1*42e22086SApple OSS Distributions /* 2*42e22086SApple OSS Distributions * Copyright (c) 2011-2018 Apple Computer, Inc. All rights reserved. 3*42e22086SApple OSS Distributions * 4*42e22086SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*42e22086SApple OSS Distributions * 6*42e22086SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*42e22086SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*42e22086SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*42e22086SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*42e22086SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*42e22086SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*42e22086SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*42e22086SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*42e22086SApple OSS Distributions * 15*42e22086SApple OSS Distributions * Please obtain a copy of the License at 16*42e22086SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*42e22086SApple OSS Distributions * 18*42e22086SApple OSS Distributions * The Original Code and all software distributed under the License are 19*42e22086SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*42e22086SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*42e22086SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*42e22086SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*42e22086SApple OSS Distributions * Please see the License for the specific language governing rights and 24*42e22086SApple OSS Distributions * limitations under the License. 25*42e22086SApple OSS Distributions * 26*42e22086SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*42e22086SApple OSS Distributions */ 28*42e22086SApple OSS Distributions 29*42e22086SApple OSS Distributions #include <kern/thread.h> 30*42e22086SApple OSS Distributions #include <stdbool.h> 31*42e22086SApple OSS Distributions 32*42e22086SApple OSS Distributions #define KPERF_PET_DEFAULT_IDLE_RATE 15 33*42e22086SApple OSS Distributions 34*42e22086SApple OSS Distributions extern bool kppet_lightweight_active; 35*42e22086SApple OSS Distributions extern _Atomic uint32_t kppet_gencount; 36*42e22086SApple OSS Distributions 37*42e22086SApple OSS Distributions /* 38*42e22086SApple OSS Distributions * If `actionid` is non-zero, set up PET to sample the action. Otherwise, 39*42e22086SApple OSS Distributions * disable PET. 40*42e22086SApple OSS Distributions */ 41*42e22086SApple OSS Distributions void kppet_config(unsigned int actionid); 42*42e22086SApple OSS Distributions 43*42e22086SApple OSS Distributions /* 44*42e22086SApple OSS Distributions * Reset PET back to its default settings. 45*42e22086SApple OSS Distributions */ 46*42e22086SApple OSS Distributions void kppet_reset(void); 47*42e22086SApple OSS Distributions 48*42e22086SApple OSS Distributions /* 49*42e22086SApple OSS Distributions * Notify PET that new threads are switching on-CPU. 50*42e22086SApple OSS Distributions */ 51*42e22086SApple OSS Distributions void kppet_on_cpu(thread_t thread, thread_continue_t continuation, 52*42e22086SApple OSS Distributions uintptr_t *starting_frame); 53*42e22086SApple OSS Distributions 54*42e22086SApple OSS Distributions /* 55*42e22086SApple OSS Distributions * Wake the PET thread from its timer handler. 56*42e22086SApple OSS Distributions */ 57*42e22086SApple OSS Distributions void kppet_wake_thread(void); 58*42e22086SApple OSS Distributions 59*42e22086SApple OSS Distributions /* 60*42e22086SApple OSS Distributions * For configuring PET from the sysctl interface. 61*42e22086SApple OSS Distributions */ 62*42e22086SApple OSS Distributions int kppet_get_idle_rate(void); 63*42e22086SApple OSS Distributions int kppet_set_idle_rate(int new_idle_rate); 64*42e22086SApple OSS Distributions int kppet_get_lightweight_pet(void); 65*42e22086SApple OSS Distributions int kppet_set_lightweight_pet(int on); 66*42e22086SApple OSS Distributions 67*42e22086SApple OSS Distributions /* 68*42e22086SApple OSS Distributions * Update whether lightweight PET is active when turning sampling on and off. 69*42e22086SApple OSS Distributions */ 70*42e22086SApple OSS Distributions void kppet_lightweight_active_update(void); 71