Intel em0: watchdog timeout

[Kirk Davis]

> -----Original Message-----
> From: Mike Tancsa [mailto:mike at sentex.net] 
> Subject: Re: Intel em0: watchdog timeout
> 
> At 03:46 PM 2/22/2010, Kirk Davis wrote:
> >Does this need to be done in loader.conf?  It doesn't seem 
> to take from
> >the command line.
> ># sysctl dev.em.2.stats=1
> >dev.em.2.stats: -1 -> -1
> >
> ># sysctl dev.em.2.stats
> >dev.em.2.stats: -1
> 
> Hi,
>          After you issue those commands, the driver will spit out a 
> lot of useful stats to syslog. It will report something like the 
> following in /var/log/messages
> 
> Feb 22 16:06:31 offsite kernel: em0: Excessive collisions = 0
> Feb 22 16:06:31 offsite kernel: em0: Sequence errors = 0
> Feb 22 16:06:31 offsite kernel: em0: Defer count = 0
> Feb 22 16:06:31 offsite kernel: em0: Missed Packets = 0
> Feb 22 16:06:31 offsite kernel: em0: Receive No Buffers = 0
> Feb 22 16:06:31 offsite kernel: em0: Receive Length Errors = 0
> Feb 22 16:06:31 offsite kernel: em0: Receive errors = 0
> Feb 22 16:06:31 offsite kernel: em0: Crc errors = 0
> Feb 22 16:06:31 offsite kernel: em0: Alignment errors = 0
> Feb 22 16:06:31 offsite kernel: em0: Collision/Carrier 
> extension errors = 0
> Feb 22 16:06:31 offsite kernel: em0: RX overruns = 0
> Feb 22 16:06:31 offsite kernel: em0: watchdog timeouts = 0
> Feb 22 16:06:31 offsite kernel: em0: RX MSIX IRQ = 0 TX MSIX IRQ = 0 
> LINK MSIX IRQ = 0
> Feb 22 16:06:31 offsite kernel: em0: XON Rcvd = 0
> Feb 22 16:06:31 offsite kernel: em0: XON Xmtd = 0
> Feb 22 16:06:31 offsite kernel: em0: XOFF Rcvd = 0
> Feb 22 16:06:31 offsite kernel: em0: XOFF Xmtd = 0
> Feb 22 16:06:31 offsite kernel: em0: Good Packets Rcvd = 2559032551
> Feb 22 16:06:31 offsite kernel: em0: Good Packets Xmtd = 1568751141
> Feb 22 16:06:31 offsite kernel: em0: TSO Contexts Xmtd = 0
> Feb 22 16:06:31 offsite kernel: em0: TSO Contexts Failed = 0

Thanks Mike and Jack.  I don't know why I didn'ty notice the output in
/var/log/messages

Here is the output for the two interfaces that are causing this issue.

Feb 22 13:33:52 inet-gw kernel: em0: Excessive collisions = 0
Feb 22 13:33:52 inet-gw kernel: em0: Sequence errors = 0
Feb 22 13:33:52 inet-gw kernel: em0: Defer count = 0
Feb 22 13:33:52 inet-gw kernel: em0: Missed Packets = 24296
Feb 22 13:33:52 inet-gw kernel: em0: Receive No Buffers = 0
Feb 22 13:33:52 inet-gw kernel: em0: Receive Length Errors = 0
Feb 22 13:33:52 inet-gw kernel: em0: Receive errors = 0
Feb 22 13:33:52 inet-gw kernel: em0: Crc errors = 0
Feb 22 13:33:52 inet-gw kernel: em0: Alignment errors = 0
Feb 22 13:33:52 inet-gw kernel: em0: Collision/Carrier extension errors
= 0
Feb 22 13:33:52 inet-gw kernel: em0: RX overruns = 0
Feb 22 13:33:52 inet-gw kernel: em0: watchdog timeouts = 6
Feb 22 13:33:52 inet-gw kernel: em0: RX MSIX IRQ = 0 TX MSIX IRQ = 0
LINK MSIX IRQ = 0
Feb 22 13:33:52 inet-gw kernel: em0: XON Rcvd = 0
Feb 22 13:33:52 inet-gw kernel: em0: XON Xmtd = 0
Feb 22 13:33:52 inet-gw kernel: em0: XOFF Rcvd = 0
Feb 22 13:33:52 inet-gw kernel: em0: XOFF Xmtd = 0
Feb 22 13:33:52 inet-gw kernel: em0: Good Packets Rcvd = 424303810
Feb 22 13:33:52 inet-gw kernel: em0: Good Packets Xmtd = 576529136
Feb 22 13:33:52 inet-gw kernel: em0: TSO Contexts Xmtd = 0
Feb 22 13:33:52 inet-gw kernel: em0: TSO Contexts Failed = 0
Feb 22 13:34:12 inet-gw kernel: em2: Excessive collisions = 0
Feb 22 13:34:12 inet-gw kernel: em2: Sequence errors = 0
Feb 22 13:34:12 inet-gw kernel: em2: Defer count = 20
Feb 22 13:34:12 inet-gw kernel: em2: Missed Packets = 68059
Feb 22 13:34:12 inet-gw kernel: em2: Receive No Buffers = 275612
Feb 22 13:34:12 inet-gw kernel: em2: Receive Length Errors = 0
Feb 22 13:34:12 inet-gw kernel: em2: Receive errors = 0
Feb 22 13:34:12 inet-gw kernel: em2: Crc errors = 0
Feb 22 13:34:12 inet-gw kernel: em2: Alignment errors = 0
Feb 22 13:34:12 inet-gw kernel: em2: Collision/Carrier extension errors
= 0
Feb 22 13:34:12 inet-gw kernel: em2: RX overruns = 17
Feb 22 13:34:12 inet-gw kernel: em2: watchdog timeouts = 38
Feb 22 13:34:12 inet-gw kernel: em2: RX MSIX IRQ = 0 TX MSIX IRQ = 0
LINK MSIX IRQ = 0
Feb 22 13:34:12 inet-gw kernel: em2: XON Rcvd = 21
Feb 22 13:34:12 inet-gw kernel: em2: XON Xmtd = 8344
Feb 22 13:34:12 inet-gw kernel: em2: XOFF Rcvd = 30
Feb 22 13:34:12 inet-gw kernel: em2: XOFF Xmtd = 9159
Feb 22 13:34:12 inet-gw kernel: em2: Good Packets Rcvd = 713607509
Feb 22 13:34:12 inet-gw kernel: em2: Good Packets Xmtd = 569694020
Feb 22 13:34:12 inet-gw kernel: em2: TSO Contexts Xmtd = 0
Feb 22 13:34:12 inet-gw kernel: em2: TSO Contexts Failed = 0
Feb 22 13:35:10 inet-gw kernel: em2: Excessive collisions = 0
Feb 22 13:35:10 inet-gw kernel: em2: Sequence errors = 0
Feb 22 13:35:10 inet-gw kernel: em2: Defer count = 20
Feb 22 13:35:10 inet-gw kernel: em2: Missed Packets = 68059
Feb 22 13:35:10 inet-gw kernel: em2: Receive No Buffers = 275612
Feb 22 13:35:10 inet-gw kernel: em2: Receive Length Errors = 0
Feb 22 13:35:10 inet-gw kernel: em2: Receive errors = 0
Feb 22 13:35:10 inet-gw kernel: em2: Crc errors = 0
Feb 22 13:35:10 inet-gw kernel: em2: Alignment errors = 0
Feb 22 13:35:10 inet-gw kernel: em2: Collision/Carrier extension errors
= 0
Feb 22 13:35:10 inet-gw kernel: em2: RX overruns = 17
Feb 22 13:35:10 inet-gw kernel: em2: watchdog timeouts = 38
Feb 22 13:35:10 inet-gw kernel: em2: RX MSIX IRQ = 0 TX MSIX IRQ = 0
LINK MSIX IRQ = 0
Feb 22 13:35:10 inet-gw kernel: em2: XON Rcvd = 21
Feb 22 13:35:10 inet-gw kernel: em2: XON Xmtd = 8344
Feb 22 13:35:10 inet-gw kernel: em2: XOFF Rcvd = 30
Feb 22 13:35:10 inet-gw kernel: em2: XOFF Xmtd = 9159
Feb 22 13:35:10 inet-gw kernel: em2: Good Packets Rcvd = 715555016
Feb 22 13:35:10 inet-gw kernel: em2: Good Packets Xmtd = 571157561
Feb 22 13:35:10 inet-gw kernel: em2: TSO Contexts Xmtd = 0
Feb 22 13:35:10 inet-gw kernel: em2: TSO Contexts Failed = 0
Feb 22 13:39:12 inet-gw kernel: em2: Excessive collisions = 0
Feb 22 13:39:12 inet-gw kernel: em2: Sequence errors = 0
Feb 22 13:39:12 inet-gw kernel: em2: Defer count = 20
Feb 22 13:39:12 inet-gw kernel: em2: Missed Packets = 68059
Feb 22 13:39:12 inet-gw kernel: em2: Receive No Buffers = 275612
Feb 22 13:39:12 inet-gw kernel: em2: Receive Length Errors = 0
Feb 22 13:39:12 inet-gw kernel: em2: Receive errors = 0
Feb 22 13:39:12 inet-gw kernel: em2: Crc errors = 0
Feb 22 13:39:12 inet-gw kernel: em2: Alignment errors = 0
Feb 22 13:39:12 inet-gw kernel: em2: Collision/Carrier extension errors
= 0
Feb 22 13:39:12 inet-gw kernel: em2: RX overruns = 17
Feb 22 13:39:12 inet-gw kernel: em2: watchdog timeouts = 38
Feb 22 13:39:12 inet-gw kernel: em2: RX MSIX IRQ = 0 TX MSIX IRQ = 0
LINK MSIX IRQ = 0
Feb 22 13:39:12 inet-gw kernel: em2: XON Rcvd = 21
Feb 22 13:39:12 inet-gw kernel: em2: XON Xmtd = 8344
Feb 22 13:39:12 inet-gw kernel: em2: XOFF Rcvd = 30
Feb 22 13:39:12 inet-gw kernel: em2: XOFF Xmtd = 9159
Feb 22 13:39:12 inet-gw kernel: em2: Good Packets Rcvd = 723521981
Feb 22 13:39:12 inet-gw kernel: em2: Good Packets Xmtd = 577211431
Feb 22 13:39:12 inet-gw kernel: em2: TSO Contexts Xmtd = 0
Feb 22 13:39:12 inet-gw kernel: em2: TSO Contexts Failed = 0


Can this be the problem? "Receive No Buffers = 275612"

---- Kirk
Kirk Davis
Senior Network Analyst, ITS
Edmonton Public Schools
One Kingsway Ave. 
Edmonton, Alberta, Canada
T5H 4G9
phone: 1-780-429-8308