/* * Copyright (c) 2011 Apple Computer, 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@ */ #include <kern/thread.h> #define KPERF_PET_DEFAULT_IDLE_RATE (15) extern boolean_t kperf_lightweight_pet_active; extern uint32_t kperf_pet_gen; /* prepare PET to be able to fire action with given ID, or disable PET */ void kperf_pet_config(unsigned int action_id); /* fire off a PET sample, both before and after on-core samples */ void kperf_pet_fire_before(void); void kperf_pet_fire_after(void); /* notify PET of new threads switching on */ void kperf_pet_on_cpu(thread_t thread, thread_continue_t continuation, uintptr_t *starting_frame); /* get/set rate at which idle threads are sampled by PET */ int kperf_get_pet_idle_rate(void); int kperf_set_pet_idle_rate(int val); /* get/set whether lightweight PET is enabled */ int kperf_get_lightweight_pet(void); int kperf_set_lightweight_pet(int val); void kperf_lightweight_pet_active_update(void);