From owner-freebsd-wireless@FreeBSD.ORG Wed Sep 7 15:37:52 2011 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 573DB106566B for ; Wed, 7 Sep 2011 15:37:52 +0000 (UTC) (envelope-from lev@serebryakov.spb.ru) Received: from onlyone.friendlyhosting.spb.ru (onlyone.friendlyhosting.spb.ru [IPv6:2a01:4f8:131:60a2::2]) by mx1.freebsd.org (Postfix) with ESMTP id ECCB98FC18 for ; Wed, 7 Sep 2011 15:37:51 +0000 (UTC) Received: from lion.home.serebryakov.spb.ru (unknown [IPv6:2001:470:923f:1:14f9:cfdf:caf2:2c18]) (Authenticated sender: lev@serebryakov.spb.ru) by onlyone.friendlyhosting.spb.ru (Postfix) with ESMTPA id 48CCB4AC58 for ; Wed, 7 Sep 2011 19:37:50 +0400 (MSD) Date: Wed, 7 Sep 2011 19:37:47 +0400 From: Lev Serebryakov X-Priority: 3 (Normal) Message-ID: <663133681.20110907193747@serebryakov.spb.ru> To: freebsd-wireless@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=windows-1251 Content-Transfer-Encoding: quoted-printable Subject: AP performance (again): txpower regulation X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Sep 2011 15:37:52 -0000 Hello, Freebsd-wireless. I return to experiments with my AP (FreeBSD based) again. I don't attach new (802.11n-capable) card yet, as I cannot buy U.FL->RP-SMA pigtails locally, but now I have two notebooks -- old Vayo and "new" MacBook with KisMAC installed. I've checked theory (by Bernhard Schmidt), that my AP is TOO powerful: set Vaio to run "iperf" forever, and monitor situation with MacBook (KisMAC). iperf output (each 2 seconds) looks like this: [ 3] 70.0-72.0 sec 1.00 MBytes 4.19 Mbits/sec [ 3] 72.0-74.0 sec 1.12 MBytes 4.72 Mbits/sec [ 3] 74.0-76.0 sec 1.25 MBytes 5.24 Mbits/sec [ 3] 76.0-78.0 sec 1.00 MBytes 4.19 Mbits/sec [ 3] 78.0-80.0 sec 1.12 MBytes 4.72 Mbits/sec ifconfig wlan0 list sta looks like ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG 00:18:de:08:e8:1d 2 9 11M 17.0 0 64411 15648 EPS AQE RSN W= ME 00:18:de:08:e8:1d 2 9 11M 18.0 0 64844 19088 EPS AQE RSN W= ME 00:18:de:08:e8:1d 2 9 11M 17.0 0 65283 22560 EPS AQE RSN W= ME 00:18:de:08:e8:1d 2 9 11M 17.5 0 169 25904 EPS AQE RSN W= ME 00:18:de:08:e8:1d 2 9 11M 16.5 0 668 29856 EPS AQE RSN W= ME 00:18:de:08:e8:1d 2 9 11M 17.0 0 1120 33440 EPS AQE RSN W= ME KisMAC (with Macbook placed near to Vaio) shows oscillation of signal powe= r from 40 no 0 back and forth, more "0" than "40" with average about 37. I don't know, is these zeroes meaningful, or it is result of channel hopping. I've tried to set "txpower" from 1 to 30 (1, 5, 10, 15, 30) and wait for 1 minute between settings. NOTHING CHANGES AT ALL. It seems, that txpower doesn't work on my hardware :( My next experiment is to boot 9.0-BETA1 on my AP. Hardware is: Senao EMP 8602 Plus-S Mini-PCI WiFi card. It is Atheros 5413 based 600mW card: ath0: mem 0xa0060000-0xa006ffff irq 15 at device 17.0 on pci0 ath0: [ITHREAD] ath0: AR5413 mac 10.4 RF5413 phy 6.1 10dBi omni antenna. --=20 // Black Lion AKA Lev Serebryakov