forked from TencentOS/TencentOS-kernel
106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
/*
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* Copyright (C) 2019 Tencent Ltd. All rights reserved.
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*
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* File Name ：fair.h
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* Author ：
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* Date ：2019-12-26
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* Descriptor：
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*/
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#ifndef _FAIR_H
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#define _FAIR_H
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extern unsigned int sched_nr_latency;
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extern const unsigned int sched_nr_migrate_break;
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extern unsigned long __read_mostly max_load_balance_interval;
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#define MIN_U(x, y) ((x) < (y) ? (x) :(y))
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enum fbq_type { regular, remote, all };
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#define LBF_ALL_PINNED 0x01
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#define LBF_NEED_BREAK 0x02
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#define LBF_DST_PINNED 0x04
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#define LBF_SOME_PINNED 0x08
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#define LBF_BT_LB 0x10
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struct lb_env {
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struct sched_domain *sd;
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struct rq *src_rq;
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int src_cpu;
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int dst_cpu;
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struct rq *dst_rq;
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struct cpumask *dst_grpmask;
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int new_dst_cpu;
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enum cpu_idle_type idle;
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long imbalance;
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/* The set of CPUs under consideration for load-balancing */
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struct cpumask *cpus;
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unsigned int flags;
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unsigned int loop;
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unsigned int loop_break;
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unsigned int loop_max;
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enum fbq_type fbq_type;
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struct list_head tasks;
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};
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unsigned long calc_delta_mine(unsigned long delta_exec,
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unsigned long weight, struct load_weight *lw);
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extern u64
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__calc_delta(u64 delta_exec, unsigned long weight, struct load_weight *lw);
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extern int idle_balance(struct rq *this_rq, struct rq_flags *rf);
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static inline u64 max_vruntime(u64 max_vruntime, u64 vruntime)
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{
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s64 delta = (s64)(vruntime - max_vruntime);
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if (delta > 0)
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max_vruntime = vruntime;
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return max_vruntime;
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}
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static inline u64 min_vruntime(u64 min_vruntime, u64 vruntime)
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{
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s64 delta = (s64)(vruntime - min_vruntime);
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if (delta < 0)
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min_vruntime = vruntime;
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return min_vruntime;
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}
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u64 __sched_period(unsigned long nr_running);
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void task_tick_numa(struct rq *rq, struct task_struct *curr);
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extern unsigned long weighted_cpuload(struct rq *rq);
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extern unsigned long source_load(int cpu, int type);
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extern unsigned long target_load(int cpu, int type);
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#ifdef CONFIG_NO_HZ_COMMON
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/*
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* idle load balancing details
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* - When one of the busy CPUs notice that there may be an idle rebalancing
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* needed, they will kick the idle load balancer, which then does idle
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* load balancing for all the idle CPUs.
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*/
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struct _nohz{
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cpumask_var_t idle_cpus_mask;
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atomic_t nr_cpus;
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unsigned long next_balance; /* in jiffy units */
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} ____cacheline_aligned;
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extern struct _nohz nohz;
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#endif
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void update_sysctl(void);
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#endif
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