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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | /* * include/linux/topology.h * * Written by: Matthew Dobson, IBM Corporation * * Copyright (C) 2002, IBM Corp. * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Send feedback to <colpatch@us.ibm.com> */ #ifndef _LINUX_TOPOLOGY_H #define _LINUX_TOPOLOGY_H #include <linux/cpumask.h> #include <linux/bitops.h> #include <linux/mmzone.h> #include <linux/smp.h> #include <asm/topology.h> #ifndef node_has_online_mem #define node_has_online_mem(nid) (1) #endif #ifndef nr_cpus_node #define nr_cpus_node(node) \ ({ \ cpumask_t __tmp__; \ __tmp__ = node_to_cpumask(node); \ cpus_weight(__tmp__); \ }) #endif #define for_each_node_with_cpus(node) \ for_each_online_node(node) \ if (nr_cpus_node(node)) #ifndef node_distance /* Conform to ACPI 2.0 SLIT distance definitions */ #define LOCAL_DISTANCE 10 #define REMOTE_DISTANCE 20 #define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) #endif #ifndef PENALTY_FOR_NODE_WITH_CPUS #define PENALTY_FOR_NODE_WITH_CPUS (1) #endif /* * Below are the 3 major initializers used in building sched_domains: * SD_SIBLING_INIT, for SMT domains * SD_CPU_INIT, for SMP domains * SD_NODE_INIT, for NUMA domains * * Any architecture that cares to do any tuning to these values should do so * by defining their own arch-specific initializer in include/asm/topology.h. * A definition there will automagically override these default initializers * and allow arch-specific performance tuning of sched_domains. */ #ifdef CONFIG_SCHED_SMT /* MCD - Do we really need this? It is always on if CONFIG_SCHED_SMT is, * so can't we drop this in favor of CONFIG_SCHED_SMT? */ #define ARCH_HAS_SCHED_WAKE_IDLE /* Common values for SMT siblings */ #ifndef SD_SIBLING_INIT #define SD_SIBLING_INIT (struct sched_domain) { \ .span = CPU_MASK_NONE, \ .parent = NULL, \ .groups = NULL, \ .min_interval = 1, \ .max_interval = 2, \ .busy_factor = 8, \ .imbalance_pct = 110, \ .cache_hot_time = 0, \ .cache_nice_tries = 0, \ .per_cpu_gain = 25, \ .busy_idx = 0, \ .idle_idx = 0, \ .newidle_idx = 1, \ .wake_idx = 0, \ .forkexec_idx = 0, \ .flags = SD_LOAD_BALANCE \ | SD_BALANCE_NEWIDLE \ | SD_BALANCE_EXEC \ | SD_WAKE_AFFINE \ | SD_WAKE_IDLE \ | SD_SHARE_CPUPOWER, \ .last_balance = jiffies, \ .balance_interval = 1, \ .nr_balance_failed = 0, \ } #endif #endif /* CONFIG_SCHED_SMT */ /* Common values for CPUs */ #ifndef SD_CPU_INIT #define SD_CPU_INIT (struct sched_domain) { \ .span = CPU_MASK_NONE, \ .parent = NULL, \ .groups = NULL, \ .min_interval = 1, \ .max_interval = 4, \ .busy_factor = 64, \ .imbalance_pct = 125, \ .cache_hot_time = (5*1000000/2), \ .cache_nice_tries = 1, \ .per_cpu_gain = 100, \ .busy_idx = 2, \ .idle_idx = 1, \ .newidle_idx = 2, \ .wake_idx = 1, \ .forkexec_idx = 1, \ .flags = SD_LOAD_BALANCE \ | SD_BALANCE_NEWIDLE \ | SD_BALANCE_EXEC \ | SD_WAKE_AFFINE, \ .last_balance = jiffies, \ .balance_interval = 1, \ .nr_balance_failed = 0, \ } #endif /* sched_domains SD_ALLNODES_INIT for NUMA machines */ #define SD_ALLNODES_INIT (struct sched_domain) { \ .span = CPU_MASK_NONE, \ .parent = NULL, \ .groups = NULL, \ .min_interval = 64, \ .max_interval = 64*num_online_cpus(), \ .busy_factor = 128, \ .imbalance_pct = 133, \ .cache_hot_time = (10*1000000), \ .cache_nice_tries = 1, \ .busy_idx = 3, \ .idle_idx = 3, \ .newidle_idx = 0, /* unused */ \ .wake_idx = 0, /* unused */ \ .forkexec_idx = 0, /* unused */ \ .per_cpu_gain = 100, \ .flags = SD_LOAD_BALANCE, \ .last_balance = jiffies, \ .balance_interval = 64, \ .nr_balance_failed = 0, \ } #ifdef CONFIG_NUMA #ifndef SD_NODE_INIT #error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!! #endif #endif /* CONFIG_NUMA */ #endif /* _LINUX_TOPOLOGY_H */ |