Date: Sat, 23 Aug 2014 12:23:47 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Johannes Dieterich <dieterich.joh@gmail.com> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: iwn: Intel Centrino 6205 bad 11n performance Message-ID: <CAJ-VmomUrz=o8Ma5KKN-a4LGA6uwqUacCWUXAp34r1%2BU8YsK2A@mail.gmail.com> In-Reply-To: <CABquGzWbT95iFHHZ8q3aOuGjmjwjP1vKczOyM6dMO%2B1urS6AZg@mail.gmail.com> References: <CABquGzVryyUoOo82fe9WqR2g53fgkZpUdVRiz_TAR8MfW49Z=w@mail.gmail.com> <CAJ-VmonrTi2BxNV_JUX79QJmYrDEMAvRcfZ9PzUr39N%2BY%2Bp4Ww@mail.gmail.com> <CABquGzWbT95iFHHZ8q3aOuGjmjwjP1vKczOyM6dMO%2B1urS6AZg@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Please file a PR. I may end up getting around to it. I don't know whether it's 11n TX or 11n RX, but we should really debug it. -a On 23 August 2014 12:19, Johannes Dieterich <dieterich.joh@gmail.com> wrote: > Dear Adrian > > thanks a lot for the suggestion! Removing ht indeed improves the throughput > to 1.7 MB/s. Still far from the maximum of my uplink but sufficient for the > time being and much improved. > > Concerning the non-existing maintainer: does it in this case even make sense > to file a PR? > > Given how common the Intel WLAN NICs (unfortunately) are and how some > notebooks have white lists making a change to e.g. ath impossible, it is a > real bummer that nobody maintains it. Thanks for your work on ath, btw, > those NICs are working great nowadays! > > Thanks again for the help! > > Johannes > > > On Wed, Aug 20, 2014 at 12:30 AM, Adrian Chadd <adrian@freebsd.org> wrote: >> >> Hi, >> >> You can try disabling 11n (ifconfig -ht) but besides that, there's no >> real iwn maintainer or anyone who wants to get really nitty gritty >> into what the driver is doing. So until that happens, I think we're >> short of luck. :( >> >> >> -a >> >> >> On 19 August 2014 12:53, Johannes Dieterich <dieterich.joh@gmail.com> >> wrote: >> > Dear all, >> > >> > I have a Intel Centrino Advanced-N 6205 WLAN NIC in my Thinkpad using >> > iwn. >> > >> > iwn0@pci0:3:0:0: class=0x028000 card=0x13118086 chip=0x00858086 >> > rev=0x34 >> > hdr=0x00 >> > vendor = 'Intel Corporation' >> > device = 'Centrino Advanced-N 6205 [Taylor Peak]' >> > class = network >> > >> > Unfortunately, I only get a rather bad speed using CURRENT (r270098) out >> > of >> > the chip. It is connected to an 11n (on the 2.4 GHz band) network: >> > >> > wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu >> > 1500 >> > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> >> > media: IEEE 802.11 Wireless Ethernet MCS mode 11ng >> > status: associated >> > ssid XXXXX channel 4 (2427 MHz 11g ht/20) bssid XXXXXXXXXX >> > country US authmode WPA2/802.11i privacy ON deftxkey UNDEF >> > TKIP 2:128-bit txpower 15 bmiss 10 scanvalid 60 bgscan bgscanintvl >> > 300 >> > bgscanidle 250 roam:rssi 7 roam:rate 64 protmode CTS ampdulimit 64k >> > ampdudensity 8 -amsdutx amsdurx shortgi wme roaming MANUAL >> > >> > I get a maximum of 900 KB/s of throughput (both in/out, approximated by >> > copying a large file using scp), within the network and to the outside >> > world. Running SuSE Linux on the notebook allows me to easily saturate >> > my >> > uplink at > 3MB/s, didn't then further check within the network. I get >> > no >> > log messages on FBSD from iwn and I am not located in a particularly >> > noisy >> > neighborhood. >> > >> > The only performance issue I can find with this chip is one old report >> > on >> > Ubuntu (http://ubuntuforums.org/showthread.php?t=1949571), where the 11n >> > seemed to be the culprit in the driver/firmware. Could this be an issue >> > for >> > us as well (firmware problem?)? >> > >> > As my workhorse is FreeBSD, I'd love to fix this issue. How can I >> > further >> > debug this issue and/or provide more data? I know that the status of iwn >> > in >> > FBSD is difficult ATM but maybe there is hope? >> > >> > Best >> > >> > Johannes >> > _______________________________________________ >> > freebsd-wireless@freebsd.org mailing list >> > http://lists.freebsd.org/mailman/listinfo/freebsd-wireless >> > To unsubscribe, send any mail to >> > "freebsd-wireless-unsubscribe@freebsd.org" > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAJ-VmomUrz=o8Ma5KKN-a4LGA6uwqUacCWUXAp34r1%2BU8YsK2A>