plucky (5) proc_pid_timerslack_ns.5.gz

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 capability is required to access this file.

SEE ALSO

       proc(5)