1 /* 2 * Copyright (c) 2007-2008 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #ifdef XNU_KERNEL_PRIVATE 30 31 #ifndef _KERN_AFFINITY_H_ 32 #define _KERN_AFFINITY_H_ 33 34 #ifdef MACH_KERNEL_PRIVATE 35 36 #include <kern/queue.h> 37 #include <kern/processor.h> 38 39 /* 40 * An affinity set object represents a set of threads identified by the user 41 * to be sharing (cache) affinity. A task may have multiple affinity sets 42 * defined. Each set has dis-affinity other sets. Tasks related by inheritance 43 * may share the same affinity set namespace. 44 * Affinity sets are used to advise (hint) thread placement. 45 */ 46 struct affinity_set { 47 struct affinity_space *aset_space; /* namespace */ 48 queue_chain_t aset_affinities; /* links affinities in group */ 49 queue_head_t aset_threads; /* threads in affinity set */ 50 uint32_t aset_thread_count; /* num threads in set */ 51 uint32_t aset_tag; /* user-assigned tag */ 52 uint32_t aset_num; /* kernel-assigned affinity */ 53 processor_set_t aset_pset; /* processor set */ 54 }; 55 56 extern boolean_t thread_affinity_is_supported(void); 57 extern void thread_affinity_dup(thread_t parent, thread_t child); 58 extern void thread_affinity_terminate(thread_t thread); 59 extern void task_affinity_create( 60 task_t, 61 task_t); 62 extern void task_affinity_deallocate( 63 task_t); 64 extern kern_return_t task_affinity_info( 65 task_t, 66 task_info_t, 67 mach_msg_type_number_t *); 68 69 #endif /* MACH_KERNEL_PRIVATE */ 70 71 extern kern_return_t thread_affinity_set(thread_t thread, uint32_t tag); 72 extern uint32_t thread_affinity_get(thread_t thread); 73 extern void thread_affinity_exec(thread_t thread); 74 75 #endif /* _KERN_AFFINITY_H_ */ 76 77 #endif /* XNU_KERNEL_PRIVATE */ 78