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1da177e4 LT |
1 | /* |
2 | * include/linux/topology.h | |
3 | * | |
4 | * Written by: Matthew Dobson, IBM Corporation | |
5 | * | |
6 | * Copyright (C) 2002, IBM Corp. | |
7 | * | |
32525d02 | 8 | * All rights reserved. |
1da177e4 LT |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
18 | * NON INFRINGEMENT. See the GNU General Public License for more | |
19 | * details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * Send feedback to <colpatch@us.ibm.com> | |
26 | */ | |
27 | #ifndef _LINUX_TOPOLOGY_H | |
28 | #define _LINUX_TOPOLOGY_H | |
29 | ||
30 | #include <linux/cpumask.h> | |
31 | #include <linux/bitops.h> | |
32 | #include <linux/mmzone.h> | |
33 | #include <linux/smp.h> | |
72812019 | 34 | #include <linux/percpu.h> |
1da177e4 LT |
35 | #include <asm/topology.h> |
36 | ||
37 | #ifndef node_has_online_mem | |
38 | #define node_has_online_mem(nid) (1) | |
39 | #endif | |
40 | ||
41 | #ifndef nr_cpus_node | |
a70f7302 | 42 | #define nr_cpus_node(node) cpumask_weight(cpumask_of_node(node)) |
1da177e4 LT |
43 | #endif |
44 | ||
7c16ec58 MT |
45 | #define for_each_node_with_cpus(node) \ |
46 | for_each_online_node(node) \ | |
1da177e4 LT |
47 | if (nr_cpus_node(node)) |
48 | ||
ee79d1bd | 49 | int arch_update_cpu_topology(void); |
22e52b07 | 50 | |
1da177e4 LT |
51 | /* Conform to ACPI 2.0 SLIT distance definitions */ |
52 | #define LOCAL_DISTANCE 10 | |
53 | #define REMOTE_DISTANCE 20 | |
f787a503 | 54 | #ifndef node_distance |
1da177e4 LT |
55 | #define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) |
56 | #endif | |
9eeff239 CL |
57 | #ifndef RECLAIM_DISTANCE |
58 | /* | |
59 | * If the distance between nodes in a system is larger than RECLAIM_DISTANCE | |
60 | * (in whatever arch specific measurement units returned by node_distance()) | |
61 | * then switch on zone reclaim on boot. | |
62 | */ | |
32e45ff4 | 63 | #define RECLAIM_DISTANCE 30 |
9eeff239 | 64 | #endif |
1da177e4 LT |
65 | #ifndef PENALTY_FOR_NODE_WITH_CPUS |
66 | #define PENALTY_FOR_NODE_WITH_CPUS (1) | |
67 | #endif | |
68 | ||
69 | /* | |
70 | * Below are the 3 major initializers used in building sched_domains: | |
71 | * SD_SIBLING_INIT, for SMT domains | |
72 | * SD_CPU_INIT, for SMP domains | |
1da177e4 LT |
73 | * |
74 | * Any architecture that cares to do any tuning to these values should do so | |
75 | * by defining their own arch-specific initializer in include/asm/topology.h. | |
76 | * A definition there will automagically override these default initializers | |
77 | * and allow arch-specific performance tuning of sched_domains. | |
7c16ec58 | 78 | * (Only non-zero and non-null fields need be specified.) |
1da177e4 | 79 | */ |
7c16ec58 | 80 | |
1da177e4 LT |
81 | #ifdef CONFIG_SCHED_SMT |
82 | /* MCD - Do we really need this? It is always on if CONFIG_SCHED_SMT is, | |
83 | * so can't we drop this in favor of CONFIG_SCHED_SMT? | |
84 | */ | |
85 | #define ARCH_HAS_SCHED_WAKE_IDLE | |
86 | /* Common values for SMT siblings */ | |
87 | #ifndef SD_SIBLING_INIT | |
47734f89 IM |
88 | #define SD_SIBLING_INIT (struct sched_domain) { \ |
89 | .min_interval = 1, \ | |
90 | .max_interval = 2, \ | |
91 | .busy_factor = 64, \ | |
92 | .imbalance_pct = 110, \ | |
93 | \ | |
94 | .flags = 1*SD_LOAD_BALANCE \ | |
95 | | 1*SD_BALANCE_NEWIDLE \ | |
96 | | 1*SD_BALANCE_EXEC \ | |
97 | | 1*SD_BALANCE_FORK \ | |
182a85f8 | 98 | | 0*SD_BALANCE_WAKE \ |
47734f89 | 99 | | 1*SD_WAKE_AFFINE \ |
47734f89 | 100 | | 1*SD_SHARE_CPUPOWER \ |
50b926e4 | 101 | | 1*SD_SHARE_PKG_RESOURCES \ |
47734f89 | 102 | | 0*SD_SERIALIZE \ |
47734f89 | 103 | | 0*SD_PREFER_SIBLING \ |
2ec57d44 | 104 | | arch_sd_sibling_asym_packing() \ |
47734f89 IM |
105 | , \ |
106 | .last_balance = jiffies, \ | |
107 | .balance_interval = 1, \ | |
108 | .smt_gain = 1178, /* 15% */ \ | |
1da177e4 LT |
109 | } |
110 | #endif | |
111 | #endif /* CONFIG_SCHED_SMT */ | |
112 | ||
89c4710e SS |
113 | #ifdef CONFIG_SCHED_MC |
114 | /* Common values for MC siblings. for now mostly derived from SD_CPU_INIT */ | |
115 | #ifndef SD_MC_INIT | |
47734f89 IM |
116 | #define SD_MC_INIT (struct sched_domain) { \ |
117 | .min_interval = 1, \ | |
118 | .max_interval = 4, \ | |
119 | .busy_factor = 64, \ | |
120 | .imbalance_pct = 125, \ | |
121 | .cache_nice_tries = 1, \ | |
122 | .busy_idx = 2, \ | |
78e7ed53 | 123 | .wake_idx = 0, \ |
b8a543ea | 124 | .forkexec_idx = 0, \ |
47734f89 IM |
125 | \ |
126 | .flags = 1*SD_LOAD_BALANCE \ | |
840a0653 | 127 | | 1*SD_BALANCE_NEWIDLE \ |
47734f89 IM |
128 | | 1*SD_BALANCE_EXEC \ |
129 | | 1*SD_BALANCE_FORK \ | |
182a85f8 | 130 | | 0*SD_BALANCE_WAKE \ |
47734f89 | 131 | | 1*SD_WAKE_AFFINE \ |
47734f89 IM |
132 | | 0*SD_SHARE_CPUPOWER \ |
133 | | 1*SD_SHARE_PKG_RESOURCES \ | |
134 | | 0*SD_SERIALIZE \ | |
47734f89 IM |
135 | , \ |
136 | .last_balance = jiffies, \ | |
137 | .balance_interval = 1, \ | |
89c4710e SS |
138 | } |
139 | #endif | |
140 | #endif /* CONFIG_SCHED_MC */ | |
141 | ||
1da177e4 LT |
142 | /* Common values for CPUs */ |
143 | #ifndef SD_CPU_INIT | |
47734f89 IM |
144 | #define SD_CPU_INIT (struct sched_domain) { \ |
145 | .min_interval = 1, \ | |
146 | .max_interval = 4, \ | |
147 | .busy_factor = 64, \ | |
148 | .imbalance_pct = 125, \ | |
149 | .cache_nice_tries = 1, \ | |
150 | .busy_idx = 2, \ | |
151 | .idle_idx = 1, \ | |
0ec9fab3 | 152 | .newidle_idx = 0, \ |
78e7ed53 | 153 | .wake_idx = 0, \ |
b8a543ea | 154 | .forkexec_idx = 0, \ |
47734f89 IM |
155 | \ |
156 | .flags = 1*SD_LOAD_BALANCE \ | |
840a0653 | 157 | | 1*SD_BALANCE_NEWIDLE \ |
47734f89 IM |
158 | | 1*SD_BALANCE_EXEC \ |
159 | | 1*SD_BALANCE_FORK \ | |
182a85f8 | 160 | | 0*SD_BALANCE_WAKE \ |
6bd7821f | 161 | | 1*SD_WAKE_AFFINE \ |
47734f89 IM |
162 | | 0*SD_SHARE_CPUPOWER \ |
163 | | 0*SD_SHARE_PKG_RESOURCES \ | |
164 | | 0*SD_SERIALIZE \ | |
6956dc56 | 165 | | 1*SD_PREFER_SIBLING \ |
47734f89 IM |
166 | , \ |
167 | .last_balance = jiffies, \ | |
168 | .balance_interval = 1, \ | |
1da177e4 LT |
169 | } |
170 | #endif | |
171 | ||
01a08546 HC |
172 | #ifdef CONFIG_SCHED_BOOK |
173 | #ifndef SD_BOOK_INIT | |
174 | #error Please define an appropriate SD_BOOK_INIT in include/asm/topology.h!!! | |
175 | #endif | |
176 | #endif /* CONFIG_SCHED_BOOK */ | |
177 | ||
72812019 LS |
178 | #ifdef CONFIG_USE_PERCPU_NUMA_NODE_ID |
179 | DECLARE_PER_CPU(int, numa_node); | |
180 | ||
181 | #ifndef numa_node_id | |
182 | /* Returns the number of the current Node. */ | |
183 | static inline int numa_node_id(void) | |
184 | { | |
185 | return __this_cpu_read(numa_node); | |
186 | } | |
187 | #endif | |
188 | ||
189 | #ifndef cpu_to_node | |
190 | static inline int cpu_to_node(int cpu) | |
191 | { | |
192 | return per_cpu(numa_node, cpu); | |
193 | } | |
194 | #endif | |
195 | ||
196 | #ifndef set_numa_node | |
197 | static inline void set_numa_node(int node) | |
198 | { | |
c6ae41e7 | 199 | this_cpu_write(numa_node, node); |
72812019 LS |
200 | } |
201 | #endif | |
202 | ||
203 | #ifndef set_cpu_numa_node | |
204 | static inline void set_cpu_numa_node(int cpu, int node) | |
205 | { | |
206 | per_cpu(numa_node, cpu) = node; | |
207 | } | |
208 | #endif | |
209 | ||
210 | #else /* !CONFIG_USE_PERCPU_NUMA_NODE_ID */ | |
211 | ||
212 | /* Returns the number of the current Node. */ | |
213 | #ifndef numa_node_id | |
214 | static inline int numa_node_id(void) | |
215 | { | |
216 | return cpu_to_node(raw_smp_processor_id()); | |
217 | } | |
218 | #endif | |
219 | ||
220 | #endif /* [!]CONFIG_USE_PERCPU_NUMA_NODE_ID */ | |
221 | ||
7aac7898 LS |
222 | #ifdef CONFIG_HAVE_MEMORYLESS_NODES |
223 | ||
224 | /* | |
225 | * N.B., Do NOT reference the '_numa_mem_' per cpu variable directly. | |
226 | * It will not be defined when CONFIG_HAVE_MEMORYLESS_NODES is not defined. | |
227 | * Use the accessor functions set_numa_mem(), numa_mem_id() and cpu_to_mem(). | |
228 | */ | |
229 | DECLARE_PER_CPU(int, _numa_mem_); | |
230 | ||
231 | #ifndef set_numa_mem | |
232 | static inline void set_numa_mem(int node) | |
233 | { | |
c6ae41e7 | 234 | this_cpu_write(_numa_mem_, node); |
7aac7898 LS |
235 | } |
236 | #endif | |
237 | ||
238 | #ifndef numa_mem_id | |
239 | /* Returns the number of the nearest Node with memory */ | |
240 | static inline int numa_mem_id(void) | |
241 | { | |
242 | return __this_cpu_read(_numa_mem_); | |
243 | } | |
244 | #endif | |
245 | ||
246 | #ifndef cpu_to_mem | |
247 | static inline int cpu_to_mem(int cpu) | |
248 | { | |
249 | return per_cpu(_numa_mem_, cpu); | |
250 | } | |
251 | #endif | |
252 | ||
253 | #ifndef set_cpu_numa_mem | |
254 | static inline void set_cpu_numa_mem(int cpu, int node) | |
255 | { | |
256 | per_cpu(_numa_mem_, cpu) = node; | |
257 | } | |
258 | #endif | |
259 | ||
260 | #else /* !CONFIG_HAVE_MEMORYLESS_NODES */ | |
261 | ||
7aac7898 LS |
262 | #ifndef numa_mem_id |
263 | /* Returns the number of the nearest Node with memory */ | |
264 | static inline int numa_mem_id(void) | |
265 | { | |
266 | return numa_node_id(); | |
267 | } | |
268 | #endif | |
269 | ||
270 | #ifndef cpu_to_mem | |
271 | static inline int cpu_to_mem(int cpu) | |
272 | { | |
273 | return cpu_to_node(cpu); | |
274 | } | |
275 | #endif | |
276 | ||
277 | #endif /* [!]CONFIG_HAVE_MEMORYLESS_NODES */ | |
278 | ||
c50cbb05 BH |
279 | #ifndef topology_physical_package_id |
280 | #define topology_physical_package_id(cpu) ((void)(cpu), -1) | |
281 | #endif | |
282 | #ifndef topology_core_id | |
283 | #define topology_core_id(cpu) ((void)(cpu), 0) | |
284 | #endif | |
fbd59a8d RR |
285 | #ifndef topology_thread_cpumask |
286 | #define topology_thread_cpumask(cpu) cpumask_of(cpu) | |
287 | #endif | |
288 | #ifndef topology_core_cpumask | |
289 | #define topology_core_cpumask(cpu) cpumask_of(cpu) | |
290 | #endif | |
c50cbb05 | 291 | |
1da177e4 | 292 | #endif /* _LINUX_TOPOLOGY_H */ |