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From: Lawrence Stewart <lstewart@FreeBSD.org>
Date: Mon, 24 Jan 2011 23:08:38 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sys/modules/khelp Makefile
 src/sys/modules/khelp/h_ertt
 Makefile src/sys/netinet/khelp h_ertt.c h_ertt.h
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lstewart    2011-01-24 23:08:38 UTC

  FreeBSD src repository

  Modified files:
    sys/modules/khelp    Makefile 
  Added files:
    sys/modules/khelp/h_ertt Makefile 
    sys/netinet/khelp    h_ertt.c h_ertt.h 
  Log:
  SVN rev 217806 on 2011-01-24 23:08:38Z by lstewart
  
  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
  
  Revision  Changes    Path
  1.2       +1 -1      src/sys/modules/khelp/Makefile
  1.1       +9 -0      src/sys/modules/khelp/h_ertt/Makefile (new)
  1.1       +545 -0    src/sys/netinet/khelp/h_ertt.c (new)
  1.1       +89 -0     src/sys/netinet/khelp/h_ertt.h (new)