Utilities::System Namespace Reference

Classes
struct	MemoryStats

Functions
double	get_cpu_load ()
const std::string	get_current_vectorization_level ()
void	get_memory_stats (MemoryStats &stats)
std::string	get_hostname ()
std::string	get_time ()
std::string	get_date ()
void	posix_memalign (void **memptr, size_t alignment, size_t size)

Detailed Description

A namespace for utility functions that probe system properties.

Function Documentation

double Utilities::System::get_cpu_load

(

)

Return the CPU load as returned by "uptime". Note that the interpretation of this number depends on the actual number of processors in the machine. This is presently only implemented on Linux, using the /proc/loadavg pseudo-file, on other systems we simply return zero.

Definition at line 622 of file utilities.cc.

const std::string Utilities::System::get_current_vectorization_level

(

)

Return the current level of vectorization as described by DEAL_II_COMPILER_VECTORIZATION_LEVEL in vectorization.h as a string. The list of possible return values is:

VECTORIZATION_LEVEL	Return Value	Width in bits
0	disabled	64
1	SSE2	128
2	AVX	256
3	AVX512	512

Definition at line 630 of file utilities.cc.

void Utilities::System::get_memory_stats

(

MemoryStats &

stats

)

Fill the stats structure with information about the memory consumption of this process. This is only implemented on Linux.

Definition at line 652 of file utilities.cc.

std::string Utilities::System::get_hostname

(

)

Return the name of the host this process runs on.

Definition at line 686 of file utilities.cc.

std::string Utilities::System::get_time

(

)

Return the present time as HH:MM:SS.

Definition at line 701 of file utilities.cc.

std::string Utilities::System::get_date

(

)

Return the present date as YYYY/MM/DD. MM and DD may be either one or two digits.

Definition at line 717 of file utilities.cc.

void Utilities::System::posix_memalign	(	void **	memptr,
		size_t	alignment,
		size_t	size
	)

Call the system function posix_memalign, or a replacement function if not available, to allocate memory with a certain minimal alignment. The first argument will then return a pointer to this memory block that can be released later on through a standard free call.

Parameters

memptr	The address of a pointer variable that will after this call point to the allocated memory.
alignment	The minimal alignment of the memory block, in bytes.
size	The size of the memory block to be allocated, in bytes.

Note

This function checks internally for error codes, rather than leaving this task to the calling site.

Definition at line 732 of file utilities.cc.