[c-nsp] Has anyone run into this error: %SYS-4-CHUNKMALLOCFAIL

[Rodney Dunn]

On Thu, Oct 25, 2007 at 04:47:10PM +1000, Matt Carter wrote:
> Firstly, I'm no expert in Cisco buffers, but it seems you have failures all
> the way up to and including the Huge buffer pool, which I would think is
> most certainly going to result in packet drop.

Yes. But those buffers are *only* for process switched packets.
We call them "system buffers". Transient packets being forwarded
under interrupt use private particle pools and are not impacted
for those packets.

> 
> Secondly, I did come across a bug which looks awefully like the message you
> are seeing.
> 
> 006349: Jul 24 00:08:56.164 AEST: %SYS-4-CHUNKMALLOCFAIL: Could not allocate
> chunks for CEF: arp throt
> Total free: 0, Total inuse: 500, Cause : Not a dynamic chunk
>  -Process= "<interrupt level>", ipl= 1 -Traceback= 0x60635A94 0x60799A98
> 0x60799AFC 0x614551D8 0x614950A8 0x6016FC94 0x60173F28 0x6084085C 0x60773520

This is some punt protection changes that were put in place.

> 
> TAC response was i was being affected by bug CSCsj25679

Yep. That's the right bug.

> 
> Symptom: %SYS-2-CHUNKMALLOCFAIL messages on c7200 router while sending
> traffic
> 
> Conditions: %SYS-2-CHUNKMALLOCFAIL messages on c7200 router can be seen
> while box is so much stress with traffic with higher size of packets.
> (>=512bytes)
>  
> Workaround: There is no workaround. These messages not impacting any service
> like traffic and sessions drop.
> 
> Hi Matt,
> 
> The bug was first found in version 12.4(13.13)T6 and was first fixed in
> 12.4(16.13).
> 
> The developer of CSCsj25679 confirmed that your issue is the same with the
> bug.  However, he still haven't verified the mainline release on which this
> bug was first found.
> 
> <...>
> 
> By the way, developer informed me that CSCsj25679 was first seen in
> 12.4(13.10).
> 
> 
> > >
> > > >   I just recently installed a new 7206VXR/NPE-G2 router, and looking
> > at
> > > > the logging output I am seeing the following:
> > > >
> > > > Oct 23 11:27:51.705 EDT: %SYS-4-CHUNKMALLOCFAIL: Could not allocate
> > > > chunks for
> > > > CEF: arp throt
> > > > Total free: 0, Total inuse: 500, Cause : Not a dynamic chunk
> > > >  -Process= "<interrupt level>", ipl= 1, pid= 77,  -Traceback=
> > 0x13D5688
> > > > 0x20974 0x20428 0x172B074 0x8BB14 0x686EFC 0x68AAD0 0x682A84 0x66D44C
> > > > 0x66C328
> > > > 0x671D50 0x66DA90 0x66C3E4 0x19DDCB4 0x19DDA3C 0x19DB0EC
> > >
> 
> 
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