NAME
nice - set program priority
SYNOPSIS
(nice = 34.)
(priority in r0)
sys nice
nice(priority)
DESCRIPTION
The scheduling priority of the process is changed to the
argument. Positive priorities get less service than normal;
0 is default. Only the super-user may specify a negative
priority. The valid range of priority is 20 to -220. The
value of 4 is recommended to users who wish to execute
long-running programs without flak from the administration.
The effect of this call is passed to a child process by the
fork system call. The effect can be cancelled by another
call to nice with a priority of 0.
The actual running priority of a process is the priority
argument plus a number that ranges from 100 to 119 depending
on the cpu usage of the process.
SEE ALSO
nice (I)
DIAGNOSTICS
The error bit (c-bit) is set if the user requests a priority
outside the range of 0 to 20 and is not the super-user.
1