Just find where in ath9k it sets the supported streams and set it to 2, not 3.
Adrian On 22 June 2011 20:42, Fred Matthews <fre...@hotmail.co.uk> wrote: > > Hi, > > I used that command to disable the third antenna, and applied it to both AP > and STA AR9380 NICs. > I then performed an IPerf test between both and then captured the statistics > from the sender, (below) . > You can see that in rc_stats (minstrel), the rate control actually > "attempts" sending on 3 stream MCSs (16-23) around 256 times each. > > Is there any way to prevent the RC from even attempting those rates, as if I > where to fully imitate an AR9280, it shouldnt attempt at those MCSs. > > Can Susinders comments also be detailed. > > Thanks in advance > > # cat /sys/kernel/debug/ieee80211/phy0/netdev\:wlan0/stations/00\MAC/ > > AUTH > ASSOC > AUTHORIZED > WME > ht supported > cap: 0x11ce > HT20/HT40 > SM Power Save disabled > RX HT40 SGI > TX STBC > RX STBC 1-stream > Max AMSDU length: 7935 bytes > DSSS/CCK HT40 > ampdu factor/density: 3/6 > MCS mask: ff ff ff 00 00 00 00 00 00 00 > MCS tx params: 1 > 792 > 150 ffff ffff ffff ffff ffff 60 ffff ffff ffff ffff ffff ffff ffff ffff ffff > a40 > -77 > 0 > type rate throughput ewma prob this prob this succ/attempt > success attempts > HT20/LGI MCS0 6.6 99.9 100.0 0( 0) 163 > 230 > HT20/LGI MCS1 13.1 100.0 100.0 0( 0) 75 > 75 > HT20/LGI MCS2 19.3 100.0 100.0 0( 0) 252 > 252 > HT20/LGI MCS3 25.4 100.0 100.0 0( 0) 75 > 75 > HT20/LGI MCS4 36.2 97.5 100.0 0( 0) 413 > 474 > HT20/LGI MCS5 0.0 0.0 0.0 0( 0) 0 > 76 > HT20/LGI MCS6 0.0 0.0 0.0 0( 0) 0 > 80 > HT20/LGI MCS7 0.0 0.0 0.0 0( 0) 0 > 256 > HT20/LGI MCS8 13.1 100.0 100.0 0( 0) 75 > 75 > HT20/LGI MCS9 25.4 100.0 100.0 0( 0) 70 > 70 > HT20/LGI MCS10 34.2 92.2 100.0 0( 0) 79 > 82 > HT20/LGI MCS11 0.0 0.0 0.0 0( 0) 0 > 76 > HT20/LGI MCS12 0.0 0.0 0.0 0( 0) 0 > 256 > HT20/LGI MCS13 0.0 0.0 0.0 0( 0) 0 > 256 > HT20/LGI MCS14 0.0 0.0 0.0 0( 0) 0 > 256 > HT20/LGI MCS15 0.0 0.0 0.0 0( 0) 0 > 256 > HT20/LGI MCS16 0.0 0.0 0.0 0( 0) 0 > 75 > HT20/LGI MCS17 0.0 0.0 0.0 0( 0) 0 > 68 > HT20/LGI MCS18 0.0 0.0 0.0 0( 0) 0 > 85 > HT20/LGI MCS19 0.0 0.0 0.0 0( 0) 0 > 257 > HT20/LGI MCS20 0.0 0.0 0.0 0( 0) 0 > 256 > HT20/LGI MCS21 0.0 0.0 0.0 0( 0) 0 > 256 > HT20/LGI MCS22 0.0 0.0 0.0 0( 0) 0 > 256 > HT20/LGI MCS23 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS0 13.6 100.0 100.0 0( 0) 75 > 75 > HT40/LGI MCS1 26.5 100.0 100.0 0( 0) 72 > 72 > HT40/LGI MCS2 38.3 100.0 100.0 0( 0) 73 > 73 > HT40/LGI MCS3 49.7 99.9 100.0 0( 0) 70 > 73 > HT40/LGI MCS4 0.0 0.0 0.0 0( 0) 10 > 1220 > HT40/LGI MCS5 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS6 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS7 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS8 26.2 98.9 100.0 0( 0) 73 > 74 > HT40/LGI MCS9 49.3 99.2 100.0 0( 0) 67 > 69 > HT40/LGI MCS10 20.5 28.9 0.0 0( 0) 14 > 255 > HT40/LGI MCS11 0.0 0.0 0.0 0( 0) 0 > 257 > HT40/LGI MCS12 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS13 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS14 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS15 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS16 0.0 0.0 0.0 0( 0) 0 > 74 > HT40/LGI MCS17 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS18 0.0 0.0 0.0 0( 0) 0 > 255 > HT40/LGI MCS19 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS20 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS21 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS22 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/LGI MCS23 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS0 15.1 100.0 100.0 0( 0) 70 > 70 > HT40/SGI MCS1 29.2 100.0 100.0 0( 0) 72 > 72 > HT40/SGI t MCS2 38.5 91.3 100.0 0( 0) 81 > 83 > HT40/SGI PMCS3 54.3 99.5 100.0 0( 0) 66536 > 67803 > HT40/SGI MCS4 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS5 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS6 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS7 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS8 29.2 100.0 100.0 0( 0) 67 > 67 > HT40/SGI T MCS9 54.6 99.9 100.0 0( 0) 310227 > 312339 > HT40/SGI MCS10 22.7 29.3 100.0 0( 0) 14 > 46.8 Mbits/sec 255 > HT40/SGI MCS11 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS12 0.0 0.0 0.0 0( 0) 0 > 255 > HT40/SGI MCS13 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS14 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS15 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS16 0.0 0.0 0.0 0( 0) 0 > 68 > HT40/SGI MCS17 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS18 0.0 0.0 0.0 0( 0) 0 > 255 > HT40/SGI MCS19 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS20 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS21 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS22 0.0 0.0 0.0 0( 0) 0 > 256 > HT40/SGI MCS23 0.0 0.0 0.0 0( 0) 0 > 256 > > Total packet count:: ideal 365056 lookaround 13702 > Average A-MPDU length: 5.4 > >> Date: Tue, 21 Jun 2011 14:25:36 +0530 >> Subject: Re: [ath9k-devel] Disabling the third antenna for AR9380 in ath9k >> From: shafi.wirel...@gmail.com >> To: fre...@hotmail.co.uk >> CC: linux-ker...@vger.kernel.org; linux-wirel...@vger.kernel.org; >> ath9k-de...@venema.h4ckr.net; ath9k-devel@lists.ath9k.org; >> susin...@qca.qualcomm.com >> >> On Tue, Jun 21, 2011 at 2:07 AM, Fred Matthews <fre...@hotmail.co.uk> >> wrote: >> > Hi all, >> > I am installing the AR9380 NIC on laptops, but some only have two UFL >> > connectors, and thus I was wondering if using only two of the UFL >> > antenna >> > ports will have any negative effect or difference than installing a 2x2 >> > NIC >> > (AR9280 for example which has only 2 ports anyway). Please kindly >> > explain >> > with references if possible. >> > Also for example is there anyway to disable transmission on the third >> > UFL >> > port (antenna) from ath9k or otherwise. >> > Thank you all very much >> >> you can change the tx/rx chainmask for 3x3 AR9380 to disable >> transmission on the third antenna >> cd /sys/kernel/debug/ieee80211/phy0/ath9k# echo 0x3 > tx_chainmask >> cd /sys/kernel/debug/ieee80211/phy0/ath9k# echo 0x3 > rx_chainmask >> >> after this, ideally it should operate as 2x2 device as per Susinders >> comments. but if you got AR9280 please try to use that if 2 antenna is >> the constraint. >> >> >> > _______________________________________________ >> > ath9k-devel mailing list >> > ath9k-devel@lists.ath9k.org >> > https://lists.ath9k.org/mailman/listinfo/ath9k-devel >> > >> > >> >> >> >> -- >> shafi > > _______________________________________________ > ath9k-devel mailing list > ath9k-devel@lists.ath9k.org > https://lists.ath9k.org/mailman/listinfo/ath9k-devel > > _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
