1
2#ifndef _LINUX_SCHED_TOPOLOGY_H
3#define _LINUX_SCHED_TOPOLOGY_H
4
5#include <linux/topology.h>
6
7#include <linux/sched/idle.h>
8
9
10
11
12#ifdef CONFIG_SMP
13
14
15#define SD_FLAG(name, mflags) __##name,
16enum {
17 #include <linux/sched/sd_flags.h>
18 __SD_FLAG_CNT,
19};
20#undef SD_FLAG
21
22#define SD_FLAG(name, mflags) name = 1 << __##name,
23enum {
24 #include <linux/sched/sd_flags.h>
25};
26#undef SD_FLAG
27
28#ifdef CONFIG_SCHED_DEBUG
29
30struct sd_flag_debug {
31 unsigned int meta_flags;
32 char *name;
33};
34extern const struct sd_flag_debug sd_flag_debug[];
35
36#endif
37
38#ifdef CONFIG_SCHED_SMT
39static inline int cpu_smt_flags(void)
40{
41 return SD_SHARE_CPUCAPACITY | SD_SHARE_PKG_RESOURCES;
42}
43#endif
44
45#ifdef CONFIG_SCHED_MC
46static inline int cpu_core_flags(void)
47{
48 return SD_SHARE_PKG_RESOURCES;
49}
50#endif
51
52#ifdef CONFIG_NUMA
53static inline int cpu_numa_flags(void)
54{
55 return SD_NUMA;
56}
57#endif
58
59extern int arch_asym_cpu_priority(int cpu);
60
61struct sched_domain_attr {
62 int relax_domain_level;
63};
64
65#define SD_ATTR_INIT (struct sched_domain_attr) { \
66 .relax_domain_level = -1, \
67}
68
69extern int sched_domain_level_max;
70
71struct sched_group;
72
73struct sched_domain_shared {
74 atomic_t ref;
75 atomic_t nr_busy_cpus;
76 int has_idle_cores;
77};
78
79struct sched_domain {
80
81 struct sched_domain __rcu *parent;
82 struct sched_domain __rcu *child;
83 struct sched_group *groups;
84 unsigned long min_interval;
85 unsigned long max_interval;
86 unsigned int busy_factor;
87 unsigned int imbalance_pct;
88 unsigned int cache_nice_tries;
89
90 int nohz_idle;
91 int flags;
92 int level;
93
94
95 unsigned long last_balance;
96 unsigned int balance_interval;
97 unsigned int nr_balance_failed;
98
99
100 u64 max_newidle_lb_cost;
101 unsigned long next_decay_max_lb_cost;
102
103 u64 avg_scan_cost;
104
105#ifdef CONFIG_SCHEDSTATS
106
107 unsigned int lb_count[CPU_MAX_IDLE_TYPES];
108 unsigned int lb_failed[CPU_MAX_IDLE_TYPES];
109 unsigned int lb_balanced[CPU_MAX_IDLE_TYPES];
110 unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES];
111 unsigned int lb_gained[CPU_MAX_IDLE_TYPES];
112 unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES];
113 unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES];
114 unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES];
115
116
117 unsigned int alb_count;
118 unsigned int alb_failed;
119 unsigned int alb_pushed;
120
121
122 unsigned int sbe_count;
123 unsigned int sbe_balanced;
124 unsigned int sbe_pushed;
125
126
127 unsigned int sbf_count;
128 unsigned int sbf_balanced;
129 unsigned int sbf_pushed;
130
131
132 unsigned int ttwu_wake_remote;
133 unsigned int ttwu_move_affine;
134 unsigned int ttwu_move_balance;
135#endif
136#ifdef CONFIG_SCHED_DEBUG
137 char *name;
138#endif
139 union {
140 void *private;
141 struct rcu_head rcu;
142 };
143 struct sched_domain_shared *shared;
144
145 unsigned int span_weight;
146
147
148
149
150
151
152
153 unsigned long span[];
154};
155
156static inline struct cpumask *sched_domain_span(struct sched_domain *sd)
157{
158 return to_cpumask(sd->span);
159}
160
161extern void partition_sched_domains_locked(int ndoms_new,
162 cpumask_var_t doms_new[],
163 struct sched_domain_attr *dattr_new);
164
165extern void partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
166 struct sched_domain_attr *dattr_new);
167
168
169cpumask_var_t *alloc_sched_domains(unsigned int ndoms);
170void free_sched_domains(cpumask_var_t doms[], unsigned int ndoms);
171
172bool cpus_share_cache(int this_cpu, int that_cpu);
173
174typedef const struct cpumask *(*sched_domain_mask_f)(int cpu);
175typedef int (*sched_domain_flags_f)(void);
176
177#define SDTL_OVERLAP 0x01
178
179struct sd_data {
180 struct sched_domain *__percpu *sd;
181 struct sched_domain_shared *__percpu *sds;
182 struct sched_group *__percpu *sg;
183 struct sched_group_capacity *__percpu *sgc;
184};
185
186struct sched_domain_topology_level {
187 sched_domain_mask_f mask;
188 sched_domain_flags_f sd_flags;
189 int flags;
190 int numa_level;
191 struct sd_data data;
192#ifdef CONFIG_SCHED_DEBUG
193 char *name;
194#endif
195};
196
197extern void set_sched_topology(struct sched_domain_topology_level *tl);
198
199#ifdef CONFIG_SCHED_DEBUG
200# define SD_INIT_NAME(type) .name = #type
201#else
202# define SD_INIT_NAME(type)
203#endif
204
205#else
206
207struct sched_domain_attr;
208
209static inline void
210partition_sched_domains_locked(int ndoms_new, cpumask_var_t doms_new[],
211 struct sched_domain_attr *dattr_new)
212{
213}
214
215static inline void
216partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
217 struct sched_domain_attr *dattr_new)
218{
219}
220
221static inline bool cpus_share_cache(int this_cpu, int that_cpu)
222{
223 return true;
224}
225
226#endif
227
228#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
229extern void rebuild_sched_domains_energy(void);
230#else
231static inline void rebuild_sched_domains_energy(void)
232{
233}
234#endif
235
236#ifndef arch_scale_cpu_capacity
237
238
239
240
241
242
243
244
245
246
247static __always_inline
248unsigned long arch_scale_cpu_capacity(int cpu)
249{
250 return SCHED_CAPACITY_SCALE;
251}
252#endif
253
254#ifndef arch_scale_thermal_pressure
255static __always_inline
256unsigned long arch_scale_thermal_pressure(int cpu)
257{
258 return 0;
259}
260#endif
261
262#ifndef arch_set_thermal_pressure
263static __always_inline
264void arch_set_thermal_pressure(const struct cpumask *cpus,
265 unsigned long th_pressure)
266{ }
267#endif
268
269static inline int task_node(const struct task_struct *p)
270{
271 return cpu_to_node(task_cpu(p));
272}
273
274#endif
275