Cisco Systems UCSCPCIEBTG, 57712 manual Processor C6 Report, Package C State Limit, CPU C State

BIOS Parameters by Server Model

Advanced BIOS Parameters for C260 Servers

Name	Description
Processor C6 Report	Whether the BIOS sends the C6 report to the operating system.
	When the OS receives the report, it can transition the processor
	into the lower C6 power state to decrease energy usage while
	maintaining optimal processor performance. This can be one of
	the following:
	• Disabled—The BIOS does not send the C6 report.
	• Enabled—The BIOS sends the C6 report, allowing the
		OS to transition the processor to the C6 low power state.
Package C State Limit	The amount of power available to the server components when
	they are idle. This can be one of the following:
	• —The server provides all server components with full
		power at all times. This option maintains the highest level
		of performance and requires the greatest amount of power.
	• —When the CPU is idle, the system slightly reduces the
		power consumption. This option requires less power than
		C0 and allows the server to return quickly to high
		performance mode.
	• —When the CPU is idle, the system reduces the power
		consumption further than with the C1 option. This requires
		less power than C1 or C0, but it takes the server slightly
		longer to return to high performance mode.
	• —When the CPU is idle, the system reduces the power
		consumption further than with the C3 option. This option
		saves more power than C0, C1, or C3, but there may be
		performance issues until the server returns to full power.
	• —When the CPU is idle, the server makes a minimal
		amount of power available to the components. This option
		saves the maximum amount of power but it also requires
		the longest time for the server to return to high
		performance mode.
	• —The server may enter any available C state.
	Note	This option is used only if CPU C State is
		enabled.
CPU C State	Whether the system can enter a power savings mode during idle
	periods. This can be one of the following:

• Disabled—The system remains in high performance state even when idle.

• Enabled—The system can reduce power to system components such as the DIMMs and CPUs. The amount of power reduction is specified .

	Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
226	OL-28893-01