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/* $Id: mp-darwin.cpp $ */
/** @file
* IPRT - Multiprocessor, Darwin.
*/
/*
* Copyright (C) 2006-2020 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 *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_SYSTEM
#include <iprt/types.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/sysctl.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
#include <errno.h>
#include <mach/mach.h>
#include <iprt/mp.h>
#include <iprt/cpuset.h>
#include <iprt/assert.h>
#include <iprt/string.h>
/**
* Internal worker that determines the max possible logical CPU count (hyperthreads).
*
* @returns Max cpus.
*/
static RTCPUID rtMpDarwinMaxLogicalCpus(void)
{
int cCpus = -1;
size_t cb = sizeof(cCpus);
int rc = sysctlbyname("hw.logicalcpu_max", &cCpus, &cb, NULL, 0);
if (rc != -1 && cCpus >= 1)
return cCpus;
AssertFailed();
return 1;
}
/**
* Internal worker that determines the max possible physical core count.
*
* @returns Max cpus.
*/
static RTCPUID rtMpDarwinMaxPhysicalCpus(void)
{
int cCpus = -1;
size_t cb = sizeof(cCpus);
int rc = sysctlbyname("hw.physicalcpu_max", &cCpus, &cb, NULL, 0);
if (rc != -1 && cCpus >= 1)
return cCpus;
AssertFailed();
return 1;
}
#if 0 /* unused */
/**
* Internal worker that determines the current number of logical CPUs (hyperthreads).
*
* @returns Max cpus.
*/
static RTCPUID rtMpDarwinOnlineLogicalCpus(void)
{
int cCpus = -1;
size_t cb = sizeof(cCpus);
int rc = sysctlbyname("hw.logicalcpu", &cCpus, &cb, NULL, 0);
if (rc != -1 && cCpus >= 1)
return cCpus;
AssertFailed();
return 1;
}
#endif /* unused */
/**
* Internal worker that determines the current number of physical CPUs.
*
* @returns Max cpus.
*/
static RTCPUID rtMpDarwinOnlinePhysicalCpus(void)
{
int cCpus = -1;
size_t cb = sizeof(cCpus);
int rc = sysctlbyname("hw.physicalcpu", &cCpus, &cb, NULL, 0);
if (rc != -1 && cCpus >= 1)
return cCpus;
AssertFailed();
return 1;
}
/** @todo RTmpCpuId(). */
RTDECL(int) RTMpCpuIdToSetIndex(RTCPUID idCpu)
{
return idCpu < RTCPUSET_MAX_CPUS && idCpu < rtMpDarwinMaxLogicalCpus() ? idCpu : -1;
}
RTDECL(RTCPUID) RTMpCpuIdFromSetIndex(int iCpu)
{
return (unsigned)iCpu < rtMpDarwinMaxLogicalCpus() ? iCpu : NIL_RTCPUID;
}
RTDECL(RTCPUID) RTMpGetMaxCpuId(void)
{
return rtMpDarwinMaxLogicalCpus() - 1;
}
RTDECL(bool) RTMpIsCpuOnline(RTCPUID idCpu)
{
#if 0
return RTMpIsCpuPossible(idCpu);
#else
/** @todo proper ring-3 support on darwin, see @bugref{3014}. */
natural_t nCpus;
processor_basic_info_t pinfo;
mach_msg_type_number_t count;
kern_return_t krc = host_processor_info(mach_host_self(),
PROCESSOR_BASIC_INFO, &nCpus, (processor_info_array_t*)&pinfo, &count);
AssertReturn (krc == KERN_SUCCESS, true);
bool isOnline = idCpu < nCpus ? pinfo[idCpu].running : false;
vm_deallocate(mach_task_self(), (vm_address_t)pinfo, count * sizeof(*pinfo));
return isOnline;
#endif
}
RTDECL(bool) RTMpIsCpuPossible(RTCPUID idCpu)
{
return idCpu != NIL_RTCPUID
&& idCpu < rtMpDarwinMaxLogicalCpus();
}
RTDECL(PRTCPUSET) RTMpGetSet(PRTCPUSET pSet)
{
#if 0
RTCPUID cCpus = rtMpDarwinMaxLogicalCpus();
return RTCpuSetFromU64(RT_BIT_64(cCpus) - 1);
#else
RTCpuSetEmpty(pSet);
RTCPUID cMax = rtMpDarwinMaxLogicalCpus();
for (RTCPUID idCpu = 0; idCpu < cMax; idCpu++)
if (RTMpIsCpuPossible(idCpu))
RTCpuSetAdd(pSet, idCpu);
return pSet;
#endif
}
RTDECL(RTCPUID) RTMpGetCount(void)
{
return rtMpDarwinMaxLogicalCpus();
}
RTDECL(RTCPUID) RTMpGetCoreCount(void)
{
return rtMpDarwinMaxPhysicalCpus();
}
RTDECL(PRTCPUSET) RTMpGetOnlineSet(PRTCPUSET pSet)
{
#if 0
return RTMpGetSet(pSet);
#else
RTCpuSetEmpty(pSet);
RTCPUID cMax = rtMpDarwinMaxLogicalCpus();
for (RTCPUID idCpu = 0; idCpu < cMax; idCpu++)
if (RTMpIsCpuOnline(idCpu))
RTCpuSetAdd(pSet, idCpu);
return pSet;
#endif
}
RTDECL(RTCPUID) RTMpGetOnlineCount(void)
{
RTCPUSET Set;
RTMpGetOnlineSet(&Set);
return RTCpuSetCount(&Set);
}
RTDECL(RTCPUID) RTMpGetOnlineCoreCount(void)
{
return rtMpDarwinOnlinePhysicalCpus();
}
RTDECL(uint32_t) RTMpGetCurFrequency(RTCPUID idCpu)
{
/** @todo figure out how to get the current cpu speed on darwin. Have to check what powermanagement does. */
NOREF(idCpu);
return 0;
}
RTDECL(uint32_t) RTMpGetMaxFrequency(RTCPUID idCpu)
{
if (!RTMpIsCpuOnline(idCpu))
return 0;
/*
* Try the 'hw.cpufrequency_max' one.
*/
uint64_t CpuFrequencyMax = 0;
size_t cb = sizeof(CpuFrequencyMax);
int rc = sysctlbyname("hw.cpufrequency_max", &CpuFrequencyMax, &cb, NULL, 0);
if (!rc)
return (CpuFrequencyMax + 999999) / 1000000;
/*
* Use the deprecated one.
*/
int aiMib[2];
aiMib[0] = CTL_HW;
aiMib[1] = HW_CPU_FREQ;
int cCpus = -1;
cb = sizeof(cCpus);
rc = sysctl(aiMib, RT_ELEMENTS(aiMib), &cCpus, &cb, NULL, 0);
if (rc != -1 && cCpus >= 1)
return cCpus;
AssertFailed();
return 0;
}
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