proc_pid_timerslack_ns(5) — Linux manual page

NAME | DESCRIPTION | SEE ALSO | COLOPHON

proc_pid_timerslack_ns(5)  File Formats Manual proc_pid_timerslack_ns(5)

NAME         top

       /proc/pid/timerslack_ns - timer slack in nanoseconds

DESCRIPTION         top

       /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         top

       proc(5)

COLOPHON         top

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Linux man-pages 6.9.1          2024-05-02      proc_pid_timerslack_ns(5)

Pages that refer to this page: PR_GET_TIMERSLACK(2const)PR_SET_TIMERSLACK(2const)