09Mar17 [FreeBSD WIKI]

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====== Weekly Hangout Notes 09 Mar 2017 ======

  * Update from [[TransportProtocols/23Feb17|last meeting]]: hiren@ is looking into an issue where not going back to slow start causes a lot retransmits. Update: Jason thinks they have a fix?

  * Jason Eggleston reports that draft BBR code from rrs@ results in large end user metrics improvement vs LLNW's current proprietary TCP stack

  * Update from [[TransportProtocols/23Feb17|last meeting]]: Listen sockets. Update: glebius@ sees performance improvement in his tests, waiting for update from jch@

  * gallatin@ reported on his mbuf work. He is working on making mbufs point to an array of buffers. It makes a 20% performance improvement for his workload. But, mtod() loses meaning, which means it will take quite a while to smooth out the rough edges.

  * rrs@ reports a potential problem with parts of the inpcb not being zero'd.

    * glebius@ suggests we also make IPv4 and IPv6 information be anonymous union.

    * glebius@ also suggests that we remove spares from inpcb.

    * Is the inpcb part of the userspace ABI?