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 | * |
Ingo Molnar | 32525d0 | 2008-01-25 21:08:20 +0100 | [diff] [blame] | 8 | * All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Mike Travis | 7c16ec5 | 2008-04-04 18:11:11 -0700 | [diff] [blame] | 41 | #define nr_cpus_node(node) \ |
| 42 | ({ \ |
| 43 | node_to_cpumask_ptr(__tmp__, node); \ |
| 44 | cpus_weight(*__tmp__); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | }) |
| 46 | #endif |
| 47 | |
Mike Travis | 7c16ec5 | 2008-04-04 18:11:11 -0700 | [diff] [blame] | 48 | #define for_each_node_with_cpus(node) \ |
| 49 | for_each_online_node(node) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | if (nr_cpus_node(node)) |
| 51 | |
Heiko Carstens | 22e52b0 | 2008-03-12 18:31:59 +0100 | [diff] [blame] | 52 | void arch_update_cpu_topology(void); |
| 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | /* Conform to ACPI 2.0 SLIT distance definitions */ |
| 55 | #define LOCAL_DISTANCE 10 |
| 56 | #define REMOTE_DISTANCE 20 |
Ingo Molnar | f787a50 | 2007-07-11 21:21:47 +0200 | [diff] [blame] | 57 | #ifndef node_distance |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) |
| 59 | #endif |
Christoph Lameter | 9eeff23 | 2006-01-18 17:42:31 -0800 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Mike Travis | 7c16ec5 | 2008-04-04 18:11:11 -0700 | [diff] [blame] | 82 | * (Only non-zero and non-null fields need be specified.) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | */ |
Mike Travis | 7c16ec5 | 2008-04-04 18:11:11 -0700 | [diff] [blame] | 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | .min_interval = 1, \ |
| 94 | .max_interval = 2, \ |
Siddha, Suresh B | ac7d550 | 2006-12-10 02:20:12 -0800 | [diff] [blame] | 95 | .busy_factor = 64, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | .imbalance_pct = 110, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | .flags = SD_LOAD_BALANCE \ |
| 98 | | SD_BALANCE_NEWIDLE \ |
Ingo Molnar | 52d8534 | 2008-01-25 21:08:20 +0100 | [diff] [blame] | 99 | | SD_BALANCE_FORK \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | | SD_BALANCE_EXEC \ |
| 101 | | SD_WAKE_AFFINE \ |
| 102 | | SD_WAKE_IDLE \ |
| 103 | | SD_SHARE_CPUPOWER, \ |
| 104 | .last_balance = jiffies, \ |
| 105 | .balance_interval = 1, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | } |
| 107 | #endif |
| 108 | #endif /* CONFIG_SCHED_SMT */ |
| 109 | |
Siddha, Suresh B | 89c4710 | 2006-10-03 01:14:09 -0700 | [diff] [blame] | 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) { \ |
Siddha, Suresh B | 89c4710 | 2006-10-03 01:14:09 -0700 | [diff] [blame] | 114 | .min_interval = 1, \ |
| 115 | .max_interval = 4, \ |
| 116 | .busy_factor = 64, \ |
| 117 | .imbalance_pct = 125, \ |
| 118 | .cache_nice_tries = 1, \ |
Siddha, Suresh B | 89c4710 | 2006-10-03 01:14:09 -0700 | [diff] [blame] | 119 | .busy_idx = 2, \ |
Siddha, Suresh B | 89c4710 | 2006-10-03 01:14:09 -0700 | [diff] [blame] | 120 | .wake_idx = 1, \ |
| 121 | .forkexec_idx = 1, \ |
| 122 | .flags = SD_LOAD_BALANCE \ |
| 123 | | SD_BALANCE_NEWIDLE \ |
Ingo Molnar | 52d8534 | 2008-01-25 21:08:20 +0100 | [diff] [blame] | 124 | | SD_BALANCE_FORK \ |
Siddha, Suresh B | 89c4710 | 2006-10-03 01:14:09 -0700 | [diff] [blame] | 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, \ |
Siddha, Suresh B | 89c4710 | 2006-10-03 01:14:09 -0700 | [diff] [blame] | 131 | } |
| 132 | #endif |
| 133 | #endif /* CONFIG_SCHED_MC */ |
| 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | /* Common values for CPUs */ |
| 136 | #ifndef SD_CPU_INIT |
| 137 | #define SD_CPU_INIT (struct sched_domain) { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | .min_interval = 1, \ |
| 139 | .max_interval = 4, \ |
| 140 | .busy_factor = 64, \ |
| 141 | .imbalance_pct = 125, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | .cache_nice_tries = 1, \ |
Nick Piggin | 7897986 | 2005-06-25 14:57:13 -0700 | [diff] [blame] | 143 | .busy_idx = 2, \ |
Ingo Molnar | 95dbb42 | 2007-10-15 17:00:19 +0200 | [diff] [blame] | 144 | .idle_idx = 1, \ |
| 145 | .newidle_idx = 2, \ |
Nick Piggin | 7897986 | 2005-06-25 14:57:13 -0700 | [diff] [blame] | 146 | .wake_idx = 1, \ |
Nick Piggin | 687f166 | 2005-06-25 14:57:21 -0700 | [diff] [blame] | 147 | .forkexec_idx = 1, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | .flags = SD_LOAD_BALANCE \ |
| 149 | | SD_BALANCE_NEWIDLE \ |
Ingo Molnar | 52d8534 | 2008-01-25 21:08:20 +0100 | [diff] [blame] | 150 | | SD_BALANCE_FORK \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | | SD_BALANCE_EXEC \ |
Siddha, Suresh B | 5c45bf2 | 2006-06-27 02:54:42 -0700 | [diff] [blame] | 152 | | SD_WAKE_AFFINE \ |
Siddha, Suresh B | 89c4710 | 2006-10-03 01:14:09 -0700 | [diff] [blame] | 153 | | BALANCE_FOR_PKG_POWER,\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | .last_balance = jiffies, \ |
| 155 | .balance_interval = 1, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | #endif |
| 158 | |
John Hawkes | 9c1cfda | 2005-09-06 15:18:14 -0700 | [diff] [blame] | 159 | /* sched_domains SD_ALLNODES_INIT for NUMA machines */ |
| 160 | #define SD_ALLNODES_INIT (struct sched_domain) { \ |
John Hawkes | 9c1cfda | 2005-09-06 15:18:14 -0700 | [diff] [blame] | 161 | .min_interval = 64, \ |
| 162 | .max_interval = 64*num_online_cpus(), \ |
| 163 | .busy_factor = 128, \ |
| 164 | .imbalance_pct = 133, \ |
John Hawkes | 9c1cfda | 2005-09-06 15:18:14 -0700 | [diff] [blame] | 165 | .cache_nice_tries = 1, \ |
| 166 | .busy_idx = 3, \ |
| 167 | .idle_idx = 3, \ |
Christoph Lameter | 08c183f | 2006-12-10 02:20:29 -0800 | [diff] [blame] | 168 | .flags = SD_LOAD_BALANCE \ |
| 169 | | SD_SERIALIZE, \ |
John Hawkes | 9c1cfda | 2005-09-06 15:18:14 -0700 | [diff] [blame] | 170 | .last_balance = jiffies, \ |
| 171 | .balance_interval = 64, \ |
John Hawkes | 9c1cfda | 2005-09-06 15:18:14 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | #ifdef CONFIG_NUMA |
| 175 | #ifndef SD_NODE_INIT |
| 176 | #error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!! |
| 177 | #endif |
| 178 | #endif /* CONFIG_NUMA */ |
| 179 | |
| 180 | #endif /* _LINUX_TOPOLOGY_H */ |