linux 内核源代码

				#ifndef _ASM_X86_64_TOPOLOGY_H				#define _ASM_X86_64_TOPOLOGY_H												#ifdef CONFIG_NUMA								#include 				#include 								extern cpumask_t cpu_online_map;								extern unsigned char cpu_to_node[];				extern cpumask_t     node_to_cpumask[];								#ifdef CONFIG_ACPI_NUMA				extern int __node_distance(int, int);				#define node_distance(a,b) __node_distance(a,b)				/* #else fallback version */				#endif								#define cpu_to_node(cpu)		(cpu_to_node[cpu])				#define parent_node(node)		(node)				#define node_to_first_cpu(node) 	(first_cpu(node_to_cpumask[node]))				#define node_to_cpumask(node)		(node_to_cpumask[node])				#define pcibus_to_node(bus)	((struct pci_sysdata *)((bus)->sysdata))->node				#define pcibus_to_cpumask(bus)		node_to_cpumask(pcibus_to_node(bus));								#define numa_node_id()			read_pda(nodenumber)								/* sched_domains SD_NODE_INIT for x86_64 machines */				#define SD_NODE_INIT (struct sched_domain) {		\					.span			= CPU_MASK_NONE,	\					.parent			= NULL,			\					.child			= NULL,			\					.groups			= NULL,			\					.min_interval		= 8,			\					.max_interval		= 32,			\					.busy_factor		= 32,			\					.imbalance_pct		= 125,			\					.cache_nice_tries	= 2,			\					.busy_idx		= 3,			\					.idle_idx		= 2,			\					.newidle_idx		= 0, 			\					.wake_idx		= 1,			\					.forkexec_idx		= 1,			\					.flags			= SD_LOAD_BALANCE	\								| SD_BALANCE_FORK	\								| SD_BALANCE_EXEC	\								| SD_SERIALIZE		\								| SD_WAKE_BALANCE,	\					.last_balance		= jiffies,		\					.balance_interval	= 1,			\					.nr_balance_failed	= 0,			\				}								#endif								#ifdef CONFIG_SMP				#define topology_physical_package_id(cpu)	(cpu_data(cpu).phys_proc_id)				#define topology_core_id(cpu)			(cpu_data(cpu).cpu_core_id)				#define topology_core_siblings(cpu)		(per_cpu(cpu_core_map, cpu))				#define topology_thread_siblings(cpu)		(per_cpu(cpu_sibling_map, cpu))				#define mc_capable()			(boot_cpu_data.x86_max_cores > 1)				#define smt_capable() 			(smp_num_siblings > 1)				#endif								#include 								extern cpumask_t cpu_coregroup_map(int cpu);								#endif