happy-joy-joy-making tcp rtt stats cake vs fq_codel and sfq On Wed, Nov 29, 2017 at 3:18 PM, Pete Heist wrote: > http://www.drhleny.cz/bufferbloat/cake/round3/ > > Round 3 Tarball: http://www.drhleny.cz/bufferbloat/cake/round3.tgz > > *** Notes/Analysis *** > > * And another couple hundred tests showing Cake doesn’t crash, at 20/20mbit > either! > > * I’m now using netns (thanks Dave/Georgios) with a five box setup: client, > client router, delay, server router and server. Delay is set up to simulate > a 20mbit/20mbit symmetric connection with “bandwidth 20mbit delay 10ms” on > each of its two interfaces. That apparently doesn’t hard limit the > bandwidth, but no matter, I do get a 20ms RTT as expected, and any tests > with rate limiting use a default limit of 18mbit, which seems to control the > queue well. The unlimited tests can probably be ignored. > > * Now that my CPU can actually run this test, Cake shows good results vs > fq_codel on 32/32 nflows: > > http://www.drhleny.cz/bufferbloat/cake/round3/nflows_32_32_eg_fq_codel_18.0mbit/index.html > http://www.drhleny.cz/bufferbloat/cake/round3/nflows_32_32_eg_cake_18.0mbit/index.html > > * OWD, IPDV (jitter) and lost packets looking good for a VoIP conversation > with dual-whatever. The VoIP conversation is simulated along with a normal > RRUL test (4/4 flows), a torrent, and tcp_12down simultaneously (family of > four?) > > http://www.drhleny.cz/bufferbloat/cake/round3/flowiso_mix_eg_cake_dsrc_cake_ddst_18.0mbit/voip-voip_delay_loss.svg > > *** Round 4 Plans > > * All I can do easily with this setup without more effort is vary rtt, > bandwidth, loss or whatever else netem can do. Or I can add other tests with > spreads of parameters. Sorry, no asymmetric rates or useful ack filtering > tests. Anyone care for high rtt tests, low bandwidth tests like 2/2mbit, or > anything else in particular? > > > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake > -- Dave Täht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619