From: Johannes Berg <johannes@sipsolutions.net>
To: Janusz Dziedzic <janusz.dziedzic@gmail.com>
Cc: Christian Lamparter <chunkeey@googlemail.com>,
linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: carl9170 - monitor mode TP drop
Date: Mon, 23 Apr 2012 08:47:55 +0200 [thread overview]
Message-ID: <1335163675.3928.1.camel@jlt3.sipsolutions.net> (raw)
In-Reply-To: <CAFED-jkFtT2agUpymwWN-srTVH+wkh7bbkgkxQg9e4vy+q-Xvw@mail.gmail.com> (sfid-20120423_062709_111941_72F1C6FE)
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
next prev parent reply other threads:[~2012-04-23 6:47 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-20 7:41 carl9170 - monitor mode TP drop Janusz Dziedzic
2012-04-20 17:59 ` Christian Lamparter
2012-04-23 4:27 ` Janusz Dziedzic
2012-04-23 6:47 ` Johannes Berg [this message]
2012-04-23 17:45 ` Christian Lamparter
2012-04-25 5:28 ` Janusz Dziedzic
2012-04-25 17:28 ` Christian Lamparter
2012-04-25 18:24 ` Janusz Dziedzic
2012-04-25 18:54 ` Christian Lamparter
2012-04-26 7:45 ` Janusz Dziedzic
2012-04-26 18:25 ` Christian Lamparter
2012-05-03 7:58 ` Johannes Berg
2012-05-03 21:44 ` Christian Lamparter
2012-05-07 7:00 ` Johannes Berg
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