On 2013-10-15 9:28 AM, Floris Van den Abeele wrote: > While running throughput experiments using iperf I noticed that UDP > throughput in ad-hoc mode was considerably lower than in Infrastructure > mode. The setups I'm comparing is a 802.11a ad-hoc network consisting of > two clients vs a 802.11a infrastructure network consisting of an access > point and a client (11a because the tests were run in the 5GHz band). > > For ad-hoc mode I'm consistenly seeing a lower throughput than for > infrastructure mode: i.e. 22.4 Mbits/sec vs 28.2 Mbits/sec. Note that > while sniffing the medium radiotap headers report a PHY data rate of > 54Mbit/s in both cases. There is no other traffic on the Wi-Fi channel > in question (44). Considering the medium access for both setups is > similair I would expect to find similair throughputs. Is this a known > issue with the linux wireless/mac80211/ath9k driver stack or is this > behaviour conform the 802.11 standard (based on my knowledge I would say > no to the latter)? My test specs are below. > > For testing I'm using Sparklan WPEA-111N NIC's (AR9280). The nodes are > running OpenWrt attitude adjusment on r32482 (from 2012-06-21) with the > REGD patch enabled. I believe that this build of OpenWRT uses the > compat-wireless-2012-06-14.tar.bz2 drivers. I'd suggest that you try a recent version of OpenWrt before investigating further. - Felix -- 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
