On Thu, Jan 28, 2010 at 4:13 PM, Joerg Pommnitz <pommnitz@xxxxxxxxx> wrote: > Hello all, > I have a strange performance problem with ath9k. I have two otherwise identical systems with an ath5k-supported card in system ATH5K and an ath9k supported card in system ATH9K. > Doing an UDP iperf run were ATH5K is the client/sender and ATH9K is the server/receiver I easily get data rates of 31MBit/s (tx data rate on the sender is manually set to 54 MBit/s). > Running the same test with ATH9K as client/sender and ATH5K as server/receiver gives maximum data rates of about 22MBit/s, about 30% less. > > Doing the test against another ath9k system (e.g. ATH9K ==> ATH9K2) gives > the same max data rate of only 22 MBit/s, so the problem seems to be the > ath9k driver or the hardware. Can anybody confirm these problems? Is this > a known limitation? Any buttons to push to get things going faster? > > Details: > the ath5k card is a AR2413 based design (Compex WLM54AG), the ath9k card > is a AR9220 (Compex WLM200NX 6A). The systems are connected in IBSS mode > on channel 40 (5200MHz). > The kernel version is wireless-testing as of January, 26. The kernel is > slightly patched to enable IBSS in 802.11a (we are allowed to do this). > > Can anybody shed some light on this strange issue? Luis? > > -- > Regards > Joerg > > __________________________________________________ > Do You Yahoo!? > Sie sind Spam leid? Yahoo! Mail verfügt über einen herausragenden Schutz gegen Massenmails. > http://mail.yahoo.com > _______________________________________________ > ath9k-devel mailing list > ath9k-devel@xxxxxxxxxxxxxxx > https://lists.ath9k.org/mailman/listinfo/ath9k-devel > Can you try in AP-client mode? I think you'll get more throughput so. -- 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
