PAPI  5.3.2.0
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PAPI_read_counters Class Reference

Read and reset counters. More...

Detailed Description

Fortran Interface:
#include "fpapi.h"
PAPIF_read_counters( C_LONG_LONG(*) values, C_INT array_len, C_INT check )
See Also
PAPI_read_counters
@par C Interface:
\#include <papi.h> @n
int PAPI_read_counters( long long *values, int array_len );
Parameters
*valuesan array to hold the counter values of the counting events
arry_lenthe number of items in the *events array
Precondition
These calls assume an initialized PAPI library and a properly added event set.
Postcondition
The counters are reset and left running after the call.
Return values
PAPI_EINVALOne or more of the arguments is invalid.
PAPI_ESYSA system or C library call failed inside PAPI, see the errno variable.

PAPI_read_counters() copies the event counters into the array *values.

do_100events();
if ( PAPI_read_counters( values, num_hwcntrs ) != PAPI_OK )
handlw_error(1);
// values[0] now equals 100
do_100events();
if ( PAPI_accum_counters( values, num_hwcntrs ) != PAPI_OK )
handle_error(1);
// values[0] now equals 200
values[0] = -100;
do_100events();
if ( PAPI_accum_counters(values, num_hwcntrs ) != PAPI_OK )
handle_error();
// values[0] now equals 0
*
See Also
PAPI_set_opt() PAPI_start_counters()

The documentation for this class was generated from the following file: