I would really like people to clearly mark when they are using pfifo_fast, codel, and fq_codel.
Secondly, I note that for utterly best results it is useful to ALSO have htb on on ingress to a value only slightly lower than the rate under test, and fq_codel attached to the bin(s) (an example of this is in the deBloat repo on github - both ingress.sh and simple_qos.sh) It would be nice if doing ingress was as simple as egress, maybe using some sort of tbf + fq_codel.... Otherwise for some benchmarks... at 100Mbit, you will see TCP_STREAM behavior holding the line at ~5ms, and TCP_MAERTS being in excess of 30ms, especially when pfifo_fast is on the other side. Or vice versa, depending on where you are running the test. On Tue, May 22, 2012 at 2:22 AM, Rick Jones <rick.jon...@hp.com> wrote: > On 05/21/2012 04:30 PM, Rick Jones wrote: >> >> I think my original ones had the unfortunate effect of putting lines on >> top of one another. Your's seem to put them pretty far apart (at least >> sometimes). We aught to be able to find some reasonable medium in there >> somewhere. I'm thinking if latency is the metric of greatest interest, >> we want that to have the full y axis, and then the peak bandwidth of the >> STREAM test be about half-way up? > > > I've tweaked the bloat.sh script in a couple ways. First, I changed how I > compute the scaling factor, to implement what I described above. Second, I > am using a negative value for the demo interval for the TCP_RR test. This > causes netperf to check if it is time to emit a result after each > transaction rather than after what it thought would be the number of > transactions in the interval. In that way the latency line is much more > robust in the face of a sudden bloating of the path. The effect on > transactions per second should be similar to that of enabling histograms. > An example of a test across my 100 Mbit/s link to a laptop is attached. > > happy benchmarking, > > rick jones > > _______________________________________________ > Codel mailing list > co...@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/codel > -- Dave Täht SKYPE: davetaht US Tel: 1-239-829-5608 http://www.bufferbloat.net _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
