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est(4) man page update to document the exposed sysctl r/o variables

Browse Source 
available to the user.  Should be applicable to all branches and versions
where est(4) exists.

thanks to gjb for reviewing and suggesting nits

Reviewed by:	gjb@
MFC after:	2 weeks
This commit is contained in:
Sean Bruno 2012-10-18 22:22:01 +00:00
parent f2118deb8c
commit 48f219c0da
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=241710
1 changed files with 25 additions and 2 deletions
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27
share/man/man4/est.4
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@ -25,7 +25,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd June 12, 2012
.Dd October 18 , 2012
.Dt EST 4
.Os
.Sh NAME
@ -63,13 +63,36 @@ behavior.
.Bl -tag -width indent
.It hw.est.msr_info
Attempt to infer information from direct probing of the msr.
Should only be used in diagnostic cases
Should only be used in diagnostic cases.
.Pq default 0
.It hw.est.strict
Validate frequency requested is accepted by the cpu when set.
It appears that this will only work on single core cpus.
.Pq default 0
.El
.Sh SYSCTL VARIABLES
The following
.Xr sysctl 8
values are available
.Bl -tag -width indent
.It Va dev.est.%d.\%desc
Description of support, almost always Enhanced SpeedStep Frequency Control.
.It dev.est.0.%desc: Enhanced SpeedStep Frequency Control
.It Va dev.est.%d.\%driver
Driver in use, always est.
.It dev.est.0.%driver: est
.It Va dev.est.%d.\%parent
.It dev.est.0.%parent: cpu0
The cpu that is exposing these frequencies.
For example
.Va cpu0 .
.It Va dev.est.%d.freq_settings .
The valid frequencies that are allowed by this CPU and their step values.
.It dev.est.0.freq_settings: 2201/45000 2200/45000 2000/39581 1900/37387
1800/34806 1700/32703 1600/30227 1500/28212 1400/25828 1300/23900 1200/21613
1100/19775 1000/17582 900/15437 800/13723
.Pp
.El
.Sh DIAGNOSTICS
.Bl -diag
.It "est%d: <Enhanced SpeedStep Frequency Control> on cpu%d"