On 2013-04-12 10:27 AM, Rougu wrote: > Hi everyone, > > while I might be totally wrong with my observation, I still would like > to share it, because this issue is lingering for years now and many > users are waiting to a solid grip on it to fix it. > > I'm running several freifunk-nodes in Cologne, Germany, where the > firmware contains a ath9k-watchdog that restarts the node, once the > failure occurs. One of my nodes is affected in varying intervals of 200 > .. 10000 seconds uptime, depending on WLAN activity. > > (openwrt, attitude adjustment, kernel 3.3.8) Please also run a test with OpenWrt trunk and compare stability.
> Looking at "/sys/kernel/debug/ieee80211/phy0/ath9k/xmit", it seems that > MPDUs in the highest priority queue "VO" have a lower rate of > "completion" (90,5%) than those in "BE" (>99,9%). > > From my laymen's perspective I would expect "VO" to have an even better > completion rate than "BE". What you're missing in that perspective is the fact that not all traffic is created equal :) The VO queue carries management traffic. Probe responses frequently end up in XRetry because the number of retries is intentionally limited to 1 (some clients are often either too far away to ACK the probe response, or do not stick around long enough to receive it). > Any chance to see a correlation between WMM priority queue handling and > DMA access problems? No, the data is too limited for that. - Felix _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
