Date: Sun, 20 Aug 2000 18:49:46 -0700 (PDT) From: freedom@csie.nctu.edu.tw To: freebsd-gnats-submit@FreeBSD.org Subject: docs/20738: correction and modification to clocks(7) Message-ID: <20000821014946.ABCA837B422@hub.freebsd.org>
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>Number: 20738
>Category: docs
>Synopsis: correction and modification to clocks(7)
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-doc
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: doc-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Aug 20 18:50:04 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Tan Koan-Sin
>Release: 5-current
>Organization:
NCTU, Taiwan
>Environment:
FreeBSD dhcp235-1.csie.nctu.edu.tw 5.0-CURRENT FreeBSD 5.0-CURRENT #49: Thu Aug 17 00:15:08 CST 2000 freedom@ThinkPad:/usr/src/sys/compile/ThinkPad i386 mc146818A is writtend as mc14618a. That should be corrected.
And some description are added to i8254 and TSC.
>Description:
mc146818A is writtend as mc14618a. That should be corrected.
And some description are added to i8254 and TSC.
>How-To-Repeat:
>Fix:
*** clocks.7.old Sun Jul 30 10:53:34 2000
--- clocks.7 Mon Aug 21 06:32:11 2000
***************
*** 102,108 ****
.Xr sysctl 3
or by reading it from the header in the profiling data file.
.It
! The mc14618a clock. This is a real clock with a nominal frequency of
32768. It is divided down to give the statistic clock and the profiling
clock. It isn't available to applications.
.It
--- 102,108 ----
.Xr sysctl 3
or by reading it from the header in the profiling data file.
.It
! The mc146818A clock. This is a real clock with a nominal frequency of
32768. It is divided down to give the statistic clock and the profiling
clock. It isn't available to applications.
.It
***************
*** 113,132 ****
.Xr gettimeofday 2 ,
.Xr select 2 ,
.Xr getitimer 2 ,
! etc... This is the clock that should normally be used
! by BSD applications.
.It
The i8254 clock. This is a real clock/timer with a nominal frequency of
! 1193182. It is divided down to give the scheduling clock. It isn't
! available to applications.
.It
The TSC clock (64-bit register) on fifth-generation or later x86 systems.
This is a real clock with a frequency that is equivalent to the number of
cycles per second of the CPU(s).
! Its frequency can be found using the sysctl
! .Sy machdep.tsc_freq .
It is used to interpolate between values of the scheduling clock.
! It is only available to applications in a purely machine-dependant manner.
.El
.Pp
Summary: if
--- 113,136 ----
.Xr gettimeofday 2 ,
.Xr select 2 ,! etc... It could be implemented by the i8254 clock or the TSC clock.
! This is the clock that should normally be used by BSD applications.
.It
The i8254 clock. This is a real clock/timer with a nominal frequency of
! 1193182. It has three independent time counters to be used. It
! is divided down to give the scheduling clock. It isn't available
! to applications.
.It
The TSC clock (64-bit register) on fifth-generation or later x86 systems.
This is a real clock with a frequency that is equivalent to the number of
cycles per second of the CPU(s).
! Its frequency can be found using the sysctl
! .Sy machdep.tsc_freq ,
! if it is available.
It is used to interpolate between values of the scheduling clock.
! It could be accessed via PMIOTSTAMP request of
! .Xr perfmon 4 .
!
.El
.Pp
Summary: if
***************
*** 140,146 **** .Xr select 2 ,
.Xr clock 3 ,
.Xr moncontrol 3 ,
! .Xr times 3
.Sh AUTHORS
This man page has been written by
.ie t J\(:org Wunsch
--- 144,151 ----
.Xr select 2 ,
.Xr clock 3 ,
.Xr moncontrol 3 ,
! .Xr times 3 ,
! .Xr perfmon 4
.Sh AUTHORS
This man page has been written by
.ie t J\(:org Wunsch
.Xr getitimer 2 ,
>Release-Note:
>Audit-Trail:
>Unformatted:
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