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Command: nice | Section: 2 | Source: UNIX v10 | File: nice.2
NICE(2) System Calls Manual NICE(2)
NAME
nice - set program priority
SYNOPSIS
void nice(incr)
DESCRIPTION
The scheduling priority of the process is augmented by incr. Positive
priorities get less service than normal. Priority 10 is recommended to
users who wish to execute long-running programs without flak from the
administration. Priority 19 is recommended for programs that should
only execute in ``idle'' time.
Only the super-user can effect negative increments. Priorities less
than -20 (most urgent) are treated as -20. Priorities greater than 19
are treated as 19.
The priority of a process is passed to a child process by fork(2). For
a privileged process to return to normal priority from an unknown
state, nice should be called successively with arguments -40 (goes to
priority -20 because of truncation), then 20 (to get to 0).
SEE ALSO
nice(1), fork(2)
NICE(2)