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 exam-
ple:
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
notifications 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 either the string "tid" for timers with
SIGEV_THREAD_ID notification, or "pid" for timers that no-
tify 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 notifica-
tions via a signal.
ClockID
This field identifies the clock that the timer uses for
measuring 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
CONFIG_CHECKPOINT_RESTORE.
SEE ALSO
proc(5)
Linux man-pages 6.9.1 2024-05-02 proc_pid_timers(5)
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