Asterisk with dual core


I wonder how does asterisk benefits from the dual core processors or all simply, he does not use it because he is monothreaded?!!

FYI, i have done StressTest on asterisk on two machines : the first one was an Intel P4 and the second one was an Intel core 2 duo ,
conclusion : Number of call from one sip end to an other sip end was bigger in the first machine (Intel P4) than in the other one (Intel dual core)

Iā€™m waiting for your responses, :wink: