src-test2/sys/modules/khelp, branch release/11.4.0

MFC r314651,r318439,r318440:

2017-05-30T04:11:12Z

r314651: sys/modules: normalize .CURDIR-relative paths to SRCTOP This simplifies make output/logic Tested with: `cd sys/modules; make ALL_MODULES=` on amd64 r318439: Normalize .PATH on SRCTOP This will help Jenkins dedupe 9 warnings between the static build and the module build of ipsec(4). Missed in SRCTOP conversion in r314651. MFC with: r314651 r318440: Normalize SYSDIR on SRCTOP instead of .CURDIR This is being done to simplify pathing for CFLAGS and source files.

Remove unnecessary inclusions of bsd.own.mk.

2014-08-04T22:34:12Z

Import the ERTT (Enhanced Round Trip Time) Khelp module. ERTT uses the

2011-01-24T23:08:38Z

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 and Grenville Armitage Sponsored by: FreeBSD Foundation Reviewed by: bz and others along the way MFC after: 3 months

Add build infrastructure for Khelp modules.

2011-01-24T07:50:29Z

Sponsored by: FreeBSD Foundation Reviewed by: bz MFC after: 3 months