litl_timer.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include "litl_timer.h"

Go to the source code of this file.

Macros
#define	ERROR_TIMER_NOT_AVAILABLE()
#define	TIMER_DEFAULT   litl_get_time_monotonic
#define	RUN_BENCHMARK(_func_)
#define	ticks(val)

Functions
litl_time_t	litl_get_time_none ()
	Ultra-fast measurement function. More...
void	litl_time_initialize ()
	Initializes the timing mechanism. More...
int	litl_set_timing_method (litl_timing_method_t callback)
	Selects the timing function to use. More...
litl_time_t	litl_get_time_monotonic_raw ()
	Uses clock_gettime(CLOCK_MONOTONIC_RAW) More...
litl_time_t	litl_get_time_monotonic ()
	Uses clock_gettime(CLOCK_MONOTONIC) More...
litl_time_t	litl_get_time_realtime ()
	Uses clock_gettime(CLOCK_REALTIME) More...
litl_time_t	litl_get_time_process_cputime ()
	Uses clock_gettime(CLOCK_PROCESS_CPUTIME) More...
litl_time_t	litl_get_time_thread_cputime ()
	Uses clock_gettime(CLOCK_THREAD_CPUTIME) More...
litl_time_t	litl_get_time_ticks ()
	Uses CPU-specific register (for instance, rdtsc for X86* processors) More...

Variables
litl_timing_method_t	litl_get_time = TIMER_DEFAULT
	Calls the selected timing method and get the current time in ns. More...

Macro Definition Documentation

ERROR_TIMER_NOT_AVAILABLE

#define ERROR_TIMER_NOT_AVAILABLE

(

)

Value:

    do {                \
    fprintf(stderr, "Trying to use timer function %s, but it is not available on this platform\n",__FUNCTION__); \
    abort();                                \
  } while(0)

Definition at line 19 of file litl_timer.c.

RUN_BENCHMARK

#define RUN_BENCHMARK

(

_func_

)

Value:

    do {            \
    cur_score = __litl_time_benchmark_generic(_func_);  \
    if(cur_score > best_score) {            \
      best_score = cur_score;               \
      litl_set_timing_method(_func_);           \
    }                           \
  }while(0)

ticks

#define ticks

(

val

)

Value:

    do {                        \
    uint32_t __a,__d;                       \
    asm volatile("rdtsc" : "=a" (__a), "=d" (__d));     \
    (val) = ((litl_time_t)__a) | (((litl_time_t)__d)<<32);  \
  } while(0)

TIMER_DEFAULT

#define TIMER_DEFAULT   litl_get_time_monotonic

Definition at line 29 of file litl_timer.c.