I'm running 7-CURRENT on several ALIX 3c2 boards with SR9 radios and having major performance problems: throughput on TCP streams generated by iperf often falls to zero, and, depending on the HAL I use, I see ping latencies during one of these iperf transfers of up to more than a *minute*. I've tried both the 0.9.30.13 HAL and the new 0.10.5.6 HAL. I see this bad behavior with both, but the new HAL seems even worse. I've documented my configuration and the test results at http://www.eecs.harvard.edu/~mainland/freebsd/sr9/. This includes the kernel configuration, dmesg output, pciconf output, rc.conf, statistics collected from the ath driver, appropriate sysctl values, iperf/ping output generated by my driver script and some plots showing the problem. We are trying to deploy a bunch of these nodes outdoors, using the 900MHz radios as a backhaul, so the drop-outs I see with SR9s are a major problem for us. I've also run the same tests on Soekris nodes, used different SR9s, and also tried the new XR9s on the same ALIX boards---all with similar results. We also have a bunch of Wistrom CM9s which seem to work just fine. Any idea what could be going on? How-To-Repeat: I see this pattern of behavior with both XR9s and SR9s. It also happens on Soekris 4826 motherboards.
Responsible Changed From-To: freebsd-bugs->freebsd-net Over to maintainer(s).
Responsible Changed From-To: freebsd-net->freebsd-wireless change resp. to new mailing list
batch change: For bugs that match the following - Status Is In progress AND - Untouched since 2018-01-01. AND - Affects Base System OR Documentation DO: Reset to open status. Note: I did a quick pass but if you are getting this email it might be worthwhile to double check to see if this bug ought to be closed.