diff options
Diffstat (limited to 'sys/kern/sched_ule.c')
| -rw-r--r-- | sys/kern/sched_ule.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/sys/kern/sched_ule.c b/sys/kern/sched_ule.c index 3932c6c..9e01ef8 100644 --- a/sys/kern/sched_ule.c +++ b/sys/kern/sched_ule.c @@ -124,23 +124,22 @@ struct p_sched *proc0_sched = NULL; struct td_sched *thread0_sched = &td_sched; /* - * This priority range has 20 priorities on either end that are reachable - * only through nice values. + * The priority is primarily determined by the interactivity score. Thus, we + * give lower(better) priorities to kse groups that use less CPU. The nice + * value is then directly added to this to allow nice to have some effect + * on latency. * * PRI_RANGE: Total priority range for timeshare threads. - * PRI_NRESV: Reserved priorities for nice. + * PRI_NRESV: Number of nice values. * PRI_BASE: The start of the dynamic range. - * DYN_RANGE: Number of priorities that are available int the dynamic - * priority range. */ #define SCHED_PRI_RANGE (PRI_MAX_TIMESHARE - PRI_MIN_TIMESHARE + 1) #define SCHED_PRI_NRESV PRIO_TOTAL #define SCHED_PRI_NHALF (PRIO_TOTAL / 2) #define SCHED_PRI_NTHRESH (SCHED_PRI_NHALF - 1) -#define SCHED_PRI_BASE ((SCHED_PRI_NRESV / 2) + PRI_MIN_TIMESHARE) -#define SCHED_DYN_RANGE (SCHED_PRI_RANGE - SCHED_PRI_NRESV) +#define SCHED_PRI_BASE (PRI_MIN_TIMESHARE) #define SCHED_PRI_INTERACT(score) \ - ((score) * SCHED_DYN_RANGE / SCHED_INTERACT_MAX) + ((score) * SCHED_PRI_RANGE / SCHED_INTERACT_MAX) /* * These determine the interactivity of a process. |
