Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | cpumask_t __tmp__; \ |
| 44 | __tmp__ = node_to_cpumask(node); \ |
| 45 | cpus_weight(__tmp__); \ |
| 46 | }) |
| 47 | #endif |
| 48 | |
| 49 | #define for_each_node_with_cpus(node) \ |
| 50 | for_each_online_node(node) \ |
| 51 | if (nr_cpus_node(node)) |
| 52 | |
| 53 | #ifndef node_distance |
| 54 | /* Conform to ACPI 2.0 SLIT distance definitions */ |
| 55 | #define LOCAL_DISTANCE 10 |
| 56 | #define REMOTE_DISTANCE 20 |
| 57 | #define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) |
| 58 | #endif |
Christoph Lameter | 9eeff23 | 2006-01-18 17:42:31 -0800 | [diff] [blame] | 59 | #ifndef RECLAIM_DISTANCE |
| 60 | /* |
| 61 | * If the distance between nodes in a system is larger than RECLAIM_DISTANCE |
| 62 | * (in whatever arch specific measurement units returned by node_distance()) |
| 63 | * then switch on zone reclaim on boot. |
| 64 | */ |
| 65 | #define RECLAIM_DISTANCE 20 |
| 66 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #ifndef PENALTY_FOR_NODE_WITH_CPUS |
| 68 | #define PENALTY_FOR_NODE_WITH_CPUS (1) |
| 69 | #endif |
| 70 | |
| 71 | /* |
| 72 | * Below are the 3 major initializers used in building sched_domains: |
| 73 | * SD_SIBLING_INIT, for SMT domains |
| 74 | * SD_CPU_INIT, for SMP domains |
| 75 | * SD_NODE_INIT, for NUMA domains |
| 76 | * |
| 77 | * Any architecture that cares to do any tuning to these values should do so |
| 78 | * by defining their own arch-specific initializer in include/asm/topology.h. |
| 79 | * A definition there will automagically override these default initializers |
| 80 | * and allow arch-specific performance tuning of sched_domains. |
| 81 | */ |
| 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 |
| 89 | #define SD_SIBLING_INIT (struct sched_domain) { \ |
| 90 | .span = CPU_MASK_NONE, \ |
| 91 | .parent = NULL, \ |
Siddha, Suresh B | 1a84887 | 2006-10-03 01:14:08 -0700 | [diff] [blame] | 92 | .child = NULL, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | .groups = NULL, \ |
| 94 | .min_interval = 1, \ |
| 95 | .max_interval = 2, \ |
Siddha, Suresh B | ac7d550 | 2006-12-10 02:20:12 -0800 | [diff] [blame] | 96 | .busy_factor = 64, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | .imbalance_pct = 110, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | .cache_nice_tries = 0, \ |
| 99 | .per_cpu_gain = 25, \ |
Nick Piggin | 7897986 | 2005-06-25 14:57:13 -0700 | [diff] [blame] | 100 | .busy_idx = 0, \ |
| 101 | .idle_idx = 0, \ |
Nick Piggin | 687f166 | 2005-06-25 14:57:21 -0700 | [diff] [blame] | 102 | .newidle_idx = 1, \ |
Nick Piggin | 7897986 | 2005-06-25 14:57:13 -0700 | [diff] [blame] | 103 | .wake_idx = 0, \ |
Nick Piggin | 147cbb4 | 2005-06-25 14:57:19 -0700 | [diff] [blame] | 104 | .forkexec_idx = 0, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | .flags = SD_LOAD_BALANCE \ |
| 106 | | SD_BALANCE_NEWIDLE \ |
| 107 | | SD_BALANCE_EXEC \ |
| 108 | | SD_WAKE_AFFINE \ |
| 109 | | SD_WAKE_IDLE \ |
| 110 | | SD_SHARE_CPUPOWER, \ |
| 111 | .last_balance = jiffies, \ |
| 112 | .balance_interval = 1, \ |
| 113 | .nr_balance_failed = 0, \ |
| 114 | } |
| 115 | #endif |
| 116 | #endif /* CONFIG_SCHED_SMT */ |
| 117 | |
Siddha, Suresh B | 89c4710 | 2006-10-03 01:14:09 -0700 | [diff] [blame] | 118 | #ifdef CONFIG_SCHED_MC |
| 119 | /* Common values for MC siblings. for now mostly derived from SD_CPU_INIT */ |
| 120 | #ifndef SD_MC_INIT |
| 121 | #define SD_MC_INIT (struct sched_domain) { \ |
| 122 | .span = CPU_MASK_NONE, \ |
| 123 | .parent = NULL, \ |
| 124 | .child = NULL, \ |
| 125 | .groups = NULL, \ |
| 126 | .min_interval = 1, \ |
| 127 | .max_interval = 4, \ |
| 128 | .busy_factor = 64, \ |
| 129 | .imbalance_pct = 125, \ |
| 130 | .cache_nice_tries = 1, \ |
| 131 | .per_cpu_gain = 100, \ |
| 132 | .busy_idx = 2, \ |
| 133 | .idle_idx = 1, \ |
| 134 | .newidle_idx = 2, \ |
| 135 | .wake_idx = 1, \ |
| 136 | .forkexec_idx = 1, \ |
| 137 | .flags = SD_LOAD_BALANCE \ |
| 138 | | SD_BALANCE_NEWIDLE \ |
| 139 | | SD_BALANCE_EXEC \ |
| 140 | | SD_WAKE_AFFINE \ |
| 141 | | SD_SHARE_PKG_RESOURCES\ |
| 142 | | BALANCE_FOR_MC_POWER, \ |
| 143 | .last_balance = jiffies, \ |
| 144 | .balance_interval = 1, \ |
| 145 | .nr_balance_failed = 0, \ |
| 146 | } |
| 147 | #endif |
| 148 | #endif /* CONFIG_SCHED_MC */ |
| 149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | /* Common values for CPUs */ |
| 151 | #ifndef SD_CPU_INIT |
| 152 | #define SD_CPU_INIT (struct sched_domain) { \ |
| 153 | .span = CPU_MASK_NONE, \ |
| 154 | .parent = NULL, \ |
Siddha, Suresh B | 1a84887 | 2006-10-03 01:14:08 -0700 | [diff] [blame] | 155 | .child = NULL, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | .groups = NULL, \ |
| 157 | .min_interval = 1, \ |
| 158 | .max_interval = 4, \ |
| 159 | .busy_factor = 64, \ |
| 160 | .imbalance_pct = 125, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | .cache_nice_tries = 1, \ |
| 162 | .per_cpu_gain = 100, \ |
Nick Piggin | 7897986 | 2005-06-25 14:57:13 -0700 | [diff] [blame] | 163 | .busy_idx = 2, \ |
Nick Piggin | 687f166 | 2005-06-25 14:57:21 -0700 | [diff] [blame] | 164 | .idle_idx = 1, \ |
| 165 | .newidle_idx = 2, \ |
Nick Piggin | 7897986 | 2005-06-25 14:57:13 -0700 | [diff] [blame] | 166 | .wake_idx = 1, \ |
Nick Piggin | 687f166 | 2005-06-25 14:57:21 -0700 | [diff] [blame] | 167 | .forkexec_idx = 1, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | .flags = SD_LOAD_BALANCE \ |
| 169 | | SD_BALANCE_NEWIDLE \ |
| 170 | | SD_BALANCE_EXEC \ |
Siddha, Suresh B | 5c45bf2 | 2006-06-27 02:54:42 -0700 | [diff] [blame] | 171 | | SD_WAKE_AFFINE \ |
Siddha, Suresh B | 89c4710 | 2006-10-03 01:14:09 -0700 | [diff] [blame] | 172 | | BALANCE_FOR_PKG_POWER,\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | .last_balance = jiffies, \ |
| 174 | .balance_interval = 1, \ |
| 175 | .nr_balance_failed = 0, \ |
| 176 | } |
| 177 | #endif |
| 178 | |
John Hawkes | 9c1cfda | 2005-09-06 15:18:14 -0700 | [diff] [blame] | 179 | /* sched_domains SD_ALLNODES_INIT for NUMA machines */ |
| 180 | #define SD_ALLNODES_INIT (struct sched_domain) { \ |
| 181 | .span = CPU_MASK_NONE, \ |
| 182 | .parent = NULL, \ |
Siddha, Suresh B | 1a84887 | 2006-10-03 01:14:08 -0700 | [diff] [blame] | 183 | .child = NULL, \ |
John Hawkes | 9c1cfda | 2005-09-06 15:18:14 -0700 | [diff] [blame] | 184 | .groups = NULL, \ |
| 185 | .min_interval = 64, \ |
| 186 | .max_interval = 64*num_online_cpus(), \ |
| 187 | .busy_factor = 128, \ |
| 188 | .imbalance_pct = 133, \ |
| 189 | .cache_hot_time = (10*1000000), \ |
| 190 | .cache_nice_tries = 1, \ |
| 191 | .busy_idx = 3, \ |
| 192 | .idle_idx = 3, \ |
| 193 | .newidle_idx = 0, /* unused */ \ |
| 194 | .wake_idx = 0, /* unused */ \ |
| 195 | .forkexec_idx = 0, /* unused */ \ |
| 196 | .per_cpu_gain = 100, \ |
Christoph Lameter | 08c183f | 2006-12-10 02:20:29 -0800 | [diff] [blame] | 197 | .flags = SD_LOAD_BALANCE \ |
| 198 | | SD_SERIALIZE, \ |
John Hawkes | 9c1cfda | 2005-09-06 15:18:14 -0700 | [diff] [blame] | 199 | .last_balance = jiffies, \ |
| 200 | .balance_interval = 64, \ |
| 201 | .nr_balance_failed = 0, \ |
| 202 | } |
| 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | #ifdef CONFIG_NUMA |
| 205 | #ifndef SD_NODE_INIT |
| 206 | #error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!! |
| 207 | #endif |
| 208 | #endif /* CONFIG_NUMA */ |
| 209 | |
| 210 | #endif /* _LINUX_TOPOLOGY_H */ |