Hi Aaron, On Jan 16, 2014, at 16:03 , Aaron Wood <wood...@gmail.com> wrote:
> All, > > I'm noting this here in case anyone is interested. After I write this up, > I'm going to start from scratch on the configuration, and factory-reset the > router. > > ===== > > The 5GHz radio on my 3800 seems to be in a very odd state. I'm not quire > sure what state it's in, but it seems to be only doing HT20 1x1. And in a > fairly broken manner at that. > > Running the rrul test (over wifi directly to the router as the netserver), > tcp uploads were 25Mbps or so, but download was 5Mbps. This is with your mac? Try rrul_noclassification, macosx (at least 10.8) will not do RRUL fair to a fast host. Why I do not know… it always prioritizes the upload, as if it did not see/trust the downstream markings (heck maybe it is busy using all bandwidth for upstream so that it literally never sees the markings on the downstream packets..) About the other issue I do not know anything… Best Regards Sebastian > This is me 1-2 meters from the router. Load was never more than 0.33. (I > can share the results of people are interested). > > After a full power cycle, wifi isn't coming up at all. > > ===== > > How I got here: > > > I'm in France, and had dutifully set my unit with the FR country code when > setting up CeroWRT. I had noticed some odd latencies (periodic 100-200ms > latency every 10-20 seconds over wifi) on the 5GHz network. The router was > on channel 36, and I wanted to move it up to the far-upper ranges, so I tried > to specify a "custom" channel to do so (140). This was the channel I thought > I had been using with stock (Netgear) firmware. > > Wifi didn't come back up after applying the changes, and the luci interface > seemed to be tripping up over stuff that it was reading out of the > configuration files. > > I ssh'd in via ethernet, and fixed up the configurations by hand. > > Except the driver is still reporting that the 5GHz network won't kick into > 802.11n modes, and won't use HT40. It seems to be sure it's configured for > it, but isn't using it. > > Further, digging into the rc_stats files with the minstrel speeds, I found > some very odd data (not what I was expecting to see: > > (laptop, which can do 2x2 HT40) > rate throughput ewma prob this prob this succ/attempt success > attempts > D 6 6.0 99.9 100.0 2( 2) 65 > 65 > 9 0.0 0.0 0.0 0( 0) 0 > 0 > 12 2.9 25.0 100.0 0( 0) 1 > 1 > 18 4.3 25.0 100.0 0( 0) 1 > 1 > 24 5.6 25.0 100.0 0( 0) 1 > 1 > A P 36 32.4 99.9 100.0 0( 0) 51 > 51 > C 48 10.4 25.0 100.0 0( 0) 1 > 1 > B 54 11.5 25.0 100.0 0( 0) 1 > 1 > > Total packet count:: ideal 53 lookaround 7 > > (AppleTV, 1x1 HT20) > root@cerowrt:/sys/kernel/debug/ieee80211/phy1/netdev:sw10# cat > stations/58\:55\:ca\:51\:b5\:4b/rc_stats > rate throughput ewma prob this prob this succ/attempt success > attempts > 6 3.5 57.8 100.0 0( 0) 6 > 6 > 9 3.9 43.7 100.0 0( 0) 2 > 2 > 12 5.1 43.7 100.0 0( 0) 2 > 2 > 18 10.0 57.8 100.0 0( 0) 3 > 3 > D 24 13.1 57.8 100.0 0( 0) 3 > 3 > C 36 14.2 43.7 100.0 0( 0) 2 > 2 > B 48 18.2 43.7 100.0 0( 0) 2 > 2 > A P 54 46.2 99.9 100.0 1( 1) 348 > 367 > > Total packet count:: ideal 331 lookaround 37 > > Whereas what I'm seeing for the 2.4GHz radio is: > > root@cerowrt:/sys/kernel/debug/ieee80211/phy0/netdev:sw00/stations# cat > 10\:9a\:dd\:30\:96\:34/rc_stats > type rate throughput ewma prob this prob retry this > succ/attempt success attempts > CCK/LP 1.0M 0.7 100.0 100.0 0 > 0( 0) 2 2 > CCK/SP 2.0M 0.0 0.0 0.0 0 > 0( 0) 0 0 > CCK/SP 5.5M 0.0 0.0 0.0 0 > 0( 0) 0 0 > CCK/SP 11.0M 0.0 0.0 0.0 0 > 0( 0) 0 0 > HT20/LGI MCS0 5.6 100.0 100.0 1 > 0( 0) 2 2 > HT20/LGI MCS1 0.0 0.0 0.0 0 > 0( 0) 0 0 > HT20/LGI MCS2 0.0 0.0 0.0 0 > 0( 0) 0 0 > HT20/LGI MCS3 0.0 0.0 0.0 0 > 0( 0) 0 0 > HT20/LGI MCS4 0.0 0.0 0.0 0 > 0( 0) 0 0 > HT20/LGI MCS5 30.3 100.0 100.0 5 > 0( 0) 1 1 > HT20/LGI t MCS6 32.5 100.0 100.0 5 > 0( 0) 11 11 > HT20/LGI T P MCS7 35.0 100.0 100.0 5 > 6( 6) 34 34 > > Total packet count:: ideal 45 lookaround 3 > Average A-MPDU length: 1.3 > > > And here are radio blocks from the current /etc/config/wireless: > > config wifi-device 'radio1' > option type 'mac80211' > option macaddr '28:c6:8e:bb:9a:49' > list ht_capab 'SHORT-GI-40' > list ht_capab 'TX-STBC' > list ht_capab 'RX-STBC1' > list ht_capab 'DSSS_CCK-40' > option txpower '17' > option distance '25' > option channel '48' > option country 'US' > > config wifi-device 'radio0' > option type 'mac80211' > option hwmode '11ng' > option macaddr '28:c6:8e:bb:9a:47' > option htmode 'HT20' > list ht_capab 'SHORT-GI-40' > list ht_capab 'TX-STBC' > list ht_capab 'RX-STBC1' > list ht_capab 'DSSS_CCK-40' > option txpower '26' > option country 'FR' > option distance '15' > option channel 'auto' > > ====== > > Some notes after having repaired the situation: > > - The pci paths to the radios was missing from /etc/config/wireless, that's > the only thing that I saw that seemed grossly out of place. > > - Back up and running, and yes, it's much happier, now. Over wifi I get > 60-70Mbps upload and ~40Mbps download (running rrul). Latency sucks. Wifi > has some ugly bufferbloat. (although these results are somewhat in question > when the router has a 1m load average over 5.0...) > > - Enabling all the SQM features I was having previously also considerably > cleaned up wifi performance. It's more balanced, but still not nearly as > balanced as I see on gigabit ethernet. > > > > -Aaron > _______________________________________________ > Cerowrt-devel mailing list > Cerowrt-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cerowrt-devel _______________________________________________ Cerowrt-devel mailing list Cerowrt-devel@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/cerowrt-devel