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PERFBIAS(4)           DragonFly Kernel Interfaces Manual           PERFBIAS(4)


perfbias -- device driver for Intel performance-energy bias support


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


The perfbias driver provides support for Intel performance-energy bias, which allows OS to guide logical CPU heuristic of power management features to favor increasing dynamic performance or conserve energy consumption. Each logical CPU could has its own performance-energy bias setting. MIB Variables Each logical CPU's performance-energy bias is controlled through the machdep.perfbiasX branch of the sysctl(3) MIB. X is the logical CPU id. hint Valid value ranges from 0 to 15, inclusive. Set it to 0 to give the highest performance. Set it to 15 to maximize energy saving.


sysctl(3), sysctl(8) DragonFly 3.7 February 17, 2014 DragonFly 3.7

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