#include "cs_config.h"
#include "cs_defs.h"
#include <math.h>
#include <time.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include "cs_timer.h"

Include dependency graph for cs_timer.c:

Macros
#define	_POSIX_C_SOURCE 200112L

Functions
double	cs_timer_wtime (void)
	Return Wall clock time. More...

double	cs_timer_cpu_time (void)
	Return CPU time. More...

void	cs_timer_cpu_times (double user_time, double system_time)
	Return separate user and system CPU times. More...

cs_timer_t	cs_timer_time (void)
	Return a timer's value. More...

cs_timer_counter_t	cs_timer_diff (const cs_timer_t t0, const cs_timer_t t1)
	Compute the difference between 2 timers. More...

const char *	cs_timer_wtime_method (void)
	Return method used to return wall clock time. More...

const char *	cs_timer_cpu_time_method (void)
	Return method used to return CPU time. More...

Macro Definition Documentation

◆ _POSIX_C_SOURCE

#define _POSIX_C_SOURCE 200112L

Function Documentation

◆ cs_timer_cpu_time()

double cs_timer_cpu_time ( void )

Return CPU time.

Note that in the rare case that only the minimal C library clock() method is available (see cs_timer_cpu_time_method()), at least one of the cs_timer_...() functions (possibly this one) must be called upon program start for this function to be used. In addition, in this case, time may "loop" back to 0 every multiple of 2^size_t / CLOCKS_PER_SEC seconds.

Returns: current CPU time usage, or -1 if unable to compute.

◆ cs_timer_cpu_time_method()

const char* cs_timer_cpu_time_method ( void )

Return method used to return CPU time.

Returns: short description of method used to return CPU time.

◆ cs_timer_cpu_times()

void cs_timer_cpu_times	(	double *	user_time,
		double *	system_time
	)

Return separate user and system CPU times.

Note that in the rare case that only the minimal C library clock() method is available, this function will return -1 values.

Parameters

[out]	user_time	current user CPU usage.
[out]	system_time	current system CPU usage.

◆ cs_timer_diff()

cs_timer_counter_t cs_timer_diff	(	const cs_timer_t *	t0,
		const cs_timer_t *	t1
	)

Compute the difference between 2 timers.

Parameters

[in]	t0	oldest timer value
[in]	t1	most recent timer value

Returns: last - first timer value.

◆ cs_timer_time()

cs_timer_t cs_timer_time ( void )

Return a timer's value.

Returns: timer structure.

◆ cs_timer_wtime()

double cs_timer_wtime ( void )

Return Wall clock time.

Returns: elapsed time from first call of a function of the cs_timer_...() series, or -1 if unable to compute.

◆ cs_timer_wtime_method()

const char* cs_timer_wtime_method ( void )

Return method used to return wall clock time.

Returns: short description of method used to return wall clock time.

Macros

Functions