Package C-State Support; Core C-State Support - Intel BX80619I73960X Datasheet

Table 4-3
Table 4-2.

Package C-State Support

Package C-State
PC0 – Active
PC2 – Snoopable
Idle
PC3 – Light
Retention
PC6 – Deeper
Retention
Notes:
1. Package C7 is not supported.
2. All package states are defined to be "E" states – such that they always exit back into the LFM point upon
execution resume.
3. The mapping of actions for PC3, and PC6 are suggestions – microcode will dynamically determine which
actions should be taken based on the desired exit latency parameters.
4. CC3/CC6 will all use a voltage below the VccMin operational point. The exact voltage selected will be a
function of the snoop and interrupt response time requirements made by the devices (PCIe* and DMI) and
the operating system.
Table 4-3.

Core C-State Support

Core C-State
CC0
CC1
CC1E
CC3
CC6
CC7
28
lists the processor core C-states support.
Core
States
CC0 N/A
• PCIe/PCH and Remote Socket
Snoops
• PCIe/PCH and Remote Socket
Accesses
CC3–CC7
• Interrupt response time
requirement
• DMI Sidebands
• Configuration Constraints
• Core C-state
at least
• Snoop Response Time
one Core
• Interrupt Response Time
in C3
• Non Snoop Response Time
• LLC ways open
• Snoop Response Time
CC6–CC7
• Non Snoop Response Time
• Interrupt Response Time
Global Clock
Running
Stopped
Stopped
Stopped
Stopped
Stopped
Limiting Factors
PLL L1/L2 Cache
On Coherent
On Coherent
On Coherent
On Flushed to LLC
On Flushed to LLC
Off Flushed to LLC
Power Management
LLC
Retention and
Fully
PLL-Off
Flushed
No No
VccMin
Freq = MinFreq No
PLL = ON
Vcc = retention
No
PLL = OFF
Vcc = retention
No
PLL = OFF
Core VCC Context
Active Maintained
Active Maintained
Request LFM Maintained
Request Retention Maintained
Power Gate Flushed to LLC
Power Gate Flushed to LLC
Datasheet, Volume 1
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Notes
2
2
2,3,4
2,3,4