| 1 | /* $Id: tstDarwinSched.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT testcase - darwin scheduling.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include <mach/thread_act.h>
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| 42 | #include <mach/thread_policy.h>
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| 43 | #include <mach/thread_info.h>
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| 44 | #include <mach/host_info.h>
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| 45 | #include <mach/mach_init.h>
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| 46 | #include <mach/mach_host.h>
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| 47 | #include <pthread.h>
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| 48 | #include <sched.h>
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| 49 | #include <stdio.h>
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| 50 | #include <stdlib.h>
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| 51 | #include <string.h>
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| 52 |
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| 53 |
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| 54 | static void thread_print_policies(int fDefault)
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| 55 | {
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| 56 | thread_extended_policy_data_t Extended = { 0 };
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| 57 | thread_time_constraint_policy_data_t TimeConstraint = { 0, 0, 0, 1 };
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| 58 | thread_precedence_policy_data_t Precedence = { 0 };
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| 59 | #ifdef THREAD_AFFINITY_POLICY /* 10.5 */
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| 60 | thread_affinity_policy_data_t Affinity = { 0 };
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| 61 | #endif
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| 62 | boolean_t GetDefault;
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| 63 | mach_msg_type_number_t Count;
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| 64 | kern_return_t krc;
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| 65 |
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| 66 | GetDefault = fDefault;
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| 67 | Count = THREAD_EXTENDED_POLICY_COUNT;
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| 68 | krc = thread_policy_get(mach_thread_self(), THREAD_EXTENDED_POLICY, (thread_policy_t)&Extended, &Count, &GetDefault);
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| 69 | printf("THREAD_EXTENDED_POLICY: krc=%#x default=%d timeshare=%d (%#x)\n",
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| 70 | krc, GetDefault, Extended.timeshare, Extended.timeshare);
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| 71 |
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| 72 | GetDefault = fDefault;
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| 73 | Count = THREAD_PRECEDENCE_POLICY_COUNT;
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| 74 | krc = thread_policy_get(mach_thread_self(), THREAD_PRECEDENCE_POLICY, (thread_policy_t)&Precedence, &Count, &GetDefault);
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| 75 | printf("THREAD_PRECEDENCE_POLICY: krc=%#x default=%d importance=%d (%#x)\n",
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| 76 | krc, GetDefault, Precedence.importance, Precedence.importance);
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| 77 |
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| 78 | GetDefault = fDefault;
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| 79 | Count = THREAD_TIME_CONSTRAINT_POLICY_COUNT;
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| 80 | krc = thread_policy_get(mach_thread_self(), THREAD_TIME_CONSTRAINT_POLICY, (thread_policy_t)&TimeConstraint, &Count, &GetDefault);
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| 81 | printf("THREAD_TIME_CONSTRAINT_POLICY: krc=%#x default=%d period=%u (%#x) computation=%u (%#x) constraint=%u (%#x) preemptible=%d\n",
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| 82 | krc, GetDefault, TimeConstraint.period, TimeConstraint.period,
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| 83 | TimeConstraint.computation, TimeConstraint.computation,
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| 84 | TimeConstraint.constraint, TimeConstraint.constraint,
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| 85 | TimeConstraint.preemptible);
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| 86 |
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| 87 | #ifdef THREAD_AFFINITY_POLICY /* 10.5 */
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| 88 | GetDefault = fDefault;
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| 89 | Count = THREAD_AFFINITY_POLICY_COUNT;
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| 90 | krc = thread_policy_get(mach_thread_self(), THREAD_AFFINITY_POLICY, (thread_policy_t)&Affinity, &Count, &GetDefault);
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| 91 | printf("THREAD_AFFINITY_POLICY: krc=%#x default=%d affinity_tag=%d (%#x)\n",
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| 92 | krc, GetDefault, Affinity.affinity_tag, Affinity.affinity_tag);
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| 93 | #endif
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| 94 |
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| 95 | if (!fDefault)
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| 96 | {
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| 97 | struct sched_param Param;
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| 98 | int iPolicy = 0;
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| 99 | struct thread_basic_info BasicInfo = {{0,0},{0,0},0,0,0,0,0,0};
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| 100 | struct policy_timeshare_info TSInfo = {0,0,0,0,0};
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| 101 | int rc;
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| 102 |
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| 103 | memset(&Param, 0, sizeof(Param));
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| 104 | rc = pthread_getschedparam(pthread_self(), &iPolicy, &Param);
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| 105 | printf("pthread_getschedparam: rc=%d iPolicy=%d (%#x) sched_priority=%d (%#x) opaque=%d (%#x)\n",
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| 106 | rc, iPolicy, iPolicy, Param.sched_priority, Param.sched_priority,
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| 107 | #ifdef THREAD_AFFINITY_POLICY /* 10.5 */
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| 108 | *(int *)&Param.__opaque, *(int *)&Param.__opaque);
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| 109 | #else
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| 110 | *(int *)&Param.opaque, *(int *)&Param.opaque);
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| 111 | #endif
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| 112 |
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| 113 | Count = THREAD_BASIC_INFO_COUNT;
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| 114 | krc = thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)&BasicInfo, &Count);
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| 115 | printf("THREAD_BASIC_INFO: krc=%#x user_time=%d.%06d system_time=%d.%06d cpu_usage=%d policy=%d\n"
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| 116 | " run_state=%d flags=%#x suspend_count=%d sleep_time=%d\n",
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| 117 | krc,
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| 118 | BasicInfo.user_time.seconds, BasicInfo.user_time.microseconds,
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| 119 | BasicInfo.system_time.seconds, BasicInfo.system_time.microseconds,
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| 120 | BasicInfo.cpu_usage,
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| 121 | BasicInfo.policy,
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| 122 | BasicInfo.run_state,
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| 123 | BasicInfo.flags,
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| 124 | BasicInfo.suspend_count,
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| 125 | BasicInfo.sleep_time);
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| 126 |
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| 127 | Count = POLICY_TIMESHARE_INFO_COUNT;
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| 128 | krc = thread_info(mach_thread_self(), THREAD_SCHED_TIMESHARE_INFO, (thread_info_t)&TSInfo, &Count);
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| 129 | printf("THREAD_SCHED_TIMESHARE_INFO: krc=%#x max_priority=%d (%#x) base_priority=%d (%#x) cur_priority=%d (%#x)\n"
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| 130 | " depressed=%d depress_priority=%d (%#x)\n",
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| 131 | krc,
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| 132 | TSInfo.max_priority, TSInfo.max_priority,
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| 133 | TSInfo.base_priority, TSInfo.base_priority,
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| 134 | TSInfo.cur_priority, TSInfo.cur_priority,
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| 135 | TSInfo.depressed,
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| 136 | TSInfo.depress_priority, TSInfo.depress_priority);
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| 137 | }
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| 138 | else
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| 139 | {
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| 140 | host_priority_info_data_t PriorityInfo = {0,0,0,0,0,0,0,0};
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| 141 |
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| 142 | Count = HOST_PRIORITY_INFO_COUNT;
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| 143 | krc = host_info(mach_host_self(), HOST_PRIORITY_INFO, (host_info_t)&PriorityInfo, &Count);
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| 144 | printf("HOST_PRIORITY_INFO: krc=%#x \n"
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| 145 | " kernel_priority=%2d (%#x)\n"
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| 146 | " system_priority=%2d (%#x)\n"
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| 147 | " server_priority=%2d (%#x)\n"
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| 148 | " user_priority=%2d (%#x)\n"
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| 149 | " depress_priority=%2d (%#x)\n"
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| 150 | " idle_priority=%2d (%#x)\n"
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| 151 | " minimum_priority=%2d (%#x)\n"
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| 152 | " maximum_priority=%2d (%#x)\n",
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| 153 | krc,
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| 154 | PriorityInfo.kernel_priority, PriorityInfo.kernel_priority,
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| 155 | PriorityInfo.system_priority, PriorityInfo.system_priority,
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| 156 | PriorityInfo.server_priority, PriorityInfo.server_priority,
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| 157 | PriorityInfo.user_priority, PriorityInfo.user_priority,
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| 158 | PriorityInfo.depress_priority, PriorityInfo.depress_priority,
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| 159 | PriorityInfo.idle_priority, PriorityInfo.idle_priority,
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| 160 | PriorityInfo.minimum_priority, PriorityInfo.minimum_priority,
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| 161 | PriorityInfo.maximum_priority, PriorityInfo.maximum_priority);
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| 162 | }
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| 163 | }
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| 164 |
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| 165 | int main()
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| 166 | {
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| 167 | struct sched_param Param;
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| 168 | int iPolicy;
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| 169 | int iPriority;
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| 170 | int rc;
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| 171 |
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| 172 | printf("tstDarwinSched: Default policies:\n");
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| 173 | thread_print_policies(1);
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| 174 |
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| 175 | printf("tstDarwinSched: Current policies:\n");
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| 176 | thread_print_policies(0);
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| 177 |
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| 178 |
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| 179 | printf("tstDarwinSched:\n");
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| 180 | printf("tstDarwinSched: Trying max priority using pthread API\n");
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| 181 | iPolicy = SCHED_OTHER;
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| 182 | memset(&Param, 0, sizeof(Param));
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| 183 | pthread_getschedparam(pthread_self(), &iPolicy, &Param);
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| 184 | Param.sched_priority = iPriority = sched_get_priority_max(iPolicy);
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| 185 | rc = pthread_setschedparam(pthread_self(), iPolicy, &Param);
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| 186 | if (!rc)
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| 187 | {
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| 188 | do
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| 189 | {
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| 190 | Param.sched_priority = ++iPriority;
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| 191 | rc = pthread_setschedparam(pthread_self(), iPolicy, &Param);
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| 192 | } while (!rc);
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| 193 | iPriority--;
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| 194 | rc = 0;
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| 195 | }
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| 196 | printf("tstDarwinSched: pthread_setschedparam(iPriority=%d [max=%d]) -> %d\n",
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| 197 | iPriority, sched_get_priority_max(iPolicy), rc);
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| 198 | thread_print_policies(0);
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| 199 |
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| 200 |
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| 201 | printf("tstDarwinSched:\n");
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| 202 | printf("tstDarwinSched: Trying min priority using pthread API\n");
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| 203 | iPolicy = SCHED_OTHER;
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| 204 | memset(&Param, 0, sizeof(Param));
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| 205 | pthread_getschedparam(pthread_self(), &iPolicy, &Param);
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| 206 | Param.sched_priority = iPriority = sched_get_priority_min(iPolicy);
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| 207 | rc = pthread_setschedparam(pthread_self(), iPolicy, &Param);
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| 208 | if (!rc)
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| 209 | {
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| 210 | do
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| 211 | {
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| 212 | Param.sched_priority = --iPriority;
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| 213 | rc = pthread_setschedparam(pthread_self(), iPolicy, &Param);
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| 214 | } while (!rc);
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| 215 | iPriority++;
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| 216 | rc = 0;
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| 217 | }
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| 218 | printf("tstDarwinSched: pthread_setschedparam(iPriority=%d [min=%d]) -> %d\n",
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| 219 | iPriority, sched_get_priority_min(iPolicy), rc);
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| 220 | thread_print_policies(0);
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| 221 |
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| 222 |
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| 223 | return 0;
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| 224 | }
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| 225 |
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