Hi.. > 1. When I call pthread_create(), which system call will be fired , is > it clone()?? Hint: use strace to find out :) > 2. Can i change priority of threads individually using chrt or nice > ?? Never did by myself, but I believe it is doable. regards, Mulyadi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/