papi_get_real_usec(3) - Linux man page

Name

PAPI_get_real_cyc - get real time counter value in clock cycles

PAPI_get_real_usec - get real time counter value in microseconds

Synopsis

C Interface

#include <papi.h>long_long PAPI_get_real_cyc(void);long_long PAPI_get_real_usec(void);

Fortran Interface

#include "fpapi.h"PAPIF_get_real_usec(C_LONG_LONG time)PAPIF_get_real_cyc(C_LONG_LONG real_cyc)

Description

Both of these functions return the total real time passed since some arbitrary starting point. The time is returned in clock cycles or microseconds respectively. These calls are equivalent to wall clock time.

Errors

These functions always succeed.

Example

s = PAPI_get_real_cyc();
your_slow_code();
e = PAPI_get_real_cyc();
printf("Wallclock cycles: %lld\n",e-s);

Bugs

These functions have no known bugs.