diff options
| -rw-r--r-- | include/linux/sched.h | 1 | ||||
| -rw-r--r-- | kernel/sched.c | 18 | ||||
| -rw-r--r-- | kernel/sched_debug.c | 2 | ||||
| -rw-r--r-- | kernel/sched_fair.c | 97 | ||||
| -rw-r--r-- | kernel/sysctl.c | 11 |
5 files changed, 5 insertions, 124 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 5e5c457fba8..353630d6ae4 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -905,7 +905,6 @@ struct sched_entity { u64 vruntime; u64 prev_sum_exec_runtime; u64 wait_start_fair; - u64 sleep_start_fair; #ifdef CONFIG_SCHEDSTATS u64 wait_start; diff --git a/kernel/sched.c b/kernel/sched.c index 3a4ac0b75f2..21cc3b2be02 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -180,7 +180,6 @@ struct cfs_rq { u64 exec_clock; u64 min_vruntime; s64 wait_runtime; - u64 sleeper_bonus; unsigned long wait_runtime_overruns, wait_runtime_underruns; struct rb_root tasks_timeline; @@ -673,19 +672,6 @@ static inline void resched_task(struct task_struct *p) } #endif -static u64 div64_likely32(u64 divident, unsigned long divisor) -{ -#if BITS_PER_LONG == 32 - if (likely(divident <= 0xffffffffULL)) - return (u32)divident / divisor; - do_div(divident, divisor); - - return divident; -#else - return divident / divisor; -#endif -} - #if BITS_PER_LONG == 32 # define WMULT_CONST (~0UL) #else @@ -1016,8 +1002,6 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu) if (p->se.wait_start_fair) p->se.wait_start_fair -= fair_clock_offset; - if (p->se.sleep_start_fair) - p->se.sleep_start_fair -= fair_clock_offset; #ifdef CONFIG_SCHEDSTATS if (p->se.wait_start) @@ -1592,7 +1576,6 @@ static void __sched_fork(struct task_struct *p) p->se.sum_exec_runtime = 0; p->se.prev_sum_exec_runtime = 0; p->se.wait_runtime = 0; - p->se.sleep_start_fair = 0; #ifdef CONFIG_SCHEDSTATS p->se.wait_start = 0; @@ -6582,7 +6565,6 @@ void normalize_rt_tasks(void) p->se.wait_runtime = 0; p->se.exec_start = 0; p->se.wait_start_fair = 0; - p->se.sleep_start_fair = 0; #ifdef CONFIG_SCHEDSTATS p->se.wait_start = 0; p->se.sleep_start = 0; diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c index 62965f0ae37..3350169a7d2 100644 --- a/kernel/sched_debug.c +++ b/kernel/sched_debug.c @@ -148,7 +148,6 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) P(wait_runtime); P(wait_runtime_overruns); P(wait_runtime_underruns); - P(sleeper_bonus); #undef P print_cfs_rq_runtime_sum(m, cpu, cfs_rq); @@ -272,7 +271,6 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m) P(se.wait_runtime); P(se.wait_start_fair); P(se.exec_start); - P(se.sleep_start_fair); P(se.vruntime); P(se.sum_exec_runtime); diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 72f202a8be9..a94189c42d1 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -249,41 +249,11 @@ static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se) return period; } -static inline void -limit_wait_runtime(struct cfs_rq *cfs_rq, struct sched_entity *se) -{ - long limit = sysctl_sched_runtime_limit; - - /* - * Niced tasks have the same history dynamic range as - * non-niced tasks: - */ - if (unlikely(se->wait_runtime > limit)) { - se->wait_runtime = limit; - schedstat_inc(se, wait_runtime_overruns); - schedstat_inc(cfs_rq, wait_runtime_overruns); - } - if (unlikely(se->wait_runtime < -limit)) { - se->wait_runtime = -limit; - schedstat_inc(se, wait_runtime_underruns); - schedstat_inc(cfs_rq, wait_runtime_underruns); - } -} - -static inline void -__add_wait_runtime(struct cfs_rq *cfs_rq, struct sched_entity *se, long delta) -{ - se->wait_runtime += delta; - schedstat_add(se, sum_wait_runtime, delta); - limit_wait_runtime(cfs_rq, se); -} - static void add_wait_runtime(struct cfs_rq *cfs_rq, struct sched_entity *se, long delta) { - schedstat_add(cfs_rq, wait_runtime, -se->wait_runtime); - __add_wait_runtime(cfs_rq, se, delta); - schedstat_add(cfs_rq, wait_runtime, se->wait_runtime); + se->wait_runtime += delta; + schedstat_add(cfs_rq, wait_runtime, delta); } /* @@ -294,7 +264,7 @@ static inline void __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr, unsigned long delta_exec) { - unsigned long delta, delta_fair, delta_mine, delta_exec_weighted; + unsigned long delta_fair, delta_mine, delta_exec_weighted; struct load_weight *lw = &cfs_rq->load; unsigned long load = lw->weight; @@ -318,14 +288,6 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr, delta_fair = calc_delta_fair(delta_exec, lw); delta_mine = calc_delta_mine(delta_exec, curr->load.weight, lw); - if (cfs_rq->sleeper_bonus > sysctl_sched_min_granularity) { - delta = min((u64)delta_mine, cfs_rq->sleeper_bonus); - delta = min(delta, (unsigned long)( - (long)sysctl_sched_runtime_limit - curr->wait_runtime)); - cfs_rq->sleeper_bonus -= delta; - delta_mine -= delta; - } - cfs_rq->fair_clock += delta_fair; /* * We executed delta_exec amount of time on the CPU, @@ -461,58 +423,8 @@ update_stats_curr_end(struct cfs_rq *cfs_rq, struct sched_entity *se) * Scheduling class queueing methods: */ -static void __enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se, - unsigned long delta_fair) -{ - unsigned long load = cfs_rq->load.weight; - long prev_runtime; - - /* - * Do not boost sleepers if there's too much bonus 'in flight' - * already: - */ - if (unlikely(cfs_rq->sleeper_bonus > sysctl_sched_runtime_limit)) - return; - - if (sched_feat(SLEEPER_LOAD_AVG)) - load = rq_of(cfs_rq)->cpu_load[2]; - - /* - * Fix up delta_fair with the effect of us running - * during the whole sleep period: - */ - if (sched_feat(SLEEPER_AVG)) - delta_fair = div64_likely32((u64)delta_fair * load, - load + se->load.weight); - - delta_fair = calc_weighted(delta_fair, se); - - prev_runtime = se->wait_runtime; - __add_wait_runtime(cfs_rq, se, delta_fair); - delta_fair = se->wait_runtime - prev_runtime; - - /* - * Track the amount of bonus we've given to sleepers: - */ - cfs_rq->sleeper_bonus += delta_fair; -} - static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se) { - struct task_struct *tsk = task_of(se); - unsigned long delta_fair; - - if ((entity_is_task(se) && tsk->policy == SCHED_BATCH) || - !sched_feat(FAIR_SLEEPERS)) - return; - - delta_fair = (unsigned long)min((u64)(2*sysctl_sched_runtime_limit), - (u64)(cfs_rq->fair_clock - se->sleep_start_fair)); - - __enqueue_sleeper(cfs_rq, se, delta_fair); - - se->sleep_start_fair = 0; - #ifdef CONFIG_SCHEDSTATS if (se->sleep_start) { u64 delta = rq_of(cfs_rq)->clock - se->sleep_start; @@ -544,6 +456,8 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se) * time that the task spent sleeping: */ if (unlikely(prof_on == SLEEP_PROFILING)) { + struct task_struct *tsk = task_of(se); + profile_hits(SLEEP_PROFILING, (void *)get_wchan(tsk), delta >> 20); } @@ -604,7 +518,6 @@ dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int sleep) { update_stats_dequeue(cfs_rq, se); if (sleep) { - se->sleep_start_fair = cfs_rq->fair_clock; #ifdef CONFIG_SCHEDSTATS if (entity_is_task(se)) { struct task_struct *tsk = task_of(se); diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 9b1b0d4ff96..97b15c27407 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -266,17 +266,6 @@ static ctl_table kern_table[] = { }, { .ctl_name = CTL_UNNUMBERED, - .procname = "sched_runtime_limit_ns", - .data = &sysctl_sched_runtime_limit, - .maxlen = sizeof(unsigned int), - .mode = 0644, - .proc_handler = &proc_dointvec_minmax, - .strategy = &sysctl_intvec, - .extra1 = &min_sched_granularity_ns, - .extra2 = &max_sched_granularity_ns, - }, - { - .ctl_name = CTL_UNNUMBERED, .procname = "sched_child_runs_first", .data = &sysctl_sched_child_runs_first, .maxlen = sizeof(unsigned int), |