46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _LINUX_SCHED_PRIO_H
|
||
|
|
#define _LINUX_SCHED_PRIO_H
|
||
|
|
|
||
|
|
#define MAX_NICE 19
|
||
|
|
#define MIN_NICE -20
|
||
|
|
#define NICE_WIDTH (MAX_NICE - MIN_NICE + 1)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Priority of a process goes from 0..MAX_PRIO-1, valid RT
|
||
|
|
* priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
|
||
|
|
* tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority
|
||
|
|
* values are inverted: lower p->prio value means higher priority.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define MAX_RT_PRIO 100
|
||
|
|
|
||
|
|
#define MAX_PRIO (MAX_RT_PRIO + NICE_WIDTH)
|
||
|
|
#define DEFAULT_PRIO (MAX_RT_PRIO + NICE_WIDTH / 2)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Convert user-nice values [ -20 ... 0 ... 19 ]
|
||
|
|
* to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
|
||
|
|
* and back.
|
||
|
|
*/
|
||
|
|
#define NICE_TO_PRIO(nice) ((nice) + DEFAULT_PRIO)
|
||
|
|
#define PRIO_TO_NICE(prio) ((prio) - DEFAULT_PRIO)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Convert nice value [19,-20] to rlimit style value [1,40].
|
||
|
|
*/
|
||
|
|
static inline long nice_to_rlimit(long nice)
|
||
|
|
{
|
||
|
|
return (MAX_NICE - nice + 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Convert rlimit style value [1,40] to nice value [-20, 19].
|
||
|
|
*/
|
||
|
|
static inline long rlimit_to_nice(long prio)
|
||
|
|
{
|
||
|
|
return (MAX_NICE - prio + 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _LINUX_SCHED_PRIO_H */
|