Date: Sat, 28 May 2011 08:24:22 +0000 (UTC) From: Lawrence Stewart <lstewart@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r222410 - in stable/8/sys: modules/khelp modules/khelp/h_ertt netinet/khelp Message-ID: <201105280824.p4S8OM2H075253@svn.freebsd.org>
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Author: lstewart Date: Sat May 28 08:24:22 2011 New Revision: 222410 URL: http://svn.freebsd.org/changeset/base/222410 Log: MFC 217806: 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 Added: stable/8/sys/modules/khelp/h_ertt/ - copied from r217806, head/sys/modules/khelp/h_ertt/ stable/8/sys/netinet/khelp/ - copied from r217806, head/sys/netinet/khelp/ Modified: stable/8/sys/modules/khelp/Makefile Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) Modified: stable/8/sys/modules/khelp/Makefile ============================================================================== --- stable/8/sys/modules/khelp/Makefile Sat May 28 08:20:25 2011 (r222409) +++ stable/8/sys/modules/khelp/Makefile Sat May 28 08:24:22 2011 (r222410) @@ -1,5 +1,5 @@ # $FreeBSD$ -SUBDIR= +SUBDIR= h_ertt .include <bsd.subdir.mk>
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