Hi there,
I have a problem using my soekris 4801 with two miniPCI wireless cards (R52H
High Power Mikrotik 802.11a/b/g mPCI).
The problem is the following. When each wireless card works alone I have not
problem, and I obtain a throughput of about 24-25Mbps.
However, when both cards work simultaneously, the per flow throughput of each
cards is reduce of about 40%, even if the two wireless cards use different
channels (1 and 11).
My testbed consisted of a soekris 4801 (runnig Debian with linux kernel 2.6.22
) with two R52H High Power Mikrotik 802.11a/b/g mPCI adapter. I installed one
miniPCI card into the Mini-PCI socket, and I put the second one into the PCI
slot using a miniPCI to PCI single Slot Adapter. As wireless driver I used the
madwifi driver version 0.9.4.
To see the throughput reduction I opened two outgoing asimptotic UDP flows
(using the iperf tool) between the soekris board and two laptop. The two
wireless cards worked in ad-hoc mode and I used 54Mbps as the wireless
transmission rate (I disable the autorate alghoritm).
I repeated the same experiment using a PC equipped with an Athlon 64 processor
(2043.086 MHz processor with 1GB of memory). I put both the wireless cards into
two PCI slots using two miniPCI to PCI single Slot Adapter. In this case both
the wireless cards are able to work simultaneously and I obtained a per flow
throughput of about 24-25Mbps.
Has anyone experienced the same problem?
I would be really grateful if anyone shared his experience relative to
my question.
Regards,
Emilio Ancillotti
--
============================================================
Emilio Ancillotti, PhD
Pervasive Computing & Networking Lab. (PerLab)
Institute for Informatics and Telematics (IIT)
National Research Council (CNR)
Via G. Moruzzi, 1 || voice: +39 050 315 2437
56124 Pisa, Italy || fax: +39 050 315 2113
|| mobile: +39 328 2963760
============================================================
_______________________________________________
Soekris-tech mailing list
[email protected]
http://lists.soekris.com/mailman/listinfo/soekris-tech
