man > proc_pid_timerslack_ns(5)

proc_pid_timerslack_ns(5)                File Formats Manual               proc_pid_timerslack_ns(5)

NAME
       /proc/pid/timerslack_ns - timer slack in nanoseconds

DESCRIPTION
       /proc/pid/timerslack_ns (since Linux 4.6)
              This file exposes the process's "current" timer slack value, expressed in nanoseconds.
              The file is writable, allowing the process's timer slack value to be changed.  Writing
              0  to  this  file resets the "current" timer slack to the "default" timer slack value.
              For further details, see the discussion of PR_SET_TIMERSLACK in prctl(2).

              Initially, permission to access this  file  was  governed  by  a  ptrace  access  mode
              PTRACE_MODE_ATTACH_FSCREDS  check  (see  ptrace(2)).   However,  this was subsequently
              deemed too strict a requirement (and had the side effect that requiring a  process  to
              have  the  CAP_SYS_PTRACE  capability  would  also  allow  it  to  view and change any
              process's memory).  Therefore, since Linux 4.9, only the (weaker)  CAP_SYS_NICE  capa‐
              bility is required to access this file.

SEE ALSO
       proc(5)

Linux man-pages 6.7                          2023-08-15                    proc_pid_timerslack_ns(5)