Intel 82574L Gigabit Ethernet Controller

[Ian Smith]

On Wed, 7 Jul 2010, Shtorm wrote:
 > 
 > > Yow, 30 vlans, but only em1 is using vlans not em0?
 > > 
 > > Is only em1 having watchdogs? I noticed you appear to
 > > have flow control off, maybe turning it on would help.
 > > 
 > > I would like to see the log messages from the watchdogs.
 > > Jack
 > 
 > Yes, em0 - plain untagged traffic to border router, em1 - tagged - one
 > vlan per 200-300 pppoe clients. Anyway, I saw watchdogs on em0 too,
 > there is no logs for it because remote syslog server connected via em0
 > and it looses messages during card reset, will enable local logs to get
 > some info.
 > 
 > Log files are almost empty, is there any driver-specific debugging
 > options other than TUNABLE_INT("hw.em.sbp", &em_debug_sbp)? Anyway will
 > try to set it to 1 and wait for watchdog. 
 > 
 > Here is a part from log file I have now

Deleting the stuff you're most interested in :)

 > Jul  6 10:32:34 ntp info hostname x.x.x.8 ntpd  adjusting local clock by 5.083720s
 > Jul  6 10:33:07 ntp info hostname x.x.x.8 ntpd  adjusting local clock by 4.915903s
 > Jul  6 10:35:01 auth info hostname x.x.x.8 login  login on ttyv2 as root
 > Jul  6 10:35:01 auth notice hostname x.x.x.8 login  ROOT LOGIN (root) ON ttyv2
 > Jul  6 10:35:24 kern crit hostname x.x.x.8 kernel  em1: Watchdog timeout -- resetting
[..]
 > Jul  6 10:37:21 ntp info hostname x.x.x.8 ntpd  adjusting local clock by 3.641940s
 > Jul  6 10:37:46 kern crit hostname x.x.x.8 kernel  em1: Watchdog timeout -- resetting
[..]
 > Jul  6 10:38:40 kern crit hostname x.x.x.8 kernel  Limiting icmp unreach
 > response from 237 to 200 packets/sec
 > Jul  6 10:39:10 kern crit hostname x.x.x.8 kernel  em1: Watchdog timeout  > -- resetting

Probably completely unrelated, but I can't help noticing those big clock 
shifts by ntp over a short period amidst all this.  I don't know if that
could affect watchdogs, but is it a regular occurrence during these?

>From your latest, a bit more noise from ntp:

 > Jul  8 07:23:40 <kern.crit> server kernel: em0: Watchdog timeout -- resetting
[..]
 > Jul  8 07:23:56 <ntp.crit> server ntpd[3687]: 2 out of 3 peers valid
 > Jul  8 07:23:56 <ntp.crit> server ntpd[3687]: bad peer from pool pool.ntp.org (195.214.215.17)
 > Jul  8 07:27:15 <kern.crit> server kernel: em0: Watchdog timeout -- resetting

Ignore if not relevant.

cheers, Ian