Felix, thanks for taking an interest in this. To answer your questions: Originally I ran the stock Fedora 15 wireless modules from kernel 2.6.38.8-32.fc15.i686. Today I reran the test with the wireless modules from compat-wireless-3.0-rc4-1. Unfortunately there doesn't seem to be any difference. Attached are the summary lines from a 100secon TCP iperf run: ath5k from kernel 2.6.38.8-32.fc15: [ 4] 0.0-100.7 sec 265 MBytes 22.1 Mbits/sec ath5k from compat-wireless-3.0-rc4-1: [ 4] 0.0-100.9 sec 268 MBytes 22.2 Mbits/sec madwifi-0.9.4-r4144-20110602: [ 4] 0.0-100.4 sec 306 MBytes 25.6 Mbits/sec There is obviously little performance change from 2.6.38 to the current 3.0 version of ath5k. And there is a significant performance loss relative to Madwifi. The iperf tests were run in 802.11a (channel 40) in IBSS mode. Similar performance differences were previously observed in AP mode as well. -- Thanks and kind regards Joerg ----- Original Mail ---- > Von: Felix Fietkau <nbd@xxxxxxxxxxx> > An: Joerg Pommnitz <pommnitz@xxxxxxxxx> > CC: linux-wireless@xxxxxxxxxxxxxxx; ath5k-devel@xxxxxxxxxxxxxxx > Gesendet: Sonntag, den 26. Juni 2011, 16:45:29 Uhr > Betreff: Re: [ath5k-devel] Performance regression between Madwifi/net80211 and >ath5k/mac80211 > > On 2011-06-22 5:07 PM, Joerg Pommnitz wrote: > >> I guess you'll need more help from the HW people here. > > > > Bob, Bruno, Felix, Luis, Nick: Do you read? > What mac80211/ath5k version did you use? If you're using the in-kernel ath5k >from 2.6.38, > > then I'd suggest testing with a recent compat-wireless version. I made some >bug fixes and > performance improvements in April - and I think those went into 2.6.39. > > - Felix > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
