of a physical core.
 
* '''CC-states''' - a set of idle states provided by the hardware controlling the idle states of a physical core.
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[[File:various c-states.svg|450px]]
 
[[File:various c-states.svg|450px]]
 
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Chodu
  
 
The '''OS C-states''' are entirely logical C-state. The OS vendors are free to define what an OS C-state correlates to as they see fit. On some operating systems such as [[Microsoft]] [[Windows]], the logical C-state is fairly  equivalent to the physical core's CC-state. This is usually the case for other [[operating systems]] but it's not a requirement.
 
The '''OS C-states''' are entirely logical C-state. The OS vendors are free to define what an OS C-state correlates to as they see fit. On some operating systems such as [[Microsoft]] [[Windows]], the logical C-state is fairly  equivalent to the physical core's CC-state. This is usually the case for other [[operating systems]] but it's not a requirement.

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