Two type of event local and remote 1) locals are used by the periphs to postopone their work 2) remote are used to ask a work to done by another cluster. The users are: - sys_fork.c - kern/sys_thread_create.c - kern/thread_create.c - kern/thread_migrate.c - mm/vmm.c : vmm_broadcast_inval Never used!! - cluster.C : cluster_do_key_op Never used!! do_syscall & schedule notify the events also done by the thread manager (which is waked up by do_interrrupt) and thread idle