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/* $Id: tstDarwinSched.cpp $ */
/** @file
* IPRT testcase - darwin scheduling.
*/
/*
* Copyright (C) 2009-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <mach/thread_act.h>
#include <mach/thread_policy.h>
#include <mach/thread_info.h>
#include <mach/host_info.h>
#include <mach/mach_init.h>
#include <mach/mach_host.h>
#include <pthread.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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;
}
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