/* * 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 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. */#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,			\	.child			= NULL,			\	.groups			= NULL,			\	.min_interval		= 1,			\	.max_interval		= 2,			\	.busy_factor		= 64,			\	.imbalance_pct		= 110,			\	.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 */#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) {		\	.span			= CPU_MASK_NONE,	\	.parent			= NULL,			\	.child			= NULL,			\	.groups			= NULL,			\	.min_interval		= 1,			\	.max_interval		= 4,			\	.busy_factor		= 64,			\	.imbalance_pct		= 125,			\	.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	\				| SD_SHARE_PKG_RESOURCES\				| BALANCE_FOR_MC_POWER,	\	.last_balance		= jiffies,		\	.balance_interval	= 1,			\	.nr_balance_failed	= 0,			\}#endif#endif /* CONFIG_SCHED_MC *//* Common values for CPUs */#ifndef SD_CPU_INIT#define SD_CPU_INIT (struct sched_domain) {		\	.span			= CPU_MASK_NONE,	\	.parent			= NULL,			\	.child			= NULL,			\	.groups			= NULL,			\	.min_interval		= 1,			\	.max_interval		= 4,			\	.busy_factor		= 64,			\	.imbalance_pct		= 125,			\	.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	\				| BALANCE_FOR_PKG_POWER,\	.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,			\	.child			= 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	\				| SD_SERIALIZE,	\	.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 */