Subject: RE: interrupt storm
To: Bronstein Dan <D.Bronstein@flarion.com>
From: Matt Thomas <matt@3am-software.com>
List: tech-embed
Date: 03/25/2004 15:24:02
At 03:09 PM 3/25/2004, Bronstein Dan wrote:
>I compiled the ethernet interface with event countered enabled.
>The following is from vmstat.
>
>event total rate type
>wm0 txdw 2008 0 intr
>wm0 rxintr 29948 11 intr
>wm0 linkintr 2 0 intr
>wm0 txseg1 2426 0 misc
>wm0 txseg2 43 0 misc
>wm0 txseg3 12 0 misc
>
>I haven't added any dynamic system event counters to the wan driver,
>but I did add some interrupt counters that I check from ddb. The
>actual processing (handling) of the wan interrupts is very low, but
>the count that gets updated on entry into the interrupt handler is
>exceedingly high after enabling one of the t1 ports. Once the port
>is enabled, the only thing I can do is to break into the kernel
>debugger since it seems like nothing else is happening other than pci
>Int11's. BTW.. I did check the ethernet event counts from ddb and
>they're reasonable.
from ddb
db> show event
What platform is this on?
--
Matt Thomas email: matt@3am-software.com
3am Software Foundry www: http://3am-software.com/bio/matt/
Cupertino, CA disclaimer: I avow all knowledge of this message.