Please post your soekris comBIOS version and kernel config. This doesnt sound like a madwifi driver problem, it sound more like a kernel tuning issue.
Frank Sam Leffler wrote:
Flemming Frandsen wrote:Hi, I'm using Atheros 5212 minipci cards with the latest linux driver (from SVN) and I find that I cannot get more than 24Mb/s out of the wireless link, is that normal?Did you ask on the madwifi lists? I routinely get 28 Mb/s for upstream tcp netperf w/ bursting enabled. Unidirectional udp tests usually get 36 Mb/s. All numbers are open air w/ strong signal. freebsd, not linux.I've tested it by routing traffic through the link and running iperf on separate machines, so nothing runs on the net4801 machines other than the kernel and top.I first tried setting one box to AP and the other to Sta and that got me 13Mb/s with the CPU maxed out, when I switched to ahdemo mode (like adhoc, but without any fancy stuff like mac addresses) that got me 22Mb/s.Then I upgraded to the very latest driver and that got me 24Mb/s, but the CPU is still the bottleneck, which is really quite sad as I was hoping to saturate the wireless link.One could argue that I'm simply trying to go faster than the cpu allows, but I get 50Mb/s if I iperf to the box from eth0, so the CPU should be capable of routing that much, right?I guess my main questions are: * Is this really all I can hope for with Atheros cards? * If it's the card that has been designed to eat CPU then are there others that do more work in hardware? * On paper the net5501 looks to be about twice as fast as net4801, which is not quite enough to reach the performance I want, how does the net5501 CPU perform compared to net4801? Max at 54Mb/s (CPU maxed out): AP/STA mode: 13Mb/s ahdemo mode: 22Mb/s New driver: 24Mb/s 802.11a (ch 136): Bit Rate=54 Mb/s : 24.3Mb/s (0% idle) Bit Rate=36 Mb/s : 16Mb/s (15% idle) Bit Rate=24 Mb/s : 15Mb/s (37% idle) Bit Rate=6 Mb/s : 4.3Mb/s (81% idle) 802.11Ta (ch 152): Bit Rate=54 Mb/s : 23.5Mb/s Bit Rate=36 Mb/s : 23.5Mb/s Bit Rate=24 Mb/s : 23.9Mb/s Bit Rate=12 Mb/s : 17Mb/s Bit Rate=6 Mb/s : 9Mb/s The driver version is:ath_hal: 0.9.30.13 (AR5210, AR5211, AR5212, AR5416, RF5111, RF5112, RF2413, RF5413, RF2133) wlan: 0.8.4.2 (svn r2377) ath_pci: 0.9.4.5 (svn r2377) ath_rate_sample: 1.2 (svn r2377)You need to ask the madwifi folks for help. I recently had an exchange w/ a developer who was trying to reduce cpu overhead but a 4801 should be able to easily saturate the wireless link.Sam _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
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