numapp::ll Namespace Reference

Defines lowlevel functions that should not be used directly. More...

Functions
std::error_code	SetSchedulerPolicy (pid_t pid, int policy, int static_priority, int dynamic_priority) noexcept
	A low-level, and error prone function to set policy.
std::error_code	GetSchedulerPolicy (pid_t pid, int *policy, int *static_priority, int *dynamic_priority) noexcept
	A low-level, and error prone function to get policy.
std::error_code	GetCpuAffinity (pid_t ttid, Cpumask &mask) noexcept
	Get CPU affinity.
std::error_code	SetCpuAffinity (pid_t ttid, Cpumask const &mask) noexcept
	Set CPU affinity.
std::error_code	NumaNodeToCpumask (int node, Cpumask &mask) noexcept
	Convert NUMA node number to corresponding CPU mask.
std::error_code	GetMemPolicy (int &mode, Nodemask &mask, void *addr, unsigned flags) noexcept
	Get memory policy for calling thread or an address.
std::error_code	SetMemPolicy (int mode, Nodemask const &mask) noexcept
	Set active memory policy for calling thread.
std::error_code	SetMemPolicy (void *addr, std::size_t len, int mode, Nodemask const &mask, unsigned flags) noexcept
	Set memory policy for memory range.

Detailed Description

Defines lowlevel functions that should not be used directly.

Function Documentation

GetCpuAffinity()

std::error_code numapp::ll::GetCpuAffinity ( pid_t ttid, Cpumask & mask )

noexcept

Get CPU affinity.

Parameters

	ttid	Thread id to get the affinity from.
[out]	mask

Returns

error code.

Related man-page(s):

• numa(3)

GetMemPolicy()

std::error_code numapp::ll::GetMemPolicy ( int & mode, Nodemask & mask, void * addr, unsigned flags )

noexcept

Get memory policy for calling thread or an address.

See manpage for details.

Related man-page(s):

• get_mempolicy(2)

Parameters

[out]	mode	memory policy.
[out]	mask	The output nodemask.
[in]	addr	Address to get policy for.
[in]	flags	Determines operation.

Returns

errors from get_mempolicy.

GetSchedulerPolicy()

std::error_code numapp::ll::GetSchedulerPolicy ( pid_t pid, int * policy, int * static_priority, int * dynamic_priority )

noexcept

A low-level, and error prone function to get policy.

Prefer to use the numapp::Scheduler instead.

NumaNodeToCpumask()

std::error_code numapp::ll::NumaNodeToCpumask ( int node, Cpumask & mask )

noexcept

Convert NUMA node number to corresponding CPU mask.

Parameters

	node	NUMA node number to get mask for.
[out]	mask	Destination CPU mask.

SetCpuAffinity()

std::error_code numapp::ll::SetCpuAffinity ( pid_t ttid, Cpumask const & mask )

noexcept

Set CPU affinity.

Parameters

ttid	Thread id to apply the affinity to.
mask	CPU mask describing the desired affinity.

Returns

error code.

Related man-page(s):

• numa(3)

SetMemPolicy() [1/2]

std::error_code numapp::ll::SetMemPolicy ( int mode, Nodemask const & mask )

noexcept

Set active memory policy for calling thread.

Parameters

mode	memory policy.
mask	the input nodemask.

Returns

errors from get_mempolicy.

SetMemPolicy() [2/2]

std::error_code numapp::ll::SetMemPolicy ( void * addr, std::size_t len, int mode, Nodemask const & mask, unsigned flags )

noexcept

Set memory policy for memory range.

Parameters

addr	starting address.
len	memory range length.
mode	memory policy.
mask	the input nodemask.
flags	combination of MPOL_MF_* flags

Returns

errors from mbind.

SetSchedulerPolicy()

std::error_code numapp::ll::SetSchedulerPolicy ( pid_t pid, int policy, int static_priority, int dynamic_priority )

noexcept

A low-level, and error prone function to set policy.

Prefer to use the numapp::Apply() functions instead.