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Diffstat (limited to 'libdde-linux26/libdde_linux26/contrib/include/linux/topology.h')
| -rw-r--r-- | libdde-linux26/libdde_linux26/contrib/include/linux/topology.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/libdde-linux26/libdde_linux26/contrib/include/linux/topology.h b/libdde-linux26/libdde_linux26/contrib/include/linux/topology.h new file mode 100644 index 00000000..e632d29f --- /dev/null +++ b/libdde-linux26/libdde_linux26/contrib/include/linux/topology.h @@ -0,0 +1,197 @@ +/* + * 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) \ + ({ \ + node_to_cpumask_ptr(__tmp__, node); \ + cpus_weight(*__tmp__); \ + }) +#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, \ +} +#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 + +#endif /* _LINUX_TOPOLOGY_H */ |