In the Wiki, under "Performance testing and configurations", one of the suggestions given under "Recommended SIP Settings" is:
 
libsofia only handles 1 thread per profile, so if that is your bottle neck use more profiles
 
If I only have one Voip provider, can I still have more than one SIP profile?  My provider authenticates via IP.  I currently run 240 concurrent calls through this Sip trunk, I I see CPU close to 12.5% on a 8 core machine.  This means that one core is maxing out.  How can I get more threads up to distribute the load?
 
 

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Guillermo Ruiz Camauer