Artesyn ATCA-7480 Installation and Use (February 2015) - Manual (Page 194)

BIOS
ATCA-7480 Installation and Use (6806800T17A) 194
CPU C-State Enabled,
Disabled cpu_cstates Enables processor idle power saving states (C-
States).
Package C State limit C0/C1 state, C2
state, C6 (non
Retention)
state, C6
(Retention)
state, No Limit
cpu_cslimit Specifies the lowest C-state for the package.
Higher C States will save more power, Lower C
States will have lower wake up latencies.
CPU C3 report Enabled,
Disabled cpu_c3 Enables/Disables CPU C3 (ACPI C3) report to
OS.
CPU C6 report Enabled,
Disabled cpu_c6 Enables/Disables CPU C6 (ACPI C3) report to
OS.
Enhanced Halt State
(C1E) Enabled,
Disabled Cpu_c1e Enables the Enhanced C1E state of the CPU
Report ACPI Cx State ACPI C2, ACPI
C3 cpu_cxacpi Report CPU C3/C6 state to OS as ACPI C2 or
ACPI C3 state.
Table 6-8 Advanced >> Processor Configuration >> Processor Power Management Configuration (continued)
Item Values IPMI Boot parameter Description