Re: [B.A.T.M.A.N.] batman-adv and 11n speed
Elektra, You're correct. I disabled batman-adv, the speed will still return to 11g after a second IBSS board is up. that has something to do with rate-discovery-under-IBSS for mac80211/ath9k I think. thanks, xxiao --- On Mon, 7/6/09, elektra wrote: > From: elektra > Subject: Re: [B.A.T.M.A.N.] batman-adv and 11n speed > To: austinxxh-at...@yahoo.com, "The list for a Better Approach To Mobile > Ad-hoc Networking" > Date: Monday, July 6, 2009, 2:43 PM > Hi xxiao - > > I guess your problem is not related to batman-adv - I would > plea not > guilty unless proven otherwise. This looks like a > driver issue. > > Batman doesn't force your driver to use a certain 802.11 > mode or rate. > It does send protocol messages as broadcasts of course, and > those are > usually sent at basic rate. > > Did you actually test performance in IBSS mode without > batman-adv > running? > > Ath9k is pretty new and my guess is that the driver hasn't > experienced > much testing in IBSS mode. > > I'd like to suggest that you test the following: > > Restart your wireless interfaces, set up IBSS mode. Don't > start > batman-adv. > > Send broadcasts (by sending ping to the networks broadcast > address for > example) and check if the driver reports the same behaviour > or not. > > Cheers, > Elektra > > > > > I'm using Openwrt/compat-wireless-2009-06-25 on a > AR7161 board. I'm using ath9k trying to get 11n speed for > batman-adv working. All code is from openwrt trunk. > > > > >From the debugfs of mac80211/ath9k, I can see > under IBSS mode, the rcstat reports speed up to 300mbps. I > have batman-adv enabled. > > > > However after a second board with the same software > booted up, both boards' rcstat output showed a speed of 11g > only, an immediate drop from 11n to 11g. It's like the > second batman-adv somehow forced a 11g speed after it > "talked" to the first batman-adv board. > > > > Any help is appreciated! > > xxiao > > > > > > Before the second batman-adv is booted up: > > r...@openwrt:/# cat /mnt/ath9k/phy0/rcstat > > Rate > Success Retries XRetries PER > > > > 1.0: > 0 0 > 0 0 > > 2.0: > 0 0 > 0 0 > > 5.5: > 0 0 > 0 0 > > 11.0: 0 > 0 0 > 0 > > 6.0: > 0 0 > 0 0 > > 9.0: > 0 0 > 0 0 > > 12.0: 0 > 0 0 > 0 > > 18.0: 0 > 0 0 > 0 > > 24.0: 0 > 0 0 > 0 > > 36.0: 0 > 0 0 > 0 > > 48.0: 0 > 0 0 > 0 > > 54.0: 0 > 0 0 > 0 > > 6.5: > 0 0 > 0 0 > > 13.0: 0 > 0 0 > 0 > > 19.5: 0 > 0 0 > 0 > > 26.0: 0 > 0 0 > 0 > > 39.0: 0 > 0 0 > 0 > > 52.0: 0 > 0 0 > 0 > > 58.5: 0 > 0 0 > 0 > > 65.0: 0 > 0 0 > 0 > > 13.0: 0 > 0 0 > 0 > > 26.0: 0 > 0 0 > 0 > > 39.0: 0 > 0 0 > 0 > > 52.0: 0 > 0 0 > 0 > > 78.0: 0 > 0 0 > 0 > > 104.0: 0 > 0 0 > 0 > > 117.0: 0 > 0 0 > 0 > > 130.0: 0 > 0 0 > 0 > > 13.5: 0 > 0 0 > 0 > > 27.5: 0 > 0 0 > 0 > > 40.5: 0 > 0 0 > 0 > > 54.0: 0 > 0 0 > 0 > > 81.5: 0 > 0 0 > 0 > > 108.0: 0 > 0 0 > 0 > > 121.5: 0 > 0 0 > 0 > > 135.0: 0 > 0 0 > 0 > > 150.0: 0 > 0 0 > 0 > > 27.0: 0 > 0 0 > 0 > > 54.0: 0 > 0 0 > 0 > > 81.0: 0 > 0 0 > 0 > > 108.0: 0 > 0 0 > 0 > > 162.0: 0 > 0 0 > 0 > > 216.0: 0 > 0 0 > 0 > > 243.0: 0 > 0 0 > 0 > > 270.0: 0 > 0 0 > 0 > > 300.0: 0 > 0 0 > 0 > > > > after the second batman-adv is up: > > r...@openwrt:/# cat /mnt/ath9k/phy0/rcstat > > Rate > Success Retries XRetries PER > > > > 1.0: > 0 0 > 0 0 > > 2.0: > 0 0 > 0 0 > > 5.5: > 0 0 > 0 0 > > 11.0: 0 > 0 0 > 0 > > 6.0: > 0 0 > 0 0 > > 9.0: > 0 0 > 0 0 > > 12.0: 0 > 0 0 > 0 > > 18.0: 0 > 0
Re: [B.A.T.M.A.N.] batman-adv and 11n speed
Hi xxiao - I guess your problem is not related to batman-adv - I would plea not guilty unless proven otherwise. This looks like a driver issue. Batman doesn't force your driver to use a certain 802.11 mode or rate. It does send protocol messages as broadcasts of course, and those are usually sent at basic rate. Did you actually test performance in IBSS mode without batman-adv running? Ath9k is pretty new and my guess is that the driver hasn't experienced much testing in IBSS mode. I'd like to suggest that you test the following: Restart your wireless interfaces, set up IBSS mode. Don't start batman-adv. Send broadcasts (by sending ping to the networks broadcast address for example) and check if the driver reports the same behaviour or not. Cheers, Elektra > I'm using Openwrt/compat-wireless-2009-06-25 on a AR7161 board. I'm using > ath9k trying to get 11n speed for batman-adv working. All code is from > openwrt trunk. > > >From the debugfs of mac80211/ath9k, I can see under IBSS mode, the rcstat > >reports speed up to 300mbps. I have batman-adv enabled. > > However after a second board with the same software booted up, both boards' > rcstat output showed a speed of 11g only, an immediate drop from 11n to 11g. > It's like the second batman-adv somehow forced a 11g speed after it "talked" > to the first batman-adv board. > > Any help is appreciated! > xxiao > > > Before the second batman-adv is booted up: > r...@openwrt:/# cat /mnt/ath9k/phy0/rcstat > Rate Success Retries XRetries PER > > 1.0:0000 > 2.0:0000 > 5.5:0000 > 11.0:0000 > 6.0:0000 > 9.0:0000 > 12.0:0000 > 18.0:0000 > 24.0:0000 > 36.0:0000 > 48.0:0000 > 54.0:0000 > 6.5:0000 > 13.0:0000 > 19.5:0000 > 26.0:0000 > 39.0:0000 > 52.0:0000 > 58.5:0000 > 65.0:0000 > 13.0:0000 > 26.0:0000 > 39.0:0000 > 52.0:0000 > 78.0:0000 > 104.0:0000 > 117.0:0000 > 130.0:0000 > 13.5:0000 > 27.5:0000 > 40.5:0000 > 54.0:0000 > 81.5:0000 > 108.0:0000 > 121.5:0000 > 135.0:0000 > 150.0:0000 > 27.0:0000 > 54.0:0000 > 81.0:0000 > 108.0:0000 > 162.0:0000 > 216.0:0000 > 243.0:0000 > 270.0:0000 > 300.0:0000 > > after the second batman-adv is up: > r...@openwrt:/# cat /mnt/ath9k/phy0/rcstat > Rate Success Retries XRetries PER > > 1.0:0000 > 2.0:0000 > 5.5:0000 > 11.0:0000 > 6.0:0000 > 9.0:0000 > 12.0:0000 > 18.0:0000 > 24.0:0000 > 36.0:0000 > 48.0:0000 > 54.0:0000 > > On both boards I have this: > r...@openwrt:/# iwconfig > lono wireless extensions. > > eth0 no wireless extensions. > > eth1 no wireless extensions. > > br-lanno wireless extensions. > > wlan0 IEEE 802.11abgn ESSID:"xyz" > Mode:Ad-Hoc Frequency:2.432 GHz Cell: 92:46:0A:A3:8B:39 > Tx-Power=27 dBm > Retry long limit:7 RTS thr:off Fragment thr:off > Encryption key:off > Power Management:off > Link Quality:0 Signal level:0 Noise level:0 > Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 > Tx excessive retries:0 Invalid misc:0 Missed beacon:0 > > bat0 no
[B.A.T.M.A.N.] batman-adv and 11n speed
Hi, I'm using Openwrt/compat-wireless-2009-06-25 on a AR7161 board. I'm using ath9k trying to get 11n speed for batman-adv working. All code is from openwrt trunk. >From the debugfs of mac80211/ath9k, I can see under IBSS mode, the rcstat >reports speed up to 300mbps. I have batman-adv enabled. However after a second board with the same software booted up, both boards' rcstat output showed a speed of 11g only, an immediate drop from 11n to 11g. It's like the second batman-adv somehow forced a 11g speed after it "talked" to the first batman-adv board. Any help is appreciated! xxiao Before the second batman-adv is booted up: r...@openwrt:/# cat /mnt/ath9k/phy0/rcstat Rate Success Retries XRetries PER 1.0:0000 2.0:0000 5.5:0000 11.0:0000 6.0:0000 9.0:0000 12.0:0000 18.0:0000 24.0:0000 36.0:0000 48.0:0000 54.0:0000 6.5:0000 13.0:0000 19.5:0000 26.0:0000 39.0:0000 52.0:0000 58.5:0000 65.0:0000 13.0:0000 26.0:0000 39.0:0000 52.0:0000 78.0:0000 104.0:0000 117.0:0000 130.0:0000 13.5:0000 27.5:0000 40.5:0000 54.0:0000 81.5:0000 108.0:0000 121.5:0000 135.0:0000 150.0:0000 27.0:0000 54.0:0000 81.0:0000 108.0:0000 162.0:0000 216.0:0000 243.0:0000 270.0:0000 300.0:0000 after the second batman-adv is up: r...@openwrt:/# cat /mnt/ath9k/phy0/rcstat Rate Success Retries XRetries PER 1.0:0000 2.0:0000 5.5:0000 11.0:0000 6.0:0000 9.0:0000 12.0:0000 18.0:0000 24.0:0000 36.0:0000 48.0:0000 54.0:0000 On both boards I have this: r...@openwrt:/# iwconfig lono wireless extensions. eth0 no wireless extensions. eth1 no wireless extensions. br-lanno wireless extensions. wlan0 IEEE 802.11abgn ESSID:"xyz" Mode:Ad-Hoc Frequency:2.432 GHz Cell: 92:46:0A:A3:8B:39 Tx-Power=27 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 bat0 no wireless extensions. Here is the dmesg dump: r...@openwrt:/# dmesg 30fe050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831da04a DA=831da044 BSSID=831da050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8312204a DA=83122044 BSSID=83122050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1804 wlan0: RX ProbeReq SA=8326804a DA=83268044 BSSID=83268050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8319e04a DA=8319e044 BSSID=8319e050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: RX ProbeReq SA=831ac04a DA=831ac044 BSSID=831ac050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8309604a DA=83096044 BSSID=83096050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831e204a DA=831e2044 BSSID=831e2050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=831a204a DA=831a2044 BSSID=831a2050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=832de04a DA=832de044 BSSID=832de050 (tx_last_beacon=1) wlan0: RX ProbeReq SA=8324604a DA=83246044 BSSID=83246050 (tx_last_beacon=1) wlan0: Sending ProbeResp to 838e1604 wlan0: R
