From 7bfbf8dedbdc486f27863cb7d0cc9ea069f2af28 Mon Sep 17 00:00:00 2001
From: lstewart <lstewart@FreeBSD.org>
Date: Mon, 24 Jan 2011 23:08:38 +0000
Subject: Import the ERTT (Enhanced Round Trip Time) Khelp module. ERTT uses
 the Khelp/Hhook KPIs to hook into the TCP stack and maintain a
 per-connection, low noise estimate of the instantaneous RTT. ERTT's
 implementation is robust even in the face of delayed acknowledgements and/or
 TSO being in use for a connection.

A high quality, low noise RTT estimate is a requirement for applications such as
delay-based congestion control, for which we will be importing some algorithm
implementations shortly.

In collaboration with:	David Hayes <dahayes at swin edu au> and
				Grenville Armitage <garmitage at swin edu au>
Sponsored by:	FreeBSD Foundation
Reviewed by:	bz and others along the way
MFC after:	3 months
---
 sys/modules/khelp/Makefile        | 2 +-
 sys/modules/khelp/h_ertt/Makefile | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 sys/modules/khelp/h_ertt/Makefile

(limited to 'sys/modules/khelp')

diff --git a/sys/modules/khelp/Makefile b/sys/modules/khelp/Makefile
index 4dfb082..1901331 100644
--- a/sys/modules/khelp/Makefile
+++ b/sys/modules/khelp/Makefile
@@ -1,5 +1,5 @@
 # $FreeBSD$
 
-SUBDIR=
+SUBDIR=	h_ertt
 
 .include <bsd.subdir.mk>
diff --git a/sys/modules/khelp/h_ertt/Makefile b/sys/modules/khelp/h_ertt/Makefile
new file mode 100644
index 0000000..33d8c7b
--- /dev/null
+++ b/sys/modules/khelp/h_ertt/Makefile
@@ -0,0 +1,9 @@
+# $FreeBSD$
+
+.include <bsd.own.mk>
+
+.PATH: ${.CURDIR}/../../../netinet/khelp
+KMOD=	h_ertt
+SRCS=	h_ertt.c
+
+.include <bsd.kmod.mk>
-- 
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