Should a "watchdog" be an internal part of the Asterisk core?
The problem is generic. I.e. any real time process may swamp a machine, and therefor it is not Asterisk specific.
arve5
>This is a problem that can be solved in asterisk, though, with a watchdog, and/or something more elegant. I've >implemented this in iaxclient (it gets used automatically if you use iaxclient as root on linux), and it should be done for >asterisk as well.
>See http://bugs.digium.com/bug_view_page.php?bug_id=0003203
>If this is implemented in asterisk, and asterisk swamps your machine for more than N seconds (where N is 4, for example), >the real-timedness of asterisk goes away..
Arve5
Steve Kann wrote:
Gilad Ben-Yossef wrote:
This is a problem that can be solved in asterisk, though, with a watchdog, and/or something more elegant. I've implemented this in iaxclient (it gets used automatically if you use iaxclient as root on linux), and it should be done for asterisk as well.Justin Carlson wrote:
what is wrong with running asterisk with the -pg flags at startup?
Which is exactly what I suggested:
Since VoIP is a real time activity, simple "nice" really isn't enough. What you should do is mark the Asterisk proccess as a real time task for the Linux kernel to schedule accordingly. You can do this with Asterisk by passing the "-p" option to the Asterisk command line.
And the warning still holds:
A warning is due here: real time priority scheduled tasks are not something to be toyed with. You need to be root to be able to turn on this feature (meaning you have to be running Asterisk as root). A bug in Asterisk, a problem with mpg123 or a red alert on a FXO card can very well leave your system completly non responsive - so use with care.
Having said that, I've been running an Asterisk server on a machine which is also used as SOHO firewall and file server for year now and it works great.
See http://bugs.digium.com/bug_view_page.php?bug_id=0003203
If this is implemented in asterisk, and asterisk swamps your machine for more than N seconds (where N is 4, for example), the real-timedness of asterisk goes away..
-SteveK
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