20Apr17 [FreeBSD WIKI]

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====== Transport Meeting 20 Apr 2017 ======

  * We discussed https://reviews.freebsd.org/D10272 as a group and decided that this patch should be accepted.

  * jtl@ opened two reviews for ICMP rate limit code and would like review https://reviews.freebsd.org/D10387 https://reviews.freebsd.org/D10388

  * jtl@ has new code to make the netstat code more efficient and will put up reviews soon

  * gnn@ is going to push on the packetdrill folks to start accepting our changes

  * rrs@ is ready to start putting Rack and BBR code into HEAD.  The code depends on jtl@'s black box code.  

  * gnn@ would like to take a look at the black box code before accepting it into the tree.  rrs@ to follow up with gnn@ on traces and the new UI they've written.

  * rrs@ has structured the inpcb/tcpcb to minimize cache hits on the structures for improved performance.  gnn@ suggests getting those diffs to bz@.  the initial performance improvement numbers are quite promising as they are now serving 97Gbps and maintain 50% free CPU.

  * gnn@ asks about BBR with other workloads.  rrs@ says that they'll be working further to address any sharp edges.

  * gnn@ will make sure there is a Transport session at BSDCan

  * hiren@ is experimenting with avoiding pacing with small files on BBR.

  * glebius@ is continuing his work on improving the performance of listening sockets.  The only sub-system where this might be an issue is SCTP but tuexen@ believes that there is no blocking problem.  https://reviews.freebsd.org/D9770

  * hiren@ asks if the Rack code has jtl@'s long fixes.  jtl@ will check but does point out that they have not seen any issues in the system at %%NetFlix%%.