Messages in this thread Patch in this message | | | From | Con Kolivas <> | Subject | Re: [PATCH] sleep_decay for interactivity 2.5.72 - testers needed | Date | Fri, 20 Jun 2003 02:06:00 +1000 |
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On Fri, 20 Jun 2003 02:02, Con Kolivas wrote: > On Fri, 20 Jun 2003 01:47, Mike Galbraith wrote: > > At 12:05 AM 6/20/2003 +1000, Con Kolivas wrote: > > >Testers required. A version for -ck will be created soon. > > > > That idea definitely needs some refinement. > > Actually no it needs a bugfix even more than a refinement! > > The best_sleep_decay should be 60, NOT 60*Hz
Here's a fixed patch.
Con diff -Naurp linux-2.5.72/kernel/sched.c linux-2.5.72-test/kernel/sched.c --- linux-2.5.72/kernel/sched.c 2003-06-18 22:47:25.000000000 +1000 +++ linux-2.5.72-test/kernel/sched.c 2003-06-19 22:23:33.000000000 +1000 @@ -72,7 +72,8 @@ #define EXIT_WEIGHT 3 #define PRIO_BONUS_RATIO 25 #define INTERACTIVE_DELTA 2 -#define MAX_SLEEP_AVG (10*HZ) +#define MAX_SLEEP_AVG (HZ) +#define BEST_SLEEP_DECAY (60) #define STARVATION_LIMIT (10*HZ) #define NODE_THRESHOLD 125 @@ -318,7 +319,7 @@ static int effective_prio(task_t *p) if (rt_task(p)) return p->prio; - bonus = MAX_USER_PRIO*PRIO_BONUS_RATIO*p->sleep_avg/MAX_SLEEP_AVG/100 - + bonus = MAX_USER_PRIO*PRIO_BONUS_RATIO*(p->best_sleep_avg/BEST_SLEEP_DECAY)/MAX_SLEEP_AVG/100 - MAX_USER_PRIO*PRIO_BONUS_RATIO/100/2;
prio = p->static_prio - bonus; @@ -371,6 +372,8 @@ static inline void activate_task(task_t sleep_avg = MAX_SLEEP_AVG; if (p->sleep_avg != sleep_avg) { p->sleep_avg = sleep_avg; + if ((sleep_avg * BEST_SLEEP_DECAY) > p->best_sleep_avg) + p->best_sleep_avg = sleep_avg * BEST_SLEEP_DECAY; p->prio = effective_prio(p); } } @@ -551,6 +554,7 @@ void wake_up_forked_process(task_t * p) */ current->sleep_avg = current->sleep_avg * PARENT_PENALTY / 100; p->sleep_avg = p->sleep_avg * CHILD_PENALTY / 100; + p->best_sleep_avg = p->sleep_avg * BEST_SLEEP_DECAY; p->prio = effective_prio(p); set_task_cpu(p, smp_processor_id()); @@ -1200,6 +1204,8 @@ void scheduler_tick(int user_ticks, int */ if (p->sleep_avg) p->sleep_avg--; + if (p->best_sleep_avg) + p->best_sleep_avg--; if (unlikely(rt_task(p))) { /* * RR tasks need a special form of timeslice management. diff -Naurp linux-2.5.72/include/linux/sched.h linux-2.5.72-test/include/linux/sched.h --- linux-2.5.72/include/linux/sched.h 2003-06-18 22:47:19.000000000 +1000 +++ linux-2.5.72-test/include/linux/sched.h 2003-06-19 20:56:18.000000000 +1000 @@ -332,6 +332,7 @@ struct task_struct { unsigned long sleep_avg; unsigned long last_run; + unsigned long best_sleep_avg; unsigned long policy; unsigned long cpus_allowed; | |