/* * Copyright (c) 2011-2018 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> #include <stdbool.h> #define KPERF_PET_DEFAULT_IDLE_RATE 15 extern bool kppet_lightweight_active; extern _Atomic uint32_t kppet_gencount; /* * If `actionid` is non-zero, set up PET to sample the action. Otherwise, * disable PET. */ void kppet_config(unsigned int actionid); /* * Reset PET back to its default settings. */ void kppet_reset(void); /* * Notify PET that new threads are switching on-CPU. */ void kppet_on_cpu(thread_t thread, thread_continue_t continuation, uintptr_t *starting_frame); /* * Wake the PET thread from its timer handler. */ void kppet_wake_thread(void); /* * For configuring PET from the sysctl interface. */ int kppet_get_idle_rate(void); int kppet_set_idle_rate(int new_idle_rate); int kppet_get_lightweight_pet(void); int kppet_set_lightweight_pet(int on); /* * Update whether lightweight PET is active when turning sampling on and off. */ void kppet_lightweight_active_update(void);