wnuma.cpp File Reference

#include "precompiled.h"
#include "lib/sysdep/numa.h"
#include "lib/bits.h"
#include "lib/alignment.h"
#include "lib/timer.h"
#include "lib/module_init.h"
#include "lib/sysdep/vm.h"
#include "lib/sysdep/acpi.h"
#include "lib/sysdep/os_cpu.h"
#include "lib/sysdep/os/win/win.h"
#include "lib/sysdep/os/win/wutil.h"
#include "lib/sysdep/os/win/wcpu.h"
#include <Psapi.h>

Include dependency graph for wnuma.cpp:

Classes
struct	Node
struct	SLIT

Functions
static Node *	AddNode ()
static Node *	FindNodeWithProcessorMask (uintptr_t processorMask)
static Node *	FindNodeWithProcessor (size_t processor)
static UCHAR	HighestNodeNumber ()
static void	PopulateNodes ()
static Status	InitTopology ()
size_t	numa_NumNodes ()
size_t	numa_NodeFromProcessor (size_t processor)
uintptr_t	numa_ProcessorMaskFromNode (size_t node)
static UCHAR	NodeNumberFromNode (size_t node)
size_t	numa_AvailableMemory (size_t node)
static double	ReadRelativeDistanceFromSLIT (const SLIT *slit)
static double	MeasureRelativeDistance ()
static Status	InitRelativeDistance ()
double	numa_Factor ()
static bool	IsMemoryInterleaved ()
static Status	InitMemoryInterleaved ()
bool	numa_IsMemoryInterleaved ()

Variables
static Node	nodes [os_cpu_MaxProcessors]
static size_t	numNodes
static ModuleInitState	initState
static double	relativeDistance
static bool	isMemoryInterleaved

Function Documentation

static Node* AddNode ( )

static

static Node* FindNodeWithProcessor ( size_t  processor )

static

static Node* FindNodeWithProcessorMask ( uintptr_t  processorMask )

static

static UCHAR HighestNodeNumber ( )

static

static Status InitMemoryInterleaved ( )

static

static Status InitRelativeDistance ( )

static

static Status InitTopology ( )

static

static bool IsMemoryInterleaved ( )

static

static double MeasureRelativeDistance ( )

static

static UCHAR NodeNumberFromNode ( size_t  node )

static

size_t numa_AvailableMemory

(

size_t

node

)

Parameters

node

Returns

bytes of memory available for allocation on <node>.

double numa_Factor

(

)

Returns

the ratio between maximum and minimum times that one processor from each node required to fill a globally allocated array. in other words, this is the maximum slowdown for NUMA-oblivious memory accesses. Microsoft guidelines require it to be <= 3.

bool numa_IsMemoryInterleaved

(

)

Returns

an indication of whether memory pages are node-interleaved.

note: this requires ACPI access, which may not be available on least-permission accounts. the default is to return false so as not to cause callers to panic and trigger performance warnings.

size_t numa_NodeFromProcessor

(

size_t

processor

)

Parameters

processor

Returns

node number (zero-based) to which <processor> belongs.

size_t numa_NumNodes

(

)

Returns

number of NUMA "nodes" (i.e. groups of CPUs with local memory).

uintptr_t numa_ProcessorMaskFromNode

(

size_t

node

)

Parameters

node

Returns

bit-mask of all processors constituting <node>.

static void PopulateNodes ( )

static

static double ReadRelativeDistanceFromSLIT ( const SLIT *  slit )

static

Variable Documentation

ModuleInitState initState

static

bool isMemoryInterleaved

static

Node nodes[os_cpu_MaxProcessors]

static

size_t numNodes

static

double relativeDistance

static