[Codel] hardware hacking on fq_codel in FPGA form at 10GigE

Dave Taht dave.taht at gmail.com
Thu Dec 20 02:28:19 EST 2012

see: http://netfpga.org/

The quad gig-E version looks like it works well (in that there are
advanced things like DRR available for it) but the underlying FPGA is
obsolete. The quad 10GigE version looks sexy but not very functional
as yet. In either case, implementing {n,e,s}fq_codel onboard looks
very feasible, although something of a larger effort than I'd like to
spend personally. (it's been about 6 years since I last touched

I would be interested however in getting a bunch of hardware hackers
together (and getting the academic discount on this board) to try and
do an implementation of a fq_codel derivative on the quad 10GigE
board. (or I would be happy to learn of some group already doing it)

The only thing that is seriously serial about fq_codel is shooting the
biggest flow when the queue limit is exceeded, and that could be made
embarrassingly parallel with enough gates.There are no doubt other
tricky issues.

I would like it if we could match the ns2 model entirely... down to
the last packet... in the real world. I have few contacts at stanford,


There are a couple of other alternatives in the GigE space and below
on openers....

Dave Täht

Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html

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