On 05/31/2012 12:24 PM, Adrian Chadd wrote:
.. yup, I got it to 250MBit UDP. :-) It turns out that (at least in FreeBSD-9), the scheduler and sleep state behaviour when doing adaptive power save/sleep state (ie, adaptive CPU speed changes, going into C2) is enough to negatively impact my iperf and ath/net80211 taskqueue scheduling. When I nail it back up to C1, fixed speed - everything is perfectly fine. I'll go and do some further digging into this, but it's good to see that I can squeeze decently high throughput out of the 2x2 NICs.
I'm getting right at 250Mbps of UDP payload received when using a 2x2 AR9382 NIC (WPEA-121N) in a Lenovo X220i (with hacked white-listed BIOS). AP is a 3x3 AR9380 NIC (WPEA_127N) in Atom based network appliance. Open-air connection, about 3 feet apart. This is in the 'download' direction: Wired to Station. HT-40 on 5Ghz. The rates bounce around a bit...down to 240Mbps or so for a bit, then back to 250Mbps. Might be some other interference around as this is a relatively noisy environment... Upload speed seems to be a constant 243Mbps..at least at this moment. Kernel is 3.3.7+. Thanks, Ben -- Ben Greear <greearb@xxxxxxxxxxxxxxx> Candela Technologies Inc http://www.candelatech.com -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
