/* $Id: tstDarwinSched.cpp $ */ /** @file * IPRT testcase - darwin scheduling. */ /* * Copyright (C) 2009-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include static void thread_print_policies(int fDefault) { thread_extended_policy_data_t Extended = { 0 }; thread_time_constraint_policy_data_t TimeConstraint = { 0, 0, 0, 1 }; thread_precedence_policy_data_t Precedence = { 0 }; #ifdef THREAD_AFFINITY_POLICY /* 10.5 */ thread_affinity_policy_data_t Affinity = { 0 }; #endif boolean_t GetDefault; mach_msg_type_number_t Count; kern_return_t krc; GetDefault = fDefault; Count = THREAD_EXTENDED_POLICY_COUNT; krc = thread_policy_get(mach_thread_self(), THREAD_EXTENDED_POLICY, (thread_policy_t)&Extended, &Count, &GetDefault); printf("THREAD_EXTENDED_POLICY: krc=%#x default=%d timeshare=%d (%#x)\n", krc, GetDefault, Extended.timeshare, Extended.timeshare); GetDefault = fDefault; Count = THREAD_PRECEDENCE_POLICY_COUNT; krc = thread_policy_get(mach_thread_self(), THREAD_PRECEDENCE_POLICY, (thread_policy_t)&Precedence, &Count, &GetDefault); printf("THREAD_PRECEDENCE_POLICY: krc=%#x default=%d importance=%d (%#x)\n", krc, GetDefault, Precedence.importance, Precedence.importance); GetDefault = fDefault; Count = THREAD_TIME_CONSTRAINT_POLICY_COUNT; krc = thread_policy_get(mach_thread_self(), THREAD_TIME_CONSTRAINT_POLICY, (thread_policy_t)&TimeConstraint, &Count, &GetDefault); printf("THREAD_TIME_CONSTRAINT_POLICY: krc=%#x default=%d period=%u (%#x) computation=%u (%#x) constraint=%u (%#x) preemptible=%d\n", krc, GetDefault, TimeConstraint.period, TimeConstraint.period, TimeConstraint.computation, TimeConstraint.computation, TimeConstraint.constraint, TimeConstraint.constraint, TimeConstraint.preemptible); #ifdef THREAD_AFFINITY_POLICY /* 10.5 */ GetDefault = fDefault; Count = THREAD_AFFINITY_POLICY_COUNT; krc = thread_policy_get(mach_thread_self(), THREAD_AFFINITY_POLICY, (thread_policy_t)&Affinity, &Count, &GetDefault); printf("THREAD_AFFINITY_POLICY: krc=%#x default=%d affinity_tag=%d (%#x)\n", krc, GetDefault, Affinity.affinity_tag, Affinity.affinity_tag); #endif if (!fDefault) { struct sched_param Param; int iPolicy = 0; struct thread_basic_info BasicInfo = {{0,0},{0,0},0,0,0,0,0,0}; struct policy_timeshare_info TSInfo = {0,0,0,0,0}; int rc; memset(&Param, 0, sizeof(Param)); rc = pthread_getschedparam(pthread_self(), &iPolicy, &Param); printf("pthread_getschedparam: rc=%d iPolicy=%d (%#x) sched_priority=%d (%#x) opaque=%d (%#x)\n", rc, iPolicy, iPolicy, Param.sched_priority, Param.sched_priority, #ifdef THREAD_AFFINITY_POLICY /* 10.5 */ *(int *)&Param.__opaque, *(int *)&Param.__opaque); #else *(int *)&Param.opaque, *(int *)&Param.opaque); #endif Count = THREAD_BASIC_INFO_COUNT; krc = thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)&BasicInfo, &Count); printf("THREAD_BASIC_INFO: krc=%#x user_time=%d.%06d system_time=%d.%06d cpu_usage=%d policy=%d\n" " run_state=%d flags=%#x suspend_count=%d sleep_time=%d\n", krc, BasicInfo.user_time.seconds, BasicInfo.user_time.microseconds, BasicInfo.system_time.seconds, BasicInfo.system_time.microseconds, BasicInfo.cpu_usage, BasicInfo.policy, BasicInfo.run_state, BasicInfo.flags, BasicInfo.suspend_count, BasicInfo.sleep_time); Count = POLICY_TIMESHARE_INFO_COUNT; krc = thread_info(mach_thread_self(), THREAD_SCHED_TIMESHARE_INFO, (thread_info_t)&TSInfo, &Count); printf("THREAD_SCHED_TIMESHARE_INFO: krc=%#x max_priority=%d (%#x) base_priority=%d (%#x) cur_priority=%d (%#x)\n" " depressed=%d depress_priority=%d (%#x)\n", krc, TSInfo.max_priority, TSInfo.max_priority, TSInfo.base_priority, TSInfo.base_priority, TSInfo.cur_priority, TSInfo.cur_priority, TSInfo.depressed, TSInfo.depress_priority, TSInfo.depress_priority); } else { host_priority_info_data_t PriorityInfo = {0,0,0,0,0,0,0,0}; Count = HOST_PRIORITY_INFO_COUNT; krc = host_info(mach_host_self(), HOST_PRIORITY_INFO, (host_info_t)&PriorityInfo, &Count); printf("HOST_PRIORITY_INFO: krc=%#x \n" " kernel_priority=%2d (%#x)\n" " system_priority=%2d (%#x)\n" " server_priority=%2d (%#x)\n" " user_priority=%2d (%#x)\n" " depress_priority=%2d (%#x)\n" " idle_priority=%2d (%#x)\n" " minimum_priority=%2d (%#x)\n" " maximum_priority=%2d (%#x)\n", krc, PriorityInfo.kernel_priority, PriorityInfo.kernel_priority, PriorityInfo.system_priority, PriorityInfo.system_priority, PriorityInfo.server_priority, PriorityInfo.server_priority, PriorityInfo.user_priority, PriorityInfo.user_priority, PriorityInfo.depress_priority, PriorityInfo.depress_priority, PriorityInfo.idle_priority, PriorityInfo.idle_priority, PriorityInfo.minimum_priority, PriorityInfo.minimum_priority, PriorityInfo.maximum_priority, PriorityInfo.maximum_priority); } } int main() { struct sched_param Param; int iPolicy; int iPriority; int rc; printf("tstDarwinSched: Default policies:\n"); thread_print_policies(1); printf("tstDarwinSched: Current policies:\n"); thread_print_policies(0); printf("tstDarwinSched:\n"); printf("tstDarwinSched: Trying max priority using pthread API\n"); iPolicy = SCHED_OTHER; memset(&Param, 0, sizeof(Param)); pthread_getschedparam(pthread_self(), &iPolicy, &Param); Param.sched_priority = iPriority = sched_get_priority_max(iPolicy); rc = pthread_setschedparam(pthread_self(), iPolicy, &Param); if (!rc) { do { Param.sched_priority = ++iPriority; rc = pthread_setschedparam(pthread_self(), iPolicy, &Param); } while (!rc); iPriority--; rc = 0; } printf("tstDarwinSched: pthread_setschedparam(iPriority=%d [max=%d]) -> %d\n", iPriority, sched_get_priority_max(iPolicy), rc); thread_print_policies(0); printf("tstDarwinSched:\n"); printf("tstDarwinSched: Trying min priority using pthread API\n"); iPolicy = SCHED_OTHER; memset(&Param, 0, sizeof(Param)); pthread_getschedparam(pthread_self(), &iPolicy, &Param); Param.sched_priority = iPriority = sched_get_priority_min(iPolicy); rc = pthread_setschedparam(pthread_self(), iPolicy, &Param); if (!rc) { do { Param.sched_priority = --iPriority; rc = pthread_setschedparam(pthread_self(), iPolicy, &Param); } while (!rc); iPriority++; rc = 0; } printf("tstDarwinSched: pthread_setschedparam(iPriority=%d [min=%d]) -> %d\n", iPriority, sched_get_priority_min(iPolicy), rc); thread_print_policies(0); return 0; }