topology Namespace Reference

Classes
struct	ApicField
struct	CpuTopology
class	CacheRelations
struct	CacheTopology

Functions
static size_t	MaxCoresPerPackage ()
static size_t	MaxLogicalPerCore ()
static size_t	MaxLogicalPerCache ()
static Status	InitCpuTopology ()
size_t	NumPackages ()
size_t	CoresPerPackage ()
size_t	LogicalPerCore ()
size_t	LogicalFromApicId (ApicId apicId)
size_t	CoreFromApicId (ApicId apicId)
size_t	PackageFromApicId (ApicId apicId)
ApicId	ApicIdFromIndices (size_t idxPackage, size_t idxCore, size_t idxLogical)
static void	DetermineCachesProcessorMask (uintptr_t *cachesProcessorMask, size_t &numCaches)
static void	DetermineProcessorsCache (const uintptr_t *cachesProcessorMask, size_t numCaches, size_t *processorsCache, size_t numProcessors)
static Status	InitCacheTopology ()
size_t	NumCaches ()
size_t	CacheFromProcessor (size_t processor)
uintptr_t	ProcessorMaskFromCache (size_t cache)

Variables
static CpuTopology	cpuTopology
static ModuleInitState	cpuInitState
static CacheTopology	cacheTopology
static ModuleInitState	cacheInitState

Function Documentation

LIB_API ApicId topology::ApicIdFromIndices	(	size_t	idxPackage,
		size_t	idxCore,
		size_t	idxLogical
	)

Parameters

idxPackage,idxCore,idxLogical

return values of *FromApicId

Returns

APIC ID (see note at AreApicIdsReliable)

Definition at line 281 of file topology.cpp.

LIB_API size_t topology::CacheFromProcessor

(

size_t

processor

)

Returns

L2 cache number (zero-based) to which the given processor belongs.

Definition at line 460 of file topology.cpp.

LIB_API size_t topology::CoreFromApicId

(

ApicId

apicId

)

Returns

index of processor core in [0, CoresPerPackage())

Definition at line 268 of file topology.cpp.

LIB_API size_t topology::CoresPerPackage

(

)

Returns

number of enabled CPU cores per package. (2 on dual-core systems)

Definition at line 250 of file topology.cpp.

static void topology::DetermineCachesProcessorMask ( uintptr_t *  cachesProcessorMask, size_t &  numCaches  )

static

Definition at line 387 of file topology.cpp.

static void topology::DetermineProcessorsCache ( const uintptr_t *  cachesProcessorMask, size_t  numCaches, size_t *  processorsCache, size_t  numProcessors  )

static

Definition at line 416 of file topology.cpp.

static Status topology::InitCacheTopology ( )

static

Definition at line 446 of file topology.cpp.

static Status topology::InitCpuTopology ( )

static

Definition at line 154 of file topology.cpp.

LIB_API size_t topology::LogicalFromApicId

(

ApicId

apicId

)

Returns

index of logical processor in [0, LogicalPerCore())

Definition at line 262 of file topology.cpp.

LIB_API size_t topology::LogicalPerCore

(

)

Returns

number of enabled logical processors (aka Hyperthreads) per core. (2 on P4 EE)

Definition at line 256 of file topology.cpp.

static size_t topology::MaxCoresPerPackage ( )

static

Definition at line 48 of file topology.cpp.

static size_t topology::MaxLogicalPerCache ( )

static

Definition at line 114 of file topology.cpp.

static size_t topology::MaxLogicalPerCore ( )

static

Definition at line 77 of file topology.cpp.

LIB_API size_t topology::NumCaches

(

)

Returns

number of distinct L2 caches.

Definition at line 454 of file topology.cpp.

LIB_API size_t topology::NumPackages

(

)

Returns

number of enabled CPU packages / sockets.

Definition at line 244 of file topology.cpp.

LIB_API size_t topology::PackageFromApicId

(

ApicId

apicId

)

Returns

index of processor package/socket in [0, NumPackages())

Definition at line 274 of file topology.cpp.

LIB_API uintptr_t topology::ProcessorMaskFromCache

(

size_t

cache

)

Returns

bit-mask of all processors sharing the given cache.

Definition at line 467 of file topology.cpp.

Variable Documentation

ModuleInitState topology::cacheInitState

static

Definition at line 444 of file topology.cpp.

CacheTopology topology::cacheTopology

static

Definition at line 443 of file topology.cpp.

ModuleInitState topology::cpuInitState

static

Definition at line 152 of file topology.cpp.

CpuTopology topology::cpuTopology

static

Definition at line 151 of file topology.cpp.