| 1 | .TH NICE 2 |
| 2 | .SH NAME |
| 3 | nice \- set program priority |
| 4 | .SH SYNOPSIS |
| 5 | .B nice(incr) |
| 6 | .SH DESCRIPTION |
| 7 | The scheduling |
| 8 | priority of the process is augmented by |
| 9 | .IR incr . |
| 10 | Positive priorities get less |
| 11 | service than normal. |
| 12 | Priority 10 is recommended to users |
| 13 | who wish to execute long-running programs |
| 14 | without flak from the administration. |
| 15 | .PP |
| 16 | Negative increments are ignored except on behalf of |
| 17 | the super-user. |
| 18 | The priority is limited to the range |
| 19 | \-20 (most urgent) to 20 (least). |
| 20 | .PP |
| 21 | The priority of a process is |
| 22 | passed to a child process by |
| 23 | .IR fork (2). |
| 24 | For a privileged process to return to normal priority |
| 25 | from an unknown state, |
| 26 | .I nice |
| 27 | should be called successively with arguments |
| 28 | \-40 (goes to priority \-20 because of truncation), |
| 29 | 20 (to get to 0), |
| 30 | then 0 (to maintain compatibility with previous versions |
| 31 | of this call). |
| 32 | .SH "SEE ALSO" |
| 33 | nice(1) |
| 34 | .SH "ASSEMBLER (PDP-11)" |
| 35 | (nice = 34.) |
| 36 | .br |
| 37 | (priority in r0) |
| 38 | .br |
| 39 | .B sys nice |