Package C0; Package C1/C1E; Package C-State Entry And Exit; Coordination Of Core Power States At The Package Level - Intel BX80619I73960X Datasheet

Power Management
Table 4-8.

Coordination of Core Power States at the Package Level

Package C-State
Core 0
Notes:
1. If enabled, the package C-state will be C1E if all actives cores have resolved a core C1 state or higher.
Figure 4-3.

Package C-State Entry and Exit

4.2.5.1

Package C0

The normal operating state for the processor. The processor remains in the normal
state when at least one of its cores is in the C0 or C1 state or when the platform has
not granted permission to the processor to go into a low power state. Individual cores
may be in lower power idle states while the package is in C0.
4.2.5.2

Package C1/C1E

No additional power reduction actions are taken in the package C1 state. However, if
the C1E sub-state is enabled, the processor automatically transitions to the lowest
supported core clock frequency, followed by a reduction in voltage. Autonomous power
reduction actions that are based on idle timers can trigger depending on the activity in
the system.
The package enters the C1 low power state when:
• At least one core is in the C1 state
• The other cores are in a C1 or lower power state
Datasheet, Volume 1
C0
C0
C0
C0
C1
C0
C3
C0
C6
C0
C3
Core 1
C1 C3
C0 C0
1
C1 C1
1
C1 C3
1
C1 C3
C1
C2
C6
C6
C0
1 1
C1
C3
C6
35