[Asterisk-Users] TE410P: Double/missed interrupt detected

[Rahul Arvind Jadhav]

hi,
    I have lately acquired a TE410P. The problem i face currently is 
that the span gets(or doesnt gets) UP in an uneven fashion i.e i have to 
load-unload the modules, wait for sometime and then start the 
application.... i dont know but this execise works well for me (though 
not neccassary that this works in first shot, but after retrying it 
somehow works). It is a tedious exercise and moreover i cannot manage to 
do it when i ve to use it in an auto-startup way i.e after a reboot the 
whole thing should come up by itself.
There is no evidence of any strange things happening except for the 
`Double/missed interrupt detected` shown in dmesg. `zttool` shows that 
the span status is OK.
Any thoughts on why i m getting such odd problems? Has anyone else faced 
the same problem (plz reply if u ve managed to fix it)?
Thanx,
Rahul

Mark Spencer wrote:

>>a.) In an effort to push Linux's poor job of handling interrupt
>>latancy, which makes it a not so good choice for real time systems
>>that the TE410 driver is simply pushing the limits a little.
>>Which is all right by me :)
>>    
>>
>Well, Zaptel needs to service interrupts once every 1000 microseconds.  If
>not, it misses a sample (not the end of the world, mind you).  No driver
>should leave interrupts disabled for anywhere *near* 1000 microseconds.
>If you need that long, put it in a bottom-half handler.
>
>>b.) The TE410 driver needs a little tweaking to play better
>>with others and handle it's interrupt requests better.
>>Which is all right by me too :)
>>    
>>
>If interrupts are disabled there is nothing we can do, except not
>interrupt as frequently, but this leads to additional latency.
>
>Mark
>