proc_pid_timers(5)	       File Formats Manual	      proc_pid_timers(5)

NAME
     /proc/pid/timers - POSIX timers

DESCRIPTION
     /proc/pid/timers (since Linux 3.10)
	    A  list  of the POSIX timers for this process.  Each timer is listed
	    with a line that starts with the string "ID:".  For example:

		ID: 1
		signal: 60/00007fff86e452a8
		notify: signal/pid.2634
		ClockID: 0
		ID: 0
		signal: 60/00007fff86e452a8
		notify: signal/pid.2634
		ClockID: 1

	    The lines shown for each timer have the following meanings:

	    ID	   The ID for this timer.  This is not the same as the timer  ID
		   returned  by	 timer_create(2); rather, it is the same kernel-
		   internal ID that is available via the si_timerid field of the
		   siginfo_t structure (see sigaction(2)).

	    signal
		   This is the signal number that this timer uses to deliver no-
		   tifications followed by a slash,  and  then	the  sigev_value
		   value  supplied to the signal handler.  Valid only for timers
		   that notify via a signal.

	    notify
		   The part before the slash specifies the mechanism  that  this
		   timer  uses to deliver notifications, and is one of "thread",
		   "signal", or "none".	 Immediately following the slash is  ei-
		   ther the string "tid" for timers with SIGEV_THREAD_ID notifi-
		   cation,  or "pid" for timers that notify by other mechanisms.
		   Following the "." is the PID of the process	(or  the  kernel
		   thread  ID of the thread)  that will be delivered a signal if
		   the timer delivers notifications via a signal.

	    ClockID
		   This field identifies the clock that the timer uses for  mea-
		   suring  time.  For most clocks, this is a number that matches
		   one of the user-space CLOCK_* constants exposed via <time.h>.
		   CLOCK_PROCESS_CPUTIME_ID timers display with a value of -6 in
		   this field.	CLOCK_THREAD_CPUTIME_ID timers	display	 with  a
		   value of -2 in this field.

	    This file is available only when the kernel was configured with CON-
	    FIG_CHECKPOINT_RESTORE.

SEE ALSO
     proc(5)

Linux man-pages 6.18		   2026-02-08		      proc_pid_timers(5)