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hperf_hmp: scheduler initialization routines.

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setup, which initializes some HMP scheduler variables: big and little cluster
masks. They are read from kernel config(if set), else default values are used.

Signed-off-by: Tarek Dakhran <t.dakhran <at> samsung.com>
Signed-off-by: Sergey Dyasly <s.dyasly <at> samsung.com>
Signed-off-by: Dmitriy Safonov <d.safonov <at> partner.samsung.com>
Signed-off-by: Arseniy Krasnov <a.krasnov <at> samsung.com>
Signed-off-by: Ilya Maximets <i.maximets <at> samsung.com>
Signed-off-by: memeka <mihailescu2m@gmail.com>
This commit is contained in:
Arseniy Krasnov
2015-11-06 12:02:38 +00:00
committed by Mauro (mdrjr) Ribeiro
parent 29894de8f1
commit d97de18389
3 changed files with 65 additions and 0 deletions
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4
kernel/sched/core.c
View File

@@ -7716,6 +7716,10 @@ void __init sched_init(void)
#endif /* CONFIG_SMP */
init_rq_hrtick(rq);
atomic_set(&rq->nr_iowait, 0);
#ifdef CONFIG_HPERF_HMP
rq->druntime_sum = 0;
rq->nr_hmp_tasks = 0;
#endif
}
set_load_weight(&init_task);

46
kernel/sched/fair.c
View File

@@ -100,6 +100,11 @@ const_debug unsigned int sysctl_sched_migration_cost = 500000UL;
*/
unsigned int __read_mostly sysctl_sched_shares_window = 10000000UL;
#ifdef CONFIG_HPERF_HMP
extern void hmp_set_cpu_masks(struct cpumask *, struct cpumask *);
static unsigned int freq_scale_cpu_power[CONFIG_NR_CPUS];
#endif /* CONFIG_HPERF_HMP */
#ifdef CONFIG_CFS_BANDWIDTH
/*
* Amount of runtime to allocate from global (tg) to local (per-cfs_rq) pool
@@ -9094,8 +9099,38 @@ void show_numa_stats(struct task_struct *p, struct seq_file *m)
#endif /* CONFIG_NUMA_BALANCING */
#endif /* CONFIG_SCHED_DEBUG */
#ifdef CONFIG_HPERF_HMP
static unsigned long default_fast_mask = 0x0F;
static unsigned long default_slow_mask = 0xF0;
void hmp_set_cpu_masks(struct cpumask *fast_mask, struct cpumask *slow_mask)
{
cpumask_clear(fast_mask);
cpumask_clear(slow_mask);
/* try to parse CPU masks from config */
if (strlen(CONFIG_HMP_FAST_CPU_MASK) &&
strlen(CONFIG_HMP_SLOW_CPU_MASK)) {
if (cpumask_parse(CONFIG_HMP_FAST_CPU_MASK, fast_mask) ||
cpumask_parse(CONFIG_HMP_SLOW_CPU_MASK, slow_mask))
pr_err("hperf_hmp: Failed to get CPU masks from config!\n");
else
return;
}
pr_err("hperf_hmp: Fast mask will be: %08lX, slow mask: %08lX\n",
default_fast_mask, default_slow_mask);
fast_mask->bits[0] = default_fast_mask;
slow_mask->bits[0] = default_slow_mask;
}
#endif
__init void init_sched_fair_class(void)
{
#ifdef CONFIG_HPERF_HMP
int cpu;
#endif
#ifdef CONFIG_SMP
open_softirq(SCHED_SOFTIRQ, run_rebalance_domains);
@@ -9103,6 +9138,17 @@ __init void init_sched_fair_class(void)
nohz.next_balance = jiffies;
zalloc_cpumask_var(&nohz.idle_cpus_mask, GFP_NOWAIT);
#endif
#ifdef CONFIG_HPERF_HMP
for_each_possible_cpu(cpu)
freq_scale_cpu_power[cpu] = SCHED_CAPACITY_SCALE;
hmp_set_cpu_masks(cpu_fastest_mask, cpu_slowest_mask);
pr_info("hperf_hmp: fast CPUs mask: %08X\n",
(unsigned int)cpumask_bits(cpu_fastest_mask)[0]);
pr_info("hperf_hmp: slow CPUs mask: %08X\n",
(unsigned int)cpumask_bits(cpu_slowest_mask)[0]);
#endif
#endif /* SMP */
}

15
kernel/sched/sched.h
View File

@@ -633,6 +633,11 @@ struct rq {
*/
unsigned long nr_uninterruptible;
#ifdef CONFIG_HPERF_HMP
/* shows the amount of accumulated unfairness by tasks of this rq */
long druntime_sum;
unsigned int nr_hmp_tasks;
#endif
struct task_struct *curr, *idle, *stop;
unsigned long next_balance;
struct mm_struct *prev_mm;
@@ -953,6 +958,16 @@ static inline void unregister_sched_domain_sysctl(void)
}
#endif
#ifdef CONFIG_HPERF_HMP
extern struct cpumask *cpu_fastest_mask;
extern struct cpumask *cpu_slowest_mask;
static inline bool cpu_is_fastest(int cpu)
{
return cpumask_test_cpu(cpu, cpu_fastest_mask);
}
#endif
#else
static inline void sched_ttwu_pending(void) { }