| | 1 | /* |
| | 2 | * Copyright (c) 2011 Apple Computer, 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 | #include <kern/thread.h> |
| | 30 | |
| | 31 | #define KPERF_PET_DEFAULT_IDLE_RATE (15) |
| | 32 | |
| | 33 | extern boolean_t kperf_lightweight_pet_active; |
| | 34 | extern uint32_t kperf_pet_gen; |
| | 35 | |
| | 36 | /* prepare PET to be able to fire action with given ID, or disable PET */ |
| | 37 | void kperf_pet_config(unsigned int action_id); |
| | 38 | |
| | 39 | /* fire off a PET sample, both before and after on-core samples */ |
| | 40 | void kperf_pet_fire_before(void); |
| | 41 | void kperf_pet_fire_after(void); |
| | 42 | |
| | 43 | /* notify PET of new threads switching on */ |
| | 44 | void kperf_pet_on_cpu(thread_t thread, thread_continue_t continuation, |
| | 45 | uintptr_t *starting_frame); |
| | 46 | |
| | 47 | /* get/set rate at which idle threads are sampled by PET */ |
| | 48 | int kperf_get_pet_idle_rate(void); |
| | 49 | int kperf_set_pet_idle_rate(int val); |
| | 50 | |
| | 51 | /* get/set whether lightweight PET is enabled */ |
| | 52 | int kperf_get_lightweight_pet(void); |
| | 53 | int kperf_set_lightweight_pet(int val); |
| | 54 | |
| | 55 | void kperf_lightweight_pet_active_update(void); |
projects / apple / xnu.git / blame_incremental