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Commit aa07bbe6 authored by Abhijeet Dharmapurikar's avatar Abhijeet Dharmapurikar
Browse files

sched: Improve the scheduler 



This change is for general scheduler improvement.

Change-Id: I18364c6061ed7525755aaf187bf15a8cb9b54a8a
Signed-off-by: default avatarAbhijeet Dharmapurikar <adharmap@codeaurora.org>
parent 66e38d99

include/linux/sched.h

+1 −0
Original line number Diff line number Diff line
@@ -801,6 +801,7 @@ struct task_struct { 
	struct list_head grp_list;

	u64 cpu_cycles;

	bool misfit;

	u8 unfilter;

#endif



#ifdef CONFIG_CGROUP_SCHED

include/linux/sched/sysctl.h

+2 −0
Original line number Diff line number Diff line
@@ -42,6 +42,8 @@ extern unsigned int sysctl_sched_min_task_util_for_boost; 
extern unsigned int sysctl_sched_min_task_util_for_colocation;

extern unsigned int sysctl_sched_asym_cap_sibling_freq_match_pct;

extern unsigned int sysctl_sched_coloc_downmigrate_ns;

extern unsigned int sysctl_sched_task_unfilter_nr_windows;



extern int

walt_proc_group_thresholds_handler(struct ctl_table *table, int write,

			 void __user *buffer, size_t *lenp,

include/trace/events/sched.h

+5 −2
Original line number Diff line number Diff line
@@ -1234,6 +1234,7 @@ TRACE_EVENT(sched_task_util, 
		__field(bool,		is_rtg)

		__field(bool,		rtg_skip_min)

		__field(int,		start_cpu)

		__field(int,		unfilter)

	),



	TP_fast_assign(
@@ -1252,14 +1253,16 @@ TRACE_EVENT(sched_task_util, 
		__entry->is_rtg                 = is_rtg;

		__entry->rtg_skip_min		= rtg_skip_min;

		__entry->start_cpu		= start_cpu;

		__entry->unfilter		= p->unfilter;

	),



	TP_printk("pid=%d comm=%s util=%lu prev_cpu=%d candidates=%#lx best_energy_cpu=%d sync=%d need_idle=%d fastpath=%d placement_boost=%d latency=%llu stune_boosted=%d is_rtg=%d rtg_skip_min=%d start_cpu=%d",

	TP_printk("pid=%d comm=%s util=%lu prev_cpu=%d candidates=%#lx best_energy_cpu=%d sync=%d need_idle=%d fastpath=%d placement_boost=%d latency=%llu stune_boosted=%d is_rtg=%d rtg_skip_min=%d start_cpu=%d unfilter=%d",

		__entry->pid, __entry->comm, __entry->util, __entry->prev_cpu,

		__entry->candidates, __entry->best_energy_cpu, __entry->sync,

		__entry->need_idle, __entry->fastpath, __entry->placement_boost,

		__entry->latency, __entry->stune_boosted,

		__entry->is_rtg, __entry->rtg_skip_min, __entry->start_cpu)

		__entry->is_rtg, __entry->rtg_skip_min, __entry->start_cpu,

		__entry->unfilter)

)



/*

kernel/sched/fair.c

+2 −2
Original line number Diff line number Diff line
@@ -6733,8 +6733,8 @@ static int get_start_cpu(struct task_struct *p) 
	int start_cpu = rd->min_cap_orig_cpu;

	bool boosted = schedtune_task_boost(p) > 0 ||

			task_boost_policy(p) == SCHED_BOOST_ON_BIG;

	bool task_skip_min = get_rtg_status(p) &&

		(task_util(p) > sched_task_filter_util);

	bool task_skip_min = (sched_boost() != CONSERVATIVE_BOOST)

				&& get_rtg_status(p) && p->unfilter;



	/*

	 * note about min/mid/max_cap_orig_cpu - either all of them will be -ve

kernel/sched/walt.c

+9 −0
Original line number Diff line number Diff line
@@ -1727,6 +1727,8 @@ account_busy_for_task_demand(struct rq *rq, struct task_struct *p, int event) 
	return 1;

}



unsigned int sysctl_sched_task_unfilter_nr_windows = 10;



/*

 * Called when new window is starting for a task, to record cpu usage over

 * recently concluded window(s). Normally 'samples' should be 1. It can be > 1
@@ -1807,6 +1809,12 @@ static void update_history(struct rq *rq, struct task_struct *p, 
	p->ravg.pred_demand = pred_demand;

	p->ravg.pred_demand_scaled = pred_demand_scaled;



	if (demand_scaled > sched_task_filter_util)

		p->unfilter = sysctl_sched_task_unfilter_nr_windows;

	else

		if (p->unfilter)

			p->unfilter = p->unfilter - 1;



done:

	trace_sched_update_history(rq, p, runtime, samples, event);

}
@@ -2087,6 +2095,7 @@ void init_new_task_load(struct task_struct *p) 
	for (i = 0; i < RAVG_HIST_SIZE_MAX; ++i)

		p->ravg.sum_history[i] = init_load_windows;

	p->misfit = false;

	p->unfilter = sysctl_sched_task_unfilter_nr_windows;

}



/*