Date: Fri, 14 Mar 2014 18:06:40 -0700 From: Jim Long <james@museum.rain.com> To: Adrian Chadd <adrian.chadd@gmail.com> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: Poor performance w/Intel 2200BG (iwi) on FreeBSD 9.2 Message-ID: <20140315010640.GB65392@ns.umpquanet.com> In-Reply-To: <CAJ-VmomfR5YQqaj8pYB80tLEdEcJjP0a%2B1tXqE6V1-Tpo7MLRQ@mail.gmail.com> References: <20140314230013.GA25473@ns.umpquanet.com> <CAJ-VmonmH1vDqtL=Pu6sG53Ro-3DyC5QmtKtUJtvZmTDbM0Aug@mail.gmail.com> <CAJ-VmomfR5YQqaj8pYB80tLEdEcJjP0a%2B1tXqE6V1-Tpo7MLRQ@mail.gmail.com>
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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
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