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); |
56 | |