jau::cpu::CpuInfo Class Reference

Singleton CpuInfo caching all jau::cpu information. More...

#include <cpuid.hpp>

Collaboration diagram for jau::cpu::CpuInfo:

Public Member Functions
	CpuInfo (const CpuInfo &)=delete
size_t	online_core_count () const noexcept
	Returns maximum number of available/online cores, i.e.
void	operator= (const CpuInfo &)=delete
std::string	toString () const noexcept
std::string	toString (std::string &sb, bool details_only=false) const noexcept

Static Public Member Functions
static const CpuInfo &	get () noexcept
	Returns reference to const singleton instance.

Public Attributes
arm32_hwcap1_t	arm32_hwcap1
	arm32_hwcap1_t info if available, i.e.
arm32_hwcap2_t	arm32_hwcap2
	arm32_hwcap2_t info if available, i.e.
arm64_hwcap_t	arm64_hwcap
	arm64_hwcap_t info if available, i.e.
jau::endian_t	byte_order
size_t	concurrent_threads
	Number of available concurrent threads (cores) or zero if information is not available, using C++11 std::thread::hardware_concurrency()
cpu_family_t	family
	cpu_family_t derived from Architectures predefined compiler macros.
bool	has_arm32_hwcap
	True if successfully queried arm32_hwcap1 and arm32_hwcap1 on cpu_family_t::arm32.
bool	has_arm64_hwcap
	True if successfully queried arm64_hwcap on cpu_family_t::arm64.
bool	has_l1_minmax
	True if successfully queried l1_share_max and l1_apart_min.
size_t	l1_apart_min
	Minimum offset between two objects to avoid false sharing if has_l1_minmax, or zero.
size_t	l1_share_max
	Maximum size of contiguous memory to promote true sharing if has_l1_minmax, or zero.
size_t	page_size
	Size of a page in bytes or zero if not available.
size_t	pointer_bits
	See pointer_bit_size()
size_t	sys_max_cores
	Number of installed/configured cores from system call.
size_t	sys_online_cores
	Number of available/online cores from system call.

Detailed Description

Singleton CpuInfo caching all jau::cpu information.

Definition at line 179 of file cpuid.hpp.

Constructor & Destructor Documentation

CpuInfo()

jau::cpu::CpuInfo::CpuInfo ( const CpuInfo & )

delete

Member Function Documentation

operator=()

void jau::cpu::CpuInfo::operator= ( const CpuInfo & )

delete

get()

static const CpuInfo & jau::cpu::CpuInfo::get ( )

inlinestaticnoexcept

Returns reference to const singleton instance.

Definition at line 219 of file cpuid.hpp.

Here is the caller graph for this function:

online_core_count()

size_t jau::cpu::CpuInfo::online_core_count ( ) const

inlinenoexcept

Returns maximum number of available/online cores, i.e.

max(sys_online_cores, concurrent_threads).

Definition at line 225 of file cpuid.hpp.

Here is the caller graph for this function:

toString() [1/2]

std::string jau::cpu::CpuInfo::toString ( std::string & sb, bool details_only = false ) const

noexcept

Definition at line 275 of file cpuid.cpp.

Here is the caller graph for this function:

toString() [2/2]

std::string jau::cpu::CpuInfo::toString ( ) const

inlinenoexcept

Definition at line 230 of file cpuid.hpp.

Here is the caller graph for this function:

Member Data Documentation

pointer_bits

size_t jau::cpu::CpuInfo::pointer_bits

See pointer_bit_size()

Definition at line 182 of file cpuid.hpp.

page_size

size_t jau::cpu::CpuInfo::page_size

Size of a page in bytes or zero if not available.

Definition at line 184 of file cpuid.hpp.

has_l1_minmax

bool jau::cpu::CpuInfo::has_l1_minmax

True if successfully queried l1_share_max and l1_apart_min.

Definition at line 186 of file cpuid.hpp.

l1_share_max

size_t jau::cpu::CpuInfo::l1_share_max

Maximum size of contiguous memory to promote true sharing if has_l1_minmax, or zero.

Definition at line 188 of file cpuid.hpp.

l1_apart_min

size_t jau::cpu::CpuInfo::l1_apart_min

Minimum offset between two objects to avoid false sharing if has_l1_minmax, or zero.

Definition at line 190 of file cpuid.hpp.

concurrent_threads

size_t jau::cpu::CpuInfo::concurrent_threads

Number of available concurrent threads (cores) or zero if information is not available, using C++11 std::thread::hardware_concurrency()

Definition at line 192 of file cpuid.hpp.

sys_online_cores

size_t jau::cpu::CpuInfo::sys_online_cores

Number of available/online cores from system call.

Definition at line 194 of file cpuid.hpp.

sys_max_cores

size_t jau::cpu::CpuInfo::sys_max_cores

Number of installed/configured cores from system call.

Definition at line 196 of file cpuid.hpp.

family

cpu_family_t jau::cpu::CpuInfo::family

cpu_family_t derived from Architectures predefined compiler macros.

Definition at line 198 of file cpuid.hpp.

byte_order

jau::endian_t jau::cpu::CpuInfo::byte_order

Definition at line 199 of file cpuid.hpp.

has_arm32_hwcap

bool jau::cpu::CpuInfo::has_arm32_hwcap

True if successfully queried arm32_hwcap1 and arm32_hwcap1 on cpu_family_t::arm32.

Definition at line 201 of file cpuid.hpp.

arm32_hwcap1

arm32_hwcap1_t jau::cpu::CpuInfo::arm32_hwcap1

arm32_hwcap1_t info if available, i.e.

has_arm32_hwcap

Definition at line 203 of file cpuid.hpp.

arm32_hwcap2

arm32_hwcap2_t jau::cpu::CpuInfo::arm32_hwcap2

arm32_hwcap2_t info if available, i.e.

has_arm32_hwcap

Definition at line 205 of file cpuid.hpp.

has_arm64_hwcap

bool jau::cpu::CpuInfo::has_arm64_hwcap

True if successfully queried arm64_hwcap on cpu_family_t::arm64.

Definition at line 207 of file cpuid.hpp.

arm64_hwcap

arm64_hwcap_t jau::cpu::CpuInfo::arm64_hwcap

arm64_hwcap_t info if available, i.e.

has_arm64_hwcap

Definition at line 209 of file cpuid.hpp.

---

The documentation for this class was generated from the following files:

• include/jau/cpuid.hpp
• src/cpuid.cpp