madness::ThreadBindingInfo Struct Reference

Description of the CPU affinity of the calling process. More...

#include <thread_binding.h>

Public Member Functions
std::size_t	ncpu_allowed () const
	Number of hardware threads this process may run on.

Public Attributes
bool	available = false
std::vector< int >	cpus
	Logical (hardware thread) ids this process is allowed to run on.
int	ncpu_configured = 0
	Number of logical CPUs configured on this host (not just allowed).
std::vector< int >	numa_nodes

Detailed Description

Description of the CPU affinity of the calling process.

Filled in by get_thread_binding_info(); all information is obtained from the OS (sched_getaffinity(2) and sysfs), no external library is needed.

Member Function Documentation

ncpu_allowed()

std::size_t madness::ThreadBindingInfo::ncpu_allowed ( ) const

inline

Number of hardware threads this process may run on.

References cpus.

Referenced by madness::check_thread_binding().

Member Data Documentation

available

bool madness::ThreadBindingInfo::available = false

True if the platform exposes CPU affinity (Linux). On macOS, or if the affinity query failed, this is false and all other members are meaningless.

Referenced by madness::check_thread_binding(), and madness::get_thread_binding_info().

cpus

std::vector<int> madness::ThreadBindingInfo::cpus

Logical (hardware thread) ids this process is allowed to run on.

Referenced by madness::check_thread_binding(), madness::get_thread_binding_info(), and ncpu_allowed().

ncpu_configured

int madness::ThreadBindingInfo::ncpu_configured = 0

Number of logical CPUs configured on this host (not just allowed).

Referenced by madness::check_thread_binding(), and madness::get_thread_binding_info().

numa_nodes

std::vector<int> madness::ThreadBindingInfo::numa_nodes

Distinct NUMA nodes spanned by cpus, sorted; empty if the NUMA topology could not be determined.

Referenced by madness::check_thread_binding(), and madness::get_thread_binding_info().

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The documentation for this struct was generated from the following file:

• thread_binding.h