Hi,
I use Compat Wirless 3.5 of June 2012, I have a live custom Ubuntu live unning
from pendrives so it's hard to remake the platform everyday. I have no tried
this compatWireless in infrastructure mode, but I tried it before with an old
WC and all was running at high speed without loses. I checked that the problem
is when the system has configured by automaticly or manualy a bitrate under 6
Mbps inclusive, so for testing I have path the problem using : "iw dev mesh0
set bitrates legacy-2.4 9 11 12 18 24 36 48 54". avoiding lower rates ( yes, a
problem for long range system). Now I achieve 12.9 Mbps in TCP and 14.9 in UDP
with 0% loses. (no HT modes available)
Thanks,
David
________________________________
De: Jason Abele <[email protected]>
Para: David Romero <[email protected]>; [email protected]
Enviado: Lunes 10 de septiembre de 2012 21:08
Asunto: Re: anormal iperfs with UDP unicast
On Thu, Sep 6, 2012 at 2:05 PM, David Romero <[email protected]> wrote:
> Hi all,
>
> I had some strange results in my testing:
> Scenario: 2 nodes, with normal configuration, Ubuntu 12.4, kernel 3.x, HW:
> usb DWL-G122, wCompat 3.5, less noisy channel of all at the room, static
> nodes. Room with no other radios.
I do not have access to the same hardware, so I used some ath9k_htc
usb adapters laying around.
Setup: 3.2.0-27 with compat-wireless 2012-04-15, both interfaces part
of a mesh network
> - Trasfers from node_a to node_b:
> "iperf -c node_b -u -b5M -t 60" achieve high lose rate med (33%), max BW: 3
> Mbps
> "iperf -c node_b -u -b10M -t 60" achieve high lose rate med (25%), max BW: 6
> Mbps
> "iperf -c node_b -u -b15M - t 60" achieve high lose rate med (21%), max BW:
> 8 Mbps
>
> if I check with "-i 10" I can see how the rate in each is going up and down
> (40% of range)
iperf -c 10.242.97.232 -u -b200M -t 60 -i 10
------------------------------------------------------------
Client connecting to 10.242.97.232, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 224 KByte (default)
------------------------------------------------------------
[ 3] local 10.99.125.123 port 34412 connected with 10.242.97.232 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 49.1 MBytes 41.2 Mbits/sec
[ 3] 10.0-20.0 sec 53.1 MBytes 44.5 Mbits/sec
[ 3] 20.0-30.0 sec 59.9 MBytes 50.3 Mbits/sec
[ 3] 30.0-40.0 sec 61.8 MBytes 51.8 Mbits/sec
[ 3] 40.0-50.0 sec 56.9 MBytes 47.7 Mbits/sec
[ 3] 50.0-60.0 sec 53.3 MBytes 44.7 Mbits/sec
[ 3] 0.0-60.0 sec 334 MBytes 46.7 Mbits/sec
[ 3] Sent 238375 datagrams
[ 3] Server Report:
[ 3] 0.0-60.1 sec 334 MBytes 46.6 Mbits/sec 1.177 ms 66/238374 (0.028%)
[ 3] 0.0-60.1 sec 1 datagrams received out-of-order
with similar data rates and packet losses on the server
Could you tell us what version of compat-wireless was used and have
you tried this iperf test with infrastructure mode with the same
hardware or mesh mode with other hardware?
Thanks
Jason
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