Date: Tue, 3 Dec 2013 07:54:04 -0800 From: "R. Tyler Croy" <tyler@monkeypox.org> To: Adrian Chadd <adrian@freebsd.org> Cc: freebsd-wireless@freebsd.org Subject: Re: iwn(4) driver showing poor performance, variable media selection on 10.0-BETA3 Message-ID: <20131203155404.GG14900@kiwi.coupleofllamas.com> In-Reply-To: <CAJ-VmokVjS3X1SeH2XD8AOz3c1Bgms091W9XdiH-rD6%2B%2Bw1FFw@mail.gmail.com> References: <20131203074749.GE14900@kiwi.coupleofllamas.com> <CAJ-VmokVjS3X1SeH2XD8AOz3c1Bgms091W9XdiH-rD6%2B%2Bw1FFw@mail.gmail.com>
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On Tue, 03 Dec 2013, Adrian Chadd wrote:
> What's the pci id string? Pciconf -lv
iwn0@pci0:3:0:0: class=0x028000 card=0x12118086 chip=0x42378086 rev=0x00 hdr=0x00
vendor = 'Intel Corporation'
device = 'PRO/Wireless 5100 AGN [Shiloh] Network Connection'
class = network
> On Dec 2, 2013 11:48 PM, "R. Tyler Croy" <tyler@monkeypox.org> wrote:
>
> > I recently installed FreeBSD 10.0-BETA3 onto my Thinkpad X200, everything
> > is
> > largely running fine except the wireless performance leaves a lot to be
> > desired.
> >
> > I've got an older Thinkpad T43 running -CURRENT next to the X200 in the
> > same
> > exact room, same distance from the AP, but with an iwi(4) card in it.
> >
> > The T43 will download large files between 100-200KB/s, and the "media"
> > mode for
> > wlan0 is "OFDM/48Mbps" which seems non-crazy.
> >
> > The X200 however will get between 20-90KB/s on the same files, and the
> > "media"
> > mode will oscillate *dramatically* during the transfer. I've watched it go
> > from
> > OFDM/54Mbps, down to 48Mbps, to 16Mbps, to DS/1Mbps which is where it
> > seems to
> > idle.
> >
> > I've started looking at the output of wlanstats(1) and nothing jumps out
> > at me,
> > then again, I'm a noob so what do I know:
> >
> > [23:35:28] tyler:~ $ wlanstats
> > 8 rx frame too short
> > 30 rx from wrong bssid
> > 802156 rx discard 'cuz dup
> > 4 rx discard 'cuz mcast echo
> > 172272 rx beacon frames
> > 175177 rx element unknown
> > 996 rx frame chan mismatch
> > 61 rx seq# violation (TKIP)
> > 42 active scans started
> > 41 background scans started
> > 1072961 tkip crypto done in s/w
> > 405918 tkip tx MIC done in s/w
> > 667043 tkip rx MIC done in s/w
> > 173976 rx management frames
> > 667045 total data frames received
> > 663976 unicast data frames received
> > 3069 multicast data frames received
> > 406278 total data frames transmit
> > 405920 unicast data frames sent
> > 1M current transmit rate
> > 22 current rssi
> > -86 current noise floor (dBm)
> > -64 current signal (dBm)
> >
> > The only thing that looks removely suspicious is the "rx discard" segment,
> > but
> > again, I plead noob.
- R. Tyler Croy
------------------
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