Date: Fri, 20 Apr 2018 09:26:17 +0400 From: Hrant Dadivanyan <hrant@dadivanyan.net> To: freebsd-net@freebsd.org Subject: Re: Bad outbound performance with Intel 6205 [Taylor Peak] WiFi (IWN) Message-ID: <f333e877-85fa-155c-a564-3215eefc1d0c@dadivanyan.net> In-Reply-To: <CAN6yY1t2Zp9toyDmDbR3Sie4aJ4Ae9Kzi87xPQjpeBQ97itgDw@mail.gmail.com> References: <CAN6yY1t2Zp9toyDmDbR3Sie4aJ4Ae9Kzi87xPQjpeBQ97itgDw@mail.gmail.com>
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From: Hrant Dadivanyan <hrant@dadivanyan.net>
To: freebsd-net@freebsd.org
Message-ID: <f333e877-85fa-155c-a564-3215eefc1d0c@dadivanyan.net>
Subject: Re: Bad outbound performance with Intel 6205 [Taylor Peak] WiFi (IWN)
References: <CAN6yY1t2Zp9toyDmDbR3Sie4aJ4Ae9Kzi87xPQjpeBQ97itgDw@mail.gmail.com>
In-Reply-To: <CAN6yY1t2Zp9toyDmDbR3Sie4aJ4Ae9Kzi87xPQjpeBQ97itgDw@mail.gmail.com>
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On 04/20/18 06:37, Kevin Oberman wrote:
> I am seeing poor performance on my WiFi that seems to have deteriorated=
> since FreeBSD V11.0. I see an average of about 35 errors for every pack=
et
> transmitted.
> wlan0 1500 <Link#3> a0:88:b4:c6:ad:28 14501195 0 0 3676=
67
> 12886354 0
>=20
> I have always seen lot of errors on transmission on this interface, but=
I
> have recently noticed that uploads were very slow. They seem to max out=
at
> about 20 Mbps (bits, not bytes). For "normal" traffic (as opposed to te=
st
> traffic) it is often much worse, often topping out at around 2 or 3 Mbp=
s.
>=20
> No input errors at all and god download performance.
>=20
> Are others seeing this? Any suggestions for troubleshooting? I don't se=
e
> much in the way of statistics or diagnostic information on iwn. the man=
> page gives me no clues.>
iwn0@pci0:3:0:0: class=3D0x028000 card=3D0xc2208086 chip=3D0x00858=
086
rev=3D0x96 hdr=3D0x00
vendor =3D 'Intel Corporation'
device =3D 'Centrino Advanced-N 6205 [Taylor Peak]'
class =3D network
iwn0: <Intel Centrino Advanced-N 6205> mem 0xf0c00000-0xf0c01fff at
device 0.0 on pci2
Name Mtu Network Address Ipkts Ierrs Idrop
Ibytes Opkts Oerrs Obytes Coll
wlan0 1500 <Link#5> 84:3a:4b:cb:aa:c0 3914486 2 0
5523440357 7685 2087124 888555 0
The same 6205, I didn't notice bad upload performance though.
Numbers of Ipkts and Oerrs are close enough and Opkts is too small
compared to Ipkts, so I believe the driver misbehaves a bit and
erroneously shows number of output packets as Oerrs.
The Obytes also seems to be too small to be correct.
A few months ago the association with AP starts sometimes to stall with
no traffic in/out at all, reconfig in wpa_cli helps then. Looks like it
correlates with upgrade from 10-stable to 11, but I'm not so sure.
> Kevin Oberman, Part time kid herder and retired Network Engineer
> E-mail: rkoberman@gmail.com
> PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683
> _______________________________________________
> freebsd-net@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-net
> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
>=20
--=20
Hrant Dadivanyan (aka Ran d'Adi) hrant(at)dadivanyan.net
/* "Feci quod potui, faciant meliora potentes." */ ran(at)psg.com
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