Return-path: Received: from he.sipsolutions.net ([78.46.109.217]:50303 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753748Ab2DWGr5 (ORCPT ); Mon, 23 Apr 2012 02:47:57 -0400 Message-ID: <1335163675.3928.1.camel@jlt3.sipsolutions.net> (sfid-20120423_084800_522009_51247678) Subject: Re: carl9170 - monitor mode TP drop From: Johannes Berg To: Janusz Dziedzic Cc: Christian Lamparter , linux-wireless Date: Mon, 23 Apr 2012 08:47:55 +0200 In-Reply-To: (sfid-20120423_062709_111941_72F1C6FE) References: <201204201959.56495.chunkeey@googlemail.com> (sfid-20120423_062709_111941_72F1C6FE) Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Mon, 2012-04-23 at 06:27 +0200, Janusz Dziedzic wrote: > This is a scenario: > AP <--> STA1 (channel 6) > STA2 == carl_monitor (channel 6) > > This is what I can see on STA1: > # iperf -c 192.168.254.1 -t 100 -i 5 > ------------------------------------------------------------ > Client connecting to 192.168.254.1, TCP port 5001 > TCP window size: 512 KByte (default) > ------------------------------------------------------------ > [ 3] local 192.168.254.181 port 46048 connected with 192.168.254.1 port 5001 > [ ID] Interval Transfer Bandwidth > [ 3] 0.0- 5.0 sec 17.4 MBytes 29.2 Mbits/sec > [ 3] 5.0-10.0 sec 19.6 MBytes 32.9 Mbits/sec > [ 3] 10.0-15.0 sec 20.4 MBytes 34.2 Mbits/sec > [ 3] 15.0-20.0 sec 19.8 MBytes 33.1 Mbits/sec > [ 3] 20.0-25.0 sec 19.8 MBytes 33.1 Mbits/sec > [ 3] 25.0-30.0 sec 19.8 MBytes 33.1 Mbits/sec > [ 3] 30.0-35.0 sec 19.6 MBytes 32.9 Mbits/sec > [ 3] 35.0-40.0 sec 18.1 MBytes 30.4 Mbits/sec > > =====> here I setup carl monitor on second PC, like this: > =====> iw dev wlan0 set type monitor > =====> iw dev wlan0 set freq 2437 > =====> ifconfig wlan0 up > > [ 3] 40.0-45.0 sec 2.38 MBytes 3.98 Mbits/sec > [ 3] 45.0-50.0 sec 2.50 MBytes 4.19 Mbits/sec > [ 3] 50.0-55.0 sec 3.00 MBytes 5.03 Mbits/sec > > Seems I don't even need to start wireshark here ... and see this TP drop. FWIW, I have observed this as well (in the past, my ar9170 devices all died now) johannes