Date: Mon, 17 Mar 2014 18:46:58 -0700 From: Adrian Chadd <adrian.chadd@gmail.com> To: Jim Long <james@museum.rain.com> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: Poor performance w/Intel 2200BG (iwi) on FreeBSD 9.2 Message-ID: <CAJ-VmonLYQn4X%2BeOcegOuOZ8J0TchaEfrVc7Yhg9TJsHOWC2Xg@mail.gmail.com> In-Reply-To: <CAJ-VmokGv2Ug7PDc6LcR%2Bp=A2te5L6QuOoY1vrO9d0yhiZJ9GQ@mail.gmail.com> References: <20140314230013.GA25473@ns.umpquanet.com> <CAJ-VmonmH1vDqtL=Pu6sG53Ro-3DyC5QmtKtUJtvZmTDbM0Aug@mail.gmail.com> <CAJ-VmomfR5YQqaj8pYB80tLEdEcJjP0a%2B1tXqE6V1-Tpo7MLRQ@mail.gmail.com> <20140315010640.GB65392@ns.umpquanet.com> <CAJ-VmokGv2Ug7PDc6LcR%2Bp=A2te5L6QuOoY1vrO9d0yhiZJ9GQ@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Yup, I found a 2100 and 2200. And yes it does dump out a bunch of statistics stuff when the NIC is running. I'll see about exposing the statistics messages via some API soon. -a On 14 March 2014 18:55, Adrian Chadd <adrian.chadd@gmail.com> wrote: > Nope; there's no code for handling the messages yet. > > I'll dig around to see if I can find a 2200 series NIC in a laptop > here or in my collection. I know I have 3945 NICs, but not the 2200.. > > -a > > > On 14 March 2014 18:06, Jim Long <james@museum.rain.com> wrote: >> Thank you for your reply. >> >> This would be via syslog in /var/log/messages? Nothing that I see: >> >> $ zgrep -il notification /var/log/messages* >> $ >> >> >> >> On Fri, Mar 14, 2014 at 05:50:12PM -0700, Adrian Chadd wrote: >>> It'd be stuff like this: >>> >>> case IWI_NOTIF_TYPE_CALIBRATION: >>> case IWI_NOTIF_TYPE_NOISE: >>> case IWI_NOTIF_TYPE_LINK_QUALITY: >>> DPRINTFN(5, ("Notification (%u)\n", notif->type)); >>> break; >>> >>> >>> >>> -a >>> >>> >>> On 14 March 2014 17:18, Adrian Chadd <adrian.chadd@gmail.com> wrote: >>> > Hi, >>> > >>> > I'm not sure what kind of statistics or diagnostics iwi spits out. >>> > It's likely worth reviewing the linux and freebsd drivers to see if it >>> > does spit out any kind of statistics messages. That's a good starting >>> > point. >>> > >>> > Thanks! >>> > >>> > >>> > -a >>> > >>> > >>> > On 14 March 2014 16:00, Jim Long <james@museum.rain.com> wrote: >>> >> I have a long-standing problem that involves the iwi interface on >>> >> my Thinkpad T42 running 9.2-PRERELEASE circa 28 Aug 2013. >>> >> >>> >> Some wifi connections I make show good signal strength, but poor >>> >> latency and/or packet loss to the WAP IP. I can't find other >>> >> wifi users who perceive the wifi performance as poor, so I am >>> >> assuming the problem is local to me. >>> >> >>> >> I will say this is generally repeatable by location: good >>> >> locations are usually good, bad locations are usually bad. My >>> >> theory is that the 2200BG likes some WAPs that I use more than it >>> >> likes others. I'd like to find out what I can do to either fix >>> >> the problem, or at least be able to accurately tell the WAP owner >>> >> what their problem is. >>> >> >>> >> I'm ignorant about how to troubleshoot problems like this, so >>> >> please suggest some diagnostic information I can provide to guide >>> >> either of us toward a solution. >>> >> >>> >> Thank you, >>> >> >>> >> Jim >>> >> >>> >> from dmesg: >>> >> >>> >> iwi0: <Intel(R) PRO/Wireless 2200BG> mem 0xc0214000-0xc0214fff irq 11 at device 2.0 on pci2 >>> >> wlan0: Ethernet address: 00:12:f0:ca:5c:85 >>> >> >>> >> I get this a lot, but don't know if it's relevant. It seems >>> >> to appear during both good and bad connections: >>> >> >>> >> iwi0: need multicast update callback >>> >> >>> >> >>> >> Here's 61db of S/N ratio, resulting in almost 50% packet loss: >>> >> >>> >> $ wlanstats ; ping -c20 wap2 >>> >> 36 rx frame too short >>> >> 5 rx from wrong bssid >>> >> 374 rx discard 'cuz dup >>> >> 5 rx discard 'cuz mcast echo >>> >> 3 rx discard mgt frames >>> >> 1347 rx beacon frames >>> >> 4151 rx element unknown >>> >> 42 rx frame chan mismatch >>> >> 7 rx disassociation >>> >> 7 beacon miss events handled >>> >> 6 active scans started >>> >> 1446 rx management frames >>> >> 2 tx failed 'cuz vap not in RUN state >>> >> 28752 total data frames received >>> >> 8679 unicast data frames received >>> >> 20073 multicast data frames received >>> >> 12186 total data frames transmit >>> >> 12186 unicast data frames sent >>> >> 54M current transmit rate >>> >> 61 current rssi >>> >> -95 current noise floor (dBm) >>> >> -34 current signal (dBm) >>> >> PING wap2 (192.168.2.1): 56 data bytes >>> >> 64 bytes from 192.168.2.1: icmp_seq=0 ttl=64 time=20.726 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=0.974 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=1.278 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=3 ttl=64 time=1.942 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=4 ttl=64 time=1.008 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=8 ttl=64 time=0.921 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=10 ttl=64 time=1.755 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=11 ttl=64 time=0.934 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=13 ttl=64 time=2.803 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=16 ttl=64 time=1.698 ms >>> >> 64 bytes from 192.168.2.1: icmp_seq=18 ttl=64 time=2.382 ms >>> >> >>> >> --- wap2 ping statistics --- >>> >> 20 packets transmitted, 11 packets received, 45.0% packet loss >>> >> round-trip min/avg/max/stddev = 0.921/3.311/20.726/5.540 ms >>> >> >>> >> To my knowledge the OS is using the latest 3.1 firmware for the >>> >> interface: >>> >> >>> >> $ cd /usr/src/sys/contrib/dev/iwi >>> >> $ grep ^FW Makefile; md5 * >>> >> FW_VERSION=3.1 >>> >> MD5 (LICENSE) = 11963afae1fb1117b86fde8187152b9a >>> >> MD5 (Makefile) = 2e4c774520e878e5cf8f3be7373fec02 >>> >> MD5 (ipw2200-bss.fw.uu) = 7c15a60e1ccf28c332d3d795af99012b >>> >> MD5 (ipw2200-ibss.fw.uu) = b529089d6eee6c12a918f361ee2c8347 >>> >> MD5 (ipw2200-sniffer.fw.uu) = 9e6c7a76cb528cb1d9f1996189d9c699 >>> >> >>> >> _______________________________________________ >>> >> 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-VmonLYQn4X%2BeOcegOuOZ8J0TchaEfrVc7Yhg9TJsHOWC2Xg>