Poor performance w/Intel 2200BG (iwi) on FreeBSD 9.2

Sat Mar 15 01:55:17 UTC 2014

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 at 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 at 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 at 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
>> >>
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