Module Name: src
Committed By: jruoho
Date: Tue Aug 10 02:43:50 UTC 2010
Modified Files:
src/share/man/man4: acpicpu.4
Log Message:
Note the gathered statistics. One CAVEAT down.
To generate a diff of this commit:
cvs rdiff -u -r1.5 -r1.6 src/share/man/man4/acpicpu.4
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/share/man/man4/acpicpu.4
diff -u src/share/man/man4/acpicpu.4:1.5 src/share/man/man4/acpicpu.4:1.6
--- src/share/man/man4/acpicpu.4:1.5 Mon Aug 9 16:13:21 2010
+++ src/share/man/man4/acpicpu.4 Tue Aug 10 02:43:50 2010
@@ -1,4 +1,4 @@
-.\" $NetBSD: acpicpu.4,v 1.5 2010/08/09 16:13:21 jruoho Exp $
+.\" $NetBSD: acpicpu.4,v 1.6 2010/08/10 02:43:50 jruoho Exp $
.\"
.\" Coyright (c) 2010 Jukka Ruohonen <[email protected]>
.\" All rights reserved.
@@ -24,7 +24,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd August 9, 2010
+.Dd August 10, 2010
.Dt ACPICPU 4
.Os
.Sh NAME
@@ -186,6 +186,16 @@
implementation reacts to these events by imposing the dynamic maximum, but
.Nm
does not take any actions to manipulate the frequencies by itself.
+.Ss Statistics
+The
+.Nm
+driver uses event counters to track the times
+a processor has entered a given state.
+It is possible to view the statistics by using
+.Xr vmstat 1
+(with the argument
+.Ar -e ) .
+Note that valid per-CPU data is available only for C-states.
.Sh SEE ALSO
.Xr acpi 4 ,
.Xr cpu_idle 9
@@ -237,11 +247,4 @@
It is only possible to control the
.Tn CPU
frequencies from userland.
-.It
-There are currently no proper ways to export
-statistical and other information from
-.Nm .
-This applies to
-.Tn ACPI
-generally.
.El
