Add a manpage for the CORE scheduler.

4 files changed, 92 insertions, 0 deletions

diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index 410c2b7..b1b8654 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -272,6 +272,7 @@ MAN=	aac.4 \
 	sbsh.4 \
 	scc.4 \
 	sched_4bsd.4 \
+	sched_core.4 \
 	sched_ule.4 \
 	screen.4 \
 	scsi.4 \
diff --git a/share/man/man4/sched_4bsd.4 b/share/man/man4/sched_4bsd.4
index 5ffaa0c..a46f1b2 100644
--- a/share/man/man4/sched_4bsd.4
+++ b/share/man/man4/sched_4bsd.4
@@ -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
diff --git a/share/man/man4/sched_core.4 b/share/man/man4/sched_core.4
new file mode 100644
index 0000000..3be846c
--- /dev/null
+++ b/share/man/man4/sched_core.4
@@ -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
diff --git a/share/man/man4/sched_ule.4 b/share/man/man4/sched_ule.4
index b73e956..a57bae3 100644
--- a/share/man/man4/sched_ule.4
+++ b/share/man/man4/sched_ule.4
@@ -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