DragonFly On-Line Manual Pages

EST(4)		      DragonFly Kernel Interfaces Manual		EST(4)


est -- Enhanced SpeedStep Technology support


To compile this driver into the kernel, place the following line in your kernel configuration file: options CPU_ENABLE_EST To load this driver as a module at boot time, place the following line in loader.conf(5): est_load="YES"


The est driver provides support for the Enhanced SpeedStep Technology present in newer CPUs. If the CPU is supported est creates the following variables in the machdep.est branch of the sysctl(3) MIB. frequency.available The list of frequencies supported by est for the CPU (read only). frequency.current The current CPU frequency (read only). frequency.target The target CPU frequency (read/write). An associated userland daemon which is part of the pkgsrc(7) collection (sysutils/estd) can be used to dynamically set the CPU frequency depend- ing on utilization.


The est driver first appeared in DragonFly 1.5. DragonFly 3.7 March 17, 2011 DragonFly 3.7