Lines Matching +full:4 +full:- +full:cpu
25 .Dd April 4, 2022
30 .Nd CPU frequency control framework
56 driver provides a unified kernel and user interface to CPU frequency
79 configured P-state.)
87 .Bl -tag -width indent
88 .It Va dev.cpu.%d.freq
89 Current active CPU frequency in MHz.
90 .It Va dev.cpu.%d.freq_driver
93 driver used by this cpu.
94 .It Va dev.cpu.%d.freq_levels
95 Currently available levels for the CPU (frequency/power usage).
103 Lowest CPU frequency in MHz to offer to users.
111 If enabled, the AMD hwpstate driver limits administrative control of P-states
117 P-state, which results in the inability to ever raise the P-state back to P0
126 .Bl -tag -compact -width "hwpstate_intel(4)"
128 ACPI CPU performance states
129 .It Xr est 4
133 .It Xr hwpstate_intel 4
140 Intel SMI-based SpeedStep for PIIX4
146 .Bl -tag -compact -width "acpi_throttle"
148 ACPI CPU throttling
150 Pentium 4 Thermal Control Circuitry
153 Kernel components can query and set CPU frequencies through the
232 Kernel drivers offering hardware-specific CPU frequency control export
242 Additionally, the driver must attach a device as a child of a CPU
254 .Bd -literal
256 int freq; /* CPU clock in MHz or 100ths of a percent. */
295 method returns the currently-active driver setting.
307 .Xr acpi 4 ,
308 .Xr est 4 ,
309 .Xr timecounters 4 ,
322 .Xr longrun 4 .
324 Notification of CPU and bus frequency changes is not implemented yet.