Snabb lwAFTR 2019.06.01

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-2018.09.03
+2019.06.01

src/program/lwaftr/doc/CHANGELOG.md

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 # Change Log
 
+## [2019.06.01]
+
+### Notable changes
+
+ * Improve stability of receive-side scaling (RSS), in which multiple
+   CPU cores can service traffic on the same NIC.  Previously, the
+   lwAFTR had a pathology whereby a transient error condition that could
+   cause one core to drop packets could then cause another core to
+   attempt to perform self-healing by re-optimizing its code, which
+   could then ping-pong back and cause the other core to try to
+   self-heal, and on and on forever.  See
+   https://github.com/Igalia/snabb/pull/1229 and
+   https://github.com/snabbco/snabb/pull/1443 for more details.
+
+ * Fix a problem whereby `snabb config add` would cause the lwAFTR to
+   crash after a few thousand softwire additions.  See
+   https://github.com/Igalia/snabb/pull/1228.
+
+ * Update the `ieee-softwire` compatibility layer for the native
+   `snabb-softwire-v2' Yang module, corresponding the latest changes in
+   the Internet Draft, `draft-ietf-softwire-yang-16`.
+
+ * Add counters and historical data records for how much memory a lwAFTR
+   process uses over time, for use in on-line and post-mortem system
+   diagnostics.  See https://github.com/Igalia/snabb/pull/1228 for
+   details.
+
+ * Add `snabb rrdcat` tool that can be used to identify when packet
+   drops occured in the past.  See
+   https://github.com/Igalia/snabb/pull/1225 for details.
+
+ * Incorporate changes from the upstream Snabb 2019.06 "Deltadromeus"
+   release.  This finally includes a switch over to RaptorJIT, which
+   adds a number of on-line diagnostic tools that can be useful for
+   troubleshooting performance problems in production.
+
 ## [2018.09.03]
 
 ### Features