Sent a pull request but only for setting it globally for TCP so far, as setting
it per-flow and for the UDP packet size was more than I bargained for. :)
The reason I'm probably seeing this more than most people is because I have
non-default settings for `net.ipv4.tcp_wmem` for doing tests on high BDPs.
Being able to set this send size as a test parameter would be useful, because
when I do lower and higher bandwidth tests in the same batch, a setting that
works well at low bandwidths may be too expensive at higher bandwidths. Also
why it would be nice if this "just worked" in netperf.
I'll also be trying plots with delivery rate instead, since that comes from the
kernel, so I may add some more plots to flent with that in it.
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