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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> | |
34 | #include <asm/topology.h> | |
35 | ||
36 | #ifndef node_has_online_mem | |
37 | #define node_has_online_mem(nid) (1) | |
38 | #endif | |
39 | ||
40 | #ifndef nr_cpus_node | |
7c16ec58 MT |
41 | #define nr_cpus_node(node) \ |
42 | ({ \ | |
43 | node_to_cpumask_ptr(__tmp__, node); \ | |
44 | cpus_weight(*__tmp__); \ | |
1da177e4 LT |
45 | }) |
46 | #endif | |
47 | ||
7c16ec58 MT |
48 | #define for_each_node_with_cpus(node) \ |
49 | for_each_online_node(node) \ | |
1da177e4 LT |
50 | if (nr_cpus_node(node)) |
51 | ||
ee79d1bd | 52 | int arch_update_cpu_topology(void); |
22e52b07 | 53 | |
1da177e4 LT |
54 | /* Conform to ACPI 2.0 SLIT distance definitions */ |
55 | #define LOCAL_DISTANCE 10 | |
56 | #define REMOTE_DISTANCE 20 | |
f787a503 | 57 | #ifndef node_distance |
1da177e4 LT |
58 | #define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) |
59 | #endif | |
9eeff239 CL |
60 | #ifndef RECLAIM_DISTANCE |
61 | /* | |
62 | * If the distance between nodes in a system is larger than RECLAIM_DISTANCE | |
63 | * (in whatever arch specific measurement units returned by node_distance()) | |
64 | * then switch on zone reclaim on boot. | |
65 | */ | |
66 | #define RECLAIM_DISTANCE 20 | |
67 | #endif | |
1da177e4 LT |
68 | #ifndef PENALTY_FOR_NODE_WITH_CPUS |
69 | #define PENALTY_FOR_NODE_WITH_CPUS (1) | |
70 | #endif | |
71 | ||
72 | /* | |
73 | * Below are the 3 major initializers used in building sched_domains: | |
74 | * SD_SIBLING_INIT, for SMT domains | |
75 | * SD_CPU_INIT, for SMP domains | |
76 | * SD_NODE_INIT, for NUMA domains | |
77 | * | |
78 | * Any architecture that cares to do any tuning to these values should do so | |
79 | * by defining their own arch-specific initializer in include/asm/topology.h. | |
80 | * A definition there will automagically override these default initializers | |
81 | * and allow arch-specific performance tuning of sched_domains. | |
7c16ec58 | 82 | * (Only non-zero and non-null fields need be specified.) |
1da177e4 | 83 | */ |
7c16ec58 | 84 | |
1da177e4 LT |
85 | #ifdef CONFIG_SCHED_SMT |
86 | /* MCD - Do we really need this? It is always on if CONFIG_SCHED_SMT is, | |
87 | * so can't we drop this in favor of CONFIG_SCHED_SMT? | |
88 | */ | |
89 | #define ARCH_HAS_SCHED_WAKE_IDLE | |
90 | /* Common values for SMT siblings */ | |
91 | #ifndef SD_SIBLING_INIT | |
92 | #define SD_SIBLING_INIT (struct sched_domain) { \ | |
1da177e4 LT |
93 | .min_interval = 1, \ |
94 | .max_interval = 2, \ | |
ac7d5504 | 95 | .busy_factor = 64, \ |
1da177e4 | 96 | .imbalance_pct = 110, \ |
1da177e4 LT |
97 | .flags = SD_LOAD_BALANCE \ |
98 | | SD_BALANCE_NEWIDLE \ | |
52d85343 | 99 | | SD_BALANCE_FORK \ |
1da177e4 LT |
100 | | SD_BALANCE_EXEC \ |
101 | | SD_WAKE_AFFINE \ | |
52c642f3 | 102 | | SD_WAKE_BALANCE \ |
1da177e4 LT |
103 | | SD_SHARE_CPUPOWER, \ |
104 | .last_balance = jiffies, \ | |
105 | .balance_interval = 1, \ | |
1da177e4 LT |
106 | } |
107 | #endif | |
108 | #endif /* CONFIG_SCHED_SMT */ | |
109 | ||
89c4710e SS |
110 | #ifdef CONFIG_SCHED_MC |
111 | /* Common values for MC siblings. for now mostly derived from SD_CPU_INIT */ | |
112 | #ifndef SD_MC_INIT | |
113 | #define SD_MC_INIT (struct sched_domain) { \ | |
89c4710e SS |
114 | .min_interval = 1, \ |
115 | .max_interval = 4, \ | |
116 | .busy_factor = 64, \ | |
117 | .imbalance_pct = 125, \ | |
118 | .cache_nice_tries = 1, \ | |
89c4710e | 119 | .busy_idx = 2, \ |
89c4710e SS |
120 | .wake_idx = 1, \ |
121 | .forkexec_idx = 1, \ | |
122 | .flags = SD_LOAD_BALANCE \ | |
52d85343 | 123 | | SD_BALANCE_FORK \ |
89c4710e SS |
124 | | SD_BALANCE_EXEC \ |
125 | | SD_WAKE_AFFINE \ | |
14800984 | 126 | | SD_WAKE_BALANCE \ |
89c4710e | 127 | | SD_SHARE_PKG_RESOURCES\ |
100fdaee VS |
128 | | sd_balance_for_mc_power()\ |
129 | | sd_power_saving_flags(),\ | |
89c4710e SS |
130 | .last_balance = jiffies, \ |
131 | .balance_interval = 1, \ | |
89c4710e SS |
132 | } |
133 | #endif | |
134 | #endif /* CONFIG_SCHED_MC */ | |
135 | ||
1da177e4 LT |
136 | /* Common values for CPUs */ |
137 | #ifndef SD_CPU_INIT | |
138 | #define SD_CPU_INIT (struct sched_domain) { \ | |
1da177e4 LT |
139 | .min_interval = 1, \ |
140 | .max_interval = 4, \ | |
141 | .busy_factor = 64, \ | |
142 | .imbalance_pct = 125, \ | |
1da177e4 | 143 | .cache_nice_tries = 1, \ |
7897986b | 144 | .busy_idx = 2, \ |
95dbb421 IM |
145 | .idle_idx = 1, \ |
146 | .newidle_idx = 2, \ | |
7897986b | 147 | .wake_idx = 1, \ |
687f1661 | 148 | .forkexec_idx = 1, \ |
1da177e4 | 149 | .flags = SD_LOAD_BALANCE \ |
1da177e4 | 150 | | SD_BALANCE_EXEC \ |
9fcd18c9 | 151 | | SD_BALANCE_FORK \ |
5c45bf27 | 152 | | SD_WAKE_AFFINE \ |
9fcd18c9 | 153 | | SD_WAKE_BALANCE \ |
100fdaee VS |
154 | | sd_balance_for_package_power()\ |
155 | | sd_power_saving_flags(),\ | |
1da177e4 LT |
156 | .last_balance = jiffies, \ |
157 | .balance_interval = 1, \ | |
1da177e4 LT |
158 | } |
159 | #endif | |
160 | ||
9c1cfda2 JH |
161 | /* sched_domains SD_ALLNODES_INIT for NUMA machines */ |
162 | #define SD_ALLNODES_INIT (struct sched_domain) { \ | |
9c1cfda2 JH |
163 | .min_interval = 64, \ |
164 | .max_interval = 64*num_online_cpus(), \ | |
165 | .busy_factor = 128, \ | |
166 | .imbalance_pct = 133, \ | |
9c1cfda2 JH |
167 | .cache_nice_tries = 1, \ |
168 | .busy_idx = 3, \ | |
169 | .idle_idx = 3, \ | |
08c183f3 | 170 | .flags = SD_LOAD_BALANCE \ |
ea3f01f8 IM |
171 | | SD_BALANCE_NEWIDLE \ |
172 | | SD_WAKE_AFFINE \ | |
173 | | SD_SERIALIZE, \ | |
9c1cfda2 JH |
174 | .last_balance = jiffies, \ |
175 | .balance_interval = 64, \ | |
9c1cfda2 JH |
176 | } |
177 | ||
1da177e4 LT |
178 | #ifdef CONFIG_NUMA |
179 | #ifndef SD_NODE_INIT | |
180 | #error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!! | |
181 | #endif | |
182 | #endif /* CONFIG_NUMA */ | |
183 | ||
c50cbb05 BH |
184 | #ifndef topology_physical_package_id |
185 | #define topology_physical_package_id(cpu) ((void)(cpu), -1) | |
186 | #endif | |
187 | #ifndef topology_core_id | |
188 | #define topology_core_id(cpu) ((void)(cpu), 0) | |
189 | #endif | |
190 | #ifndef topology_thread_siblings | |
191 | #define topology_thread_siblings(cpu) cpumask_of_cpu(cpu) | |
192 | #endif | |
193 | #ifndef topology_core_siblings | |
194 | #define topology_core_siblings(cpu) cpumask_of_cpu(cpu) | |
195 | #endif | |
196 | ||
1da177e4 | 197 | #endif /* _LINUX_TOPOLOGY_H */ |