1 files changed, 63 insertions, 0 deletions
diff --git a/static/netbsd/man4/kttcp.4 b/static/netbsd/man4/kttcp.4
new file mode 100644
index 00000000..87b35899
--- /dev/null
+++ b/static/netbsd/man4/kttcp.4
@@ -0,0 +1,63 @@
+.\" $NetBSD: kttcp.4,v 1.5 2008/04/30 13:10:54 martin Exp $
+.\"
+.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
+.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd December 2, 2006
+.Dt KTTCP 4
+.Os
+.Sh NAME
+.Nm kttcp
+.Nd kernel support for testing network throughput
+.Sh SYNOPSIS
+.Cd "pseudo-device kttcp"
+.Sh DESCRIPTION
+This driver provides kernel support for testing network
+throughput from the perspective of the kernel.
+It is similar in spirit to the classic ttcp network benchmark
+program, the main difference being that with kttcp, the kernel is
+the source and sink of the data.
+.Pp
+Testing like this is useful for a few reasons:
+.Bl -enum
+.It
+This allows us to know what kind of performance we can
+expect from network applications that run in the kernel
+space, such as the NFS server or the NFS client.
+These applications don't have to move the data to/from userspace,
+and so benchmark programs which run in userspace don't give us an
+accurate model.
+.It
+Since data received is just thrown away, the receiver is very fast.
+This can provide better exercise for the sender at the other end.
+.It
+Since the
+.Nx
+kernel currently uses a run-to-completion
+scheduling model, kttcp provides a benchmark model where
+preemption of the benchmark program is not an issue.
+.El
+.Sh SEE ALSO
+.Pa pkgsrc/benchmarks/kttcp ,
+.Pa pkgsrc/benchmarks/ttcp