lcpu.cpp File Reference

#include "precompiled.h"
#include "lib/sysdep/os_cpu.h"
#include "lib/alignment.h"
#include "lib/bits.h"
#include "lib/config2.h"
#include "lib/module_init.h"

Include dependency graph for lcpu.cpp:

Functions
size_t	os_cpu_NumProcessors ()
uintptr_t	os_cpu_ProcessorMask ()
size_t	os_cpu_PageSize ()
size_t	os_cpu_LargePageSize ()
size_t	os_cpu_QueryMemorySize ()
size_t	os_cpu_MemoryAvailable ()
static bool	IsMaxCpusSufficient ()
static Status	DetectMaxCpus ()
uintptr_t	os_cpu_SetThreadAffinityMask (uintptr_t processorMask)
	restrict the current thread to a set of processors. More...
Status	os_cpu_CallByEachCPU (OsCpuCallback cb, uintptr_t cbData)
	execute the specified function once on each processor. More...

Variables
static size_t	maxCpus

Function Documentation

DetectMaxCpus()

static Status DetectMaxCpus ( )

static

IsMaxCpusSufficient()

static bool IsMaxCpusSufficient ( )

static

os_cpu_CallByEachCPU()

Status os_cpu_CallByEachCPU	(	OsCpuCallback	cb,
		uintptr_t	cbData
	)

execute the specified function once on each processor.

this proceeds serially (the callback is never reentered) in increasing order of processor ID. fails if process affinity prevents running on all processors.

os_cpu_LargePageSize()

size_t os_cpu_LargePageSize

(

)

Returns

the size [bytes] of a large MMU page (4 MiB on most IA-32 systems) or zero if they are not supported.

os_cpu_MemoryAvailable()

size_t os_cpu_MemoryAvailable

(

)

Returns

the current amount [MB] of available memory.

os_cpu_NumProcessors()

size_t os_cpu_NumProcessors

(

)

Returns

the number of processors available to this process.

note: this function is necessary because POSIX sysconf _SC_NPROCESSORS_CONF is not suppored on MacOSX, else we would use that.

os_cpu_PageSize()

size_t os_cpu_PageSize

(

)

Returns

the size [bytes] of a MMU page (4096 on most IA-32 systems)

os_cpu_ProcessorMask()

uintptr_t os_cpu_ProcessorMask

(

)

Returns

bit mask of processors that exist and are available to this process. its population count is by definition equal to os_cpu_NumProcessors().

os_cpu_QueryMemorySize()

size_t os_cpu_QueryMemorySize

(

)

Returns

the size [MB] of physical memory as reported by the OS; no caching/validation is performed.

os_cpu_SetThreadAffinityMask()

uintptr_t os_cpu_SetThreadAffinityMask

(

uintptr_t

processorMask

)

restrict the current thread to a set of processors.

Parameters

processorMask

a bit mask of acceptable processors (bit index i corresponds to processor i)

Returns

the previous mask

Variable Documentation

maxCpus

size_t maxCpus

static