diff options
| -rw-r--r-- | share/man/man4/man4.amd64/cpu.4 | 24 | ||||
| -rw-r--r-- | share/man/man4/man4.i386/cpu.4 | 20 |
2 files changed, 36 insertions, 8 deletions
diff --git a/share/man/man4/man4.amd64/cpu.4 b/share/man/man4/man4.amd64/cpu.4 index e9c8597ab07..ed4e089096f 100644 --- a/share/man/man4/man4.amd64/cpu.4 +++ b/share/man/man4/man4.amd64/cpu.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: cpu.4,v 1.2 2007/05/31 19:19:53 jmc Exp $ +.\" $OpenBSD: cpu.4,v 1.3 2007/10/31 16:25:22 jmc Exp $ .\" .\" Copyright (c) 2004 Ted Unangst .\" All rights reserved. @@ -23,7 +23,7 @@ .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" -.Dd $Mdocdate: May 31 2007 $ +.Dd $Mdocdate: October 31 2007 $ .Dt CPU 4 amd64 .Os .Sh NAME @@ -34,7 +34,7 @@ .Cd "cpu* at mainbus?" .Sh DESCRIPTION Several processor models have additional features that extend their base -functionality, such as power and frequency control. +functionality, such as power and frequency control or thermal monitoring. .Sh FREQUENCY CONTROL The .Xr sysctl 3 @@ -42,12 +42,26 @@ hw.cpuspeed will return the current operating frequency of the processor (on some processors this value may be an approximation). If possible, speed may be adjusted by altering hw.setperf from 0 to 100, representing percentage of maximum speed. -There is only one possible implementation for setperf, transparent -to the user: +There are several possible implementations for setperf, all transparent +to the user. .Bl -tag -width tenletters +.It EST +Enhanced SpeedStep found on Intel processors, +offers frequency scaling with numerous positions. .It PowerNow Found on various AMD processors. Currently only supports a limited set of models in the K8 families. .El +.Sh THERMAL MONITORING +The +.Xr sysctl 3 +hw.sensors.cpu*.temp0 will return the current temperature reported by the +processor. .Sh SEE ALSO .Xr sysctl 8 +.Sh BUGS +Due to the way in which thermal information is reported on Intel processors, +the temperature may be off by exactly +/-15 degrees C. +.Pp +For multiprocessor kernels, processors will report identical temperatures +since the temperature is taken from the processor running the sensors update. diff --git a/share/man/man4/man4.i386/cpu.4 b/share/man/man4/man4.i386/cpu.4 index f54fb94ebf4..52896376ba0 100644 --- a/share/man/man4/man4.i386/cpu.4 +++ b/share/man/man4/man4.i386/cpu.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: cpu.4,v 1.13 2007/06/20 14:09:15 jmc Exp $ +.\" $OpenBSD: cpu.4,v 1.14 2007/10/31 16:25:22 jmc Exp $ .\" .\" Copyright (c) 2004 Ted Unangst .\" All rights reserved. @@ -23,7 +23,7 @@ .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" -.Dd $Mdocdate: June 20 2007 $ +.Dd $Mdocdate: October 31 2007 $ .Dt CPU 4 i386 .Os .Sh NAME @@ -33,9 +33,12 @@ .Cd "option I486_CPU" .Cd "option I586_CPU" .Cd "option I686_CPU" +.Pp +.Cd "cpu0 at mainbus?" +.Cd "cpu* at mainbus?" .Sh DESCRIPTION Several processor models have additional features that extend their base -functionality, such as power and frequency control or additional instructions. +functionality, such as power and frequency control or thermal monitoring. .Sh FREQUENCY CONTROL The .Xr sysctl 3 @@ -83,5 +86,16 @@ If this is supported, the .Li libcrypto EVP AES functions will automatically use this support. .El +.Sh THERMAL MONITORING +The +.Xr sysctl 3 +hw.sensors.cpu*.temp0 will return the current temperature reported by the +processor. .Sh SEE ALSO .Xr sysctl 8 +.Sh BUGS +Due to the way in which thermal information is reported on Intel processors, +the temperature may be off by exactly +/-15 degrees C. +.Pp +For multiprocessor kernels, processors will report identical temperatures +since the temperature is taken from the processor running the sensors update. |