/* * Copyright (c) 2007 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #ifndef _KERN_CPU_AFFINITY_H_ #define _KERN_CPU_AFFINITY_H_ #include <kern/queue.h> #include <kern/processor.h> #include <kern/lock.h> /* * An affinity set object represents a set of threads identified by the user * to be sharing (cache) affinity. A task may have multiple affinity sets * defined. Each set has dis-affinity other sets. Tasks related by inheritance * may share the same affinity set namespace. * Affinity sets are used to advise (hint) thread placement. */ struct affinity_set { struct affinity_space *aset_space; /* namespace */ queue_chain_t aset_affinities; /* links affinities in group */ queue_head_t aset_threads; /* threads in affinity set */ uint32_t aset_thread_count; /* num threads in set */ uint32_t aset_tag; /* user-assigned tag */ uint32_t aset_num; /* kernel-assigned affinity */ processor_set_t aset_pset; /* processor set */ }; extern boolean_t thread_affinity_is_supported(void); extern kern_return_t thread_affinity_set(thread_t thread, uint32_t tag); extern uint32_t thread_affinity_get(thread_t thread); extern void thread_affinity_dup(thread_t parent, thread_t child); extern void thread_affinity_terminate(thread_t thread); extern void task_affinity_create( task_t, task_t); extern void task_affinity_deallocate( task_t); extern kern_return_t task_affinity_info( task_t, task_info_t, mach_msg_type_number_t *); #endif /* _KERN_CPU_AFFINITY_H_ */