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Date: Tue, 04 Mar 2014 19:14:02 +0700
From: Eugene Grosbein <egrosbein@rdtc.ru>
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To: Adrian Chadd <adrian.chadd@gmail.com>
Subject: Re: UDP transmit and no flowid
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On 04.03.2014 08:17, Adrian Chadd wrote:

> I'll try this out in the next week or two once I've sorted out my
> employment situation and I can reserve some time on the netperf
> cluster.

There is a patch written by melifaro@freebsd.org to introduce
IP flow id generation and modified by me to add sysctl
net.inet.ip.skip_flowid_gen to disable id generation in run time
and return pre-patched behavior:

http://www.grosbein.net/freebsd/patches/netisr_ip_flowid.diff

I've tested it in production for mpd5-based high loaded BRAS, it works just fine.
It uses IP src/dst addresses and TCP/UDP/SCTP ports to feed jenkins_hashword()
and to fill m->m_pkthdr.flowid.

Eugene Grosbein.