Snabb 2016.09 “Zapote” released

[Max Rottenkolber]

Snabb 2016.09 “Zapote” is released. This release changes the way Snabb apps
utilize links to avoid back pressure, and the default ring size was quadrupled.
Most apps no longer avoid overflowing their output links, and therefore
excessive packets will be dropped at the link level instead of being buffered
ad-hoc by apps. The result is that link statistics now reflect actual
congestion, and the performance of the iperf benchmark improved slightly.
Zapote also introduces anti-replay protection as well as logging of auditable
events for lib.ipsec.esp as per RFC 4303, meaning Snabb’s ESP implementation is
closing in being complete. Our vhost_user implementation has seen some major
improvements in both performance and stability. A bug on our side of the
protocol implementation was fixed that was responsible for crashes with some
QEMU versions, and by tweaking how the JIT compiles the vhost_user code the
performance of the Snabb-to-DPDK benchmark was improved substantially. Last but
not least, this release contains miscellaneous bug fixes and improvements.

Release: https://github.com/snabbco/snabb/releases/tag/v2016.09

The next release will be 2016.10 (“Ananas”).