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nice - set program priority
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.
Negative increments are ignored except on behalf of the super-user. The priority is lim-
ited to the range -20 (most urgent) to 20 (least).
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 succes-
sively with arguments -40 (goes to priority -20 because of truncation), 20 (to get to 0),
then 0 (to maintain compatibility with previous versions of this call).
(nice = 34.)
(priority in r0)
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