Transport Meeting 04 May 2017

LLNW is going to stick with CUBIC for now and look at which flows should get BBR

gnn@ now has the black box code from jtl@ and rrs@

gleb asks that people actually review https://reviews.freebsd.org/D9770

jtl@ still to verify long fixes are in the Rack code

gnn@ has gotten a session at the DevSummit for the Transport team

tuexen@ wants to finish https://reviews.freebsd.org/D9163]

jegg@ asks about pmcstat when the system is busy, jtl@ has patches to handle per-thread pmc code

jtl@ asks rstone@ about increasing HZ to 10KHz. rstone says this “just works”

kbowling@ says that they have changes for CUBIC which have gone to lstewart@ and will also go to nigel@

rstone@ ask about exposing sbintime() to user space. This would be used in netstat(1) and some socket options such as RTO_MIN and DELACK. The socket options can take a struct timeval, but there is no reason to NOT expose sbintime() to user space.

rstone@ asks about higher frequency time stamps for TX pause in TCP. gnn@ and jtl@ suggest a new TCP option to lower granularity. There is no draft for this as yet. Once this is coded we might write our own draft.