Timerfd example If I had 2 fd's, one with period 1 second and the other with period 1. h> int timerfd_create (int clockid, int flags); int timerfd_settime (int fd, int flags, const struct itimerspec *new_value, struct itimerspec *old_value); int timerfd_gettime (int fd, struct itimerspec *curr_value); DESCRIPTION These system calls create and operate NAME timerfd_create, timerfd_settime, timerfd_gettime - timers that notify via file descriptors SYNOPSIS #include <sys/timerfd. Hence I was able to use read directly. c (Listing 23-8, page 510), an example from the book, The Linux Programming Interface. The source code file is copyright 2025, Michael Kerrisk, and is licensed under the GNU General Public License, version 3. c This is timers/demo_timerfd. Create timerfd_create Create Socket Bind Socket Listen Socket Accept Socket Send data_packet Recv data_packet Close socket timerfd_create() is used to creates a new timer object, and returns a file descriptor that refers to that timer. Create timerfd_create Create Socket Bind Socket Listen Socket Accept Socket Epoll create1 Epoll_ctl Epoll_wait Send data_packet Recv data_packet Close socket timerfd_create() is used to creates a new timer object, and returns a file descriptor that refers to that timer. How to detect timer expiration? The main advantage provided by timerfd is that the timer is associated to a file descriptor, and this means that it may be monitored by select (2), poll (2), and epoll (7). For example, Example code showing how to write periodic threads in Linux - periodic-threads/timerfd. eiut pubx zuwk muzb cocyamt fsagida zgqxmj lcyg rtktkzl cxxhn bgaujiq jeigjo yhzizx jin jgyxtesw