[asterisk-ss7] Excessive poll issue with chanss7

Robert Thomas thomcr at gmail.com
Wed Jan 18 10:34:54 CST 2012

I spoke with Anders about this problem some time ago.

It's basically a driver overrun, the driver is been interrupted longer than
expected so it reports that it failed to run for X amount of time.

Although the driver can run as a kernel module, if a lot of IRQ are
happening ( due to the new cards ) the driver will still not get enough

There's some options you can change to make the D channel run in userspace
or kernel, depending on the perfomance of the server you might get
different results.

Basically you would need to deploy another BOX and stick to 2 SPAN per
server if you see those messages showing up.

On Tue, Jan 17, 2012 at 6:07 AM, Vallimamod ABDULLAH <
vallimamod.abdullah at imtelecom.fr> wrote:

> Hello List,
> I am using chan_ss7 with 2 ss7 span and 2 PRI spans (managed by
> chan_dahdi) on a Sangoma A104D card. When the 4 spans are connected, I get
> a lot of the following chan_ss7 errors:
> NOTICE[6626] mtp.c: Excessive poll delay 28412!
> NOTICE[6626] mtp.c: Full dahdi input buffer detected, incoming packets may
> have been lost on link 'l1' (count=64.
> NOTICE[6626] mtp.c: Empty Dahdi output buffer detected, outgoing packets
> may have been lost on link 'l1'.
> It happens also when there are no calls and only when the 4 spans are
> connected. I have used it for 2 years with only the 2 ss7 spans without
> problem. So I guess there is some load issue...
> Have you guys encountered this? Any hint on how I can solve it?
> I have upgraded to asterisk 1.8 and chan_ss7 2.1.1 on debian squeeze but
> without luck.
> Thank you!
> Best Regards,
> Vallimamod Abdullah
> .
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