This source file includes following definitions.
- cpu_smt_flags
- cpu_core_flags
- cpu_numa_flags
- sched_domain_span
- partition_sched_domains_locked
- partition_sched_domains
- cpus_share_cache
- arch_scale_cpu_capacity
- task_node
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 #define SD_LOAD_BALANCE 0x0001
15 #define SD_BALANCE_NEWIDLE 0x0002
16 #define SD_BALANCE_EXEC 0x0004
17 #define SD_BALANCE_FORK 0x0008
18 #define SD_BALANCE_WAKE 0x0010
19 #define SD_WAKE_AFFINE 0x0020
20 #define SD_ASYM_CPUCAPACITY 0x0040
21 #define SD_SHARE_CPUCAPACITY 0x0080
22 #define SD_SHARE_POWERDOMAIN 0x0100
23 #define SD_SHARE_PKG_RESOURCES 0x0200
24 #define SD_SERIALIZE 0x0400
25 #define SD_ASYM_PACKING 0x0800
26 #define SD_PREFER_SIBLING 0x1000
27 #define SD_OVERLAP 0x2000
28 #define SD_NUMA 0x4000
29
30 #ifdef CONFIG_SCHED_SMT
31 static inline int cpu_smt_flags(void)
32 {
33 return SD_SHARE_CPUCAPACITY | SD_SHARE_PKG_RESOURCES;
34 }
35 #endif
36
37 #ifdef CONFIG_SCHED_MC
38 static inline int cpu_core_flags(void)
39 {
40 return SD_SHARE_PKG_RESOURCES;
41 }
42 #endif
43
44 #ifdef CONFIG_NUMA
45 static inline int cpu_numa_flags(void)
46 {
47 return SD_NUMA;
48 }
49 #endif
50
51 extern int arch_asym_cpu_priority(int cpu);
52
53 struct sched_domain_attr {
54 int relax_domain_level;
55 };
56
57 #define SD_ATTR_INIT (struct sched_domain_attr) { \
58 .relax_domain_level = -1, \
59 }
60
61 extern int sched_domain_level_max;
62
63 struct sched_group;
64
65 struct sched_domain_shared {
66 atomic_t ref;
67 atomic_t nr_busy_cpus;
68 int has_idle_cores;
69 };
70
71 struct sched_domain {
72
73 struct sched_domain __rcu *parent;
74 struct sched_domain __rcu *child;
75 struct sched_group *groups;
76 unsigned long min_interval;
77 unsigned long max_interval;
78 unsigned int busy_factor;
79 unsigned int imbalance_pct;
80 unsigned int cache_nice_tries;
81
82 int nohz_idle;
83 int flags;
84 int level;
85
86
87 unsigned long last_balance;
88 unsigned int balance_interval;
89 unsigned int nr_balance_failed;
90
91
92 u64 max_newidle_lb_cost;
93 unsigned long next_decay_max_lb_cost;
94
95 u64 avg_scan_cost;
96
97 #ifdef CONFIG_SCHEDSTATS
98
99 unsigned int lb_count[CPU_MAX_IDLE_TYPES];
100 unsigned int lb_failed[CPU_MAX_IDLE_TYPES];
101 unsigned int lb_balanced[CPU_MAX_IDLE_TYPES];
102 unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES];
103 unsigned int lb_gained[CPU_MAX_IDLE_TYPES];
104 unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES];
105 unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES];
106 unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES];
107
108
109 unsigned int alb_count;
110 unsigned int alb_failed;
111 unsigned int alb_pushed;
112
113
114 unsigned int sbe_count;
115 unsigned int sbe_balanced;
116 unsigned int sbe_pushed;
117
118
119 unsigned int sbf_count;
120 unsigned int sbf_balanced;
121 unsigned int sbf_pushed;
122
123
124 unsigned int ttwu_wake_remote;
125 unsigned int ttwu_move_affine;
126 unsigned int ttwu_move_balance;
127 #endif
128 #ifdef CONFIG_SCHED_DEBUG
129 char *name;
130 #endif
131 union {
132 void *private;
133 struct rcu_head rcu;
134 };
135 struct sched_domain_shared *shared;
136
137 unsigned int span_weight;
138
139
140
141
142
143
144
145 unsigned long span[0];
146 };
147
148 static inline struct cpumask *sched_domain_span(struct sched_domain *sd)
149 {
150 return to_cpumask(sd->span);
151 }
152
153 extern void partition_sched_domains_locked(int ndoms_new,
154 cpumask_var_t doms_new[],
155 struct sched_domain_attr *dattr_new);
156
157 extern void partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
158 struct sched_domain_attr *dattr_new);
159
160
161 cpumask_var_t *alloc_sched_domains(unsigned int ndoms);
162 void free_sched_domains(cpumask_var_t doms[], unsigned int ndoms);
163
164 bool cpus_share_cache(int this_cpu, int that_cpu);
165
166 typedef const struct cpumask *(*sched_domain_mask_f)(int cpu);
167 typedef int (*sched_domain_flags_f)(void);
168
169 #define SDTL_OVERLAP 0x01
170
171 struct sd_data {
172 struct sched_domain *__percpu *sd;
173 struct sched_domain_shared *__percpu *sds;
174 struct sched_group *__percpu *sg;
175 struct sched_group_capacity *__percpu *sgc;
176 };
177
178 struct sched_domain_topology_level {
179 sched_domain_mask_f mask;
180 sched_domain_flags_f sd_flags;
181 int flags;
182 int numa_level;
183 struct sd_data data;
184 #ifdef CONFIG_SCHED_DEBUG
185 char *name;
186 #endif
187 };
188
189 extern void set_sched_topology(struct sched_domain_topology_level *tl);
190
191 #ifdef CONFIG_SCHED_DEBUG
192 # define SD_INIT_NAME(type) .name = #type
193 #else
194 # define SD_INIT_NAME(type)
195 #endif
196
197 #else
198
199 struct sched_domain_attr;
200
201 static inline void
202 partition_sched_domains_locked(int ndoms_new, cpumask_var_t doms_new[],
203 struct sched_domain_attr *dattr_new)
204 {
205 }
206
207 static inline void
208 partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
209 struct sched_domain_attr *dattr_new)
210 {
211 }
212
213 static inline bool cpus_share_cache(int this_cpu, int that_cpu)
214 {
215 return true;
216 }
217
218 #endif
219
220 #ifndef arch_scale_cpu_capacity
221 static __always_inline
222 unsigned long arch_scale_cpu_capacity(int cpu)
223 {
224 return SCHED_CAPACITY_SCALE;
225 }
226 #endif
227
228 static inline int task_node(const struct task_struct *p)
229 {
230 return cpu_to_node(task_cpu(p));
231 }
232
233 #endif