Date: Tue, 07 Nov 2006 23:57:44 +0300 From: "Marat N.Afanasyev" <amarat@ksu.ru> To: freebsd-net@FreeBSD.ORG, amarat@ksu.ru Subject: Re: a very strange netstat output and problem when using transparent proxy Message-ID: <4550F348.8040509@ksu.ru> In-Reply-To: <200611072019.kA7KJsAm073276@lurza.secnetix.de> References: <200611072019.kA7KJsAm073276@lurza.secnetix.de>
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Oliver Fromme wrote:
> Marat N.Afanasyev wrote:
> > bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>
> Ok, I also have a machine with bge(4) NIC within reach.
> I've had a look at it for similar symptoms (see below).
>
> > bge0 1500 <Link#1> 00:50:45:5f:4f:78 2341018 799 3062828
> > 0 0
>
> 799 is not good, but I wouldn't call it "huge amount of
> ierrs". Is that a typical number, or was that output
> taken before the problem (network freeze) appears?
more typical is the following:
% netstat -I bge0 -w 60
input (bge0) output
packets errs bytes packets errs bytes colls
151993 241 111011660 172436 0 120848541 0
169867 388 118858096 192997 0 135783627 0
130524 407 91213775 145884 0 110857756 0
327168 1637 214730921 397193 0 275486626 0
385627 1027 254274520 471177 0 333456526 0
300184 720 198432049 367100 0 271325679 0
261095 5525 166910652 324112 0 251708900 0
278257 11998 176453071 349975 0 268865328 0
314383 8617 203347024 393589 0 301819857 0
195408 11647 129989509 246718 0 195720356 0
7163 23787 6087244 13165 0 7694485 0
2485 24786 1743165 6571 0 4015170 0
2202 26175 1117627 6225 0 3992217 0
and oops. none of two interfaces can any more process any incoming
packet. ping drops increase to 99%
>
> > % uptime
> > 7:34PM up 40 mins, 3 users, load averages: 0.14, 0.16, 0.08
>
> Ok, 799 ierrs after 40 minuted uptime is definitely not
> good. :-)
>
> > Real IP address. I've already switched forward off and make squid listen
> > on 80 instead. Problem persists.
>
> OK, so it's a NIC problem, not IPFW-related.
>
> Here's output from my machine with bge(4) NIC:
>
> Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
> bge0 1500 <Link#1> 00:16:35:... 7808595 35 3451475 0 0
>
> Uptime is 8 days, the machine is only moderately loaded,
> but gets quite some amount of NFS traffic (as a client).
> OS is FreeBSD 6.2-PRELELEASE as of October 19th.
as I said before, this problem persists on all my machines with 5704.
> Whie 35 ierrs in 8 days isn't much, I think it still
> indicates a problem somewhere. It should really be 0.
> (I haven't experienced any freezes or other problems,
> though.)
>
> Maybe you should ask on the -stable mailing list for
> others with bge(4) NICs to check. It looks like a bug
> in the driver.
>
> Oh by the way, do you have polling enabled? Try to
> switch in on (if disabled) or off (if enabled) and check
> whether it improves the situation for you.
>
> Best regards
> Oliver
>
polling cannot be "safely" turned on smp, without eating a lot of cpu to
interrupt processing. So, I run away from polling.
--
SY, Marat
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