Re: [sr-dev] [kamailio/kamailio] Enabling DMQ cause high CPU usage (#822)

Kamailio is using spin locks (for mutexes) and that can cause high cpu on some systems. I am not very familair with dmq internals, but it looks like it uses mutexes to trigger the presence of a new task for its worker processes, meaning that a worker stays in mutex-get operation (spinning), until a new task arrives. Maybe @charlesrchance can shed more light here. Of course, this high cpu can show up in case of a deadlock, but if you say all works fine whether there is traffic to handle, then is not a deadlock. The option is to compile to use POSIX semaphores -- the Makefile.defs needs to be changed and all recompiled. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/822#issuecomment-253731497