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Commit 44843c43 authored by Sai Harshini Nimmala's avatar Sai Harshini Nimmala
Browse files

sched/walt: Improve the scheduler 



This change is for general scheduler improvement.

Change-Id: I33e9ec890f8b54d673770d5d02dba489a8e08ce7
Signed-off-by: default avatarSai Harshini Nimmala <snimmala@codeaurora.org>
parent b9173741

include/linux/sched.h

+1 −1
Original line number Diff line number Diff line
@@ -825,7 +825,7 @@ struct task_struct { 
	struct list_head grp_list;

	u64 cpu_cycles;

	bool misfit;

	u8 unfilter;

	u32 unfilter;

#endif



#ifdef CONFIG_CGROUP_SCHED

include/linux/sched/sysctl.h

+1 −1
Original line number Diff line number Diff line
@@ -46,7 +46,7 @@ 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 unsigned int sysctl_sched_task_unfilter_period;

extern unsigned int sysctl_sched_busy_hyst_enable_cpus;

extern unsigned int sysctl_sched_busy_hyst;

extern unsigned int sysctl_sched_coloc_busy_hyst_enable_cpus;

include/trace/events/sched.h

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

		__field(bool,		rtg_skip_min)

		__field(int,		start_cpu)

		__field(int,		unfilter)

		__field(u32,		unfilter)

	),



	TP_fast_assign(
@@ -1260,7 +1260,7 @@ TRACE_EVENT(sched_task_util, 
#endif

	),



	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",

	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=%u",

		__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,

kernel/sched/walt.c

+5 −5
Original line number Diff line number Diff line
@@ -1791,7 +1791,7 @@ 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;

unsigned int sysctl_sched_task_unfilter_period = 200000000;



/*

 * Called when new window is starting for a task, to record cpu usage over
@@ -1874,11 +1874,11 @@ static void update_history(struct rq *rq, struct task_struct *p, 
	p->ravg.pred_demand_scaled = pred_demand_scaled;



	if (demand_scaled > sched_task_filter_util)

		p->unfilter = sysctl_sched_task_unfilter_nr_windows;

		p->unfilter = sysctl_sched_task_unfilter_period;

	else

		if (p->unfilter)

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



			p->unfilter = max_t(int, 0,

				p->unfilter - p->ravg.last_win_size);

done:

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

}
@@ -2160,7 +2160,7 @@ 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;

	p->unfilter = sysctl_sched_task_unfilter_period;

}



/*

kernel/sysctl.c

+4 −3
Original line number Diff line number Diff line
@@ -141,6 +141,7 @@ static int ten_thousand = 10000; 
static int six_hundred_forty_kb = 640 * 1024;

#endif

static int two_hundred_fifty_five = 255;

static int __maybe_unused two_hundred_million = 200000000;



#ifdef CONFIG_SCHED_WALT

const int sched_user_hint_max = 1000;
@@ -458,13 +459,13 @@ static struct ctl_table kern_table[] = { 
		.proc_handler	= proc_douintvec_minmax,

	},

	{

		.procname	= "sched_task_unfilter_nr_windows",

		.data		= &sysctl_sched_task_unfilter_nr_windows,

		.procname	= "sched_task_unfilter_period",

		.data		= &sysctl_sched_task_unfilter_period,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler   = proc_dointvec_minmax,

		.extra1         = &one,

		.extra2		= &two_hundred_fifty_five,

		.extra2		= &two_hundred_million,

	},

	{

		.procname	= "sched_busy_hysteresis_enable_cpus",