On 1 March 2013 06:31, Sujith Manoharan <sujith@xxxxxxxxxxx> wrote: > Felix Fietkau wrote: >> What was the distance and what was the rate used? > > A distance of about a meter between the AP and STA. > > AP: DB120 - running an internal build. > STA: WB222 - wireless-testing HEAD. > Signal is about -43 dBm. > Channel 40, HT40- > > I've attached sample runs with minstrel_ht and ath9k-rc. With minstrel_ht, > the numbers fluctuate between 180 and 190 Mbps and the average throughput > varies each time (185, 186 etc.). With ath9k-rc, it's 195+ always. Right. And the reason that it fluctuates is quite likely because at the higher MCS rates (6,7/14,15/22,23) the channel behaviour is not consistent and there's varying levels of packet loss, so things oscillate between a bunch of MCS rates there. IIRC, the ath9k_rc algorithm is a lot more aggressive at sticking to a fixed, working MCS rate. (190mbit TCP on 2-stream? Damn. Looks like I have a little more optimisation to do in FreeBSD. I'm only hitting 160/170mbit TCP on AR9280<->AR9280 and AR9280<->AR9287. But I hit 220-240mbit UDP.) Thanks, Adrian -- 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
