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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 | |
73 | * SD_NODE_INIT, for NUMA domains | |
74 | * | |
75 | * Any architecture that cares to do any tuning to these values should do so | |
76 | * by defining their own arch-specific initializer in include/asm/topology.h. | |
77 | * A definition there will automagically override these default initializers | |
78 | * and allow arch-specific performance tuning of sched_domains. | |
7c16ec58 | 79 | * (Only non-zero and non-null fields need be specified.) |
1da177e4 | 80 | */ |
7c16ec58 | 81 | |
1da177e4 LT |
82 | #ifdef CONFIG_SCHED_SMT |
83 | /* MCD - Do we really need this? It is always on if CONFIG_SCHED_SMT is, | |
84 | * so can't we drop this in favor of CONFIG_SCHED_SMT? | |
85 | */ | |
86 | #define ARCH_HAS_SCHED_WAKE_IDLE | |
87 | /* Common values for SMT siblings */ | |
88 | #ifndef SD_SIBLING_INIT | |
47734f89 IM |
89 | #define SD_SIBLING_INIT (struct sched_domain) { \ |
90 | .min_interval = 1, \ | |
91 | .max_interval = 2, \ | |
92 | .busy_factor = 64, \ | |
93 | .imbalance_pct = 110, \ | |
94 | \ | |
95 | .flags = 1*SD_LOAD_BALANCE \ | |
96 | | 1*SD_BALANCE_NEWIDLE \ | |
97 | | 1*SD_BALANCE_EXEC \ | |
98 | | 1*SD_BALANCE_FORK \ | |
182a85f8 | 99 | | 0*SD_BALANCE_WAKE \ |
47734f89 | 100 | | 1*SD_WAKE_AFFINE \ |
47734f89 IM |
101 | | 1*SD_SHARE_CPUPOWER \ |
102 | | 0*SD_POWERSAVINGS_BALANCE \ | |
50b926e4 | 103 | | 1*SD_SHARE_PKG_RESOURCES \ |
47734f89 | 104 | | 0*SD_SERIALIZE \ |
47734f89 | 105 | | 0*SD_PREFER_SIBLING \ |
2ec57d44 | 106 | | arch_sd_sibling_asym_packing() \ |
47734f89 IM |
107 | , \ |
108 | .last_balance = jiffies, \ | |
109 | .balance_interval = 1, \ | |
110 | .smt_gain = 1178, /* 15% */ \ | |
1da177e4 LT |
111 | } |
112 | #endif | |
113 | #endif /* CONFIG_SCHED_SMT */ | |
114 | ||
89c4710e SS |
115 | #ifdef CONFIG_SCHED_MC |
116 | /* Common values for MC siblings. for now mostly derived from SD_CPU_INIT */ | |
117 | #ifndef SD_MC_INIT | |
47734f89 IM |
118 | #define SD_MC_INIT (struct sched_domain) { \ |
119 | .min_interval = 1, \ | |
120 | .max_interval = 4, \ | |
121 | .busy_factor = 64, \ | |
122 | .imbalance_pct = 125, \ | |
123 | .cache_nice_tries = 1, \ | |
124 | .busy_idx = 2, \ | |
78e7ed53 | 125 | .wake_idx = 0, \ |
b8a543ea | 126 | .forkexec_idx = 0, \ |
47734f89 IM |
127 | \ |
128 | .flags = 1*SD_LOAD_BALANCE \ | |
840a0653 | 129 | | 1*SD_BALANCE_NEWIDLE \ |
47734f89 IM |
130 | | 1*SD_BALANCE_EXEC \ |
131 | | 1*SD_BALANCE_FORK \ | |
182a85f8 | 132 | | 0*SD_BALANCE_WAKE \ |
47734f89 | 133 | | 1*SD_WAKE_AFFINE \ |
799e2205 | 134 | | 0*SD_PREFER_LOCAL \ |
47734f89 IM |
135 | | 0*SD_SHARE_CPUPOWER \ |
136 | | 1*SD_SHARE_PKG_RESOURCES \ | |
137 | | 0*SD_SERIALIZE \ | |
47734f89 IM |
138 | | sd_balance_for_mc_power() \ |
139 | | sd_power_saving_flags() \ | |
140 | , \ | |
141 | .last_balance = jiffies, \ | |
142 | .balance_interval = 1, \ | |
89c4710e SS |
143 | } |
144 | #endif | |
145 | #endif /* CONFIG_SCHED_MC */ | |
146 | ||
1da177e4 LT |
147 | /* Common values for CPUs */ |
148 | #ifndef SD_CPU_INIT | |
47734f89 IM |
149 | #define SD_CPU_INIT (struct sched_domain) { \ |
150 | .min_interval = 1, \ | |
151 | .max_interval = 4, \ | |
152 | .busy_factor = 64, \ | |
153 | .imbalance_pct = 125, \ | |
154 | .cache_nice_tries = 1, \ | |
155 | .busy_idx = 2, \ | |
156 | .idle_idx = 1, \ | |
0ec9fab3 | 157 | .newidle_idx = 0, \ |
78e7ed53 | 158 | .wake_idx = 0, \ |
b8a543ea | 159 | .forkexec_idx = 0, \ |
47734f89 IM |
160 | \ |
161 | .flags = 1*SD_LOAD_BALANCE \ | |
840a0653 | 162 | | 1*SD_BALANCE_NEWIDLE \ |
47734f89 IM |
163 | | 1*SD_BALANCE_EXEC \ |
164 | | 1*SD_BALANCE_FORK \ | |
182a85f8 | 165 | | 0*SD_BALANCE_WAKE \ |
6bd7821f | 166 | | 1*SD_WAKE_AFFINE \ |
799e2205 | 167 | | 0*SD_PREFER_LOCAL \ |
47734f89 IM |
168 | | 0*SD_SHARE_CPUPOWER \ |
169 | | 0*SD_SHARE_PKG_RESOURCES \ | |
170 | | 0*SD_SERIALIZE \ | |
47734f89 IM |
171 | | sd_balance_for_package_power() \ |
172 | | sd_power_saving_flags() \ | |
173 | , \ | |
174 | .last_balance = jiffies, \ | |
175 | .balance_interval = 1, \ | |
1da177e4 LT |
176 | } |
177 | #endif | |
178 | ||
9c1cfda2 | 179 | /* sched_domains SD_ALLNODES_INIT for NUMA machines */ |
47734f89 IM |
180 | #define SD_ALLNODES_INIT (struct sched_domain) { \ |
181 | .min_interval = 64, \ | |
182 | .max_interval = 64*num_online_cpus(), \ | |
183 | .busy_factor = 128, \ | |
184 | .imbalance_pct = 133, \ | |
185 | .cache_nice_tries = 1, \ | |
186 | .busy_idx = 3, \ | |
187 | .idle_idx = 3, \ | |
188 | .flags = 1*SD_LOAD_BALANCE \ | |
189 | | 1*SD_BALANCE_NEWIDLE \ | |
190 | | 0*SD_BALANCE_EXEC \ | |
191 | | 0*SD_BALANCE_FORK \ | |
c88d5910 | 192 | | 0*SD_BALANCE_WAKE \ |
6bd7821f | 193 | | 0*SD_WAKE_AFFINE \ |
47734f89 IM |
194 | | 0*SD_SHARE_CPUPOWER \ |
195 | | 0*SD_POWERSAVINGS_BALANCE \ | |
196 | | 0*SD_SHARE_PKG_RESOURCES \ | |
197 | | 1*SD_SERIALIZE \ | |
47734f89 IM |
198 | | 0*SD_PREFER_SIBLING \ |
199 | , \ | |
200 | .last_balance = jiffies, \ | |
201 | .balance_interval = 64, \ | |
9c1cfda2 JH |
202 | } |
203 | ||
590e4d85 AB |
204 | #ifndef SD_NODES_PER_DOMAIN |
205 | #define SD_NODES_PER_DOMAIN 16 | |
206 | #endif | |
207 | ||
01a08546 HC |
208 | #ifdef CONFIG_SCHED_BOOK |
209 | #ifndef SD_BOOK_INIT | |
210 | #error Please define an appropriate SD_BOOK_INIT in include/asm/topology.h!!! | |
211 | #endif | |
212 | #endif /* CONFIG_SCHED_BOOK */ | |
213 | ||
1da177e4 LT |
214 | #ifdef CONFIG_NUMA |
215 | #ifndef SD_NODE_INIT | |
216 | #error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!! | |
217 | #endif | |
72812019 | 218 | |
1da177e4 LT |
219 | #endif /* CONFIG_NUMA */ |
220 | ||
72812019 LS |
221 | #ifdef CONFIG_USE_PERCPU_NUMA_NODE_ID |
222 | DECLARE_PER_CPU(int, numa_node); | |
223 | ||
224 | #ifndef numa_node_id | |
225 | /* Returns the number of the current Node. */ | |
226 | static inline int numa_node_id(void) | |
227 | { | |
228 | return __this_cpu_read(numa_node); | |
229 | } | |
230 | #endif | |
231 | ||
232 | #ifndef cpu_to_node | |
233 | static inline int cpu_to_node(int cpu) | |
234 | { | |
235 | return per_cpu(numa_node, cpu); | |
236 | } | |
237 | #endif | |
238 | ||
239 | #ifndef set_numa_node | |
240 | static inline void set_numa_node(int node) | |
241 | { | |
242 | percpu_write(numa_node, node); | |
243 | } | |
244 | #endif | |
245 | ||
246 | #ifndef set_cpu_numa_node | |
247 | static inline void set_cpu_numa_node(int cpu, int node) | |
248 | { | |
249 | per_cpu(numa_node, cpu) = node; | |
250 | } | |
251 | #endif | |
252 | ||
253 | #else /* !CONFIG_USE_PERCPU_NUMA_NODE_ID */ | |
254 | ||
255 | /* Returns the number of the current Node. */ | |
256 | #ifndef numa_node_id | |
257 | static inline int numa_node_id(void) | |
258 | { | |
259 | return cpu_to_node(raw_smp_processor_id()); | |
260 | } | |
261 | #endif | |
262 | ||
263 | #endif /* [!]CONFIG_USE_PERCPU_NUMA_NODE_ID */ | |
264 | ||
7aac7898 LS |
265 | #ifdef CONFIG_HAVE_MEMORYLESS_NODES |
266 | ||
267 | /* | |
268 | * N.B., Do NOT reference the '_numa_mem_' per cpu variable directly. | |
269 | * It will not be defined when CONFIG_HAVE_MEMORYLESS_NODES is not defined. | |
270 | * Use the accessor functions set_numa_mem(), numa_mem_id() and cpu_to_mem(). | |
271 | */ | |
272 | DECLARE_PER_CPU(int, _numa_mem_); | |
273 | ||
274 | #ifndef set_numa_mem | |
275 | static inline void set_numa_mem(int node) | |
276 | { | |
277 | percpu_write(_numa_mem_, node); | |
278 | } | |
279 | #endif | |
280 | ||
281 | #ifndef numa_mem_id | |
282 | /* Returns the number of the nearest Node with memory */ | |
283 | static inline int numa_mem_id(void) | |
284 | { | |
285 | return __this_cpu_read(_numa_mem_); | |
286 | } | |
287 | #endif | |
288 | ||
289 | #ifndef cpu_to_mem | |
290 | static inline int cpu_to_mem(int cpu) | |
291 | { | |
292 | return per_cpu(_numa_mem_, cpu); | |
293 | } | |
294 | #endif | |
295 | ||
296 | #ifndef set_cpu_numa_mem | |
297 | static inline void set_cpu_numa_mem(int cpu, int node) | |
298 | { | |
299 | per_cpu(_numa_mem_, cpu) = node; | |
300 | } | |
301 | #endif | |
302 | ||
303 | #else /* !CONFIG_HAVE_MEMORYLESS_NODES */ | |
304 | ||
7aac7898 LS |
305 | #ifndef numa_mem_id |
306 | /* Returns the number of the nearest Node with memory */ | |
307 | static inline int numa_mem_id(void) | |
308 | { | |
309 | return numa_node_id(); | |
310 | } | |
311 | #endif | |
312 | ||
313 | #ifndef cpu_to_mem | |
314 | static inline int cpu_to_mem(int cpu) | |
315 | { | |
316 | return cpu_to_node(cpu); | |
317 | } | |
318 | #endif | |
319 | ||
320 | #endif /* [!]CONFIG_HAVE_MEMORYLESS_NODES */ | |
321 | ||
c50cbb05 BH |
322 | #ifndef topology_physical_package_id |
323 | #define topology_physical_package_id(cpu) ((void)(cpu), -1) | |
324 | #endif | |
325 | #ifndef topology_core_id | |
326 | #define topology_core_id(cpu) ((void)(cpu), 0) | |
327 | #endif | |
fbd59a8d RR |
328 | #ifndef topology_thread_cpumask |
329 | #define topology_thread_cpumask(cpu) cpumask_of(cpu) | |
330 | #endif | |
331 | #ifndef topology_core_cpumask | |
332 | #define topology_core_cpumask(cpu) cpumask_of(cpu) | |
333 | #endif | |
c50cbb05 | 334 | |
1da177e4 | 335 | #endif /* _LINUX_TOPOLOGY_H */ |