B&R Automation PC 3100 User Manual page 154

Software
BIOS parameter
Platform PL1 time window
Platform PL2 enable
Platform PL2 power
Power limit 4 override
Power limit 4
Power limit 4 lock
C states
6)
Thermal monitor
Power limit 3 settings
Table 173: Advanced - Power & Performance - CPU power management control
1) Intel Speed Shift Technology enables hardware-controlled P-states via the CPPC (Collaborative Processor Performance Control) v2 interface.
2) Hardware duty cycling
3) This submenu appears only if the Intel® Speed Shift Technology option is enabled.
4) For all power limits (PL1 to PL4), the additional description on the display unit must be observed. All values must be entered in mW.
5) The default value 0 for this table means that pre-programmed default values are used. The system does not use the numeric value 0.
6) The C-states options are described separately in the following table to maintain clarity.
BIOS setting
Enhanced C-states
C-state auto demotion
C-state un-demotion
Package C-state demotion
Package C-state un-demotion
CState pre-wake
IO MWAIT redirection
Package C-state limit
C3 latency control (MSR 0x60A)
Time unit
Latency
C6/C7 short latency control (MSR 0x60B)
Time unit
Table 174: Advanced - Power & Performance - CPU power management control - C-states
154
Setting options Description
INT Defines the platform PL1 time window [s]
Default: 0 Range: 0 to 128
Disabled Disables/Enables platform power limit (PL2) programming
Enabled
INT Defines the platform PL1 power limit [mW]
Default: 0 Range: 0 to 4095875
Resolution: 1/8
Disabled Disables/Enables the power limit 4 override
Enable to set values for power limit 4 manually; otherwise, the system default values
Enabled
are used.
INT Defines PL4 power limit 4 [mW]
Default: 0 Range: 0 to 4095875
Resolution: 1/8
Disables/Enables the power limit 4 lock function
Disabled
This can be used to lock the PL4 configuration when using an operating system.
Enabled
Disabled Disables/Enables CPU C-states management
Enabled
Disabled Disables/Enables temperature monitoring
Enabled
Enter Opens submenu
Configuration op- Explanation
tions
Disabled Disables/Enables enhanced C-states (C1E)
The CPU switches to the lowest speed level if all cores are in a C-state.
Enabled
C1 Selects or disables C-state auto-demotion
Can be used to prevent unnecessary changing of C-states.
C1 and C3
C3
Disabled
C1 Selects or disables C-state un-demotion
C1 and C3
C3
Disabled
Auto Disables/Enables package C-state demotion or sets it automatically
Disabled
Enabled
Auto Disables/Enables package C-state un-demotion or sets it automatically
Disabled
Enabled
Disabled Disables/Enables CState pre-wake
Enabled
Disabled Disables/Enables I/O MWAIT redirection
Enabled
Auto Selects package C-state limits, sets it automatically (lowest available state selected) or
the CPU default (default C-state of the CPU)
CPU default
C10 C9 optimized VR off
C9 C8 + VR off
C8 C7 + PCH off
C7S Optimized deeper power down
C7 Deeper power down
C6 Deep power down
C3 Deep sleep
C2 Stop clock
C0/C1 Operating mode/halt
1 ns Select the IRTL
32 ns
1024 ns
32768 ns
1048576 ns
33554432 ns
INT Defines the IRTL value
Default: 78 Range: 0 to 1023
1 ns Selects the IRTL time unit [ns]
32 ns
Automation PC 3100 User's manual V 1.00 Translation of the original documentation
"Power limit 3 settings" on page 156
time unit [ns]
1)