1018 lines
42 KiB
C++
1018 lines
42 KiB
C++
//-------------------------------------------------------------------------------------
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// CpuTopology.cpp
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//
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// CpuToplogy class implementation.
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-------------------------------------------------------------------------------------
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#include "pch_tier0.h"
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#if defined(_WIN32) && !defined(_X360) && !defined( _PS3 )
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#include "cputopology.h"
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#include <stdlib.h>
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#include <crtdbg.h>
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#undef malloc
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#undef free
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#ifdef _WIN64
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// Inline assembly is not supported in 64-bit. Ideally, we would prefer to
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// use the __cpuid intrinsic to avoid having to drop to assembly altogether.
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// However, as of MSVC 9.0, the __cpuid intrinsic does not enable the
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// ability to set the ECX register, which is required for obtaining certain
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// extended CPU information. To overcome these issues, we must call the
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// Cpuid64() external function, which is written in assembly and located in
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// the cpuid64.asm file included in this project. This project contains a build
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// step that invokes 64-bit MASM on cpuid64.asm when building a 64-bit target.
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extern "C" void Cpuid64(void* argsPtr);
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#endif
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//---------------------------------------------------------------------------------
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// Name: ICpuToplogy
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// Desc: Specifies the interface that each class that provides an implementation
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// for extracting cpu topology must conform to. This is the Implementor
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// class in the traditional Bridge Pattern.
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//---------------------------------------------------------------------------------
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class ICpuTopology
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{
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public:
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virtual ~ICpuTopology()
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{
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}
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virtual BOOL IsDefaultImpl() const = 0;
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virtual DWORD NumberOfProcessCores() const = 0;
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virtual DWORD NumberOfSystemCores() const = 0;
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virtual DWORD_PTR CoreAffinityMask( DWORD coreIdx ) const = 0;
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};
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namespace
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{
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///////////////////////////////////////////////////////////////////////////////////
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// Local Class Definitions
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///////////////////////////////////////////////////////////////////////////////////
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//---------------------------------------------------------------------------------
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// Name: DefaultImpl
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// Desc: Provides a default implementation for the ICpuTopology interface when
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// GetLogicalProcessorInformation and CPUID are not supported for whatever
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// reason. This is a ConcreteImplementor class in the traditional Bridge
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// Pattern.
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//---------------------------------------------------------------------------------
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class DefaultImpl : public ICpuTopology
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{
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public:
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//-----------------------------------------------------------------------------
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// DefaultImpl::IsDefaultImpl
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//-----------------------------------------------------------------------------
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/*virtual*/ BOOL IsDefaultImpl() const
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{
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return TRUE;
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}
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//-----------------------------------------------------------------------------
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// DefaultImpl::NumberOfProcessCores
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//-----------------------------------------------------------------------------
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/*virtual*/ DWORD NumberOfProcessCores() const
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{
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return 1;
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}
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//-----------------------------------------------------------------------------
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// DefaultImpl::IsNumberOfSystemCores
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//-----------------------------------------------------------------------------
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/*virtual*/ DWORD NumberOfSystemCores() const
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{
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return 1;
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}
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//-----------------------------------------------------------------------------
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// DefaultImpl::CoreAffinityMask
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//-----------------------------------------------------------------------------
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/*virtual*/ DWORD_PTR CoreAffinityMask( DWORD coreIdx ) const
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{
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DWORD_PTR coreAffinity = 0;
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if( 1 == coreIdx )
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{
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DWORD_PTR dwSystemAffinity;
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GetProcessAffinityMask( GetCurrentProcess(), &coreAffinity, &dwSystemAffinity );
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}
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return coreAffinity;
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}
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};
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//---------------------------------------------------------------------------------
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// Name: GlpiImpl
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// Desc: Provides the GetLogicalProcessorInformation implementation for the
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// ICpuTopology interface. This is a ConcreteImplementor class in the
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// traditional Bridge Pattern.
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//---------------------------------------------------------------------------------
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class GlpiImpl : public ICpuTopology
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{
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public:
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//-----------------------------------------------------------------------------
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// Name: GlpiImpl::GlpiImpl
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// Desc: Initializes the internal structures/data with information retrieved
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// from a call to GetLogicalProcessorInformation.
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//-----------------------------------------------------------------------------
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GlpiImpl() : m_pSlpi( NULL ),
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m_nItems( 0 )
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{
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_ASSERT( IsSupported() );
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GlpiFnPtr pGlpi = GetGlpiFn_();
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_ASSERT( pGlpi );
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DWORD cbBuffer = 0;
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pGlpi( 0, &cbBuffer );
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m_pSlpi = ( SYSTEM_LOGICAL_PROCESSOR_INFORMATION* )malloc( cbBuffer );
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pGlpi( m_pSlpi, &cbBuffer );
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m_nItems = cbBuffer / sizeof( SYSTEM_LOGICAL_PROCESSOR_INFORMATION );
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}
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//-----------------------------------------------------------------------------
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// Name: GlpiImpl::~GlpiImpl
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//-----------------------------------------------------------------------------
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/*virtual*/ ~GlpiImpl()
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{
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free( m_pSlpi );
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m_pSlpi = 0;
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m_nItems = 0;
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}
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//-----------------------------------------------------------------------------
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// Name: GlpiImpl::IsDefaultImpl
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//-----------------------------------------------------------------------------
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/*virtual*/ BOOL IsDefaultImpl() const
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{
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return FALSE;
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}
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//-----------------------------------------------------------------------------
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// Name: GlpiImpl::NumberOfProcessCores
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// Desc: Gets the total number of physical processor cores available to the
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// current process.
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//-----------------------------------------------------------------------------
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/*virtual*/ DWORD NumberOfProcessCores() const
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{
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DWORD_PTR dwProcessAffinity, dwSystemAffinity;
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GetProcessAffinityMask( GetCurrentProcess(), &dwProcessAffinity, &dwSystemAffinity );
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DWORD nCores = 0;
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for( DWORD i = 0; i < m_nItems; ++i )
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{
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if( ( RelationProcessorCore == m_pSlpi[i].Relationship ) &&
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( m_pSlpi[i].ProcessorMask & dwProcessAffinity ) )
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{
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++nCores;
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}
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}
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return nCores;
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}
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//-----------------------------------------------------------------------------
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// Name: GlpiImpl::NumberOfSystemCores
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// Desc: Gets the total number of physical processor cores enabled on the
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// system.
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//-----------------------------------------------------------------------------
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/*virtual*/ DWORD NumberOfSystemCores() const
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{
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DWORD nCores = 0;
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for( DWORD i = 0; i < m_nItems; ++i )
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{
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if( RelationProcessorCore == m_pSlpi[i].Relationship )
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++nCores;
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}
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return nCores;
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}
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//-----------------------------------------------------------------------------
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// Name: GlpiImpl::CoreAffinityMask
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// Desc: Gets an affinity mask that corresponds to the requested processor
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// core.
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//-----------------------------------------------------------------------------
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/*virtual*/ DWORD_PTR CoreAffinityMask( DWORD coreIdx ) const
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{
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DWORD_PTR dwProcessAffinity, dwSystemAffinity;
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GetProcessAffinityMask( GetCurrentProcess(), &dwProcessAffinity, &dwSystemAffinity );
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for( DWORD i = 0; i < m_nItems; ++i )
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{
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if( RelationProcessorCore == m_pSlpi[i].Relationship )
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{
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if( !coreIdx-- )
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{
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return m_pSlpi[i].ProcessorMask & dwProcessAffinity;
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}
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}
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}
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return 0;
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}
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//-----------------------------------------------------------------------------
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// Name: GlpiImpl::IsSupported
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//-----------------------------------------------------------------------------
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static BOOL IsSupported()
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{
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return NULL != GetGlpiFn_();
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}
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private:
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// GetLogicalProcessorInformation function pointer
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typedef BOOL( WINAPI* GlpiFnPtr )(
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SYSTEM_LOGICAL_PROCESSOR_INFORMATION*,
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PDWORD
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);
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//-----------------------------------------------------------------------------
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// Name: GlpiImpl::VerifyGlpiFn_
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// Desc: Gets a pointer to the GetLogicalProcessorInformation function only if
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// it is supported on the current platform.
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// GetLogicalProcessorInformation is supported on Windows Server 2003 and
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// XP64, however there is a bug with the implementation. Therefore, only
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// GetLogicalProcessorInformation on Windows Vista is supported in this
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// sample.
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//-----------------------------------------------------------------------------
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static GlpiFnPtr VerifyGlpiFn_()
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{
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// VerifyVersionInfo function pointer
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typedef BOOL ( WINAPI* VviFnPtr )( LPOSVERSIONINFOEX,
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DWORD,
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DWORDLONG );
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HMODULE hMod = GetModuleHandle( TEXT( "kernel32" ) );
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#ifdef _UNICODE
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VviFnPtr pVvi = (VviFnPtr) GetProcAddress( hMod, "VerifyVersionInfoW" );
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#else
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VviFnPtr pVvi = ( VviFnPtr )GetProcAddress( hMod, "VerifyVersionInfoA" );
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#endif
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GlpiFnPtr pGlpi = NULL;
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if( pVvi )
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{
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// VerSetConditionMask function pointer
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typedef ULONGLONG ( WINAPI* VscmFnPtr )( ULONGLONG,
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DWORD,
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BYTE );
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VscmFnPtr pVscm = ( VscmFnPtr )GetProcAddress( hMod, "VerSetConditionMask" );
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_ASSERT( pVscm );
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// Check for Windows Vista
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OSVERSIONINFOEX osvi = { sizeof( OSVERSIONINFOEX ) };
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osvi.dwMajorVersion = 6;
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osvi.dwMinorVersion = 0;
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osvi.wServicePackMajor = 0;
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osvi.wServicePackMinor = 0;
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ULONGLONG dwlMask = 0;
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dwlMask = pVscm( dwlMask, VER_MAJORVERSION, VER_GREATER_EQUAL );
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dwlMask = pVscm( dwlMask, VER_MINORVERSION, VER_GREATER_EQUAL );
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dwlMask = pVscm( dwlMask, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL );
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dwlMask = pVscm( dwlMask, VER_SERVICEPACKMINOR, VER_GREATER_EQUAL );
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if( pVvi( &osvi, VER_MAJORVERSION
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| VER_MINORVERSION
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| VER_SERVICEPACKMAJOR
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| VER_SERVICEPACKMINOR,
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dwlMask ) )
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{
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pGlpi = ( GlpiFnPtr )GetProcAddress( hMod, "GetLogicalProcessorInformation" );
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_ASSERT( pGlpi );
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}
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}
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return pGlpi;
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}
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//-----------------------------------------------------------------------------
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// Name: GlpiImpl::GetGlpiFn_
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// Desc: Gets a cached pointer to the GetLogicalProcessorInformation function.
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//-----------------------------------------------------------------------------
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static GlpiFnPtr GetGlpiFn_()
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{
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static GlpiFnPtr pGlpi = VerifyGlpiFn_();
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return pGlpi;
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}
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// Private Members
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SYSTEM_LOGICAL_PROCESSOR_INFORMATION* m_pSlpi;
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DWORD m_nItems;
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};
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//---------------------------------------------------------------------------------
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// Name: ApicExtractor
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// Desc: A utility class that provides an interface for decoding a processor
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// APIC ID. An APIC ID is an 8-bit identifier given to each logical
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// processor on system boot and can be retrieved by the CPUID instruction.
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// Each APIC ID is composed of a PACKAGE_ID, CORE_ID and SMT_ID that describe
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// the relationship of a logical processor within the processor topology of
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// the system.
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//---------------------------------------------------------------------------------
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class ApicExtractor
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{
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public:
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//-----------------------------------------------------------------------------
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// Name: ApicExtractor::ApicExtractor
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//-----------------------------------------------------------------------------
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ApicExtractor( DWORD nLogProcsPerPkg = 1, DWORD nCoresPerPkg = 1 )
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{
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SetPackageTopology( nLogProcsPerPkg, nCoresPerPkg );
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}
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//-----------------------------------------------------------------------------
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// Name: ApicExtractor::SmtId
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//-----------------------------------------------------------------------------
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BYTE SmtId( BYTE apicId ) const
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{
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return apicId & m_smtIdMask.mask;
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}
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//-----------------------------------------------------------------------------
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// Name: ApicExtractor::CoreId
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//-----------------------------------------------------------------------------
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BYTE CoreId( BYTE apicId ) const
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{
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return ( apicId & m_coreIdMask.mask ) >> m_smtIdMask.width;
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}
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//-----------------------------------------------------------------------------
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// Name: ApicExtractor::PackageId
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//-----------------------------------------------------------------------------
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BYTE PackageId( BYTE apicId ) const
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{
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return ( apicId & m_pkgIdMask.mask ) >>
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( m_smtIdMask.width + m_coreIdMask.width );
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}
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//-----------------------------------------------------------------------------
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// Name: ApicExtractor::PackageCoreId
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//-----------------------------------------------------------------------------
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BYTE PackageCoreId( BYTE apicId ) const
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{
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return ( apicId & ( m_pkgIdMask.mask | m_coreIdMask.mask ) ) >>
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m_smtIdMask.width;
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}
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//-----------------------------------------------------------------------------
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// Name: ApicExtractor::GetLogProcsPerPkg
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//-----------------------------------------------------------------------------
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DWORD GetLogProcsPerPkg() const
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{
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return m_nLogProcsPerPkg;
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}
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//-----------------------------------------------------------------------------
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// Name: ApicExtractor::GetCoresPerPkg
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//-----------------------------------------------------------------------------
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DWORD GetCoresPerPkg() const
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{
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return m_nCoresPerPkg;
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}
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//-----------------------------------------------------------------------------
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// Name: ApicExtractor::SetPackageTopology
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// Desc: You should call SetPackageTopology with the number of logical
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// processors per package and number of cores per package before calling
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// the sub id accessors (SmtId(), CoreId(), PackageId(), PackageCoreId())
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// as this information is required to effectively decode an APIC ID into
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// its sub parts.
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//-----------------------------------------------------------------------------
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void SetPackageTopology( DWORD nLogProcsPerPkg, DWORD nCoresPerPkg )
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{
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m_nLogProcsPerPkg = ( BYTE )nLogProcsPerPkg;
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m_nCoresPerPkg = ( BYTE )nCoresPerPkg;
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// fix for Phenom x3 and similar CPUs - it reports 3 logical processors per package, and 4 cores per package
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// so one core is probably just disabled for yield, but it causes a bug in GetMaskWidth that propagates
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if( m_nCoresPerPkg > m_nLogProcsPerPkg )
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{
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m_nCoresPerPkg = m_nLogProcsPerPkg;
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}
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m_smtIdMask.width = GetMaskWidth_( m_nLogProcsPerPkg / m_nCoresPerPkg );
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m_coreIdMask.width = GetMaskWidth_( m_nCoresPerPkg );
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m_pkgIdMask.width = 8 - ( m_smtIdMask.width + m_coreIdMask.width );
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m_pkgIdMask.mask = ( BYTE )( 0xFF << ( m_smtIdMask.width + m_coreIdMask.width ) );
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m_coreIdMask.mask = ( BYTE )( ( 0xFF << m_smtIdMask.width ) ^ m_pkgIdMask.mask );
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m_smtIdMask.mask = ( BYTE )~( 0xFF << m_smtIdMask.width );
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}
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private:
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//-----------------------------------------------------------------------------
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// Name: ApicExtractor::GetMaskWidth_
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// Desc: Gets the width of a sub id bit field in an APIC ID. The width of a
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// sub id (CORE_ID, SMT_ID) is only wide enough to support the maximum
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// number of ids that needs to be represented in the topology.
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//-----------------------------------------------------------------------------
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static BYTE GetMaskWidth_( BYTE maxIds )
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{
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--maxIds;
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// find index of msb
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BYTE msbIdx = 8;
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BYTE msbMask = 0x80;
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while( msbMask && !( msbMask & maxIds ) )
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{
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--msbIdx;
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msbMask >>= 1;
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}
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return msbIdx;
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}
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struct IdMask
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{
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BYTE width;
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BYTE mask;
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};
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// Private Members
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BYTE m_nLogProcsPerPkg;
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BYTE m_nCoresPerPkg;
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IdMask m_smtIdMask;
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IdMask m_coreIdMask;
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IdMask m_pkgIdMask;
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};
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//---------------------------------------------------------------------------------
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// Name: Cpuid
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// Desc: A utility class that wraps the functionality of the CPUID instruction.
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// Call the Call() method with the desired CPUID function, and use the
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// register accessors to retrieve the register values.
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//---------------------------------------------------------------------------------
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class Cpuid
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{
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public:
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// FnSet values are used to indicate a CPUID function set.
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enum FnSet
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{
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Std = 0x00000000,
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Ext = 0x80000000
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};
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|
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//-----------------------------------------------------------------------------
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// Name: Cpuid::Cpuid
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//-----------------------------------------------------------------------------
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Cpuid() : m_eax( 0 ),
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m_ebx( 0 ),
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m_ecx( 0 ),
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m_edx( 0 )
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{
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}
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|
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// Register accessors
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DWORD Eax() const
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{
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return m_eax;
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}
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DWORD Ebx() const
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{
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return m_ebx;
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}
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DWORD Ecx() const
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{
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return m_ecx;
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}
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DWORD Edx() const
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{
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return m_edx;
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}
|
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|
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//-----------------------------------------------------------------------------
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// Name: Cpuid::Call
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// Desc: Calls the CPUID instruction with the specified function. Returns TRUE
|
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// if the CPUID function was supported, FALSE if it wasn't.
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//-----------------------------------------------------------------------------
|
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BOOL Call( FnSet fnSet, DWORD fn )
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{
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if( IsFnSupported( fnSet, fn ) )
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{
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UncheckedCall_( fnSet, fn );
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return true;
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}
|
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return false;
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}
|
|
|
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//-----------------------------------------------------------------------------
|
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// Name: Cpuid::IsVendor
|
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// Desc: Compares a string with the vendor string encoded in the CPUID
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// instruction.
|
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//-----------------------------------------------------------------------------
|
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static BOOL IsVendor( const char* strVendor )
|
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{
|
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// Cache the vendor string
|
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static const Cpuid cpu( Std );
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return cpu.Ebx() == *reinterpret_cast<const DWORD*>( strVendor )
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&& cpu.Ecx() == *reinterpret_cast<const DWORD*>( strVendor + 8 )
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&& cpu.Edx() == *reinterpret_cast<const DWORD*>( strVendor + 4 );
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}
|
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|
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//-----------------------------------------------------------------------------
|
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// Name: Cpuid::IsFnSupported
|
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// Desc: Checks to see if a CPUID function is supported. Different processors
|
|
// support different functions. This method is automatically called from
|
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// the Call() method, so you don't need to call it beforehand.
|
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//-----------------------------------------------------------------------------
|
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static BOOL IsFnSupported( FnSet fnSet, DWORD fn )
|
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{
|
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// Cache the maximum supported standard function
|
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static const DWORD MaxStdFn = Cpuid( Std ).Eax();
|
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// Cache the maximum supported extended function
|
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static const DWORD MaxExtFn = Cpuid( Ext ).Eax();
|
|
|
|
bool ret = false;
|
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switch( fnSet )
|
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{
|
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case Std:
|
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ret = ( fn <= MaxStdFn );
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break;
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case Ext:
|
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ret = ( fn <= MaxExtFn );
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break;
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default:
|
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_ASSERT( 0 ); // should never get here
|
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break;
|
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}
|
|
return ret;
|
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}
|
|
|
|
private:
|
|
//-----------------------------------------------------------------------------
|
|
// Name: Cpuid::Cpuid
|
|
// Desc: This constructor is private and is only used to set a Cpuid object to
|
|
// initial values retrieved from CPUID functions 0x00000000 and
|
|
// 0x80000000. Good for caching values from the CPUID instruction that
|
|
// are not variable, like the encoded vendor string and the maximum
|
|
// supported CPUID function values.
|
|
//-----------------------------------------------------------------------------
|
|
explicit Cpuid( FnSet fnSet )
|
|
{
|
|
UncheckedCall_( fnSet, 0 );
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Name: Cpuid::UncheckedCall_
|
|
// Desc: Calls the CPUID instruction without checking for CPUID function
|
|
// support.
|
|
//-----------------------------------------------------------------------------
|
|
void UncheckedCall_( FnSet fnSet, DWORD fn )
|
|
{
|
|
#ifdef _WIN64
|
|
// Inline assembly is not supported in 64-bit. Ideally, we would prefer to
|
|
// use the __cpuid intrinsic to avoid having to drop to assembly altogether.
|
|
// However, as of MSVC 9.0, the __cpuid intrinsic does not enable the
|
|
// ability to set the ECX register, which is required for obtaining certain
|
|
// extended CPU information. To overcome these issues, we must call the
|
|
// Cpuid64() external function, which is written in assembly and located in
|
|
// the cpuid64.asm file included in this project. This project contains a build
|
|
// step that invokes 64-bit MASM on cpuid64.asm when building a 64-bit target.
|
|
m_eax = fnSet | fn;
|
|
m_ecx = 0;
|
|
Cpuid64(this);
|
|
#else
|
|
__asm
|
|
{
|
|
mov ecx, 0
|
|
mov eax, fn
|
|
or eax, fnSet
|
|
cpuid
|
|
mov edi, this
|
|
mov [edi].m_eax, eax
|
|
mov [edi].m_ebx, ebx
|
|
mov [edi].m_ecx, ecx
|
|
mov [edi].m_edx, edx
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// Private Members
|
|
DWORD m_eax;
|
|
DWORD m_ebx;
|
|
DWORD m_ecx;
|
|
DWORD m_edx;
|
|
};
|
|
|
|
//---------------------------------------------------------------------------------
|
|
// Name: CpuidImpl
|
|
// Desc: Provides the CPUID instruction implementation for the ICpuTopology
|
|
// interface. This is a ConcreteImplementor class in the traditional Bridge
|
|
// Pattern.
|
|
//---------------------------------------------------------------------------------
|
|
class CpuidImpl : public ICpuTopology
|
|
{
|
|
public:
|
|
// CpuidFnMasks are used when extracting bit-encoded information retrieved from
|
|
// the CPUID instruction
|
|
enum CpuidFnMasks
|
|
{
|
|
HTT = 0x10000000, // Fn0000_0001 EDX[28]
|
|
LogicalProcessorCount = 0x00FF0000, // Fn0000_0001 EBX[23:16]
|
|
ApicId = 0xFF000000, // Fn0000_0001 EBX[31:24]
|
|
NC_Intel = 0xFC000000, // Fn0000_0004 EAX[31:26]
|
|
NC_Amd = 0x000000FF, // Fn8000_0008 ECX[7:0]
|
|
CmpLegacy_Amd = 0x00000002, // Fn8000_0001 ECX[1]
|
|
ApicIdCoreIdSize_Amd = 0x0000F000 // Fn8000_0008 ECX[15:12]
|
|
};
|
|
|
|
enum
|
|
{
|
|
MaxLogicalProcessors = sizeof( DWORD_PTR ) * 8
|
|
};
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Name: CpuidImpl::CpuidImpl
|
|
// Desc: Initializes internal structures/data with information retrieved from
|
|
// calling the CPUID instruction.
|
|
//-----------------------------------------------------------------------------
|
|
CpuidImpl() : m_nItems( 0 )
|
|
{
|
|
_ASSERT( IsSupported() );
|
|
|
|
DWORD nLogProcsPerPkg = 1;
|
|
DWORD nCoresPerPkg = 1;
|
|
|
|
Cpuid cpu;
|
|
|
|
// Determine if hardware threading is enabled.
|
|
cpu.Call( Cpuid::Std, 1 );
|
|
if( cpu.Edx() & HTT )
|
|
{
|
|
// Determine the total number of logical processors per package.
|
|
nLogProcsPerPkg = ( cpu.Ebx() & LogicalProcessorCount ) >> 16;
|
|
|
|
// Determine the total number of cores per package. This info
|
|
// is extracted differently dependending on the cpu vendor.
|
|
if( Cpuid::IsVendor( GenuineIntel ) )
|
|
{
|
|
if( cpu.Call( Cpuid::Std, 4 ) )
|
|
{
|
|
nCoresPerPkg = ( ( cpu.Eax() & NC_Intel ) >> 26 ) + 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_ASSERT( Cpuid::IsVendor( AuthenticAMD ) );
|
|
if( cpu.Call( Cpuid::Ext, 8 ) )
|
|
{
|
|
// AMD reports the msb width of the CORE_ID bit field of the APIC ID
|
|
// in ApicIdCoreIdSize_Amd. The maximum value represented by the msb
|
|
// width is the theoretical number of cores the processor can support
|
|
// and not the actual number of current cores, which is how the msb width
|
|
// of the CORE_ID bit field has been traditionally determined. If the
|
|
// ApicIdCoreIdSize_Amd value is zero, then you use the traditional method
|
|
// to determine the CORE_ID msb width.
|
|
DWORD msbWidth = cpu.Ecx() & ApicIdCoreIdSize_Amd;
|
|
if( msbWidth )
|
|
{
|
|
// Set nCoresPerPkg to the maximum theortical number of cores
|
|
// the processor package can support (2 ^ width) so the APIC
|
|
// extractor object can be configured to extract the proper
|
|
// values from an APIC.
|
|
nCoresPerPkg = 1 << ( msbWidth >> 12 );
|
|
}
|
|
else
|
|
{
|
|
// Set nCoresPerPkg to the actual number of cores being reported
|
|
// by the CPUID instruction.
|
|
nCoresPerPkg = ( cpu.Ecx() & NC_Amd ) + 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Configure the APIC extractor object with the information it needs to
|
|
// be able to decode the APIC.
|
|
m_apicExtractor.SetPackageTopology( nLogProcsPerPkg, nCoresPerPkg );
|
|
|
|
DWORD_PTR dwProcessAffinity, dwSystemAffinity;
|
|
HANDLE hProcess = GetCurrentProcess();
|
|
HANDLE hThread = GetCurrentThread();
|
|
GetProcessAffinityMask( hProcess, &dwProcessAffinity, &dwSystemAffinity );
|
|
if( 1 == dwSystemAffinity )
|
|
{
|
|
// Since we only have 1 logical processor present on the system, we
|
|
// can explicitly set a single APIC ID to zero.
|
|
_ASSERT( 1 == nLogProcsPerPkg );
|
|
m_apicIds[m_nItems++] = 0;
|
|
}
|
|
else
|
|
{
|
|
// Set the process affinity to the system affinity if they are not
|
|
// equal so that all logical processors can be accounted for.
|
|
if( dwProcessAffinity != dwSystemAffinity )
|
|
{
|
|
SetProcessAffinityMask( hProcess, dwSystemAffinity );
|
|
}
|
|
|
|
// Call cpuid on each active logical processor in the system affinity.
|
|
DWORD_PTR dwPrevThreadAffinity = 0;
|
|
for( DWORD_PTR dwThreadAffinity = 1;
|
|
dwThreadAffinity && dwThreadAffinity <= dwSystemAffinity;
|
|
dwThreadAffinity <<= 1 )
|
|
{
|
|
if( dwSystemAffinity & dwThreadAffinity )
|
|
{
|
|
if( 0 == dwPrevThreadAffinity )
|
|
{
|
|
// Save the previous thread affinity so we can return
|
|
// the executing thread affinity back to this state.
|
|
_ASSERT( 0 == m_nItems );
|
|
dwPrevThreadAffinity = SetThreadAffinityMask( hThread,
|
|
dwThreadAffinity );
|
|
}
|
|
else
|
|
{
|
|
_ASSERT( m_nItems > 0 );
|
|
SetThreadAffinityMask( hThread, dwThreadAffinity );
|
|
}
|
|
|
|
// Allow the thread to switch to masked logical processor.
|
|
Sleep( 0 );
|
|
|
|
// Store the APIC ID
|
|
cpu.Call( Cpuid::Std, 1 );
|
|
m_apicIds[m_nItems++] = ( BYTE )( ( cpu.Ebx() & ApicId ) >> 24 );
|
|
}
|
|
}
|
|
|
|
// Restore the previous process and thread affinity state.
|
|
SetProcessAffinityMask( hProcess, dwProcessAffinity );
|
|
SetThreadAffinityMask( hThread, dwPrevThreadAffinity );
|
|
Sleep( 0 );
|
|
}
|
|
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Name: CpuidImpl::IsDefaultImpl
|
|
//-----------------------------------------------------------------------------
|
|
/*virtual*/ BOOL IsDefaultImpl() const
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Name: CpuidImpl::NumberOfProcessCores
|
|
// Desc: Gets the number of processor cores available to the current process.
|
|
// The total accounts for cores that may have been masked out by process
|
|
// affinity.
|
|
//-----------------------------------------------------------------------------
|
|
/*virtual*/ DWORD NumberOfProcessCores() const
|
|
{
|
|
DWORD_PTR dwProcessAffinity, dwSystemAffinity;
|
|
GetProcessAffinityMask( GetCurrentProcess(), &dwProcessAffinity, &dwSystemAffinity );
|
|
|
|
BYTE pkgCoreIds[MaxLogicalProcessors] = { 0 };
|
|
DWORD nPkgCoreIds = 0;
|
|
|
|
for( DWORD i = 0; i < m_nItems; ++i )
|
|
{
|
|
if( dwProcessAffinity & ( ( DWORD_PTR )1 << i ) )
|
|
{
|
|
AddUniquePkgCoreId_( i, pkgCoreIds, nPkgCoreIds );
|
|
}
|
|
}
|
|
return nPkgCoreIds;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Name: CpuidImpl::NumberOfSystemCores
|
|
// Desc: Gets the number of processor cores on the system.
|
|
//-----------------------------------------------------------------------------
|
|
/*virtual*/ DWORD NumberOfSystemCores() const
|
|
{
|
|
BYTE pkgCoreIds[MaxLogicalProcessors] = { 0 };
|
|
DWORD nPkgCoreIds = 0;
|
|
for( DWORD i = 0; i < m_nItems; ++i )
|
|
{
|
|
AddUniquePkgCoreId_( i, pkgCoreIds, nPkgCoreIds );
|
|
}
|
|
return nPkgCoreIds;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Name: CpuidImpl::CoreAffinityMask
|
|
// Desc: Gets an affinity mask that corresponds to a specific processor core.
|
|
// coreIdx must be less than the total number of processor cores
|
|
// recognized by the operating system (NumberOfSystemCores()).
|
|
//-----------------------------------------------------------------------------
|
|
/*virtual*/ DWORD_PTR CoreAffinityMask( DWORD coreIdx ) const
|
|
{
|
|
BYTE pkgCoreIds[MaxLogicalProcessors] = { 0 };
|
|
DWORD nPkgCoreIds = 0;
|
|
for( DWORD i = 0; i < m_nItems; ++i )
|
|
{
|
|
AddUniquePkgCoreId_( i, pkgCoreIds, nPkgCoreIds );
|
|
}
|
|
|
|
DWORD_PTR dwProcessAffinity, dwSystemAffinity;
|
|
GetProcessAffinityMask( GetCurrentProcess(), &dwProcessAffinity, &dwSystemAffinity );
|
|
|
|
DWORD_PTR coreAffinity = 0;
|
|
if( coreIdx < nPkgCoreIds )
|
|
{
|
|
for( DWORD i = 0; i < m_nItems; ++i )
|
|
{
|
|
if( m_apicExtractor.PackageCoreId( m_apicIds[i] ) == pkgCoreIds[coreIdx] )
|
|
{
|
|
coreAffinity |= ( dwProcessAffinity & ( ( DWORD_PTR )1 << i ) );
|
|
}
|
|
}
|
|
}
|
|
return coreAffinity;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Name: CpuidImpl::IsSupported
|
|
// Desc: Indicates if a CpuidImpl object is supported on this platform.
|
|
// Support is only granted on Intel and AMD platforms where the current
|
|
// calling process has security rights to query process affinity and
|
|
// change it if the process and system affinity differ. CpuidImpl is
|
|
// also not supported if thread affinity cannot be set on systems with
|
|
// more than 1 logical processor.
|
|
//-----------------------------------------------------------------------------
|
|
static BOOL IsSupported()
|
|
{
|
|
BOOL bSupported = Cpuid::IsVendor( GenuineIntel )
|
|
|| Cpuid::IsVendor( AuthenticAMD );
|
|
|
|
if( bSupported )
|
|
{
|
|
DWORD_PTR dwProcessAffinity, dwSystemAffinity;
|
|
HANDLE hProcess = GetCurrentProcess();
|
|
|
|
// Query process affinity mask
|
|
bSupported = GetProcessAffinityMask( hProcess, &dwProcessAffinity, &dwSystemAffinity );
|
|
if( bSupported )
|
|
{
|
|
if( dwProcessAffinity != dwSystemAffinity )
|
|
{
|
|
// The process and system affinities differ. Attempt to set
|
|
// the process affinity to the system affinity.
|
|
bSupported = SetProcessAffinityMask( hProcess, dwSystemAffinity );
|
|
if( bSupported )
|
|
{
|
|
// Restore previous process affinity
|
|
bSupported = SetProcessAffinityMask( hProcess, dwProcessAffinity );
|
|
}
|
|
}
|
|
|
|
if( bSupported && ( dwSystemAffinity > 1 ) )
|
|
{
|
|
// Attempt to set the thread affinity
|
|
HANDLE hThread = GetCurrentThread();
|
|
DWORD_PTR dwThreadAffinity = SetThreadAffinityMask( hThread, dwProcessAffinity );
|
|
if( dwThreadAffinity )
|
|
{
|
|
// Restore the previous thread affinity
|
|
bSupported = 0 != SetThreadAffinityMask( hThread, dwThreadAffinity );
|
|
}
|
|
else
|
|
{
|
|
bSupported = FALSE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return bSupported;
|
|
}
|
|
|
|
private:
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Name: CpuidImpl::AddUniquePkgCoreId_
|
|
// Desc: Adds the package/core id extracted from the APIC ID at m_apicIds[idx]
|
|
// in the if the package/core id is unique to the pkgCoreIds array.
|
|
// nPkgCore is an in/out parm that will reflect the total number of items
|
|
// in pkgCoreIds array. It will be incrememted if a unique package/core
|
|
// id is found and added.
|
|
//-----------------------------------------------------------------------------
|
|
void AddUniquePkgCoreId_( DWORD idx, BYTE* pkgCoreIds, DWORD& nPkgCoreIds ) const
|
|
{
|
|
_ASSERT( idx < m_nItems );
|
|
_ASSERT( NULL != pkgCoreIds );
|
|
|
|
DWORD j;
|
|
for( j = 0; j < nPkgCoreIds; ++j )
|
|
{
|
|
if( pkgCoreIds[j] == m_apicExtractor.PackageCoreId( m_apicIds[idx] ) )
|
|
break;
|
|
}
|
|
if( j == nPkgCoreIds )
|
|
{
|
|
pkgCoreIds[j] = m_apicExtractor.PackageCoreId( m_apicIds[idx] );
|
|
++nPkgCoreIds;
|
|
}
|
|
}
|
|
|
|
// Private Members
|
|
BYTE m_apicIds[MaxLogicalProcessors];
|
|
BYTE m_nItems;
|
|
ApicExtractor m_apicExtractor;
|
|
|
|
// Supported Vendor Strings
|
|
static const char GenuineIntel[];
|
|
static const char AuthenticAMD[];
|
|
};
|
|
|
|
// Static initialization of vendor strings
|
|
const char CpuidImpl::GenuineIntel[] = "GenuineIntel";
|
|
const char CpuidImpl::AuthenticAMD[] = "AuthenticAMD";
|
|
|
|
} // unnamed-namespace
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Name: CpuTopology::CpuTopology
|
|
// Desc: Initializes this object with the appropriately supported cpu topology
|
|
// implementation object.
|
|
//-------------------------------------------------------------------------------------
|
|
CpuTopology::CpuTopology( BOOL bForceCpuid ) : m_pImpl( NULL )
|
|
{
|
|
ForceCpuid( bForceCpuid );
|
|
}
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Name: CpuTopology::~CpuTopology
|
|
//-------------------------------------------------------------------------------------
|
|
CpuTopology::~CpuTopology()
|
|
{
|
|
Destroy_();
|
|
}
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Name: CpuTopology::NumberOfProcessCores
|
|
// Desc: Gets the total number of physical processor cores available to the current
|
|
// process.
|
|
//-------------------------------------------------------------------------------------
|
|
DWORD CpuTopology::NumberOfProcessCores() const
|
|
{
|
|
return m_pImpl->NumberOfProcessCores();
|
|
}
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Name: CpuTopology::NumberOfSystemCores
|
|
// Desc: Gets the total number of physical processor cores enabled on the system.
|
|
//-------------------------------------------------------------------------------------
|
|
DWORD CpuTopology::NumberOfSystemCores() const
|
|
{
|
|
return m_pImpl->NumberOfSystemCores();
|
|
}
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Name: CpuTopology::CoreAffinityMask
|
|
// Desc: Gets an affinity mask that corresponds to the requested processor core.
|
|
//-------------------------------------------------------------------------------------
|
|
DWORD_PTR CpuTopology::CoreAffinityMask( DWORD coreIdx ) const
|
|
{
|
|
return m_pImpl->CoreAffinityMask( coreIdx );
|
|
}
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Name: CpuTopology::IsDefaultImpl
|
|
// Desc: Returns TRUE if m_pImpl is a DefaultImpl object, FALSE if not. Used to
|
|
// indicate whether or not the prescribed methods (CPUID or
|
|
// GetLogicalProcessorInformation) are supported on the system.
|
|
//-------------------------------------------------------------------------------------
|
|
BOOL CpuTopology::IsDefaultImpl() const
|
|
{
|
|
return m_pImpl->IsDefaultImpl();
|
|
}
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Name: CpuTopology::ForceCpuid
|
|
// Desc: Constructs a cpu topology object. If bForce is FALSE, then a GlpiImpl object
|
|
// is first attempted, then CpuidImpl, then finally DefaultImpl. If bForce is
|
|
// TRUE, then GlpiImpl is never attempted.
|
|
//-------------------------------------------------------------------------------------
|
|
void CpuTopology::ForceCpuid( BOOL bForce )
|
|
{
|
|
Destroy_();
|
|
|
|
if( !bForce && GlpiImpl::IsSupported() )
|
|
{
|
|
m_pImpl = new GlpiImpl();
|
|
}
|
|
else if( CpuidImpl::IsSupported() )
|
|
{
|
|
m_pImpl = new CpuidImpl();
|
|
}
|
|
else
|
|
{
|
|
m_pImpl = new DefaultImpl();
|
|
}
|
|
}
|
|
|
|
//-------------------------------------------------------------------------------------
|
|
// Name: CpuTopology::Destroy_
|
|
//-------------------------------------------------------------------------------------
|
|
void CpuTopology::Destroy_()
|
|
{
|
|
delete m_pImpl;
|
|
m_pImpl = NULL;
|
|
}
|
|
#endif |