[asterisk-ss7] dahdi chunk_size chan_ss7

[Ngo-Vi Hoai-Anh]

Dear folk,

I've found this interesting document 
http://www.sangoma.com/assets/docs/misc/2009_10_09_How_to_Reduce_Asterisk_System_Loads.pdf.

After having read it I've tried to set chunk size to 40 for using 
sangoma + chan_ss7. But it doesn't work. Chan_ss7 seems not to be able 
able to setup link on mtp level. I got this permanently:

[Mar 12 11:00:13] NOTICE[1379] mtp.c: Initialising 1 signalling links
[Mar 12 11:00:13] VERBOSE[1582] logger.c:     -- Starting MTP thread,
pid=21111.
[Mar 12 11:00:13] VERBOSE[1583] logger.c:     -- Starting monitor
thread, pid=21111.
[Mar 12 11:00:13] NOTICE[1583] mtp.c: Initialising link 'l1/16', linkset
'siuc', sls 0.
[Mar 12 11:00:13] NOTICE[1583] mtp.c: Signalling channel on link 'l1/16'
has signalling type 0x0080.
[Mar 12 11:00:13] DEBUG[1583] mtp.c: Starting initial alignment on link
'l1', reason: Initial.
[Mar 12 11:00:13] NOTICE[1583] mtp.c: Empty Dahdi output buffer
detected, outgoing packets may have been lost on link 'l1'.
[Mar 12 11:00:13] VERBOSE[1379] logger.c:     -- SS7 channel loaded
successfully.
[Mar 12 11:00:13] VERBOSE[1379] logger.c:  Loaded chan_ss7.so => (SS7
Protocol Support)
[Mar 12 11:00:13] DEBUG[1583] mtp.c: Entering proving state for link 'l1'.
[Mar 12 11:00:13] DEBUG[1583] mtp.c: Aborted initial alignment on link 'l1'.
[Mar 12 11:00:14] NOTICE[1583] mtp.c: Excessive poll delay 5163!
[Mar 12 11:00:14] NOTICE[1583] mtp.c: Excessive poll delay 5155!
[Mar 12 11:00:14] DEBUG[1583] mtp.c: link l1
[Mar 12 11:00:14] DEBUG[1583] mtp.c: Starting initial alignment on link
'l1', reason: t17_timeout.
[Mar 12 11:00:14] DEBUG[1583] mtp.c: Entering proving state for link 'l1'.
[Mar 12 11:00:14] DEBUG[1583] mtp.c: Aborted initial alignment on link 'l1'.
[Mar 12 11:00:16] DEBUG[1583] mtp.c: link l1
[Mar 12 11:00:16] DEBUG[1583] mtp.c: Starting initial alignment on link
'l1', reason: t17_timeout.
[Mar 12 11:00:16] DEBUG[1583] mtp.c: Entering proving state for link 'l1'.
[Mar 12 11:00:16] DEBUG[1583] mtp.c: Aborted initial alignment on link 'l1'.
[Mar 12 11:00:17] DEBUG[1583] mtp.c: link l1
[Mar 12 11:00:17] DEBUG[1583] mtp.c: Starting initial alignment on link

...

Has someone already struggled with the same problem? Is there any patch 
for this?

Thank you
Hoai-Anh