====== Weekly Hangout 21 April 2016 ======

  * Possibly issue with /32 vs. /24 wrt route caching from (net@) - UPDATE (hiren 04/21/2016 13:04 PDT) It turned out to be something broken with lacp/lagg and not route caching.

  * UDPv6 might also need the route caching changes as well.  UDPv4 seems to be holding the lock longer now as well.

  * LLNW is looking at building out a client device lab.  A hot issue has to do with under performance with a specific test where streams have .1% packet packet loss.  Start with .1% and increment by .1%.  Time to first re-buffer is the measurement.  They will share results once they have them.

  * The patch from jtl@ does not solve all the underflow problems but does solve some of them.  Hiren is looking at tcp_send_probe() at the end of tcp_output().  Hiren will continued to dig into this.

  * Any thoughts on Hiren's cwnd patch?  Has not tried it in production but Randall said that dropping to 1 was better for his test than dropping to 1/2.  

  * Hiren has a patch that enables the pipe calculation and cwnd via a sysctl.  He will put that into Phabricator and then eventually in HEAD.  This will make it interact correctly with RFC 6675.

  * Kevin will start getting data collection at their edge.  He believes that they will have that soon.

  * George has started working with a group on a set of protocol conformance tests which ought to be open sourced in the near future and which cover the layers from NICs up to TCP.

  * Michael has an updated version of the packetdrill port which he will point us at so that George can update the port.