]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * include/linux/topology.h | |
3 | * | |
4 | * Written by: Matthew Dobson, IBM Corporation | |
5 | * | |
6 | * Copyright (C) 2002, IBM Corp. | |
7 | * | |
8 | * All rights reserved. | |
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 | |
41 | #define nr_cpus_node(node) \ | |
42 | ({ \ | |
43 | node_to_cpumask_ptr(__tmp__, node); \ | |
44 | cpus_weight(*__tmp__); \ | |
45 | }) | |
46 | #endif | |
47 | ||
48 | #define for_each_node_with_cpus(node) \ | |
49 | for_each_online_node(node) \ | |
50 | if (nr_cpus_node(node)) | |
51 | ||
52 | void arch_update_cpu_topology(void); | |
53 | ||
54 | /* Conform to ACPI 2.0 SLIT distance definitions */ | |
55 | #define LOCAL_DISTANCE 10 | |
56 | #define REMOTE_DISTANCE 20 | |
57 | #ifndef node_distance | |
58 | #define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) | |
59 | #endif | |
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 | |
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. | |
82 | * (Only non-zero and non-null fields need be specified.) | |
83 | */ | |
84 | ||
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) { \ | |
93 | .min_interval = 1, \ | |
94 | .max_interval = 2, \ | |
95 | .busy_factor = 64, \ | |
96 | .imbalance_pct = 110, \ | |
97 | .flags = SD_LOAD_BALANCE \ | |
98 | | SD_BALANCE_NEWIDLE \ | |
99 | | SD_BALANCE_FORK \ | |
100 | | SD_BALANCE_EXEC \ | |
101 | | SD_WAKE_AFFINE \ | |
102 | | SD_WAKE_IDLE \ | |
103 | | SD_SHARE_CPUPOWER, \ | |
104 | .last_balance = jiffies, \ | |
105 | .balance_interval = 1, \ | |
106 | } | |
107 | #endif | |
108 | #endif /* CONFIG_SCHED_SMT */ | |
109 | ||
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) { \ | |
114 | .min_interval = 1, \ | |
115 | .max_interval = 4, \ | |
116 | .busy_factor = 64, \ | |
117 | .imbalance_pct = 125, \ | |
118 | .cache_nice_tries = 1, \ | |
119 | .busy_idx = 2, \ | |
120 | .wake_idx = 1, \ | |
121 | .forkexec_idx = 1, \ | |
122 | .flags = SD_LOAD_BALANCE \ | |
123 | | SD_BALANCE_NEWIDLE \ | |
124 | | SD_BALANCE_FORK \ | |
125 | | SD_BALANCE_EXEC \ | |
126 | | SD_WAKE_AFFINE \ | |
127 | | SD_SHARE_PKG_RESOURCES\ | |
128 | | BALANCE_FOR_MC_POWER, \ | |
129 | .last_balance = jiffies, \ | |
130 | .balance_interval = 1, \ | |
131 | } | |
132 | #endif | |
133 | #endif /* CONFIG_SCHED_MC */ | |
134 | ||
135 | /* Common values for CPUs */ | |
136 | #ifndef SD_CPU_INIT | |
137 | #define SD_CPU_INIT (struct sched_domain) { \ | |
138 | .min_interval = 1, \ | |
139 | .max_interval = 4, \ | |
140 | .busy_factor = 64, \ | |
141 | .imbalance_pct = 125, \ | |
142 | .cache_nice_tries = 1, \ | |
143 | .busy_idx = 2, \ | |
144 | .idle_idx = 1, \ | |
145 | .newidle_idx = 2, \ | |
146 | .wake_idx = 1, \ | |
147 | .forkexec_idx = 1, \ | |
148 | .flags = SD_LOAD_BALANCE \ | |
149 | | SD_BALANCE_NEWIDLE \ | |
150 | | SD_BALANCE_FORK \ | |
151 | | SD_BALANCE_EXEC \ | |
152 | | SD_WAKE_AFFINE \ | |
153 | | BALANCE_FOR_PKG_POWER,\ | |
154 | .last_balance = jiffies, \ | |
155 | .balance_interval = 1, \ | |
156 | } | |
157 | #endif | |
158 | ||
159 | /* sched_domains SD_ALLNODES_INIT for NUMA machines */ | |
160 | #define SD_ALLNODES_INIT (struct sched_domain) { \ | |
161 | .min_interval = 64, \ | |
162 | .max_interval = 64*num_online_cpus(), \ | |
163 | .busy_factor = 128, \ | |
164 | .imbalance_pct = 133, \ | |
165 | .cache_nice_tries = 1, \ | |
166 | .busy_idx = 3, \ | |
167 | .idle_idx = 3, \ | |
168 | .flags = SD_LOAD_BALANCE \ | |
169 | | SD_BALANCE_NEWIDLE \ | |
170 | | SD_WAKE_AFFINE \ | |
171 | | SD_SERIALIZE, \ | |
172 | .last_balance = jiffies, \ | |
173 | .balance_interval = 64, \ | |
174 | } | |
175 | ||
176 | #ifdef CONFIG_NUMA | |
177 | #ifndef SD_NODE_INIT | |
178 | #error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!! | |
179 | #endif | |
180 | #endif /* CONFIG_NUMA */ | |
181 | ||
182 | #endif /* _LINUX_TOPOLOGY_H */ |