| /* |
| * 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_weight(cpumask_of_node(node)) |
| #endif |
| |
| #define for_each_node_with_cpus(node) \ |
| for_each_online_node(node) \ |
| if (nr_cpus_node(node)) |
| |
| int arch_update_cpu_topology(void); |
| |
| /* Conform to ACPI 2.0 SLIT distance definitions */ |
| #define LOCAL_DISTANCE 10 |
| #define REMOTE_DISTANCE 20 |
| #ifndef node_distance |
| #define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) |
| #endif |
| #ifndef RECLAIM_DISTANCE |
| /* |
| * If the distance between nodes in a system is larger than RECLAIM_DISTANCE |
| * (in whatever arch specific measurement units returned by node_distance()) |
| * then switch on zone reclaim on boot. |
| */ |
| #define RECLAIM_DISTANCE 20 |
| #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. |
| * (Only non-zero and non-null fields need be specified.) |
| */ |
| |
| #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) { \ |
| .min_interval = 1, \ |
| .max_interval = 2, \ |
| .busy_factor = 64, \ |
| .imbalance_pct = 110, \ |
| .flags = SD_LOAD_BALANCE \ |
| | SD_BALANCE_NEWIDLE \ |
| | SD_BALANCE_FORK \ |
| | SD_BALANCE_EXEC \ |
| | SD_WAKE_AFFINE \ |
| | SD_WAKE_BALANCE \ |
| | SD_SHARE_CPUPOWER, \ |
| .last_balance = jiffies, \ |
| .balance_interval = 1, \ |
| .smt_gain = 1178, /* 15% */ \ |
| } |
| #endif |
| #endif /* CONFIG_SCHED_SMT */ |
| |
| #ifdef CONFIG_SCHED_MC |
| /* Common values for MC siblings. for now mostly derived from SD_CPU_INIT */ |
| #ifndef SD_MC_INIT |
| #define SD_MC_INIT (struct sched_domain) { \ |
| .min_interval = 1, \ |
| .max_interval = 4, \ |
| .busy_factor = 64, \ |
| .imbalance_pct = 125, \ |
| .cache_nice_tries = 1, \ |
| .busy_idx = 2, \ |
| .wake_idx = 1, \ |
| .forkexec_idx = 1, \ |
| .flags = SD_LOAD_BALANCE \ |
| | SD_BALANCE_FORK \ |
| | SD_BALANCE_EXEC \ |
| | SD_WAKE_AFFINE \ |
| | SD_WAKE_BALANCE \ |
| | SD_SHARE_PKG_RESOURCES\ |
| | sd_balance_for_mc_power()\ |
| | sd_power_saving_flags(),\ |
| .last_balance = jiffies, \ |
| .balance_interval = 1, \ |
| } |
| #endif |
| #endif /* CONFIG_SCHED_MC */ |
| |
| /* Common values for CPUs */ |
| #ifndef SD_CPU_INIT |
| #define SD_CPU_INIT (struct sched_domain) { \ |
| .min_interval = 1, \ |
| .max_interval = 4, \ |
| .busy_factor = 64, \ |
| .imbalance_pct = 125, \ |
| .cache_nice_tries = 1, \ |
| .busy_idx = 2, \ |
| .idle_idx = 1, \ |
| .newidle_idx = 2, \ |
| .wake_idx = 1, \ |
| .forkexec_idx = 1, \ |
| .flags = SD_LOAD_BALANCE \ |
| | SD_BALANCE_EXEC \ |
| | SD_BALANCE_FORK \ |
| | SD_WAKE_AFFINE \ |
| | SD_WAKE_BALANCE \ |
| | sd_balance_for_package_power()\ |
| | sd_power_saving_flags(),\ |
| .last_balance = jiffies, \ |
| .balance_interval = 1, \ |
| } |
| #endif |
| |
| /* sched_domains SD_ALLNODES_INIT for NUMA machines */ |
| #define SD_ALLNODES_INIT (struct sched_domain) { \ |
| .min_interval = 64, \ |
| .max_interval = 64*num_online_cpus(), \ |
| .busy_factor = 128, \ |
| .imbalance_pct = 133, \ |
| .cache_nice_tries = 1, \ |
| .busy_idx = 3, \ |
| .idle_idx = 3, \ |
| .flags = SD_LOAD_BALANCE \ |
| | SD_BALANCE_NEWIDLE \ |
| | SD_WAKE_AFFINE \ |
| | SD_SERIALIZE, \ |
| .last_balance = jiffies, \ |
| .balance_interval = 64, \ |
| } |
| |
| #ifdef CONFIG_NUMA |
| #ifndef SD_NODE_INIT |
| #error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!! |
| #endif |
| #endif /* CONFIG_NUMA */ |
| |
| #ifndef topology_physical_package_id |
| #define topology_physical_package_id(cpu) ((void)(cpu), -1) |
| #endif |
| #ifndef topology_core_id |
| #define topology_core_id(cpu) ((void)(cpu), 0) |
| #endif |
| #ifndef topology_thread_siblings |
| #define topology_thread_siblings(cpu) cpumask_of_cpu(cpu) |
| #endif |
| #ifndef topology_core_siblings |
| #define topology_core_siblings(cpu) cpumask_of_cpu(cpu) |
| #endif |
| #ifndef topology_thread_cpumask |
| #define topology_thread_cpumask(cpu) cpumask_of(cpu) |
| #endif |
| #ifndef topology_core_cpumask |
| #define topology_core_cpumask(cpu) cpumask_of(cpu) |
| #endif |
| |
| /* Returns the number of the current Node. */ |
| #ifndef numa_node_id |
| #define numa_node_id() (cpu_to_node(raw_smp_processor_id())) |
| #endif |
| |
| #endif /* _LINUX_TOPOLOGY_H */ |