diff options
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/sched.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 094b5687eef6..3399701c680e 100644 --- a/kernel/sched.c +++ b/kernel/sched.c | |||
@@ -160,15 +160,6 @@ | |||
160 | #define TASK_PREEMPTS_CURR(p, rq) \ | 160 | #define TASK_PREEMPTS_CURR(p, rq) \ |
161 | ((p)->prio < (rq)->curr->prio) | 161 | ((p)->prio < (rq)->curr->prio) |
162 | 162 | ||
163 | /* | ||
164 | * task_timeslice() scales user-nice values [ -20 ... 0 ... 19 ] | ||
165 | * to time slice values: [800ms ... 100ms ... 5ms] | ||
166 | * | ||
167 | * The higher a thread's priority, the bigger timeslices | ||
168 | * it gets during one round of execution. But even the lowest | ||
169 | * priority thread gets MIN_TIMESLICE worth of execution time. | ||
170 | */ | ||
171 | |||
172 | #define SCALE_PRIO(x, prio) \ | 163 | #define SCALE_PRIO(x, prio) \ |
173 | max(x * (MAX_PRIO - prio) / (MAX_USER_PRIO / 2), MIN_TIMESLICE) | 164 | max(x * (MAX_PRIO - prio) / (MAX_USER_PRIO / 2), MIN_TIMESLICE) |
174 | 165 | ||
@@ -180,6 +171,15 @@ static unsigned int static_prio_timeslice(int static_prio) | |||
180 | return SCALE_PRIO(DEF_TIMESLICE, static_prio); | 171 | return SCALE_PRIO(DEF_TIMESLICE, static_prio); |
181 | } | 172 | } |
182 | 173 | ||
174 | /* | ||
175 | * task_timeslice() scales user-nice values [ -20 ... 0 ... 19 ] | ||
176 | * to time slice values: [800ms ... 100ms ... 5ms] | ||
177 | * | ||
178 | * The higher a thread's priority, the bigger timeslices | ||
179 | * it gets during one round of execution. But even the lowest | ||
180 | * priority thread gets MIN_TIMESLICE worth of execution time. | ||
181 | */ | ||
182 | |||
183 | static inline unsigned int task_timeslice(struct task_struct *p) | 183 | static inline unsigned int task_timeslice(struct task_struct *p) |
184 | { | 184 | { |
185 | return static_prio_timeslice(p->static_prio); | 185 | return static_prio_timeslice(p->static_prio); |