1.\" (c) Copyright 2010 by Matthew Dillon and Dima Ruban. Permission to 2.\" use and distribute based on the DragonFly copyright. 3.\" 4.Dd October 28, 2014 5.Dt POWERD 8 6.Os 7.Sh NAME 8.Nm powerd 9.Nd simple ACPI based CPU/power control 10.Sh SYNOPSIS 11.Nm 12.Op Fl dt 13.Op Fl p Ar hysteresis 14.Op Fl u Ar trigger_up 15.Sh DESCRIPTION 16The 17.Nm 18daemon monitors the CPU load and automatically adjusts the CPU 19frequency up or down. 20.Pp 21All CPUs will be set to their maximum frequency when the 1 second 22machine load exceeds 25% of one CPU. 23All CPUs will be set to their 24minimum frequency when the 10 second machine load drops below 12% of 25one CPU. 26.Pp 27The options are as follows: 28.Bl -tag -width ".Fl p Ar hysteresis" 29.It Fl d 30Debug option. 31Causes 32.Nm 33to not go to the background and prints some debug output to 34.Va stdout . 35.It Fl p Ar hysteresis 36Percent of the upper limit to subtract as an hysteresis value to scale 37down to the min frequency. 38.It Fl t 39Turbo mode. 40Disables switching to turbo mode as maximum frequency completely. 41Switching to turbo mode as maximum frequency is enabled by default, 42if the CPU supports it. 43.It Fl u Ar trigger_up 44Per CPU load limit in percent to force maximum frequency. 45.El 46.Sh DIAGNOSTICS 47The 48.Nm 49utility will exit with a non-zero code if the required sysctls are not 50present. 51.Sh SEE ALSO 52.Xr acpi 4 , 53.Xr est 4 , 54.Xr powernow 4 55.Sh HISTORY 56The 57.Nm 58command first appeared in 59.Dx 2.7 . 60.Sh BUGS 61I'm shocked I tell you, shocked that there might be bugs in this program! 62