Commit graph

4 commits

Author SHA1 Message Date
Gleb Smirnoff
6df8a71067 Remove SYSCTL_VNET_* macros, and simply put CTLFLAG_VNET where needed.
Sponsored by:	Nginx, Inc.
2014-11-07 09:39:05 +00:00
Lawrence Stewart
8b0fe327e8 Destroy the "qdiffsample_zone" UMA zone on unload to avoid a use-after-unload
panic easily triggered by running "sysctl -a" after unload.

Reported and tested by:	Grenville Armitage <garmitage@swin.edu.au>
MFC after:	1 week
2014-08-19 02:19:53 +00:00
Mikolaj Golub
db2f5a2461 Fixup for r261590 (vnet sysctl handlers cleanup).
Reviewed by:	glebius
2014-02-09 08:13:17 +00:00
Lawrence Stewart
92a0637f73 Import an implementation of the CAIA Delay-Gradient (CDG) congestion control
algorithm, which is based on the 2011 v0.1 patch release and described in the
paper "Revisiting TCP Congestion Control using Delay Gradients" by David Hayes
and Grenville Armitage. It is implemented as a kernel module compatible with the
modular congestion control framework.

CDG is a hybrid congestion control algorithm which reacts to both packet loss
and inferred queuing delay. It attempts to operate as a delay-based algorithm
where possible, but utilises heuristics to detect loss-based TCP cross traffic
and will compete effectively as required. CDG is therefore incrementally
deployable and suitable for use on shared networks.

In collaboration with:	David Hayes <david.hayes at ieee.org> and
		Grenville Armitage <garmitage at swin edu au>
MFC after:	4 days
Sponsored by:	Cisco University Research Program and FreeBSD Foundation
2013-07-02 08:44:56 +00:00