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Add a manpage for the CORE scheduler.

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Xin LI 2006-06-14 02:16:51 +00:00
parent 2c7cae8042
commit 415e46824c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=159594
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1
share/man/man4/Makefile
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@ -272,6 +272,7 @@ MAN= aac.4 \
sbsh.4 \
scc.4 \
sched_4bsd.4 \
sched_core.4 \
sched_ule.4 \
screen.4 \
scsi.4 \

1
share/man/man4/sched_4bsd.4
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@ -60,6 +60,7 @@ on wakeup.
.Pp
Some sysctls will be available only on systems supporting SMP.
.Sh SEE ALSO
.Xr sched_core 4 ,
.Xr sched_ule 4 ,
.Xr sysctl 8
.Sh HISTORY

89
share/man/man4/sched_core.4 Normal file
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@ -0,0 +1,89 @@
.\" Copyright (c) 2006 Xin LI
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd June 14, 2006
.Os
.Dt SCHED_CORE 4
.Sh NAME
.Nm sched_core
.Nd CORE Scheduler
.Sh SYNOPSIS
.Cd "options SCHED_CORE"
.Sh DESCRIPTION
The
.Nm
scheduler
is an experimental scheduler that provides a number of advanced scheduler
features not present in
.Xr sched_4bsd 4 ,
the default system scheduler, nor
.Xr sched_ule 4 where it is forked off.
These features address SMP and interactivity and include:
.Pp
.Bl -bullet -compact -offset indent
.It
Nice value of timesharing processes is respected. Allocation of
timeslice and interaction detection algorithm are based on
nice value.
.It
Per-cpu scheduling queue and load balancing.
.It
O(1) scheduling.
.It
Some cpu affinity code in wakeup path.
.It
Support for POSIX SCHED_FIFO and SCHED_RR.
.El
.Pp
The following sysctls are relevant to the operation of
.Nm :
.Bl -tag -width indent
.It Va kern.sched.name
This read-only sysctl reports the name of the active scheduler.
.It Va kern.sched.imbalance_pct
(SMP specific) Lower watermark that triggers thread migration
if the differce is above this percentage.
.It Va kern.sched.imbalance_pct2
(SMP specific) Higher watermark where the current CPU is not
considered the perferred one for migration.
.El
.Pp
The
.Nm
scheduler
is not enabled by default as it is experimental.
.Sh SEE ALSO
.Xr sched_4bsd 4 ,
.Xr sched_ule 4 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
scheduler first appeared in
.Fx 7.0 .
.Sh AUTHORS
.An David Xu
.Aq davidxu@FreeBSD.org

1
share/man/man4/sched_ule.4
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@ -70,6 +70,7 @@ See the
section for more information.
.Sh SEE ALSO
.Xr sched_4bsd 4 ,
.Xr sched_core 4 ,
.Xr sysctl 8
.Sh HISTORY
The